<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>gradients.cpp Example File | Qt Widgets 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-painting-gradients-example.html">Gradients</a></td><td >gradients.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">gradients.cpp Example File</h1> <span class="subtitle">painting/gradients/gradients.cpp</span> <!-- $$$painting/gradients/gradients.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "gradients.h"</span> <span class="preprocessor">#include "hoverpoints.h"</span> <span class="preprocessor">#include <algorithm></span> ShadeWidget<span class="operator">::</span>ShadeWidget(ShadeType type<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> m_shade_type(type)<span class="operator">,</span> m_alpha_gradient(<span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)) { <span class="comment">// Checkers background</span> <span class="keyword">if</span> (m_shade_type <span class="operator">=</span><span class="operator">=</span> ARGBShade) { <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pm(<span class="number">20</span><span class="operator">,</span> <span class="number">20</span>); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> pmp(<span class="operator">&</span>pm); pmp<span class="operator">.</span>fillRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>lightGray); pmp<span class="operator">.</span>fillRect(<span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>lightGray); pmp<span class="operator">.</span>fillRect(<span class="number">0</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>darkGray); pmp<span class="operator">.</span>fillRect(<span class="number">10</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>darkGray); pmp<span class="operator">.</span>end(); <span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> pal <span class="operator">=</span> palette(); pal<span class="operator">.</span>setBrush(backgroundRole()<span class="operator">,</span> <span class="type"><a href="../qtgui/qbrush.html">QBrush</a></span>(pm)); setAutoFillBackground(<span class="keyword">true</span>); setPalette(pal); } <span class="keyword">else</span> { setAttribute(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>WA_NoBackground); } <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> points; points <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span> sizeHint()<span class="operator">.</span>height()) <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(sizeHint()<span class="operator">.</span>width()<span class="operator">,</span> <span class="number">0</span>); m_hoverPoints <span class="operator">=</span> <span class="keyword">new</span> HoverPoints(<span class="keyword">this</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>CircleShape); <span class="comment">// m_hoverPoints->setConnectionType(HoverPoints::LineConnection);</span> m_hoverPoints<span class="operator">-</span><span class="operator">></span>setPoints(points); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setPointLock(<span class="number">0</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>LockToLeft); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setPointLock(<span class="number">1</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>LockToRight); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setSortType(HoverPoints<span class="operator">::</span>XSort); setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed); connect(m_hoverPoints<span class="operator">,</span> <span class="operator">&</span>HoverPoints<span class="operator">::</span>pointsChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>ShadeWidget<span class="operator">::</span>colorsChanged); } <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> ShadeWidget<span class="operator">::</span>points() <span class="keyword">const</span> { <span class="keyword">return</span> m_hoverPoints<span class="operator">-</span><span class="operator">></span>points(); } <span class="type"><a href="../qtcore/qtglobal.html#uint-typedef">uint</a></span> ShadeWidget<span class="operator">::</span>colorAt(<span class="type">int</span> x) { generateShade(); <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> pts <span class="operator">=</span> m_hoverPoints<span class="operator">-</span><span class="operator">></span>points(); <span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">1</span>; i <span class="operator"><</span> pts<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (pts<span class="operator">.</span>at(i<span class="operator">-</span><span class="number">1</span>)<span class="operator">.</span>x() <span class="operator"><</span><span class="operator">=</span> x <span class="operator">&</span><span class="operator">&</span> pts<span class="operator">.</span>at(i)<span class="operator">.</span>x() <span class="operator">></span><span class="operator">=</span> x) { <span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span> l(pts<span class="operator">.</span>at(i<span class="operator">-</span><span class="number">1</span>)<span class="operator">,</span> pts<span class="operator">.</span>at(i)); l<span class="operator">.</span>setLength(l<span class="operator">.</span>length() <span class="operator">*</span> ((x <span class="operator">-</span> l<span class="operator">.</span>x1()) <span class="operator">/</span> l<span class="operator">.</span>dx())); <span class="keyword">return</span> m_shade<span class="operator">.</span>pixel(<a href="../qtcore/qtglobal.html#qRound">qRound</a>(<a href="../qtcore/qtglobal.html#qMin">qMin</a>(l<span class="operator">.</span>x2()<span class="operator">,</span> (<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>(m_shade<span class="operator">.</span>width() <span class="operator">-</span> <span class="number">1</span>))))<span class="operator">,</span> <a href="../qtcore/qtglobal.html#qRound">qRound</a>(<a href="../qtcore/qtglobal.html#qMin">qMin</a>(l<span class="operator">.</span>y2()<span class="operator">,</span> <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>(m_shade<span class="operator">.</span>height() <span class="operator">-</span> <span class="number">1</span>)))); } } <span class="keyword">return</span> <span class="number">0</span>; } <span class="type">void</span> ShadeWidget<span class="operator">::</span>setGradientStops(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStops-typedef">QGradientStops</a></span> <span class="operator">&</span>stops) { <span class="keyword">if</span> (m_shade_type <span class="operator">=</span><span class="operator">=</span> ARGBShade) { m_alpha_gradient <span class="operator">=</span> <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> <span class="number">0</span>); <span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator"><</span>stops<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> c <span class="operator">=</span> stops<span class="operator">.</span>at(i)<span class="operator">.</span>second; m_alpha_gradient<span class="operator">.</span>setColorAt(stops<span class="operator">.</span>at(i)<span class="operator">.</span>first<span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(c<span class="operator">.</span>red()<span class="operator">,</span> c<span class="operator">.</span>green()<span class="operator">,</span> c<span class="operator">.</span>blue())); } m_shade <span class="operator">=</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span>(); generateShade(); update(); } } <span class="type">void</span> ShadeWidget<span class="operator">::</span>paintEvent(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>) { generateShade(); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> p(<span class="keyword">this</span>); p<span class="operator">.</span>drawImage(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_shade); p<span class="operator">.</span>setPen(<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">146</span><span class="operator">,</span> <span class="number">146</span><span class="operator">,</span> <span class="number">146</span>)); p<span class="operator">.</span>drawRect(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width() <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> height() <span class="operator">-</span> <span class="number">1</span>); } <span class="type">void</span> ShadeWidget<span class="operator">::</span>generateShade() { <span class="keyword">if</span> (m_shade<span class="operator">.</span>isNull() <span class="operator">|</span><span class="operator">|</span> m_shade<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> size()) { <span class="keyword">if</span> (m_shade_type <span class="operator">=</span><span class="operator">=</span> ARGBShade) { m_shade <span class="operator">=</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span>(size()<span class="operator">,</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied); m_shade<span class="operator">.</span>fill(<span class="number">0</span>); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> p(<span class="operator">&</span>m_shade); p<span class="operator">.</span>fillRect(rect()<span class="operator">,</span> m_alpha_gradient); p<span class="operator">.</span>setCompositionMode(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationIn); <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> fade(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> height()); fade<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">255</span>)); fade<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)); p<span class="operator">.</span>fillRect(rect()<span class="operator">,</span> fade); } <span class="keyword">else</span> { m_shade <span class="operator">=</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span>(size()<span class="operator">,</span> <span class="type"><a href="../qtgui/qimage.html">QImage</a></span><span class="operator">::</span>Format_RGB32); <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> shade(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> height()); shade<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black); <span class="keyword">if</span> (m_shade_type <span class="operator">=</span><span class="operator">=</span> RedShade) shade<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red); <span class="keyword">else</span> <span class="keyword">if</span> (m_shade_type <span class="operator">=</span><span class="operator">=</span> GreenShade) shade<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>green); <span class="keyword">else</span> shade<span class="operator">.</span>setColorAt(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>blue); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> p(<span class="operator">&</span>m_shade); p<span class="operator">.</span>fillRect(rect()<span class="operator">,</span> shade); } } } GradientEditor<span class="operator">::</span>GradientEditor(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>vbox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>); vbox<span class="operator">-</span><span class="operator">></span>setSpacing(<span class="number">1</span>); vbox<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">1</span>); m_red_shade <span class="operator">=</span> <span class="keyword">new</span> ShadeWidget(ShadeWidget<span class="operator">::</span>RedShade<span class="operator">,</span> <span class="keyword">this</span>); m_green_shade <span class="operator">=</span> <span class="keyword">new</span> ShadeWidget(ShadeWidget<span class="operator">::</span>GreenShade<span class="operator">,</span> <span class="keyword">this</span>); m_blue_shade <span class="operator">=</span> <span class="keyword">new</span> ShadeWidget(ShadeWidget<span class="operator">::</span>BlueShade<span class="operator">,</span> <span class="keyword">this</span>); m_alpha_shade <span class="operator">=</span> <span class="keyword">new</span> ShadeWidget(ShadeWidget<span class="operator">::</span>ARGBShade<span class="operator">,</span> <span class="keyword">this</span>); vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_red_shade); vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_green_shade); vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_blue_shade); vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_alpha_shade); connect(m_red_shade<span class="operator">,</span> <span class="operator">&</span>ShadeWidget<span class="operator">::</span>colorsChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientEditor<span class="operator">::</span>pointsUpdated); connect(m_green_shade<span class="operator">,</span> <span class="operator">&</span>ShadeWidget<span class="operator">::</span>colorsChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientEditor<span class="operator">::</span>pointsUpdated); connect(m_blue_shade<span class="operator">,</span> <span class="operator">&</span>ShadeWidget<span class="operator">::</span>colorsChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientEditor<span class="operator">::</span>pointsUpdated); connect(m_alpha_shade<span class="operator">,</span> <span class="operator">&</span>ShadeWidget<span class="operator">::</span>colorsChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientEditor<span class="operator">::</span>pointsUpdated); } <span class="keyword">inline</span> <span class="keyword">static</span> bool x_less_than(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> <span class="operator">&</span>p1<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> <span class="operator">&</span>p2) { <span class="keyword">return</span> p1<span class="operator">.</span>x() <span class="operator"><</span> p2<span class="operator">.</span>x(); } <span class="type">void</span> GradientEditor<span class="operator">::</span>pointsUpdated() { <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> w <span class="operator">=</span> m_alpha_shade<span class="operator">-</span><span class="operator">></span>width(); <span class="type"><a href="../qtgui/qgradient.html#QGradientStops-typedef">QGradientStops</a></span> stops; <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> points; points <span class="operator">+</span><span class="operator">=</span> m_red_shade<span class="operator">-</span><span class="operator">></span>points(); points <span class="operator">+</span><span class="operator">=</span> m_green_shade<span class="operator">-</span><span class="operator">></span>points(); points <span class="operator">+</span><span class="operator">=</span> m_blue_shade<span class="operator">-</span><span class="operator">></span>points(); points <span class="operator">+</span><span class="operator">=</span> m_alpha_shade<span class="operator">-</span><span class="operator">></span>points(); std<span class="operator">::</span>sort(points<span class="operator">.</span>begin()<span class="operator">,</span> points<span class="operator">.</span>end()<span class="operator">,</span> x_less_than); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> points<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> x <span class="operator">=</span> <span class="type">int</span>(points<span class="operator">.</span>at(i)<span class="operator">.</span>x()); <span class="keyword">if</span> (i <span class="operator">+</span> <span class="number">1</span> <span class="operator"><</span> points<span class="operator">.</span>size() <span class="operator">&</span><span class="operator">&</span> x <span class="operator">=</span><span class="operator">=</span> points<span class="operator">.</span>at(i <span class="operator">+</span> <span class="number">1</span>)<span class="operator">.</span>x()) <span class="keyword">continue</span>; <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> color((<span class="number">0x00ff0000</span> <span class="operator">&</span> m_red_shade<span class="operator">-</span><span class="operator">></span>colorAt(<span class="type">int</span>(x))) <span class="operator">></span><span class="operator">></span> <span class="number">16</span><span class="operator">,</span> (<span class="number">0x0000ff00</span> <span class="operator">&</span> m_green_shade<span class="operator">-</span><span class="operator">></span>colorAt(<span class="type">int</span>(x))) <span class="operator">></span><span class="operator">></span> <span class="number">8</span><span class="operator">,</span> (<span class="number">0x000000ff</span> <span class="operator">&</span> m_blue_shade<span class="operator">-</span><span class="operator">></span>colorAt(<span class="type">int</span>(x)))<span class="operator">,</span> (<span class="number">0xff000000</span> <span class="operator">&</span> m_alpha_shade<span class="operator">-</span><span class="operator">></span>colorAt(<span class="type">int</span>(x))) <span class="operator">></span><span class="operator">></span> <span class="number">24</span>); <span class="keyword">if</span> (x <span class="operator">/</span> w <span class="operator">></span> <span class="number">1</span>) <span class="keyword">return</span>; stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(x <span class="operator">/</span> w<span class="operator">,</span> color); } m_alpha_shade<span class="operator">-</span><span class="operator">></span>setGradientStops(stops); <span class="keyword">emit</span> gradientStopsChanged(stops); } <span class="keyword">static</span> <span class="type">void</span> set_shade_points(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> <span class="operator">&</span>points<span class="operator">,</span> ShadeWidget <span class="operator">*</span>shade) { shade<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">-</span><span class="operator">></span>setPoints(points); shade<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">-</span><span class="operator">></span>setPointLock(<span class="number">0</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>LockToLeft); shade<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">-</span><span class="operator">></span>setPointLock(points<span class="operator">.</span>size() <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>LockToRight); shade<span class="operator">-</span><span class="operator">></span>update(); } <span class="type">void</span> GradientEditor<span class="operator">::</span>setGradientStops(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStops-typedef">QGradientStops</a></span> <span class="operator">&</span>stops) { <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> pts_red<span class="operator">,</span> pts_green<span class="operator">,</span> pts_blue<span class="operator">,</span> pts_alpha; <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> h_red <span class="operator">=</span> m_red_shade<span class="operator">-</span><span class="operator">></span>height(); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> h_green <span class="operator">=</span> m_green_shade<span class="operator">-</span><span class="operator">></span>height(); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> h_blue <span class="operator">=</span> m_blue_shade<span class="operator">-</span><span class="operator">></span>height(); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> h_alpha <span class="operator">=</span> m_alpha_shade<span class="operator">-</span><span class="operator">></span>height(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> stops<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> pos <span class="operator">=</span> stops<span class="operator">.</span>at(i)<span class="operator">.</span>first; <span class="type"><a href="../qtgui/qcolor.html#QRgb-typedef">QRgb</a></span> color <span class="operator">=</span> stops<span class="operator">.</span>at(i)<span class="operator">.</span>second<span class="operator">.</span>rgba(); pts_red <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(pos <span class="operator">*</span> m_red_shade<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> h_red <span class="operator">-</span> <a href="../qtgui/qcolor.html#qRed">qRed</a>(color) <span class="operator">*</span> h_red <span class="operator">/</span> <span class="number">255</span>); pts_green <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(pos <span class="operator">*</span> m_green_shade<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> h_green <span class="operator">-</span> <a href="../qtgui/qcolor.html#qGreen">qGreen</a>(color) <span class="operator">*</span> h_green <span class="operator">/</span> <span class="number">255</span>); pts_blue <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(pos <span class="operator">*</span> m_blue_shade<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> h_blue <span class="operator">-</span> <a href="../qtgui/qcolor.html#qBlue">qBlue</a>(color) <span class="operator">*</span> h_blue <span class="operator">/</span> <span class="number">255</span>); pts_alpha <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(pos <span class="operator">*</span> m_alpha_shade<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> h_alpha <span class="operator">-</span> <a href="../qtgui/qcolor.html#qAlpha">qAlpha</a>(color) <span class="operator">*</span> h_alpha <span class="operator">/</span> <span class="number">255</span>); } set_shade_points(pts_red<span class="operator">,</span> m_red_shade); set_shade_points(pts_green<span class="operator">,</span> m_green_shade); set_shade_points(pts_blue<span class="operator">,</span> m_blue_shade); set_shade_points(pts_alpha<span class="operator">,</span> m_alpha_shade); } GradientWidget<span class="operator">::</span>GradientWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { setWindowTitle(tr(<span class="string">"Gradients"</span>)); m_renderer <span class="operator">=</span> <span class="keyword">new</span> GradientRenderer(<span class="keyword">this</span>); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>mainGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(<span class="keyword">this</span>); mainGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Gradients"</span>)); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>editorGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); editorGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Color Editor"</span>)); m_editor <span class="operator">=</span> <span class="keyword">new</span> GradientEditor(editorGroup); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>typeGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); typeGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Gradient Type"</span>)); m_linearButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Linear Gradient"</span>)<span class="operator">,</span> typeGroup); m_radialButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Radial Gradient"</span>)<span class="operator">,</span> typeGroup); m_conicalButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Conical Gradient"</span>)<span class="operator">,</span> typeGroup); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>spreadGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); spreadGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Spread Method"</span>)); m_padSpreadButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Pad Spread"</span>)<span class="operator">,</span> spreadGroup); m_reflectSpreadButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Reflect Spread"</span>)<span class="operator">,</span> spreadGroup); m_repeatSpreadButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qradiobutton.html">QRadioButton</a></span>(tr(<span class="string">"Repeat Spread"</span>)<span class="operator">,</span> spreadGroup); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>presetsGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); presetsGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Presets"</span>)); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>prevPresetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"<"</span>)<span class="operator">,</span> presetsGroup); m_presetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"(unset)"</span>)<span class="operator">,</span> presetsGroup); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>nextPresetButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">">"</span>)<span class="operator">,</span> presetsGroup); updatePresetName(); <span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>defaultsGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup); defaultsGroup<span class="operator">-</span><span class="operator">></span>setTitle(tr(<span class="string">"Examples"</span>)); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>default1Button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"1"</span>)<span class="operator">,</span> defaultsGroup); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>default2Button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"2"</span>)<span class="operator">,</span> defaultsGroup); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>default3Button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"3"</span>)<span class="operator">,</span> defaultsGroup); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>default4Button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Reset"</span>)<span class="operator">,</span> editorGroup); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>showSourceButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); showSourceButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Show Source"</span>)); <span class="preprocessor">#if QT_CONFIG(opengl)</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>enableOpenGLButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Use OpenGL"</span>)); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); enableOpenGLButton<span class="operator">-</span><span class="operator">></span>setChecked(m_renderer<span class="operator">-</span><span class="operator">></span>usesOpenGL()); <span class="preprocessor">#endif</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>whatsThisButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup); whatsThisButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"What's This?"</span>)); whatsThisButton<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); <span class="comment">// Layouts</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(<span class="keyword">this</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_renderer); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(mainGroup); mainGroup<span class="operator">-</span><span class="operator">></span>setFixedWidth(<span class="number">200</span>); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(mainGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(editorGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(typeGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(spreadGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(presetsGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(defaultsGroup); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>); mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(showSourceButton); <span class="preprocessor">#if QT_CONFIG(opengl)</span> mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(enableOpenGLButton); <span class="preprocessor">#endif</span> mainGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(whatsThisButton); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>editorGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(editorGroup); editorGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_editor); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>typeGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(typeGroup); typeGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_linearButton); typeGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_radialButton); typeGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_conicalButton); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>spreadGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(spreadGroup); spreadGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_padSpreadButton); spreadGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_repeatSpreadButton); spreadGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_reflectSpreadButton); <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>presetsGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(presetsGroup); presetsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(prevPresetButton); presetsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_presetButton<span class="operator">,</span> <span class="number">1</span>); presetsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(nextPresetButton); <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>defaultsGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(defaultsGroup); defaultsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(default1Button); defaultsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(default2Button); defaultsGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(default3Button); editorGroupLayout<span class="operator">-</span><span class="operator">></span>addWidget(default4Button); connect(m_editor<span class="operator">,</span> <span class="operator">&</span>GradientEditor<span class="operator">::</span>gradientStopsChanged<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setGradientStops); connect(m_linearButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setLinearGradient); connect(m_radialButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setRadialGradient); connect(m_conicalButton<span class="operator">,</span><span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setConicalGradient); connect(m_padSpreadButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setPadSpread); connect(m_reflectSpreadButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setReflectSpread); connect(m_repeatSpreadButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qradiobutton.html">QRadioButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>setRepeatSpread); connect(prevPresetButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setPrevPreset); connect(m_presetButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setPreset); connect(nextPresetButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setNextPreset); connect(default1Button<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setDefault1); connect(default2Button<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setDefault2); connect(default3Button<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setDefault3); connect(default4Button<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>GradientWidget<span class="operator">::</span>setDefault4); connect(showSourceButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>GradientRenderer<span class="operator">::</span>showSource); <span class="preprocessor">#if QT_CONFIG(opengl)</span> connect(enableOpenGLButton<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked)<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>ArthurFrame<span class="operator">::</span>enableOpenGL); <span class="preprocessor">#endif</span> connect(whatsThisButton<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked)<span class="operator">,</span> m_renderer<span class="operator">,</span> <span class="operator">&</span>ArthurFrame<span class="operator">::</span>setDescriptionEnabled); connect(whatsThisButton<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked)<span class="operator">,</span> m_renderer<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">,</span> <span class="operator">&</span>HoverPoints<span class="operator">::</span>setDisabled); connect(m_renderer<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span>ArthurFrame<span class="operator">::</span>descriptionEnabledChanged)<span class="operator">,</span> whatsThisButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qpushbutton.html">QPushButton</a></span><span class="operator">::</span>setChecked); connect(m_renderer<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span>ArthurFrame<span class="operator">::</span>descriptionEnabledChanged)<span class="operator">,</span> m_renderer<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">,</span> <span class="operator">&</span>HoverPoints<span class="operator">::</span>setDisabled); m_renderer<span class="operator">-</span><span class="operator">></span>loadSourceFile(<span class="string">":res/gradients/gradients.cpp"</span>); m_renderer<span class="operator">-</span><span class="operator">></span>loadDescription(<span class="string">":res/gradients/gradients.html"</span>); <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">50</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setDefault1())); } <span class="type">void</span> GradientWidget<span class="operator">::</span>setDefault(<span class="type">int</span> config) { <span class="type"><a href="../qtgui/qgradient.html#QGradientStops-typedef">QGradientStops</a></span> stops; <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> points; <span class="keyword">switch</span> (config) { <span class="keyword">case</span> <span class="number">1</span>: stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.04</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff131360</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.08</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff202ccc</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.42</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff93d3f9</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.51</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffb3e6ff</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.73</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffffffec</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.92</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff5353d9</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.96</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff262666</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0</span>)); m_linearButton<span class="operator">-</span><span class="operator">></span>animateClick(); m_repeatSpreadButton<span class="operator">-</span><span class="operator">></span>animateClick(); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="number">2</span>: stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffffffff</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.11</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xfff9ffa0</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.13</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xfff9ff99</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.14</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xfff3ff86</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.49</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff93b353</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.87</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff264619</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.96</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff0c1306</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0</span>)); m_radialButton<span class="operator">-</span><span class="operator">></span>animateClick(); m_padSpreadButton<span class="operator">-</span><span class="operator">></span>animateClick(); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="number">3</span>: stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.10</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffe0cc73</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.17</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffc6a006</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.46</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff600659</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.72</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff0680ac</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.92</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffb9d9e6</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0</span>)); m_conicalButton<span class="operator">-</span><span class="operator">></span>animateClick(); m_padSpreadButton<span class="operator">-</span><span class="operator">></span>animateClick(); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="number">4</span>: stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">0.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xff000000</span>)); stops <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStop-typedef">QGradientStop</a></span>(<span class="number">1.00</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span><span class="operator">::</span>fromRgba(<span class="number">0xffffffff</span>)); <span class="keyword">break</span>; <span class="keyword">default</span>: <a href="../qtcore/qtglobal.html#qWarning">qWarning</a>(<span class="string">"bad default: %d\n"</span><span class="operator">,</span> config); <span class="keyword">break</span>; } <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> pts; <span class="type">int</span> h_off <span class="operator">=</span> m_renderer<span class="operator">-</span><span class="operator">></span>width() <span class="operator">/</span> <span class="number">10</span>; <span class="type">int</span> v_off <span class="operator">=</span> m_renderer<span class="operator">-</span><span class="operator">></span>height() <span class="operator">/</span> <span class="number">8</span>; pts <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(m_renderer<span class="operator">-</span><span class="operator">></span>width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> m_renderer<span class="operator">-</span><span class="operator">></span>height() <span class="operator">/</span> <span class="number">2</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(m_renderer<span class="operator">-</span><span class="operator">></span>width() <span class="operator">/</span> <span class="number">2</span> <span class="operator">-</span> h_off<span class="operator">,</span> m_renderer<span class="operator">-</span><span class="operator">></span>height() <span class="operator">/</span> <span class="number">2</span> <span class="operator">-</span> v_off); m_editor<span class="operator">-</span><span class="operator">></span>setGradientStops(stops); m_renderer<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">-</span><span class="operator">></span>setPoints(pts); m_renderer<span class="operator">-</span><span class="operator">></span>setGradientStops(stops); } <span class="type">void</span> GradientWidget<span class="operator">::</span>updatePresetName() { <span class="type"><a href="../qtcore/qmetaenum.html">QMetaEnum</a></span> presetEnum <span class="operator">=</span> <span class="type"><a href="../qtcore/qmetaenum.html">QMetaEnum</a></span><span class="operator">::</span>fromType<span class="operator"><</span><span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>Preset<span class="operator">></span>(); m_presetButton<span class="operator">-</span><span class="operator">></span>setText(QLatin1String(presetEnum<span class="operator">.</span>key(m_presetIndex))); } <span class="type">void</span> GradientWidget<span class="operator">::</span>changePresetBy(<span class="type">int</span> indexOffset) { <span class="type"><a href="../qtcore/qmetaenum.html">QMetaEnum</a></span> presetEnum <span class="operator">=</span> <span class="type"><a href="../qtcore/qmetaenum.html">QMetaEnum</a></span><span class="operator">::</span>fromType<span class="operator"><</span><span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>Preset<span class="operator">></span>(); m_presetIndex <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qBound">qBound</a>(<span class="number">0</span><span class="operator">,</span> m_presetIndex <span class="operator">+</span> indexOffset<span class="operator">,</span> presetEnum<span class="operator">.</span>keyCount() <span class="operator">-</span> <span class="number">1</span>); <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>Preset preset <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>Preset<span class="operator">></span>(presetEnum<span class="operator">.</span>value(m_presetIndex)); <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span> gradient(preset); <span class="keyword">if</span> (gradient<span class="operator">.</span>type() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>LinearGradient) <span class="keyword">return</span>; <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> <span class="operator">*</span>linearGradientPointer <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span> <span class="operator">*</span><span class="operator">></span>(<span class="operator">&</span>gradient); <span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span> objectStopsLine(linearGradientPointer<span class="operator">-</span><span class="operator">></span>start()<span class="operator">,</span> linearGradientPointer<span class="operator">-</span><span class="operator">></span>finalStop()); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> scaleX <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qFuzzyIsNull">qFuzzyIsNull</a>(objectStopsLine<span class="operator">.</span>dx()) <span class="operator">?</span> <span class="number">1.0</span> : (<span class="number">0.8</span> <span class="operator">*</span> m_renderer<span class="operator">-</span><span class="operator">></span>width() <span class="operator">/</span> <a href="../qtcore/qtglobal.html#qAbs">qAbs</a>(objectStopsLine<span class="operator">.</span>dx())); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> scaleY <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qFuzzyIsNull">qFuzzyIsNull</a>(objectStopsLine<span class="operator">.</span>dy()) <span class="operator">?</span> <span class="number">1.0</span> : (<span class="number">0.8</span> <span class="operator">*</span> m_renderer<span class="operator">-</span><span class="operator">></span>height() <span class="operator">/</span> <a href="../qtcore/qtglobal.html#qAbs">qAbs</a>(objectStopsLine<span class="operator">.</span>dy())); <span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span> logicalStopsLine <span class="operator">=</span> <span class="type"><a href="../qtgui/qtransform.html">QTransform</a></span><span class="operator">::</span>fromScale(scaleX<span class="operator">,</span> scaleY)<span class="operator">.</span>map(objectStopsLine); logicalStopsLine<span class="operator">.</span>translate(m_renderer<span class="operator">-</span><span class="operator">></span>rect()<span class="operator">.</span>center() <span class="operator">-</span> logicalStopsLine<span class="operator">.</span>center()); <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> logicalStops; logicalStops <span class="operator"><</span><span class="operator"><</span> logicalStopsLine<span class="operator">.</span>p1() <span class="operator"><</span><span class="operator"><</span> logicalStopsLine<span class="operator">.</span>p2(); m_linearButton<span class="operator">-</span><span class="operator">></span>animateClick(); m_padSpreadButton<span class="operator">-</span><span class="operator">></span>animateClick(); m_editor<span class="operator">-</span><span class="operator">></span>setGradientStops(gradient<span class="operator">.</span>stops()); m_renderer<span class="operator">-</span><span class="operator">></span>hoverPoints()<span class="operator">-</span><span class="operator">></span>setPoints(logicalStops); m_renderer<span class="operator">-</span><span class="operator">></span>setGradientStops(gradient<span class="operator">.</span>stops()); updatePresetName(); } GradientRenderer<span class="operator">::</span>GradientRenderer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : ArthurFrame(parent) { m_hoverPoints <span class="operator">=</span> <span class="keyword">new</span> HoverPoints(<span class="keyword">this</span><span class="operator">,</span> HoverPoints<span class="operator">::</span>CircleShape); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setPointSize(<span class="type"><a href="../qtcore/qsize.html">QSize</a></span>(<span class="number">20</span><span class="operator">,</span> <span class="number">20</span>)); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setConnectionType(HoverPoints<span class="operator">::</span>NoConnection); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setEditable(<span class="keyword">false</span>); <span class="type"><a href="../qtcore/qvector.html">QVector</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span><span class="operator">></span> points; points <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(<span class="number">100</span><span class="operator">,</span> <span class="number">100</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(<span class="number">200</span><span class="operator">,</span> <span class="number">200</span>); m_hoverPoints<span class="operator">-</span><span class="operator">></span>setPoints(points); m_spread <span class="operator">=</span> <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span><span class="operator">::</span>PadSpread; m_gradientType <span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LinearGradientPattern; } <span class="type">void</span> GradientRenderer<span class="operator">::</span>setGradientStops(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qgradient.html#QGradientStops-typedef">QGradientStops</a></span> <span class="operator">&</span>stops) { m_stops <span class="operator">=</span> stops; update(); } <span class="type">void</span> GradientRenderer<span class="operator">::</span>mousePressEvent(<span class="type"><a href="../qtgui/qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>) { setDescriptionEnabled(<span class="keyword">false</span>); } <span class="type">void</span> GradientRenderer<span class="operator">::</span>paint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> <span class="operator">*</span>p) { <span class="type"><a href="../qtgui/qpolygonf.html">QPolygonF</a></span> pts <span class="operator">=</span> m_hoverPoints<span class="operator">-</span><span class="operator">></span>points(); <span class="type"><a href="../qtgui/qgradient.html">QGradient</a></span> g; <span class="keyword">if</span> (m_gradientType <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>LinearGradientPattern) { g <span class="operator">=</span> <span class="type"><a href="../qtgui/qlineargradient.html">QLinearGradient</a></span>(pts<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">,</span> pts<span class="operator">.</span>at(<span class="number">1</span>)); } <span class="keyword">else</span> <span class="keyword">if</span> (m_gradientType <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>RadialGradientPattern) { g <span class="operator">=</span> <span class="type"><a href="../qtgui/qradialgradient.html">QRadialGradient</a></span>(pts<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">,</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(width()<span class="operator">,</span> height()) <span class="operator">/</span> <span class="number">3.0</span><span class="operator">,</span> pts<span class="operator">.</span>at(<span class="number">1</span>)); } <span class="keyword">else</span> { <span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span> l(pts<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">,</span> pts<span class="operator">.</span>at(<span class="number">1</span>)); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> angle <span class="operator">=</span> l<span class="operator">.</span>angle(<span class="type"><a href="../qtcore/qlinef.html">QLineF</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>)); <span class="keyword">if</span> (l<span class="operator">.</span>dy() <span class="operator">></span> <span class="number">0</span>) angle <span class="operator">=</span> <span class="number">360</span> <span class="operator">-</span> angle; g <span class="operator">=</span> <span class="type"><a href="../qtgui/qconicalgradient.html">QConicalGradient</a></span>(pts<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">,</span> angle); } <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> m_stops<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) g<span class="operator">.</span>setColorAt(m_stops<span class="operator">.</span>at(i)<span class="operator">.</span>first<span class="operator">,</span> m_stops<span class="operator">.</span>at(i)<span class="operator">.</span>second); g<span class="operator">.</span>setSpread(m_spread); p<span class="operator">-</span><span class="operator">></span>setBrush(g); p<span class="operator">-</span><span class="operator">></span>setPen(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>NoPen); p<span class="operator">-</span><span class="operator">></span>drawRect(rect()); } </pre> </div> <!-- @@@painting/gradients/gradients.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>