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<h1 class="title">clip.qml Example File</h1>
<span class="subtitle">canvas/clip/clip.qml</span>
<!-- $$$canvas/clip/clip.qml-description -->
<div class="descr"> <a name="details"></a>
<pre class="qml">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples 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.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
**
****************************************************************************/</span>
import QtQuick 2.0
import "../contents"
import "../../shared"
<span class="type"><a href="qml-qtquick-item.html">Item</a></span> {
<span class="name">id</span>:<span class="name">container</span>
<span class="name">width</span>: <span class="number">320</span>
<span class="name">height</span>: <span class="number">480</span>
<span class="type"><a href="qml-qtquick-column.html">Column</a></span> {
<span class="name">spacing</span>:<span class="number">5</span>
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">anchors</span>.topMargin: <span class="number">12</span>
<span class="type"><a href="qml-qtquick-text.html">Text</a></span> {
<span class="name">font</span>.pointSize: <span class="number">24</span>
<span class="name">font</span>.bold: <span class="number">true</span>
<span class="name">text</span>: <span class="string">"Squircle with Clip"</span>
<span class="name">anchors</span>.horizontalCenter: <span class="name">parent</span>.<span class="name">horizontalCenter</span>
<span class="name">color</span>: <span class="string">"#777"</span>
}
<span class="type"><a href="qml-qtquick-canvas.html">Canvas</a></span> {
<span class="name">id</span>: <span class="name">canvas</span>
<span class="name">width</span>: <span class="number">320</span>
<span class="name">height</span>: <span class="number">280</span>
property <span class="type">color</span> <span class="name">strokeStyle</span>: <span class="name">Qt</span>.<span class="name">darker</span>(<span class="name">fillStyle</span>, <span class="number">1.2</span>)
property <span class="type">color</span> <span class="name">fillStyle</span>:<span class="string">"#14aaff"</span> <span class="comment">// green</span>
property <span class="type">int</span> <span class="name">lineWidth</span>:<span class="number">2</span>
property <span class="type">int</span> <span class="name">nSize</span>:<span class="name">nCtrl</span>.<span class="name">value</span>
property <span class="type">real</span> <span class="name">radius</span>:<span class="name">rCtrl</span>.<span class="name">value</span>
property <span class="type">bool</span> <span class="name">fill</span>:<span class="number">true</span>
property <span class="type">bool</span> <span class="name">stroke</span>:<span class="number">false</span>
property <span class="type">real</span> <span class="name">px</span>: <span class="name">width</span><span class="operator">/</span><span class="number">2</span>
property <span class="type">real</span> <span class="name">py</span>: <span class="name">height</span><span class="operator">/</span><span class="number">2</span> <span class="operator">+</span> <span class="number">20</span>
property <span class="type">real</span> <span class="name">alpha</span>: <span class="number">1.0</span>
property <span class="type">string</span> <span class="name">imagefile</span>:<span class="string">"../contents/qt-logo.png"</span>
<span class="name">antialiasing</span>: <span class="number">true</span>
<span class="name">Component</span>.onCompleted:<span class="name">loadImage</span>(<span class="name">canvas</span>.<span class="name">imagefile</span>);
<span class="name">onRadiusChanged</span>:<span class="name">requestPaint</span>();
<span class="name">onLineWidthChanged</span>:<span class="name">requestPaint</span>();
<span class="name">onNSizeChanged</span>:<span class="name">requestPaint</span>();
<span class="name">onFillChanged</span>:<span class="name">requestPaint</span>();
<span class="name">onStrokeChanged</span>:<span class="name">requestPaint</span>();
<span class="name">onImageLoaded</span> : <span class="name">requestPaint</span>();
<span class="name">onPaint</span>: <span class="name">squcirle</span>();
<span class="keyword">function</span> <span class="name">squcirle</span>() {
var <span class="name">ctx</span> = <span class="name">canvas</span>.<span class="name">getContext</span>(<span class="string">"2d"</span>);
var <span class="name">N</span> = <span class="name">canvas</span>.<span class="name">nSize</span>;
var <span class="name">R</span> = <span class="name">canvas</span>.<span class="name">radius</span>;
<span class="name">N</span><span class="operator">=</span><span class="name">Math</span>.<span class="name">abs</span>(<span class="name">N</span>);
var <span class="name">M</span>=<span class="name">N</span>;
<span class="keyword">if</span> (<span class="name">N</span><span class="operator">></span><span class="number">100</span>) <span class="name">M</span><span class="operator">=</span><span class="number">100</span>;
<span class="keyword">if</span> (<span class="name">N</span><span class="operator"><</span><span class="number">0.00000000001</span>) <span class="name">M</span><span class="operator">=</span><span class="number">0.00000000001</span>;
<span class="name">ctx</span>.<span class="name">save</span>();
<span class="name">ctx</span>.<span class="name">globalAlpha</span> <span class="operator">=</span> <span class="name">canvas</span>.<span class="name">alpha</span>;
<span class="name">ctx</span>.<span class="name">fillStyle</span> <span class="operator">=</span> <span class="string">"white"</span>;
<span class="name">ctx</span>.<span class="name">fillRect</span>(<span class="number">0</span>, <span class="number">0</span>, <span class="name">canvas</span>.<span class="name">width</span>, <span class="name">canvas</span>.<span class="name">height</span>);
<span class="name">ctx</span>.<span class="name">strokeStyle</span> <span class="operator">=</span> <span class="name">canvas</span>.<span class="name">strokeStyle</span>;
<span class="name">ctx</span>.<span class="name">fillStyle</span> <span class="operator">=</span> <span class="name">canvas</span>.<span class="name">fillStyle</span>;
<span class="name">ctx</span>.<span class="name">lineWidth</span> <span class="operator">=</span> <span class="name">canvas</span>.<span class="name">lineWidth</span>;
<span class="name">ctx</span>.<span class="name">beginPath</span>();
var <span class="name">i</span> = <span class="number">0</span>, <span class="name">x</span>, <span class="name">y</span>;
<span class="keyword">for</span> (<span class="name">i</span><span class="operator">=</span><span class="number">0</span>; <span class="name">i</span><span class="operator"><</span>(<span class="number">2</span><span class="operator">*</span><span class="name">R</span><span class="operator">+</span><span class="number">1</span>); i++){
<span class="name">x</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">round</span>(<span class="name">i</span><span class="operator">-</span><span class="name">R</span>) <span class="operator">+</span> <span class="name">canvas</span>.<span class="name">px</span>;
<span class="name">y</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">round</span>(<span class="name">Math</span>.<span class="name">pow</span>(<span class="name">Math</span>.<span class="name">abs</span>(<span class="name">Math</span>.<span class="name">pow</span>(<span class="name">R</span>,<span class="name">M</span>)<span class="operator">-</span><span class="name">Math</span>.<span class="name">pow</span>(<span class="name">Math</span>.<span class="name">abs</span>(<span class="name">i</span><span class="operator">-</span><span class="name">R</span>),<span class="name">M</span>)),<span class="number">1</span><span class="operator">/</span><span class="name">M</span>)) <span class="operator">+</span> <span class="name">canvas</span>.<span class="name">py</span>;
<span class="keyword">if</span> (<span class="name">i</span> <span class="operator">==</span> <span class="number">0</span>)
<span class="name">ctx</span>.<span class="name">moveTo</span>(<span class="name">x</span>, <span class="name">y</span>);
<span class="keyword">else</span>
<span class="name">ctx</span>.<span class="name">lineTo</span>(<span class="name">x</span>, <span class="name">y</span>);
}
<span class="keyword">for</span> (<span class="name">i</span><span class="operator">=</span>(<span class="number">2</span><span class="operator">*</span><span class="name">R</span>); <span class="name">i</span><span class="operator"><</span>(<span class="number">4</span><span class="operator">*</span><span class="name">R</span><span class="operator">+</span><span class="number">1</span>); i++){
<span class="name">x</span> <span class="operator">=</span><span class="name">Math</span>.<span class="name">round</span>(<span class="number">3</span><span class="operator">*</span><span class="name">R</span><span class="operator">-</span><span class="name">i</span>)<span class="operator">+</span><span class="name">canvas</span>.<span class="name">px</span>;
<span class="name">y</span> <span class="operator">=</span> <span class="name">Math</span>.<span class="name">round</span>(-<span class="name">Math</span>.<span class="name">pow</span>(<span class="name">Math</span>.<span class="name">abs</span>(<span class="name">Math</span>.<span class="name">pow</span>(<span class="name">R</span>,<span class="name">M</span>)<span class="operator">-</span><span class="name">Math</span>.<span class="name">pow</span>(<span class="name">Math</span>.<span class="name">abs</span>(<span class="number">3</span><span class="operator">*</span><span class="name">R</span><span class="operator">-</span><span class="name">i</span>),<span class="name">M</span>)),<span class="number">1</span><span class="operator">/</span><span class="name">M</span>)) <span class="operator">+</span> <span class="name">canvas</span>.<span class="name">py</span>;
<span class="name">ctx</span>.<span class="name">lineTo</span>(<span class="name">x</span>, <span class="name">y</span>);
}
<span class="name">ctx</span>.<span class="name">closePath</span>();
<span class="keyword">if</span> (<span class="name">canvas</span>.<span class="name">stroke</span>) {
<span class="name">ctx</span>.<span class="name">stroke</span>();
}
<span class="keyword">if</span> (<span class="name">canvas</span>.<span class="name">fill</span>) {
<span class="name">ctx</span>.<span class="name">fill</span>();
}
<span class="name">ctx</span>.<span class="name">clip</span>();
<span class="name">ctx</span>.<span class="name">drawImage</span>(<span class="name">canvas</span>.<span class="name">imagefile</span>, <span class="number">0</span>, <span class="number">0</span>);
<span class="name">ctx</span>.<span class="name">restore</span>();
}
}
}
<span class="type"><a href="qml-qtquick-column.html">Column</a></span> {
<span class="name">id</span>: <span class="name">controls</span>
<span class="name">anchors</span>.bottom: <span class="name">parent</span>.<span class="name">bottom</span>
<span class="name">anchors</span>.bottomMargin: <span class="number">12</span>
<span class="type">Slider</span> {<span class="name">id</span>: <span class="name">nCtrl</span>; <span class="name">min</span>: <span class="number">1</span>; <span class="name">max</span>: <span class="number">10</span>; <span class="name">init</span>: <span class="number">4</span>; <span class="name">name</span>:<span class="string">"N"</span>}
<span class="type">Slider</span> {<span class="name">id</span>: <span class="name">rCtrl</span>; <span class="name">min</span>: <span class="number">30</span>; <span class="name">max</span>: <span class="number">180</span>; <span class="name">init</span>: <span class="number">80</span>; <span class="name">name</span>:<span class="string">"Radius"</span>}
}
}
</pre>
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<!-- @@@canvas/clip/clip.qml -->
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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
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