qt-everywhere-src-5.14.1/qtbase/examples/widgets/painting/painterpaths/window.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "renderarea.h"
 #include "window.h"

 #include <QtWidgets>

 #include <qmath.h>

 //! [1]
 Window::Window()
 {
     QPainterPath rectPath;
     rectPath.moveTo(20.0, 30.0);
     rectPath.lineTo(80.0, 30.0);
     rectPath.lineTo(80.0, 70.0);
     rectPath.lineTo(20.0, 70.0);
     rectPath.closeSubpath();
 //! [1]

 //! [2]
     QPainterPath roundRectPath;
     roundRectPath.moveTo(80.0, 35.0);
     roundRectPath.arcTo(70.0, 30.0, 10.0, 10.0, 0.0, 90.0);
     roundRectPath.lineTo(25.0, 30.0);
     roundRectPath.arcTo(20.0, 30.0, 10.0, 10.0, 90.0, 90.0);
     roundRectPath.lineTo(20.0, 65.0);
     roundRectPath.arcTo(20.0, 60.0, 10.0, 10.0, 180.0, 90.0);
     roundRectPath.lineTo(75.0, 70.0);
     roundRectPath.arcTo(70.0, 60.0, 10.0, 10.0, 270.0, 90.0);
     roundRectPath.closeSubpath();
 //! [2]

 //! [3]
     QPainterPath ellipsePath;
     ellipsePath.moveTo(80.0, 50.0);
     ellipsePath.arcTo(20.0, 30.0, 60.0, 40.0, 0.0, 360.0);
 //! [3]

 //! [4]
     QPainterPath piePath;
     piePath.moveTo(50.0, 50.0);
     piePath.arcTo(20.0, 30.0, 60.0, 40.0, 60.0, 240.0);
     piePath.closeSubpath();
 //! [4]

 //! [5]
     QPainterPath polygonPath;
     polygonPath.moveTo(10.0, 80.0);
     polygonPath.lineTo(20.0, 10.0);
     polygonPath.lineTo(80.0, 30.0);
     polygonPath.lineTo(90.0, 70.0);
     polygonPath.closeSubpath();
 //! [5]

 //! [6]
     QPainterPath groupPath;
     groupPath.moveTo(60.0, 40.0);
     groupPath.arcTo(20.0, 20.0, 40.0, 40.0, 0.0, 360.0);
     groupPath.moveTo(40.0, 40.0);
     groupPath.lineTo(40.0, 80.0);
     groupPath.lineTo(80.0, 80.0);
     groupPath.lineTo(80.0, 40.0);
     groupPath.closeSubpath();
 //! [6]

 //! [7]
     QPainterPath textPath;
     QFont timesFont("Times", 50);
     timesFont.setStyleStrategy(QFont::ForceOutline);
     textPath.addText(10, 70, timesFont, tr("Qt"));
 //! [7]

 //! [8]
     QPainterPath bezierPath;
     bezierPath.moveTo(20, 30);
     bezierPath.cubicTo(80, 0, 50, 50, 80, 80);
 //! [8]

 //! [9]
     QPainterPath starPath;
     starPath.moveTo(90, 50);
     for (int i = 1; i < 5; ++i) {
         starPath.lineTo(50 + 40 * std::cos(0.8 * i * M_PI),
                         50 + 40 * std::sin(0.8 * i * M_PI));
     }
     starPath.closeSubpath();
 //! [9]

 //! [10]
     renderAreas.push_back(new RenderArea(rectPath));
     renderAreas.push_back(new RenderArea(roundRectPath));
     renderAreas.push_back(new RenderArea(ellipsePath));
     renderAreas.push_back(new RenderArea(piePath));
     renderAreas.push_back(new RenderArea(polygonPath));
     renderAreas.push_back(new RenderArea(groupPath));
     renderAreas.push_back(new RenderArea(textPath));
     renderAreas.push_back(new RenderArea(bezierPath));
     renderAreas.push_back(new RenderArea(starPath));
 //! [10]

 //! [11]
     fillRuleComboBox = new QComboBox;
     fillRuleComboBox->addItem(tr("Odd Even"), Qt::OddEvenFill);
     fillRuleComboBox->addItem(tr("Winding"), Qt::WindingFill);

     fillRuleLabel = new QLabel(tr("Fill &Rule:"));
     fillRuleLabel->setBuddy(fillRuleComboBox);
 //! [11]

 //! [12]
     fillColor1ComboBox = new QComboBox;
     populateWithColors(fillColor1ComboBox);
     fillColor1ComboBox->setCurrentIndex(fillColor1ComboBox->findText("mediumslateblue"));

     fillColor2ComboBox = new QComboBox;
     populateWithColors(fillColor2ComboBox);
     fillColor2ComboBox->setCurrentIndex(fillColor2ComboBox->findText("cornsilk"));

     fillGradientLabel = new QLabel(tr("&Fill Gradient:"));
     fillGradientLabel->setBuddy(fillColor1ComboBox);

     fillToLabel = new QLabel(tr("to"));
     fillToLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

     penWidthSpinBox = new QSpinBox;
     penWidthSpinBox->setRange(0, 20);

     penWidthLabel = new QLabel(tr("&Pen Width:"));
     penWidthLabel->setBuddy(penWidthSpinBox);

     penColorComboBox = new QComboBox;
     populateWithColors(penColorComboBox);
     penColorComboBox->setCurrentIndex(penColorComboBox->findText("darkslateblue"));

     penColorLabel = new QLabel(tr("Pen &Color:"));
     penColorLabel->setBuddy(penColorComboBox);

     rotationAngleSpinBox = new QSpinBox;
     rotationAngleSpinBox->setRange(0, 359);
     rotationAngleSpinBox->setWrapping(true);
     rotationAngleSpinBox->setSuffix(QLatin1String("\xB0"));

     rotationAngleLabel = new QLabel(tr("&Rotation Angle:"));
     rotationAngleLabel->setBuddy(rotationAngleSpinBox);
 //! [12]

 //! [16]
     connect(fillRuleComboBox, QOverload<int>::of(&QComboBox::activated),
             this, &Window::fillRuleChanged);
     connect(fillColor1ComboBox, QOverload<int>::of(&QComboBox::activated),
             this, &Window::fillGradientChanged);
     connect(fillColor2ComboBox, QOverload<int>::of(&QComboBox::activated),
             this, &Window::fillGradientChanged);
     connect(penColorComboBox, QOverload<int>::of(&QComboBox::activated),
             this, &Window::penColorChanged);

     for (RenderArea *area : qAsConst(renderAreas)) {
         connect(penWidthSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
                 area, &RenderArea::setPenWidth);
         connect(rotationAngleSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
                 area, &RenderArea::setRotationAngle);
     }

 //! [16] //! [17]
     QGridLayout *topLayout = new QGridLayout;

     int i = 0;
     for (RenderArea *area : qAsConst(renderAreas)) {
         topLayout->addWidget(area, i / 3, i % 3);
         ++i;
     }

     QGridLayout *mainLayout = new QGridLayout;
     mainLayout->addLayout(topLayout, 0, 0, 1, 4);
     mainLayout->addWidget(fillRuleLabel, 1, 0);
     mainLayout->addWidget(fillRuleComboBox, 1, 1, 1, 3);
     mainLayout->addWidget(fillGradientLabel, 2, 0);
     mainLayout->addWidget(fillColor1ComboBox, 2, 1);
     mainLayout->addWidget(fillToLabel, 2, 2);
     mainLayout->addWidget(fillColor2ComboBox, 2, 3);
     mainLayout->addWidget(penWidthLabel, 3, 0);
     mainLayout->addWidget(penWidthSpinBox, 3, 1, 1, 3);
     mainLayout->addWidget(penColorLabel, 4, 0);
     mainLayout->addWidget(penColorComboBox, 4, 1, 1, 3);
     mainLayout->addWidget(rotationAngleLabel, 5, 0);
     mainLayout->addWidget(rotationAngleSpinBox, 5, 1, 1, 3);
     setLayout(mainLayout);
 //! [17]

 //! [18]
     fillRuleChanged();
     fillGradientChanged();
     penColorChanged();
     penWidthSpinBox->setValue(2);

     setWindowTitle(tr("Painter Paths"));
 }
 //! [18]

 //! [19]
 void Window::fillRuleChanged()
 {
     Qt::FillRule rule = (Qt::FillRule)currentItemData(fillRuleComboBox).toInt();

     for (RenderArea *area : qAsConst(renderAreas))
         area->setFillRule(rule);
 }
 //! [19]

 //! [20]
 void Window::fillGradientChanged()
 {
     QColor color1 = qvariant_cast<QColor>(currentItemData(fillColor1ComboBox));
     QColor color2 = qvariant_cast<QColor>(currentItemData(fillColor2ComboBox));

     for (RenderArea *area : qAsConst(renderAreas))
         area->setFillGradient(color1, color2);
 }
 //! [20]

 //! [21]
 void Window::penColorChanged()
 {
     QColor color = qvariant_cast<QColor>(currentItemData(penColorComboBox));

     for (RenderArea *area : qAsConst(renderAreas))
         area->setPenColor(color);
 }
 //! [21]

 //! [22]
 void Window::populateWithColors(QComboBox *comboBox)
 {
     const QStringList colorNames = QColor::colorNames();
     for (const QString &name : colorNames)
         comboBox->addItem(name, QColor(name));
 }
 //! [22]

 //! [23]
 QVariant Window::currentItemData(QComboBox *comboBox)
 {
     return comboBox->itemData(comboBox->currentIndex());
 }
 //! [23]
	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the examples of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** BSD License Usage
	** Alternatively, you may use this file under the terms of the BSD license
	** as follows:
	**
	** "Redistribution and use in source and binary forms, with or without
	** modification, are permitted provided that the following conditions are
	** met:
	** * Redistributions of source code must retain the above copyright
	** notice, this list of conditions and the following disclaimer.
	** * Redistributions in binary form must reproduce the above copyright
	** notice, this list of conditions and the following disclaimer in
	** the documentation and/or other materials provided with the
	** distribution.
	** * Neither the name of The Qt Company Ltd nor the names of its
	** contributors may be used to endorse or promote products derived
	** from this software without specific prior written permission.
	**
	**
	** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "renderarea.h"
	#include "window.h"

	#include <QtWidgets>

	#include <qmath.h>

	//! [1]
	Window::Window()
	{
	QPainterPath rectPath;
	rectPath.moveTo(20.0, 30.0);
	rectPath.lineTo(80.0, 30.0);
	rectPath.lineTo(80.0, 70.0);
	rectPath.lineTo(20.0, 70.0);
	rectPath.closeSubpath();
	//! [1]

	//! [2]
	QPainterPath roundRectPath;
	roundRectPath.moveTo(80.0, 35.0);
	roundRectPath.arcTo(70.0, 30.0, 10.0, 10.0, 0.0, 90.0);
	roundRectPath.lineTo(25.0, 30.0);
	roundRectPath.arcTo(20.0, 30.0, 10.0, 10.0, 90.0, 90.0);
	roundRectPath.lineTo(20.0, 65.0);
	roundRectPath.arcTo(20.0, 60.0, 10.0, 10.0, 180.0, 90.0);
	roundRectPath.lineTo(75.0, 70.0);
	roundRectPath.arcTo(70.0, 60.0, 10.0, 10.0, 270.0, 90.0);
	roundRectPath.closeSubpath();
	//! [2]

	//! [3]
	QPainterPath ellipsePath;
	ellipsePath.moveTo(80.0, 50.0);
	ellipsePath.arcTo(20.0, 30.0, 60.0, 40.0, 0.0, 360.0);
	//! [3]

	//! [4]
	QPainterPath piePath;
	piePath.moveTo(50.0, 50.0);
	piePath.arcTo(20.0, 30.0, 60.0, 40.0, 60.0, 240.0);
	piePath.closeSubpath();
	//! [4]

	//! [5]
	QPainterPath polygonPath;
	polygonPath.moveTo(10.0, 80.0);
	polygonPath.lineTo(20.0, 10.0);
	polygonPath.lineTo(80.0, 30.0);
	polygonPath.lineTo(90.0, 70.0);
	polygonPath.closeSubpath();
	//! [5]

	//! [6]
	QPainterPath groupPath;
	groupPath.moveTo(60.0, 40.0);
	groupPath.arcTo(20.0, 20.0, 40.0, 40.0, 0.0, 360.0);
	groupPath.moveTo(40.0, 40.0);
	groupPath.lineTo(40.0, 80.0);
	groupPath.lineTo(80.0, 80.0);
	groupPath.lineTo(80.0, 40.0);
	groupPath.closeSubpath();
	//! [6]

	//! [7]
	QPainterPath textPath;
	QFont timesFont("Times", 50);
	timesFont.setStyleStrategy(QFont::ForceOutline);
	textPath.addText(10, 70, timesFont, tr("Qt"));
	//! [7]

	//! [8]
	QPainterPath bezierPath;
	bezierPath.moveTo(20, 30);
	bezierPath.cubicTo(80, 0, 50, 50, 80, 80);
	//! [8]

	//! [9]
	QPainterPath starPath;
	starPath.moveTo(90, 50);
	for (int i = 1; i < 5; ++i) {
	starPath.lineTo(50 + 40 * std::cos(0.8 * i * M_PI),
	50 + 40 * std::sin(0.8 * i * M_PI));
	}
	starPath.closeSubpath();
	//! [9]

	//! [10]
	renderAreas.push_back(new RenderArea(rectPath));
	renderAreas.push_back(new RenderArea(roundRectPath));
	renderAreas.push_back(new RenderArea(ellipsePath));
	renderAreas.push_back(new RenderArea(piePath));
	renderAreas.push_back(new RenderArea(polygonPath));
	renderAreas.push_back(new RenderArea(groupPath));
	renderAreas.push_back(new RenderArea(textPath));
	renderAreas.push_back(new RenderArea(bezierPath));
	renderAreas.push_back(new RenderArea(starPath));
	//! [10]

	//! [11]
	fillRuleComboBox = new QComboBox;
	fillRuleComboBox->addItem(tr("Odd Even"), Qt::OddEvenFill);
	fillRuleComboBox->addItem(tr("Winding"), Qt::WindingFill);

	fillRuleLabel = new QLabel(tr("Fill &Rule:"));
	fillRuleLabel->setBuddy(fillRuleComboBox);
	//! [11]

	//! [12]
	fillColor1ComboBox = new QComboBox;
	populateWithColors(fillColor1ComboBox);
	fillColor1ComboBox->setCurrentIndex(fillColor1ComboBox->findText("mediumslateblue"));

	fillColor2ComboBox = new QComboBox;
	populateWithColors(fillColor2ComboBox);
	fillColor2ComboBox->setCurrentIndex(fillColor2ComboBox->findText("cornsilk"));

	fillGradientLabel = new QLabel(tr("&Fill Gradient:"));
	fillGradientLabel->setBuddy(fillColor1ComboBox);

	fillToLabel = new QLabel(tr("to"));
	fillToLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

	penWidthSpinBox = new QSpinBox;
	penWidthSpinBox->setRange(0, 20);

	penWidthLabel = new QLabel(tr("&Pen Width:"));
	penWidthLabel->setBuddy(penWidthSpinBox);

	penColorComboBox = new QComboBox;
	populateWithColors(penColorComboBox);
	penColorComboBox->setCurrentIndex(penColorComboBox->findText("darkslateblue"));

	penColorLabel = new QLabel(tr("Pen &Color:"));
	penColorLabel->setBuddy(penColorComboBox);

	rotationAngleSpinBox = new QSpinBox;
	rotationAngleSpinBox->setRange(0, 359);
	rotationAngleSpinBox->setWrapping(true);
	rotationAngleSpinBox->setSuffix(QLatin1String("\xB0"));

	rotationAngleLabel = new QLabel(tr("&Rotation Angle:"));
	rotationAngleLabel->setBuddy(rotationAngleSpinBox);
	//! [12]

	//! [16]
	connect(fillRuleComboBox, QOverload<int>::of(&QComboBox::activated),
	this, &Window::fillRuleChanged);
	connect(fillColor1ComboBox, QOverload<int>::of(&QComboBox::activated),
	this, &Window::fillGradientChanged);
	connect(fillColor2ComboBox, QOverload<int>::of(&QComboBox::activated),
	this, &Window::fillGradientChanged);
	connect(penColorComboBox, QOverload<int>::of(&QComboBox::activated),
	this, &Window::penColorChanged);

	for (RenderArea *area : qAsConst(renderAreas)) {
	connect(penWidthSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
	area, &RenderArea::setPenWidth);
	connect(rotationAngleSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
	area, &RenderArea::setRotationAngle);
	}

	//! [16] //! [17]
	QGridLayout *topLayout = new QGridLayout;

	int i = 0;
	for (RenderArea *area : qAsConst(renderAreas)) {
	topLayout->addWidget(area, i / 3, i % 3);
	++i;
	}

	QGridLayout *mainLayout = new QGridLayout;
	mainLayout->addLayout(topLayout, 0, 0, 1, 4);
	mainLayout->addWidget(fillRuleLabel, 1, 0);
	mainLayout->addWidget(fillRuleComboBox, 1, 1, 1, 3);
	mainLayout->addWidget(fillGradientLabel, 2, 0);
	mainLayout->addWidget(fillColor1ComboBox, 2, 1);
	mainLayout->addWidget(fillToLabel, 2, 2);
	mainLayout->addWidget(fillColor2ComboBox, 2, 3);
	mainLayout->addWidget(penWidthLabel, 3, 0);
	mainLayout->addWidget(penWidthSpinBox, 3, 1, 1, 3);
	mainLayout->addWidget(penColorLabel, 4, 0);
	mainLayout->addWidget(penColorComboBox, 4, 1, 1, 3);
	mainLayout->addWidget(rotationAngleLabel, 5, 0);
	mainLayout->addWidget(rotationAngleSpinBox, 5, 1, 1, 3);
	setLayout(mainLayout);
	//! [17]

	//! [18]
	fillRuleChanged();
	fillGradientChanged();
	penColorChanged();
	penWidthSpinBox->setValue(2);

	setWindowTitle(tr("Painter Paths"));
	}
	//! [18]

	//! [19]
	void Window::fillRuleChanged()
	{
	Qt::FillRule rule = (Qt::FillRule)currentItemData(fillRuleComboBox).toInt();

	for (RenderArea *area : qAsConst(renderAreas))
	area->setFillRule(rule);
	}
	//! [19]

	//! [20]
	void Window::fillGradientChanged()
	{
	QColor color1 = qvariant_cast<QColor>(currentItemData(fillColor1ComboBox));
	QColor color2 = qvariant_cast<QColor>(currentItemData(fillColor2ComboBox));

	for (RenderArea *area : qAsConst(renderAreas))
	area->setFillGradient(color1, color2);
	}
	//! [20]

	//! [21]
	void Window::penColorChanged()
	{
	QColor color = qvariant_cast<QColor>(currentItemData(penColorComboBox));

	for (RenderArea *area : qAsConst(renderAreas))
	area->setPenColor(color);
	}
	//! [21]

	//! [22]
	void Window::populateWithColors(QComboBox *comboBox)
	{
	const QStringList colorNames = QColor::colorNames();
	for (const QString &name : colorNames)
	comboBox->addItem(name, QColor(name));
	}
	//! [22]

	//! [23]
	QVariant Window::currentItemData(QComboBox *comboBox)
	{
	return comboBox->itemData(comboBox->currentIndex());
	}
	//! [23]