window.cpp Example File

painting/basicdrawing/window.cpp
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#include "renderarea.h" #include "window.h" #include <QtWidgets> const int IdRole = Qt::UserRole; Window::Window() { renderArea = new RenderArea; shapeComboBox = new QComboBox; shapeComboBox->addItem(tr("Polygon"), RenderArea::Polygon); shapeComboBox->addItem(tr("Rectangle"), RenderArea::Rect); shapeComboBox->addItem(tr("Rounded Rectangle"), RenderArea::RoundedRect); shapeComboBox->addItem(tr("Ellipse"), RenderArea::Ellipse); shapeComboBox->addItem(tr("Pie"), RenderArea::Pie); shapeComboBox->addItem(tr("Chord"), RenderArea::Chord); shapeComboBox->addItem(tr("Path"), RenderArea::Path); shapeComboBox->addItem(tr("Line"), RenderArea::Line); shapeComboBox->addItem(tr("Polyline"), RenderArea::Polyline); shapeComboBox->addItem(tr("Arc"), RenderArea::Arc); shapeComboBox->addItem(tr("Points"), RenderArea::Points); shapeComboBox->addItem(tr("Text"), RenderArea::Text); shapeComboBox->addItem(tr("Pixmap"), RenderArea::Pixmap); shapeLabel = new QLabel(tr("&Shape:")); shapeLabel->setBuddy(shapeComboBox); penWidthSpinBox = new QSpinBox; penWidthSpinBox->setRange(0, 20); penWidthSpinBox->setSpecialValueText(tr("0 (cosmetic pen)")); penWidthLabel = new QLabel(tr("Pen &Width:")); penWidthLabel->setBuddy(penWidthSpinBox); penStyleComboBox = new QComboBox; penStyleComboBox->addItem(tr("Solid"), static_cast<int>(Qt::SolidLine)); penStyleComboBox->addItem(tr("Dash"), static_cast<int>(Qt::DashLine)); penStyleComboBox->addItem(tr("Dot"), static_cast<int>(Qt::DotLine)); penStyleComboBox->addItem(tr("Dash Dot"), static_cast<int>(Qt::DashDotLine)); penStyleComboBox->addItem(tr("Dash Dot Dot"), static_cast<int>(Qt::DashDotDotLine)); penStyleComboBox->addItem(tr("None"), static_cast<int>(Qt::NoPen)); penStyleLabel = new QLabel(tr("&Pen Style:")); penStyleLabel->setBuddy(penStyleComboBox); penCapComboBox = new QComboBox; penCapComboBox->addItem(tr("Flat"), Qt::FlatCap); penCapComboBox->addItem(tr("Square"), Qt::SquareCap); penCapComboBox->addItem(tr("Round"), Qt::RoundCap); penCapLabel = new QLabel(tr("Pen &Cap:")); penCapLabel->setBuddy(penCapComboBox); penJoinComboBox = new QComboBox; penJoinComboBox->addItem(tr("Miter"), Qt::MiterJoin); penJoinComboBox->addItem(tr("Bevel"), Qt::BevelJoin); penJoinComboBox->addItem(tr("Round"), Qt::RoundJoin); penJoinLabel = new QLabel(tr("Pen &Join:")); penJoinLabel->setBuddy(penJoinComboBox); brushStyleComboBox = new QComboBox; brushStyleComboBox->addItem(tr("Linear Gradient"), static_cast<int>(Qt::LinearGradientPattern)); brushStyleComboBox->addItem(tr("Radial Gradient"), static_cast<int>(Qt::RadialGradientPattern)); brushStyleComboBox->addItem(tr("Conical Gradient"), static_cast<int>(Qt::ConicalGradientPattern)); brushStyleComboBox->addItem(tr("Texture"), static_cast<int>(Qt::TexturePattern)); brushStyleComboBox->addItem(tr("Solid"), static_cast<int>(Qt::SolidPattern)); brushStyleComboBox->addItem(tr("Horizontal"), static_cast<int>(Qt::HorPattern)); brushStyleComboBox->addItem(tr("Vertical"), static_cast<int>(Qt::VerPattern)); brushStyleComboBox->addItem(tr("Cross"), static_cast<int>(Qt::CrossPattern)); brushStyleComboBox->addItem(tr("Backward Diagonal"), static_cast<int>(Qt::BDiagPattern)); brushStyleComboBox->addItem(tr("Forward Diagonal"), static_cast<int>(Qt::FDiagPattern)); brushStyleComboBox->addItem(tr("Diagonal Cross"), static_cast<int>(Qt::DiagCrossPattern)); brushStyleComboBox->addItem(tr("Dense 1"), static_cast<int>(Qt::Dense1Pattern)); brushStyleComboBox->addItem(tr("Dense 2"), static_cast<int>(Qt::Dense2Pattern)); brushStyleComboBox->addItem(tr("Dense 3"), static_cast<int>(Qt::Dense3Pattern)); brushStyleComboBox->addItem(tr("Dense 4"), static_cast<int>(Qt::Dense4Pattern)); brushStyleComboBox->addItem(tr("Dense 5"), static_cast<int>(Qt::Dense5Pattern)); brushStyleComboBox->addItem(tr("Dense 6"), static_cast<int>(Qt::Dense6Pattern)); brushStyleComboBox->addItem(tr("Dense 7"), static_cast<int>(Qt::Dense7Pattern)); brushStyleComboBox->addItem(tr("None"), static_cast<int>(Qt::NoBrush)); brushStyleLabel = new QLabel(tr("&Brush:")); brushStyleLabel->setBuddy(brushStyleComboBox); otherOptionsLabel = new QLabel(tr("Options:")); antialiasingCheckBox = new QCheckBox(tr("&Antialiasing")); transformationsCheckBox = new QCheckBox(tr("&Transformations")); connect(shapeComboBox, SIGNAL(activated(int)), this, SLOT(shapeChanged())); connect(penWidthSpinBox, SIGNAL(valueChanged(int)), this, SLOT(penChanged())); connect(penStyleComboBox, SIGNAL(activated(int)), this, SLOT(penChanged())); connect(penCapComboBox, SIGNAL(activated(int)), this, SLOT(penChanged())); connect(penJoinComboBox, SIGNAL(activated(int)), this, SLOT(penChanged())); connect(brushStyleComboBox, SIGNAL(activated(int)), this, SLOT(brushChanged())); connect(antialiasingCheckBox, SIGNAL(toggled(bool)), renderArea, SLOT(setAntialiased(bool))); connect(transformationsCheckBox, SIGNAL(toggled(bool)), renderArea, SLOT(setTransformed(bool))); QGridLayout *mainLayout = new QGridLayout; mainLayout->setColumnStretch(0, 1); mainLayout->setColumnStretch(3, 1); mainLayout->addWidget(renderArea, 0, 0, 1, 4); mainLayout->addWidget(shapeLabel, 2, 0, Qt::AlignRight); mainLayout->addWidget(shapeComboBox, 2, 1); mainLayout->addWidget(penWidthLabel, 3, 0, Qt::AlignRight); mainLayout->addWidget(penWidthSpinBox, 3, 1); mainLayout->addWidget(penStyleLabel, 4, 0, Qt::AlignRight); mainLayout->addWidget(penStyleComboBox, 4, 1); mainLayout->addWidget(penCapLabel, 3, 2, Qt::AlignRight); mainLayout->addWidget(penCapComboBox, 3, 3); mainLayout->addWidget(penJoinLabel, 2, 2, Qt::AlignRight); mainLayout->addWidget(penJoinComboBox, 2, 3); mainLayout->addWidget(brushStyleLabel, 4, 2, Qt::AlignRight); mainLayout->addWidget(brushStyleComboBox, 4, 3); mainLayout->addWidget(otherOptionsLabel, 5, 0, Qt::AlignRight); mainLayout->addWidget(antialiasingCheckBox, 5, 1, 1, 1, Qt::AlignRight); mainLayout->addWidget(transformationsCheckBox, 5, 2, 1, 2, Qt::AlignRight); setLayout(mainLayout); shapeChanged(); penChanged(); brushChanged(); antialiasingCheckBox->setChecked(true); setWindowTitle(tr("Basic Drawing")); } void Window::shapeChanged() { RenderArea::Shape shape = RenderArea::Shape(shapeComboBox->itemData( shapeComboBox->currentIndex(), IdRole).toInt()); renderArea->setShape(shape); } void Window::penChanged() { int width = penWidthSpinBox->value(); Qt::PenStyle style = Qt::PenStyle(penStyleComboBox->itemData( penStyleComboBox->currentIndex(), IdRole).toInt()); Qt::PenCapStyle cap = Qt::PenCapStyle(penCapComboBox->itemData( penCapComboBox->currentIndex(), IdRole).toInt()); Qt::PenJoinStyle join = Qt::PenJoinStyle(penJoinComboBox->itemData( penJoinComboBox->currentIndex(), IdRole).toInt()); renderArea->setPen(QPen(Qt::blue, width, style, cap, join)); } void Window::brushChanged() { Qt::BrushStyle style = Qt::BrushStyle(brushStyleComboBox->itemData( brushStyleComboBox->currentIndex(), IdRole).toInt()); if (style == Qt::LinearGradientPattern) { QLinearGradient linearGradient(0, 0, 100, 100); linearGradient.setColorAt(0.0, Qt::white); linearGradient.setColorAt(0.2, Qt::green); linearGradient.setColorAt(1.0, Qt::black); renderArea->setBrush(linearGradient); } else if (style == Qt::RadialGradientPattern) { QRadialGradient radialGradient(50, 50, 50, 70, 70); radialGradient.setColorAt(0.0, Qt::white); radialGradient.setColorAt(0.2, Qt::green); radialGradient.setColorAt(1.0, Qt::black); renderArea->setBrush(radialGradient); } else if (style == Qt::ConicalGradientPattern) { QConicalGradient conicalGradient(50, 50, 150); conicalGradient.setColorAt(0.0, Qt::white); conicalGradient.setColorAt(0.2, Qt::green); conicalGradient.setColorAt(1.0, Qt::black); renderArea->setBrush(conicalGradient); } else if (style == Qt::TexturePattern) { renderArea->setBrush(QBrush(QPixmap(":/images/brick.png"))); } else { renderArea->setBrush(QBrush(Qt::green, style)); } }

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