window.cpp 范例文件

painting/painterpaths/window.cpp
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#include "renderarea.h" #include "window.h" #include <QtWidgets> #include <cmath> const float Pi = 3.14159f; 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(); 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(); QPainterPath ellipsePath; ellipsePath.moveTo(80.0, 50.0); ellipsePath.arcTo(20.0, 30.0, 60.0, 40.0, 0.0, 360.0); QPainterPath piePath; piePath.moveTo(50.0, 50.0); piePath.arcTo(20.0, 30.0, 60.0, 40.0, 60.0, 240.0); piePath.closeSubpath(); 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(); 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(); QPainterPath textPath; QFont timesFont("Times", 50); timesFont.setStyleStrategy(QFont::ForceOutline); textPath.addText(10, 70, timesFont, tr("Qt")); QPainterPath bezierPath; bezierPath.moveTo(20, 30); bezierPath.cubicTo(80, 0, 50, 50, 80, 80); QPainterPath starPath; starPath.moveTo(90, 50); for (int i = 1; i < 5; ++i) { starPath.lineTo(50 + 40 * std::cos(0.8 * i * Pi), 50 + 40 * std::sin(0.8 * i * Pi)); } starPath.closeSubpath(); 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)); 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); 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); connect(fillRuleComboBox, SIGNAL(activated(int)), this, SLOT(fillRuleChanged())); connect(fillColor1ComboBox, SIGNAL(activated(int)), this, SLOT(fillGradientChanged())); connect(fillColor2ComboBox, SIGNAL(activated(int)), this, SLOT(fillGradientChanged())); connect(penColorComboBox, SIGNAL(activated(int)), this, SLOT(penColorChanged())); for(QList<RenderArea*>::iterator it = renderAreas.begin(); it != renderAreas.end(); it++) { connect(penWidthSpinBox, SIGNAL(valueChanged(int)), *it, SLOT(setPenWidth(int))); connect(rotationAngleSpinBox, SIGNAL(valueChanged(int)), *it, SLOT(setRotationAngle(int))); } QGridLayout *topLayout = new QGridLayout; int i=0; for(QList<RenderArea*>::iterator it = renderAreas.begin(); it != renderAreas.end(); it++, i++) topLayout->addWidget(*it, i / 3, i % 3); 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); fillRuleChanged(); fillGradientChanged(); penColorChanged(); penWidthSpinBox->setValue(2); setWindowTitle(tr("Painter Paths")); } void Window::fillRuleChanged() { Qt::FillRule rule = (Qt::FillRule)currentItemData(fillRuleComboBox).toInt(); for (QList<RenderArea*>::iterator it = renderAreas.begin(); it != renderAreas.end(); ++it) (*it)->setFillRule(rule); } void Window::fillGradientChanged() { QColor color1 = qvariant_cast<QColor>(currentItemData(fillColor1ComboBox)); QColor color2 = qvariant_cast<QColor>(currentItemData(fillColor2ComboBox)); for (QList<RenderArea*>::iterator it = renderAreas.begin(); it != renderAreas.end(); ++it) (*it)->setFillGradient(color1, color2); } void Window::penColorChanged() { QColor color = qvariant_cast<QColor>(currentItemData(penColorComboBox)); for (QList<RenderArea*>::iterator it = renderAreas.begin(); it != renderAreas.end(); ++it) (*it)->setPenColor(color); } void Window::populateWithColors(QComboBox *comboBox) { QStringList colorNames = QColor::colorNames(); foreach (QString name, colorNames) comboBox->addItem(name, QColor(name)); } QVariant Window::currentItemData(QComboBox *comboBox) { return comboBox->itemData(comboBox->currentIndex()); }