<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Qt 4.6: sortingbox.cpp Example File (widgets/tooltips/sortingbox.cpp)</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">sortingbox.cpp Example File<br /><span class="small-subtitle">widgets/tooltips/sortingbox.cpp</span> </h1> <pre><span class="comment"> /**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/</span> #include <QtGui> #include <stdlib.h> #include "sortingbox.h" SortingBox::SortingBox() { setMouseTracking(true); setBackgroundRole(QPalette::Base); itemInMotion = 0; newCircleButton = createToolButton(tr("New Circle"), QIcon(":/images/circle.png"), SLOT(createNewCircle())); newSquareButton = createToolButton(tr("New Square"), QIcon(":/images/square.png"), SLOT(createNewSquare())); newTriangleButton = createToolButton(tr("New Triangle"), QIcon(":/images/triangle.png"), SLOT(createNewTriangle())); circlePath.addEllipse(QRect(0, 0, 100, 100)); squarePath.addRect(QRect(0, 0, 100, 100)); qreal x = trianglePath.currentPosition().x(); qreal y = trianglePath.currentPosition().y(); trianglePath.moveTo(x + 120 / 2, y); trianglePath.lineTo(0, 100); trianglePath.lineTo(120, 100); trianglePath.lineTo(x + 120 / 2, y); setWindowTitle(tr("Tool Tips")); resize(500, 300); createShapeItem(circlePath, tr("Circle"), initialItemPosition(circlePath), initialItemColor()); createShapeItem(squarePath, tr("Square"), initialItemPosition(squarePath), initialItemColor()); createShapeItem(trianglePath, tr("Triangle"), initialItemPosition(trianglePath), initialItemColor()); } bool SortingBox::event(QEvent *event) { if (event->type() == QEvent::ToolTip) { QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event); int index = itemAt(helpEvent->pos()); if (index != -1) { QToolTip::showText(helpEvent->globalPos(), shapeItems[index].toolTip()); } else { QToolTip::hideText(); event->ignore(); } return true; } return QWidget::event(event); } void SortingBox::resizeEvent(QResizeEvent * <span class="comment">/* event */</span>) { int margin = style()->pixelMetric(QStyle::PM_DefaultTopLevelMargin); int x = width() - margin; int y = height() - margin; y = updateButtonGeometry(newCircleButton, x, y); y = updateButtonGeometry(newSquareButton, x, y); updateButtonGeometry(newTriangleButton, x, y); } void SortingBox::paintEvent(QPaintEvent * <span class="comment">/* event */</span>) { QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); foreach (ShapeItem shapeItem, shapeItems) { painter.translate(shapeItem.position()); painter.setBrush(shapeItem.color()); painter.drawPath(shapeItem.path()); painter.translate(-shapeItem.position()); } } void SortingBox::mousePressEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) { int index = itemAt(event->pos()); if (index != -1) { itemInMotion = &shapeItems[index]; previousPosition = event->pos(); shapeItems.move(index, shapeItems.size() - 1); update(); } } } void SortingBox::mouseMoveEvent(QMouseEvent *event) { if ((event->buttons() & Qt::LeftButton) && itemInMotion) moveItemTo(event->pos()); } void SortingBox::mouseReleaseEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton && itemInMotion) { moveItemTo(event->pos()); itemInMotion = 0; } } void SortingBox::createNewCircle() { static int count = 1; createShapeItem(circlePath, tr("Circle <%1>").arg(++count), randomItemPosition(), randomItemColor()); } void SortingBox::createNewSquare() { static int count = 1; createShapeItem(squarePath, tr("Square <%1>").arg(++count), randomItemPosition(), randomItemColor()); } void SortingBox::createNewTriangle() { static int count = 1; createShapeItem(trianglePath, tr("Triangle <%1>").arg(++count), randomItemPosition(), randomItemColor()); } int SortingBox::itemAt(const QPoint &pos) { for (int i = shapeItems.size() - 1; i >= 0; --i) { const ShapeItem &item = shapeItems[i]; if (item.path().contains(pos - item.position())) return i; } return -1; } void SortingBox::moveItemTo(const QPoint &pos) { QPoint offset = pos - previousPosition; itemInMotion->setPosition(itemInMotion->position() + offset); previousPosition = pos; update(); } int SortingBox::updateButtonGeometry(QToolButton *button, int x, int y) { QSize size = button->sizeHint(); button->setGeometry(x - size.rwidth(), y - size.rheight(), size.rwidth(), size.rheight()); return y - size.rheight() - style()->pixelMetric(QStyle::PM_DefaultLayoutSpacing); } void SortingBox::createShapeItem(const QPainterPath &path, const QString &toolTip, const QPoint &pos, const QColor &color) { ShapeItem shapeItem; shapeItem.setPath(path); shapeItem.setToolTip(toolTip); shapeItem.setPosition(pos); shapeItem.setColor(color); shapeItems.append(shapeItem); update(); } QToolButton *SortingBox::createToolButton(const QString &toolTip, const QIcon &icon, const char *member) { QToolButton *button = new QToolButton(this); button->setToolTip(toolTip); button->setIcon(icon); button->setIconSize(QSize(32, 32)); connect(button, SIGNAL(clicked()), this, member); return button; } QPoint SortingBox::initialItemPosition(const QPainterPath &path) { int x; int y = (height() - (int)path.controlPointRect().height()) / 2; if (shapeItems.size() == 0) x = ((3 * width()) / 2 - (int)path.controlPointRect().width()) / 2; else x = (width() / shapeItems.size() - (int)path.controlPointRect().width()) / 2; return QPoint(x, y); } QPoint SortingBox::randomItemPosition() { return QPoint(qrand() % (width() - 120), qrand() % (height() - 120)); } QColor SortingBox::initialItemColor() { return QColor::fromHsv(((shapeItems.size() + 1) * 85) % 256, 255, 190); } QColor SortingBox::randomItemColor() { return QColor::fromHsv(qrand() % 256, 255, 190); }</pre> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td> <td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="40%" align="right"><div align="right">Qt 4.6.3</div></td> </tr></table></div></address></body> </html>