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<h1 class="title">pathdeform.cpp Example File</h1>
<span class="small-subtitle">demos/deform/pathdeform.cpp</span>
<!-- $$$demos/deform/pathdeform.cpp-description -->
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<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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
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** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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.
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** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &quot;pathdeform.h&quot;</span>
<span class="preprocessor">#include &lt;QApplication&gt;</span>
<span class="preprocessor">#include &lt;QtDebug&gt;</span>
<span class="preprocessor">#include &lt;QMouseEvent&gt;</span>
<span class="preprocessor">#include &lt;QTimerEvent&gt;</span>
<span class="preprocessor">#include &lt;QLayout&gt;</span>
<span class="preprocessor">#include &lt;QLineEdit&gt;</span>
<span class="preprocessor">#include &lt;QPainter&gt;</span>
<span class="preprocessor">#include &lt;QSlider&gt;</span>
<span class="preprocessor">#include &lt;QLabel&gt;</span>
<span class="preprocessor">#include &lt;QDesktopWidget&gt;</span>
<span class="preprocessor">#include &lt;qmath.h&gt;</span>
PathDeformControls<span class="operator">::</span>PathDeformControls(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> PathDeformRenderer<span class="operator">*</span> renderer<span class="operator">,</span> <span class="type">bool</span> smallScreen)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
m_renderer <span class="operator">=</span> renderer;
<span class="keyword">if</span> (smallScreen)
layoutForSmallScreen();
<span class="keyword">else</span>
layoutForDesktop();
}
<span class="type">void</span> PathDeformControls<span class="operator">::</span>layoutForDesktop()
{
<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">&gt;</span>setTitle(tr(<span class="string">&quot;Controls&quot;</span>));
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>radiusGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup);
radiusGroup<span class="operator">-</span><span class="operator">&gt;</span>setTitle(tr(<span class="string">&quot;Lens Radius&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>radiusSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> radiusGroup);
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">15</span><span class="operator">,</span> <span class="number">150</span>);
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>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);
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>deformGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup);
deformGroup<span class="operator">-</span><span class="operator">&gt;</span>setTitle(tr(<span class="string">&quot;Deformation&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>deformSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> deformGroup);
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>);
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>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);
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>fontSizeGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup);
fontSizeGroup<span class="operator">-</span><span class="operator">&gt;</span>setTitle(tr(<span class="string">&quot;Font Size&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>fontSizeSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> fontSizeGroup);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">16</span><span class="operator">,</span> <span class="number">200</span>);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>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);
<span class="type"><a href="qgroupbox.html">QGroupBox</a></span> <span class="operator">*</span>textGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(mainGroup);
textGroup<span class="operator">-</span><span class="operator">&gt;</span>setTitle(tr(<span class="string">&quot;Text&quot;</span>));
<span class="type"><a href="qlineedit.html">QLineEdit</a></span> <span class="operator">*</span>textInput <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>(textGroup);
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>animateButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(mainGroup);
animateButton<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Animated&quot;</span>));
animateButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
<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">&gt;</span>setText(tr(<span class="string">&quot;Show Source&quot;</span>));
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</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">&gt;</span>setText(tr(<span class="string">&quot;Use OpenGL&quot;</span>));
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>setChecked(m_renderer<span class="operator">-</span><span class="operator">&gt;</span>usesOpenGL());
<span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qglformat.html">QGLFormat</a></span><span class="operator">::</span>hasOpenGL())
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
<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">&gt;</span>setText(tr(<span class="string">&quot;What's This?&quot;</span>));
whatsThisButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
mainGroup<span class="operator">-</span><span class="operator">&gt;</span>setFixedWidth(<span class="number">180</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">&gt;</span>addWidget(radiusGroup);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(deformGroup);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(fontSizeGroup);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(textGroup);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(animateButton);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addStretch(<span class="number">1</span>);
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(enableOpenGLButton);
<span class="preprocessor">#endif</span>
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(showSourceButton);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(whatsThisButton);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>radiusGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(radiusGroup);
radiusGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(radiusSlider);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>deformGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(deformGroup);
deformGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(deformSlider);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>fontSizeGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(fontSizeGroup);
fontSizeGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(fontSizeSlider);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>textGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(textGroup);
textGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(textInput);
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span> mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(mainGroup);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>setMargin(<span class="number">0</span>);
connect(radiusSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setRadius(<span class="type">int</span>)));
connect(deformSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setIntensity(<span class="type">int</span>)));
connect(fontSizeSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setFontSize(<span class="type">int</span>)));
connect(animateButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setAnimated(<span class="type">bool</span>)));
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
connect(enableOpenGLButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(enableOpenGL(<span class="type">bool</span>)));
<span class="preprocessor">#endif</span>
connect(textInput<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setText(<span class="type"><a href="qstring.html">QString</a></span>)));
connect(m_renderer<span class="operator">,</span> SIGNAL(descriptionEnabledChanged(<span class="type">bool</span>))<span class="operator">,</span>
whatsThisButton<span class="operator">,</span> SLOT(setChecked(<span class="type">bool</span>)));
connect(whatsThisButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setDescriptionEnabled(<span class="type">bool</span>)));
connect(showSourceButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(showSource()));
animateButton<span class="operator">-</span><span class="operator">&gt;</span>animateClick();
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">80</span>);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">120</span>);
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">100</span>);
textInput<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Qt&quot;</span>));
}
<span class="type">void</span> PathDeformControls<span class="operator">::</span>layoutForSmallScreen()
{
<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">&gt;</span>setTitle(tr(<span class="string">&quot;Controls&quot;</span>));
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>radiusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(mainGroup);
radiusLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Lens Radius:&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>radiusSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> mainGroup);
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">15</span><span class="operator">,</span> <span class="number">150</span>);
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>deformLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(mainGroup);
deformLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Deformation:&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>deformSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> mainGroup);
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="operator">-</span><span class="number">100</span><span class="operator">,</span> <span class="number">100</span>);
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
<span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>fontSizeLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(mainGroup);
fontSizeLabel<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Font Size:&quot;</span>));
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>fontSizeSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> mainGroup);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">16</span><span class="operator">,</span> <span class="number">200</span>);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>animateButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;Animated&quot;</span>)<span class="operator">,</span> mainGroup);
animateButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(<span class="keyword">true</span>);
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</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">&gt;</span>setText(tr(<span class="string">&quot;Use OpenGL&quot;</span>));
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>setCheckable(mainGroup);
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>setChecked(m_renderer<span class="operator">-</span><span class="operator">&gt;</span>usesOpenGL());
<span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qglformat.html">QGLFormat</a></span><span class="operator">::</span>hasOpenGL())
enableOpenGLButton<span class="operator">-</span><span class="operator">&gt;</span>hide();
<span class="preprocessor">#endif</span>
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;Quit&quot;</span>)<span class="operator">,</span> mainGroup);
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>okButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">&quot;OK&quot;</span>)<span class="operator">,</span> mainGroup);
<span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>mainGroupLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>(mainGroup);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>setMargin(<span class="number">0</span>);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(radiusLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignRight);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(radiusSlider<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(deformLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignRight);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(deformSlider<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(fontSizeLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignRight);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(fontSizeSlider<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span>);
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(animateButton<span class="operator">,</span> <span class="number">3</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">2</span>);
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
mainGroupLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(enableOpenGLButton<span class="operator">,</span> <span class="number">4</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">2</span>);
<span class="preprocessor">#endif</span>
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(mainGroup);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addStretch(<span class="number">1</span>);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(okButton);
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(quitButton);
connect(quitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(emitQuitSignal()));
connect(okButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(emitOkSignal()));
connect(radiusSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setRadius(<span class="type">int</span>)));
connect(deformSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setIntensity(<span class="type">int</span>)));
connect(fontSizeSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setFontSize(<span class="type">int</span>)));
connect(animateButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(setAnimated(<span class="type">bool</span>)));
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
connect(enableOpenGLButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> m_renderer<span class="operator">,</span> SLOT(enableOpenGL(<span class="type">bool</span>)));
<span class="preprocessor">#endif</span>
animateButton<span class="operator">-</span><span class="operator">&gt;</span>animateClick();
deformSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">80</span>);
fontSizeSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<span class="number">120</span>);
<span class="type"><a href="qrect.html">QRect</a></span> screen_size <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">&gt;</span>screenGeometry();
radiusSlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(<a href="qtglobal.html#qMin">qMin</a>(screen_size<span class="operator">.</span>width()<span class="operator">,</span> screen_size<span class="operator">.</span>height())<span class="operator">/</span><span class="number">5</span>);
m_renderer<span class="operator">-</span><span class="operator">&gt;</span>setText(tr(<span class="string">&quot;Qt&quot;</span>));
}
<span class="type">void</span> PathDeformControls<span class="operator">::</span>emitQuitSignal()
{ <span class="keyword">emit</span> quitPressed(); }
<span class="type">void</span> PathDeformControls<span class="operator">::</span>emitOkSignal()
{ <span class="keyword">emit</span> okPressed(); }
PathDeformWidget<span class="operator">::</span>PathDeformWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent<span class="operator">,</span> <span class="type">bool</span> smallScreen)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
setWindowTitle(tr(<span class="string">&quot;Vector Deformation&quot;</span>));
m_renderer <span class="operator">=</span> <span class="keyword">new</span> PathDeformRenderer(<span class="keyword">this</span><span class="operator">,</span> smallScreen);
m_renderer<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding);
<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">&gt;</span>addWidget(m_renderer);
m_controls <span class="operator">=</span> <span class="keyword">new</span> PathDeformControls(<span class="number">0</span><span class="operator">,</span> m_renderer<span class="operator">,</span> smallScreen);
m_controls<span class="operator">-</span><span class="operator">&gt;</span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Minimum);
<span class="keyword">if</span> (<span class="operator">!</span>smallScreen)
mainLayout<span class="operator">-</span><span class="operator">&gt;</span>addWidget(m_controls);
m_renderer<span class="operator">-</span><span class="operator">&gt;</span>loadSourceFile(<span class="string">&quot;:res/deform/pathdeform.cpp&quot;</span>);
m_renderer<span class="operator">-</span><span class="operator">&gt;</span>loadDescription(<span class="string">&quot;:res/deform/pathdeform.html&quot;</span>);
m_renderer<span class="operator">-</span><span class="operator">&gt;</span>setDescriptionEnabled(<span class="keyword">false</span>);
connect(m_renderer<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showControls()));
connect(m_controls<span class="operator">,</span> SIGNAL(okPressed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(hideControls()));
connect(m_controls<span class="operator">,</span> SIGNAL(quitPressed())<span class="operator">,</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>instance()<span class="operator">,</span> SLOT(quit()));
}
<span class="type">void</span> PathDeformWidget<span class="operator">::</span>showControls()
{
m_controls<span class="operator">-</span><span class="operator">&gt;</span>showFullScreen();
}
<span class="type">void</span> PathDeformWidget<span class="operator">::</span>hideControls()
{
m_controls<span class="operator">-</span><span class="operator">&gt;</span>hide();
}
<span class="type">void</span> PathDeformWidget<span class="operator">::</span>setStyle( <span class="type"><a href="qstyle.html">QStyle</a></span> <span class="operator">*</span> style )
{
<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>setStyle(style);
<span class="keyword">if</span> (m_controls <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>)
{
m_controls<span class="operator">-</span><span class="operator">&gt;</span>setStyle(style);
<span class="type"><a href="qlist.html">QList</a></span><span class="operator">&lt;</span><span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span><span class="operator">&gt;</span> widgets <span class="operator">=</span> m_controls<span class="operator">-</span><span class="operator">&gt;</span>findChildren<span class="operator">&lt;</span><span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span><span class="operator">&gt;</span>();
foreach (<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>w<span class="operator">,</span> widgets)
w<span class="operator">-</span><span class="operator">&gt;</span>setStyle(style);
}
}
<span class="keyword">static</span> <span class="keyword">inline</span> <span class="type"><a href="qrect.html">QRect</a></span> circle_bounds(<span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&amp;</span>center<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> compensation)
{
<span class="keyword">return</span> <span class="type"><a href="qrect.html">QRect</a></span>(<a href="qtglobal.html#qRound">qRound</a>(center<span class="operator">.</span>x() <span class="operator">-</span> radius <span class="operator">-</span> compensation)<span class="operator">,</span>
<a href="qtglobal.html#qRound">qRound</a>(center<span class="operator">.</span>y() <span class="operator">-</span> radius <span class="operator">-</span> compensation)<span class="operator">,</span>
<a href="qtglobal.html#qRound">qRound</a>((radius <span class="operator">+</span> compensation) <span class="operator">*</span> <span class="number">2</span>)<span class="operator">,</span>
<a href="qtglobal.html#qRound">qRound</a>((radius <span class="operator">+</span> compensation) <span class="operator">*</span> <span class="number">2</span>));
}
<span class="keyword">const</span> <span class="type">int</span> LENS_EXTENT <span class="operator">=</span> <span class="number">10</span>;
PathDeformRenderer<span class="operator">::</span>PathDeformRenderer(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget<span class="operator">,</span> <span class="type">bool</span> smallScreen)
: ArthurFrame(widget)
{
m_radius <span class="operator">=</span> <span class="number">100</span>;
m_pos <span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(m_radius<span class="operator">,</span> m_radius);
m_direction <span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">1</span><span class="operator">,</span> <span class="number">1</span>);
m_fontSize <span class="operator">=</span> <span class="number">24</span>;
m_animated <span class="operator">=</span> <span class="keyword">true</span>;
m_repaintTimer<span class="operator">.</span>start(<span class="number">25</span><span class="operator">,</span> <span class="keyword">this</span>);
m_repaintTracker<span class="operator">.</span>start();
m_intensity <span class="operator">=</span> <span class="number">100</span>;
m_smallScreen <span class="operator">=</span> smallScreen;
<span class="comment">// m_fpsTimer.start(1000, this);</span>
<span class="comment">// m_fpsCounter = 0;</span>
generateLensPixmap();
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>setText(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>text)
{
m_text <span class="operator">=</span> text;
<span class="type"><a href="qfont.html">QFont</a></span> f(<span class="string">&quot;times new roman,utopia&quot;</span>);
f<span class="operator">.</span>setStyleStrategy(<span class="type"><a href="qfont.html">QFont</a></span><span class="operator">::</span>ForceOutline);
f<span class="operator">.</span>setPointSize(m_fontSize);
f<span class="operator">.</span>setStyleHint(<span class="type"><a href="qfont.html">QFont</a></span><span class="operator">::</span>Times);
<span class="type"><a href="qfontmetrics.html">QFontMetrics</a></span> fm(f);
m_paths<span class="operator">.</span>clear();
m_pathBounds <span class="operator">=</span> <span class="type"><a href="qrect.html">QRect</a></span>();
<span class="type"><a href="qpointf.html">QPointF</a></span> advance(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
<span class="type">bool</span> do_quick <span class="operator">=</span> <span class="keyword">true</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">&lt;</span>text<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">if</span> (text<span class="operator">.</span>at(i)<span class="operator">.</span>unicode() <span class="operator">&gt;</span><span class="operator">=</span> <span class="number">0x4ff</span> <span class="operator">&amp;</span><span class="operator">&amp;</span> text<span class="operator">.</span>at(i)<span class="operator">.</span>unicode() <span class="operator">&lt;</span><span class="operator">=</span> <span class="number">0x1e00</span>) {
do_quick <span class="operator">=</span> <span class="keyword">false</span>;
<span class="keyword">break</span>;
}
}
<span class="keyword">if</span> (do_quick) {
<span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator">&lt;</span>text<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addText(advance<span class="operator">,</span> f<span class="operator">,</span> text<span class="operator">.</span>mid(i<span class="operator">,</span> <span class="number">1</span>));
m_pathBounds <span class="operator">|</span><span class="operator">=</span> path<span class="operator">.</span>boundingRect();
m_paths <span class="operator">&lt;</span><span class="operator">&lt;</span> path;
advance <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(fm<span class="operator">.</span>width(text<span class="operator">.</span>mid(i<span class="operator">,</span> <span class="number">1</span>))<span class="operator">,</span> <span class="number">0</span>);
}
} <span class="keyword">else</span> {
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addText(advance<span class="operator">,</span> f<span class="operator">,</span> text);
m_pathBounds <span class="operator">|</span><span class="operator">=</span> path<span class="operator">.</span>boundingRect();
m_paths <span class="operator">&lt;</span><span class="operator">&lt;</span> path;
}
<span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator">&lt;</span>m_paths<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i)
m_paths<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">=</span> m_paths<span class="operator">[</span>i<span class="operator">]</span> <span class="operator">*</span> <span class="type"><a href="qmatrix.html">QMatrix</a></span>(<span class="number">1</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">1</span><span class="operator">,</span> <span class="operator">-</span>m_pathBounds<span class="operator">.</span>x()<span class="operator">,</span> <span class="operator">-</span>m_pathBounds<span class="operator">.</span>y());
update();
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>generateLensPixmap()
{
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> rad <span class="operator">=</span> m_radius <span class="operator">+</span> LENS_EXTENT;
<span class="type"><a href="qrect.html">QRect</a></span> bounds <span class="operator">=</span> circle_bounds(<span class="type"><a href="qpointf.html">QPointF</a></span>()<span class="operator">,</span> rad<span class="operator">,</span> <span class="number">0</span>);
<span class="type"><a href="qpainter.html">QPainter</a></span> painter;
<span class="keyword">if</span> (preferImage()) {
m_lens_image <span class="operator">=</span> <span class="type"><a href="qimage.html">QImage</a></span>(bounds<span class="operator">.</span>size()<span class="operator">,</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied);
m_lens_image<span class="operator">.</span>fill(<span class="number">0</span>);
painter<span class="operator">.</span>begin(<span class="operator">&amp;</span>m_lens_image);
} <span class="keyword">else</span> {
m_lens_pixmap <span class="operator">=</span> <span class="type"><a href="qpixmap.html">QPixmap</a></span>(bounds<span class="operator">.</span>size());
m_lens_pixmap<span class="operator">.</span>fill(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>transparent);
painter<span class="operator">.</span>begin(<span class="operator">&amp;</span>m_lens_pixmap);
}
<span class="type"><a href="qradialgradient.html">QRadialGradient</a></span> gr(rad<span class="operator">,</span> rad<span class="operator">,</span> rad<span class="operator">,</span> <span class="number">3</span> <span class="operator">*</span> rad <span class="operator">/</span> <span class="number">5</span><span class="operator">,</span> <span class="number">3</span> <span class="operator">*</span> rad <span class="operator">/</span> <span class="number">5</span>);
gr<span class="operator">.</span>setColorAt(<span class="number">0.0</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">191</span>));
gr<span class="operator">.</span>setColorAt(<span class="number">0.2</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">255</span><span class="operator">,</span> <span class="number">255</span><span class="operator">,</span> <span class="number">127</span><span class="operator">,</span> <span class="number">191</span>));
gr<span class="operator">.</span>setColorAt(<span class="number">0.9</span><span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">150</span><span class="operator">,</span> <span class="number">150</span><span class="operator">,</span> <span class="number">200</span><span class="operator">,</span> <span class="number">63</span>));
gr<span class="operator">.</span>setColorAt(<span class="number">0.95</span><span class="operator">,</span> <span class="type"><a href="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">127</span>));
gr<span class="operator">.</span>setColorAt(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="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>));
painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing);
painter<span class="operator">.</span>setBrush(gr);
painter<span class="operator">.</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
painter<span class="operator">.</span>drawEllipse(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> bounds<span class="operator">.</span>width()<span class="operator">,</span> bounds<span class="operator">.</span>height());
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>setAnimated(<span class="type">bool</span> animated)
{
m_animated <span class="operator">=</span> animated;
<span class="keyword">if</span> (m_animated) {
<span class="comment">// m_fpsTimer.start(1000, this);</span>
<span class="comment">// m_fpsCounter = 0;</span>
m_repaintTimer<span class="operator">.</span>start(<span class="number">25</span><span class="operator">,</span> <span class="keyword">this</span>);
m_repaintTracker<span class="operator">.</span>start();
} <span class="keyword">else</span> {
<span class="comment">// m_fpsTimer.stop();</span>
m_repaintTimer<span class="operator">.</span>stop();
}
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>e)
{
<span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">&gt;</span>timerId() <span class="operator">=</span><span class="operator">=</span> m_repaintTimer<span class="operator">.</span>timerId()) {
<span class="keyword">if</span> (<span class="type"><a href="qlinef.html">QLineF</a></span>(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span>)<span class="operator">,</span> m_direction)<span class="operator">.</span>length() <span class="operator">&gt;</span> <span class="number">1</span>)
m_direction <span class="operator">*</span><span class="operator">=</span> <span class="number">0.995</span>;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> time <span class="operator">=</span> m_repaintTracker<span class="operator">.</span>restart();
<span class="type"><a href="qrect.html">QRect</a></span> rectBefore <span class="operator">=</span> circle_bounds(m_pos<span class="operator">,</span> m_radius<span class="operator">,</span> m_fontSize);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx <span class="operator">=</span> m_direction<span class="operator">.</span>x();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy <span class="operator">=</span> m_direction<span class="operator">.</span>y();
<span class="keyword">if</span> (time <span class="operator">&gt;</span> <span class="number">0</span>) {
dx <span class="operator">=</span> dx <span class="operator">*</span> time <span class="operator">*</span> <span class="operator">.</span><span class="number">1</span>;
dy <span class="operator">=</span> dy <span class="operator">*</span> time <span class="operator">*</span> <span class="operator">.</span><span class="number">1</span>;
}
m_pos <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(dx<span class="operator">,</span> dy);
<span class="keyword">if</span> (m_pos<span class="operator">.</span>x() <span class="operator">-</span> m_radius <span class="operator">&lt;</span> <span class="number">0</span>) {
m_direction<span class="operator">.</span>setX(<span class="operator">-</span>m_direction<span class="operator">.</span>x());
m_pos<span class="operator">.</span>setX(m_radius);
} <span class="keyword">else</span> <span class="keyword">if</span> (m_pos<span class="operator">.</span>x() <span class="operator">+</span> m_radius <span class="operator">&gt;</span> width()) {
m_direction<span class="operator">.</span>setX(<span class="operator">-</span>m_direction<span class="operator">.</span>x());
m_pos<span class="operator">.</span>setX(width() <span class="operator">-</span> m_radius);
}
<span class="keyword">if</span> (m_pos<span class="operator">.</span>y() <span class="operator">-</span> m_radius <span class="operator">&lt;</span> <span class="number">0</span>) {
m_direction<span class="operator">.</span>setY(<span class="operator">-</span>m_direction<span class="operator">.</span>y());
m_pos<span class="operator">.</span>setY(m_radius);
} <span class="keyword">else</span> <span class="keyword">if</span> (m_pos<span class="operator">.</span>y() <span class="operator">+</span> m_radius <span class="operator">&gt;</span> height()) {
m_direction<span class="operator">.</span>setY(<span class="operator">-</span>m_direction<span class="operator">.</span>y());
m_pos<span class="operator">.</span>setY(height() <span class="operator">-</span> m_radius);
}
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
<span class="keyword">if</span> (usesOpenGL()) {
update();
} <span class="keyword">else</span>
<span class="preprocessor">#endif</span>
{
<span class="type"><a href="qrect.html">QRect</a></span> rectAfter <span class="operator">=</span> circle_bounds(m_pos<span class="operator">,</span> m_radius<span class="operator">,</span> m_fontSize);
update(rectAfter <span class="operator">|</span> rectBefore);
<span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>syncX();
}
}
<span class="comment">// else if (e-&gt;timerId() == m_fpsTimer.timerId()) {</span>
<span class="comment">// printf(&quot;fps: %d\n&quot;, m_fpsCounter);</span>
<span class="comment">// emit frameRate(m_fpsCounter);</span>
<span class="comment">// m_fpsCounter = 0;</span>
<span class="comment">// }</span>
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>mousePressEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e)
{
setDescriptionEnabled(<span class="keyword">false</span>);
m_repaintTimer<span class="operator">.</span>stop();
m_offset <span class="operator">=</span> <span class="type"><a href="qpointf.html">QPointF</a></span>();
<span class="keyword">if</span> (<span class="type"><a href="qlinef.html">QLineF</a></span>(m_pos<span class="operator">,</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos())<span class="operator">.</span>length() <span class="operator">&lt;</span><span class="operator">=</span> m_radius)
m_offset <span class="operator">=</span> m_pos <span class="operator">-</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos();
m_mousePress <span class="operator">=</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos();
<span class="comment">// If we're not running in small screen mode, always assume we're dragging</span>
m_mouseDrag <span class="operator">=</span> <span class="operator">!</span>m_smallScreen;
mouseMoveEvent(e);
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>mouseReleaseEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e)
{
<span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">&gt;</span>buttons() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoButton <span class="operator">&amp;</span><span class="operator">&amp;</span> m_animated) {
m_repaintTimer<span class="operator">.</span>start(<span class="number">10</span><span class="operator">,</span> <span class="keyword">this</span>);
m_repaintTracker<span class="operator">.</span>start();
}
<span class="keyword">if</span> (<span class="operator">!</span>m_mouseDrag <span class="operator">&amp;</span><span class="operator">&amp;</span> m_smallScreen)
<span class="keyword">emit</span> clicked();
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>mouseMoveEvent(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>e)
{
<span class="keyword">if</span> (<span class="operator">!</span>m_mouseDrag <span class="operator">&amp;</span><span class="operator">&amp;</span> (<span class="type"><a href="qlinef.html">QLineF</a></span>(m_mousePress<span class="operator">,</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos())<span class="operator">.</span>length() <span class="operator">&gt;</span> <span class="number">25.0</span>) )
m_mouseDrag <span class="operator">=</span> <span class="keyword">true</span>;
<span class="keyword">if</span> (m_mouseDrag) {
<span class="type"><a href="qrect.html">QRect</a></span> rectBefore <span class="operator">=</span> circle_bounds(m_pos<span class="operator">,</span> m_radius<span class="operator">,</span> m_fontSize);
<span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">&gt;</span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>MouseMove) {
<span class="type"><a href="qlinef.html">QLineF</a></span> line(m_pos<span class="operator">,</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos() <span class="operator">+</span> m_offset);
line<span class="operator">.</span>setLength(line<span class="operator">.</span>length() <span class="operator">*</span> <span class="operator">.</span><span class="number">1</span>);
<span class="type"><a href="qpointf.html">QPointF</a></span> dir(line<span class="operator">.</span>dx()<span class="operator">,</span> line<span class="operator">.</span>dy());
m_direction <span class="operator">=</span> (m_direction <span class="operator">+</span> dir) <span class="operator">/</span> <span class="number">2</span>;
}
m_pos <span class="operator">=</span> e<span class="operator">-</span><span class="operator">&gt;</span>pos() <span class="operator">+</span> m_offset;
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
<span class="keyword">if</span> (usesOpenGL()) {
update();
} <span class="keyword">else</span>
<span class="preprocessor">#endif</span>
{
<span class="type"><a href="qrect.html">QRect</a></span> rectAfter <span class="operator">=</span> circle_bounds(m_pos<span class="operator">,</span> m_radius<span class="operator">,</span> m_fontSize);
update(rectBefore <span class="operator">|</span> rectAfter);
}
}
}
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> PathDeformRenderer<span class="operator">::</span>lensDeform(<span class="keyword">const</span> <span class="type"><a href="qpainterpath.html">QPainterPath</a></span> <span class="operator">&amp;</span>source<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qpointf.html">QPointF</a></span> <span class="operator">&amp;</span>offset)
{
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addPath(source);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> flip <span class="operator">=</span> m_intensity <span class="operator">/</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">100</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">&lt;</span>path<span class="operator">.</span>elementCount(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">const</span> <span class="type"><a href="qpainterpath.html">QPainterPath</a></span><span class="operator">::</span>Element <span class="operator">&amp;</span>e <span class="operator">=</span> path<span class="operator">.</span>elementAt(i);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x <span class="operator">=</span> e<span class="operator">.</span>x <span class="operator">+</span> offset<span class="operator">.</span>x();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y <span class="operator">=</span> e<span class="operator">.</span>y <span class="operator">+</span> offset<span class="operator">.</span>y();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx <span class="operator">=</span> x <span class="operator">-</span> m_pos<span class="operator">.</span>x();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy <span class="operator">=</span> y <span class="operator">-</span> m_pos<span class="operator">.</span>y();
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> len <span class="operator">=</span> m_radius <span class="operator">-</span> <a href="qtcore-qmath-h.html#qSqrt">qSqrt</a>(dx <span class="operator">*</span> dx <span class="operator">+</span> dy <span class="operator">*</span> dy);
<span class="keyword">if</span> (len <span class="operator">&gt;</span> <span class="number">0</span>) {
path<span class="operator">.</span>setElementPositionAt(i<span class="operator">,</span>
x <span class="operator">+</span> flip <span class="operator">*</span> dx <span class="operator">*</span> len <span class="operator">/</span> m_radius<span class="operator">,</span>
y <span class="operator">+</span> flip <span class="operator">*</span> dy <span class="operator">*</span> len <span class="operator">/</span> m_radius);
} <span class="keyword">else</span> {
path<span class="operator">.</span>setElementPositionAt(i<span class="operator">,</span> x<span class="operator">,</span> y);
}
}
<span class="keyword">return</span> path;
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter)
{
<span class="type">int</span> pad_x <span class="operator">=</span> <span class="number">5</span>;
<span class="type">int</span> pad_y <span class="operator">=</span> <span class="number">5</span>;
<span class="type">int</span> skip_x <span class="operator">=</span> <a href="qtglobal.html#qRound">qRound</a>(m_pathBounds<span class="operator">.</span>width() <span class="operator">+</span> pad_x <span class="operator">+</span> m_fontSize<span class="operator">/</span><span class="number">2</span>);
<span class="type">int</span> skip_y <span class="operator">=</span> <a href="qtglobal.html#qRound">qRound</a>(m_pathBounds<span class="operator">.</span>height() <span class="operator">+</span> pad_y);
painter<span class="operator">-</span><span class="operator">&gt;</span>setPen(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen);
painter<span class="operator">-</span><span class="operator">&gt;</span>setBrush(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black);
<span class="type"><a href="qrectf.html">QRectF</a></span> clip(painter<span class="operator">-</span><span class="operator">&gt;</span>clipPath()<span class="operator">.</span>boundingRect());
<span class="type">int</span> overlap <span class="operator">=</span> pad_x <span class="operator">/</span> <span class="number">2</span>;
<span class="keyword">for</span> (<span class="type">int</span> start_y<span class="operator">=</span><span class="number">0</span>; start_y <span class="operator">&lt;</span> height(); start_y <span class="operator">+</span><span class="operator">=</span> skip_y) {
<span class="keyword">if</span> (start_y <span class="operator">&gt;</span> clip<span class="operator">.</span>bottom())
<span class="keyword">break</span>;
<span class="type">int</span> start_x <span class="operator">=</span> <span class="operator">-</span>overlap;
<span class="keyword">for</span> (; start_x <span class="operator">&lt;</span> width(); start_x <span class="operator">+</span><span class="operator">=</span> skip_x) {
<span class="keyword">if</span> (start_y <span class="operator">+</span> skip_y <span class="operator">&gt;</span><span class="operator">=</span> clip<span class="operator">.</span>top() <span class="operator">&amp;</span><span class="operator">&amp;</span>
start_x <span class="operator">+</span> skip_x <span class="operator">&gt;</span><span class="operator">=</span> clip<span class="operator">.</span>left() <span class="operator">&amp;</span><span class="operator">&amp;</span>
start_x <span class="operator">&lt;</span><span class="operator">=</span> clip<span class="operator">.</span>right()) {
<span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator">&lt;</span>m_paths<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path <span class="operator">=</span> lensDeform(m_paths<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(start_x<span class="operator">,</span> start_y));
painter<span class="operator">-</span><span class="operator">&gt;</span>drawPath(path);
}
}
}
overlap <span class="operator">=</span> skip_x <span class="operator">-</span> (start_x <span class="operator">-</span> width());
}
<span class="keyword">if</span> (preferImage()) {
painter<span class="operator">-</span><span class="operator">&gt;</span>drawImage(m_pos <span class="operator">-</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(m_radius <span class="operator">+</span> LENS_EXTENT<span class="operator">,</span> m_radius <span class="operator">+</span> LENS_EXTENT)<span class="operator">,</span>
m_lens_image);
} <span class="keyword">else</span> {
painter<span class="operator">-</span><span class="operator">&gt;</span>drawPixmap(m_pos <span class="operator">-</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(m_radius <span class="operator">+</span> LENS_EXTENT<span class="operator">,</span> m_radius <span class="operator">+</span> LENS_EXTENT)<span class="operator">,</span>
m_lens_pixmap);
}
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>setRadius(<span class="type">int</span> radius)
{
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> max <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(m_radius<span class="operator">,</span> (<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>)radius);
m_radius <span class="operator">=</span> radius;
generateLensPixmap();
<span class="keyword">if</span> (<span class="operator">!</span>m_animated <span class="operator">|</span><span class="operator">|</span> m_radius <span class="operator">&lt;</span> max) {
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
<span class="keyword">if</span> (usesOpenGL()) {
update();
} <span class="keyword">else</span>
<span class="preprocessor">#endif</span>
{
update(circle_bounds(m_pos<span class="operator">,</span> max<span class="operator">,</span> m_fontSize));
}
}
}
<span class="type">void</span> PathDeformRenderer<span class="operator">::</span>setIntensity(<span class="type">int</span> intensity)
{
m_intensity <span class="operator">=</span> intensity;
<span class="keyword">if</span> (<span class="operator">!</span>m_animated) {
<span class="preprocessor">#ifdef QT_OPENGL_SUPPORT</span>
<span class="keyword">if</span> (usesOpenGL()) {
update();
} <span class="keyword">else</span>
<span class="preprocessor">#endif</span>
{
update(circle_bounds(m_pos<span class="operator">,</span> m_radius<span class="operator">,</span> m_fontSize));
}
}
}</pre>
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<!-- @@@demos/deform/pathdeform.cpp -->
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