485 lines
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HTML
485 lines
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<h1 class="title">imagewidget.cpp Example File</h1>
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<span class="small-subtitle">gestures/imagegestures/imagewidget.cpp</span>
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<!-- $$$gestures/imagegestures/imagewidget.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include "imagewidget.h"</span>
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<span class="preprocessor">#include <QtGui></span>
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<span class="type">bool</span> ImageWidget<span class="operator">::</span>verbose <span class="operator">=</span> <span class="keyword">false</span>;
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ImageWidget<span class="operator">::</span>ImageWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
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: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span>
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position(<span class="number">0</span>)<span class="operator">,</span>
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horizontalOffset(<span class="number">0</span>)<span class="operator">,</span>
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verticalOffset(<span class="number">0</span>)<span class="operator">,</span>
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rotationAngle(<span class="number">0</span>)<span class="operator">,</span>
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scaleFactor(<span class="number">1</span>)<span class="operator">,</span>
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currentStepScaleFactor(<span class="number">1</span>)
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{
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setMinimumSize(<span class="type"><a href="qsize.html">QSize</a></span>(<span class="number">100</span><span class="operator">,</span><span class="number">100</span>));
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}
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<span class="type">void</span> ImageWidget<span class="operator">::</span>grabGestures(<span class="keyword">const</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureType<span class="operator">></span> <span class="operator">&</span>gestures)
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{
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foreach (<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureType gesture<span class="operator">,</span> gestures)
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grabGesture(gesture);
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}
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<span class="type">bool</span> ImageWidget<span class="operator">::</span>event(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>event)
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{
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<span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>Gesture)
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<span class="keyword">return</span> gestureEvent(<span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qgestureevent.html">QGestureEvent</a></span><span class="operator">*</span><span class="operator">></span>(event));
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<span class="keyword">return</span> <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>event(event);
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}
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<span class="type">void</span> ImageWidget<span class="operator">::</span>paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span><span class="operator">*</span>)
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{
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<span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="keyword">this</span>);
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<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> iw <span class="operator">=</span> currentImage<span class="operator">.</span>width();
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<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> ih <span class="operator">=</span> currentImage<span class="operator">.</span>height();
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<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> wh <span class="operator">=</span> height();
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<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> ww <span class="operator">=</span> width();
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p<span class="operator">.</span>translate(ww<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> wh<span class="operator">/</span><span class="number">2</span>);
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p<span class="operator">.</span>translate(horizontalOffset<span class="operator">,</span> verticalOffset);
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p<span class="operator">.</span>rotate(rotationAngle);
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p<span class="operator">.</span>scale(currentStepScaleFactor <span class="operator">*</span> scaleFactor<span class="operator">,</span> currentStepScaleFactor <span class="operator">*</span> scaleFactor);
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p<span class="operator">.</span>translate(<span class="operator">-</span>iw<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>ih<span class="operator">/</span><span class="number">2</span>);
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p<span class="operator">.</span>drawImage(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> currentImage);
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}
|
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<span class="type">void</span> ImageWidget<span class="operator">::</span>mouseDoubleClickEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>)
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{
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rotationAngle <span class="operator">=</span> <span class="number">0</span>;
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scaleFactor <span class="operator">=</span> <span class="number">1</span>;
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currentStepScaleFactor <span class="operator">=</span> <span class="number">1</span>;
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verticalOffset <span class="operator">=</span> <span class="number">0</span>;
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horizontalOffset <span class="operator">=</span> <span class="number">0</span>;
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update();
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<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
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<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"reset on mouse double click"</span>;
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}
|
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<span class="type">bool</span> ImageWidget<span class="operator">::</span>gestureEvent(<span class="type"><a href="qgestureevent.html">QGestureEvent</a></span> <span class="operator">*</span>event)
|
|
{
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"gestureEvent():"</span> <span class="operator"><</span><span class="operator"><</span> event<span class="operator">-</span><span class="operator">></span>gestures()<span class="operator">.</span>size();
|
|
<span class="keyword">if</span> (<span class="type"><a href="qgesture.html">QGesture</a></span> <span class="operator">*</span>swipe <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>gesture(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SwipeGesture))
|
|
swipeTriggered(<span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qswipegesture.html">QSwipeGesture</a></span> <span class="operator">*</span><span class="operator">></span>(swipe));
|
|
<span class="keyword">else</span> <span class="keyword">if</span> (<span class="type"><a href="qgesture.html">QGesture</a></span> <span class="operator">*</span>pan <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>gesture(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PanGesture))
|
|
panTriggered(<span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qpangesture.html">QPanGesture</a></span> <span class="operator">*</span><span class="operator">></span>(pan));
|
|
<span class="keyword">if</span> (<span class="type"><a href="qgesture.html">QGesture</a></span> <span class="operator">*</span>pinch <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>gesture(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PinchGesture))
|
|
pinchTriggered(<span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qpinchgesture.html">QPinchGesture</a></span> <span class="operator">*</span><span class="operator">></span>(pinch));
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>panTriggered(<span class="type"><a href="qpangesture.html">QPanGesture</a></span> <span class="operator">*</span>gesture)
|
|
{
|
|
<span class="preprocessor">#ifndef QT_NO_CURSOR</span>
|
|
<span class="keyword">switch</span> (gesture<span class="operator">-</span><span class="operator">></span>state()) {
|
|
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureStarted:
|
|
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureUpdated:
|
|
setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SizeAllCursor);
|
|
<span class="keyword">break</span>;
|
|
<span class="keyword">default</span>:
|
|
setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ArrowCursor);
|
|
}
|
|
<span class="preprocessor">#endif</span>
|
|
<span class="type"><a href="qpointf.html">QPointF</a></span> delta <span class="operator">=</span> gesture<span class="operator">-</span><span class="operator">></span>delta();
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"panTriggered():"</span> <span class="operator"><</span><span class="operator"><</span> delta;
|
|
horizontalOffset <span class="operator">+</span><span class="operator">=</span> delta<span class="operator">.</span>x();
|
|
verticalOffset <span class="operator">+</span><span class="operator">=</span> delta<span class="operator">.</span>y();
|
|
update();
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>pinchTriggered(<span class="type"><a href="qpinchgesture.html">QPinchGesture</a></span> <span class="operator">*</span>gesture)
|
|
{
|
|
<span class="type"><a href="qpinchgesture.html">QPinchGesture</a></span><span class="operator">::</span>ChangeFlags changeFlags <span class="operator">=</span> gesture<span class="operator">-</span><span class="operator">></span>changeFlags();
|
|
<span class="keyword">if</span> (changeFlags <span class="operator">&</span> <span class="type"><a href="qpinchgesture.html">QPinchGesture</a></span><span class="operator">::</span>RotationAngleChanged) {
|
|
<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> value <span class="operator">=</span> gesture<span class="operator">-</span><span class="operator">></span>property(<span class="string">"rotationAngle"</span>)<span class="operator">.</span>toReal();
|
|
<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> lastValue <span class="operator">=</span> gesture<span class="operator">-</span><span class="operator">></span>property(<span class="string">"lastRotationAngle"</span>)<span class="operator">.</span>toReal();
|
|
<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> rotationAngleDelta <span class="operator">=</span> value <span class="operator">-</span> lastValue;
|
|
rotationAngle <span class="operator">+</span><span class="operator">=</span> rotationAngleDelta;
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"pinchTriggered(): rotation by"</span> <span class="operator"><</span><span class="operator"><</span> rotationAngleDelta <span class="operator"><</span><span class="operator"><</span> rotationAngle;
|
|
}
|
|
<span class="keyword">if</span> (changeFlags <span class="operator">&</span> <span class="type"><a href="qpinchgesture.html">QPinchGesture</a></span><span class="operator">::</span>ScaleFactorChanged) {
|
|
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> value <span class="operator">=</span> gesture<span class="operator">-</span><span class="operator">></span>property(<span class="string">"scaleFactor"</span>)<span class="operator">.</span>toReal();
|
|
currentStepScaleFactor <span class="operator">=</span> value;
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"pinchTriggered(): "</span> <span class="operator"><</span><span class="operator"><</span> currentStepScaleFactor;
|
|
}
|
|
<span class="keyword">if</span> (gesture<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureFinished) {
|
|
scaleFactor <span class="operator">*</span><span class="operator">=</span> currentStepScaleFactor;
|
|
currentStepScaleFactor <span class="operator">=</span> <span class="number">1</span>;
|
|
}
|
|
update();
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>swipeTriggered(<span class="type"><a href="qswipegesture.html">QSwipeGesture</a></span> <span class="operator">*</span>gesture)
|
|
{
|
|
<span class="keyword">if</span> (gesture<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>GestureFinished) {
|
|
<span class="keyword">if</span> (gesture<span class="operator">-</span><span class="operator">></span>horizontalDirection() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qswipegesture.html">QSwipeGesture</a></span><span class="operator">::</span>Left
|
|
<span class="operator">|</span><span class="operator">|</span> gesture<span class="operator">-</span><span class="operator">></span>verticalDirection() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qswipegesture.html">QSwipeGesture</a></span><span class="operator">::</span>Up) {
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"swipeTriggered(): swipe to previous"</span>;
|
|
goPrevImage();
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"swipeTriggered(): swipe to next"</span>;
|
|
goNextImage();
|
|
}
|
|
update();
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>resizeEvent(<span class="type"><a href="qresizeevent.html">QResizeEvent</a></span><span class="operator">*</span>)
|
|
{
|
|
update();
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>openDirectory(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>path)
|
|
{
|
|
<span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>path <span class="operator">=</span> path;
|
|
<span class="type"><a href="qdir.html">QDir</a></span> dir(path);
|
|
<span class="type"><a href="qstringlist.html">QStringList</a></span> nameFilters;
|
|
nameFilters <span class="operator"><</span><span class="operator"><</span> <span class="string">"*.jpg"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"*.png"</span>;
|
|
files <span class="operator">=</span> dir<span class="operator">.</span>entryList(nameFilters<span class="operator">,</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Files<span class="operator">|</span><span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Readable<span class="operator">,</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>Name);
|
|
|
|
position <span class="operator">=</span> <span class="number">0</span>;
|
|
goToImage(<span class="number">0</span>);
|
|
update();
|
|
}
|
|
|
|
<span class="type"><a href="qimage.html">QImage</a></span> ImageWidget<span class="operator">::</span>loadImage(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>fileName)
|
|
{
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> position <span class="operator"><</span><span class="operator"><</span> files <span class="operator"><</span><span class="operator"><</span> fileName;
|
|
<span class="type"><a href="qimagereader.html">QImageReader</a></span> reader(fileName);
|
|
<span class="keyword">if</span> (ImageWidget<span class="operator">::</span>verbose)
|
|
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"loading"</span> <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>toNativeSeparators(fileName) <span class="operator"><</span><span class="operator"><</span> position <span class="operator"><</span><span class="operator"><</span> <span class="char">'/'</span> <span class="operator"><</span><span class="operator"><</span> files<span class="operator">.</span>size();
|
|
<span class="keyword">if</span> (<span class="operator">!</span>reader<span class="operator">.</span>canRead()) {
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>toNativeSeparators(fileName) <span class="operator"><</span><span class="operator"><</span> <span class="string">": can't load image"</span>;
|
|
<span class="keyword">return</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
}
|
|
|
|
<span class="type"><a href="qimage.html">QImage</a></span> image;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>reader<span class="operator">.</span>read(<span class="operator">&</span>image)) {
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="type"><a href="qdir.html">QDir</a></span><span class="operator">::</span>toNativeSeparators(fileName) <span class="operator"><</span><span class="operator"><</span> <span class="string">": corrupted image: "</span> <span class="operator"><</span><span class="operator"><</span> reader<span class="operator">.</span>errorString();
|
|
<span class="keyword">return</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
}
|
|
<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> maximumSize(<span class="number">2000</span><span class="operator">,</span> <span class="number">2000</span>); <span class="comment">// Reduce in case someone has large photo images.</span>
|
|
<span class="keyword">if</span> (image<span class="operator">.</span>size()<span class="operator">.</span>width() <span class="operator">></span> maximumSize<span class="operator">.</span>width() <span class="operator">|</span><span class="operator">|</span> image<span class="operator">.</span>height() <span class="operator">></span> maximumSize<span class="operator">.</span>height())
|
|
image <span class="operator">=</span> image<span class="operator">.</span>scaled(maximumSize<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation);
|
|
<span class="keyword">return</span> image;
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>goNextImage()
|
|
{
|
|
<span class="keyword">if</span> (files<span class="operator">.</span>isEmpty())
|
|
<span class="keyword">return</span>;
|
|
|
|
<span class="keyword">if</span> (position <span class="operator"><</span> files<span class="operator">.</span>size()<span class="operator">-</span><span class="number">1</span>) {
|
|
<span class="operator">+</span><span class="operator">+</span>position;
|
|
prevImage <span class="operator">=</span> currentImage;
|
|
currentImage <span class="operator">=</span> nextImage;
|
|
<span class="keyword">if</span> (position<span class="operator">+</span><span class="number">1</span> <span class="operator"><</span> files<span class="operator">.</span>size())
|
|
nextImage <span class="operator">=</span> loadImage(path<span class="operator">+</span>QLatin1String(<span class="string">"/"</span>)<span class="operator">+</span>files<span class="operator">.</span>at(position<span class="operator">+</span><span class="number">1</span>));
|
|
<span class="keyword">else</span>
|
|
nextImage <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
}
|
|
update();
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>goPrevImage()
|
|
{
|
|
<span class="keyword">if</span> (files<span class="operator">.</span>isEmpty())
|
|
<span class="keyword">return</span>;
|
|
|
|
<span class="keyword">if</span> (position <span class="operator">></span> <span class="number">0</span>) {
|
|
<span class="operator">-</span><span class="operator">-</span>position;
|
|
nextImage <span class="operator">=</span> currentImage;
|
|
currentImage <span class="operator">=</span> prevImage;
|
|
<span class="keyword">if</span> (position <span class="operator">></span> <span class="number">0</span>)
|
|
prevImage <span class="operator">=</span> loadImage(path<span class="operator">+</span>QLatin1String(<span class="string">"/"</span>)<span class="operator">+</span>files<span class="operator">.</span>at(position<span class="operator">-</span><span class="number">1</span>));
|
|
<span class="keyword">else</span>
|
|
prevImage <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
}
|
|
update();
|
|
}
|
|
|
|
<span class="type">void</span> ImageWidget<span class="operator">::</span>goToImage(<span class="type">int</span> index)
|
|
{
|
|
<span class="keyword">if</span> (files<span class="operator">.</span>isEmpty())
|
|
<span class="keyword">return</span>;
|
|
|
|
<span class="keyword">if</span> (index <span class="operator"><</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> index <span class="operator">></span><span class="operator">=</span> files<span class="operator">.</span>size()) {
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"goToImage: invalid index: "</span> <span class="operator"><</span><span class="operator"><</span> index;
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="keyword">if</span> (index <span class="operator">=</span><span class="operator">=</span> position<span class="operator">+</span><span class="number">1</span>) {
|
|
goNextImage();
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="keyword">if</span> (position <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> index <span class="operator">=</span><span class="operator">=</span> position<span class="operator">-</span><span class="number">1</span>) {
|
|
goPrevImage();
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
position <span class="operator">=</span> index;
|
|
|
|
<span class="keyword">if</span> (index <span class="operator">></span> <span class="number">0</span>)
|
|
prevImage <span class="operator">=</span> loadImage(path<span class="operator">+</span>QLatin1String(<span class="string">"/"</span>)<span class="operator">+</span>files<span class="operator">.</span>at(position<span class="operator">-</span><span class="number">1</span>));
|
|
<span class="keyword">else</span>
|
|
prevImage <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
currentImage <span class="operator">=</span> loadImage(path<span class="operator">+</span>QLatin1String(<span class="string">"/"</span>)<span class="operator">+</span>files<span class="operator">.</span>at(position));
|
|
<span class="keyword">if</span> (position<span class="operator">+</span><span class="number">1</span> <span class="operator"><</span> files<span class="operator">.</span>size())
|
|
nextImage <span class="operator">=</span> loadImage(path<span class="operator">+</span>QLatin1String(<span class="string">"/"</span>)<span class="operator">+</span>files<span class="operator">.</span>at(position<span class="operator">+</span><span class="number">1</span>));
|
|
<span class="keyword">else</span>
|
|
nextImage <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>();
|
|
update();
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@gestures/imagegestures/imagewidget.cpp -->
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="ft">
|
|
<span></span>
|
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</div>
|
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</div>
|
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<div class="footer">
|
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<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
|
|
Documentation contributions included herein are the copyrights of
|
|
their respective owners.</p>
|
|
<br />
|
|
<p>
|
|
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.</p>
|
|
<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
|
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<br />
|
|
<p>
|
|
Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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