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#include <QtGui>
#include "window.h"
Window::Window()
{
originalRenderArea = new RenderArea;
shapeComboBox = new QComboBox;
shapeComboBox->addItem(tr("Clock"));
shapeComboBox->addItem(tr("House"));
shapeComboBox->addItem(tr("Text"));
shapeComboBox->addItem(tr("Truck"));
QGridLayout *layout = new QGridLayout;
layout->addWidget(originalRenderArea, 0, 0);
layout->addWidget(shapeComboBox, 1, 0);
for (int i = 0; i < NumTransformedAreas; ++i) {
transformedRenderAreas[i] = new RenderArea;
operationComboBoxes[i] = new QComboBox;
operationComboBoxes[i]->addItem(tr("No transformation"));
operationComboBoxes[i]->addItem(tr("Rotate by 60\xB0"));
operationComboBoxes[i]->addItem(tr("Scale to 75%"));
operationComboBoxes[i]->addItem(tr("Translate by (50, 50)"));
connect(operationComboBoxes[i], SIGNAL(activated(int)),
this, SLOT(operationChanged()));
layout->addWidget(transformedRenderAreas[i], 0, i + 1);
layout->addWidget(operationComboBoxes[i], 1, i + 1);
}
setLayout(layout);
setupShapes();
shapeSelected(0);
setWindowTitle(tr("Transformations"));
}
void Window::setupShapes()
{
QPainterPath truck;
truck.setFillRule(Qt::WindingFill);
truck.moveTo(0.0, 87.0);
truck.lineTo(0.0, 60.0);
truck.lineTo(10.0, 60.0);
truck.lineTo(35.0, 35.0);
truck.lineTo(100.0, 35.0);
truck.lineTo(100.0, 87.0);
truck.lineTo(0.0, 87.0);
truck.moveTo(17.0, 60.0);
truck.lineTo(55.0, 60.0);
truck.lineTo(55.0, 40.0);
truck.lineTo(37.0, 40.0);
truck.lineTo(17.0, 60.0);
truck.addEllipse(17.0, 75.0, 25.0, 25.0);
truck.addEllipse(63.0, 75.0, 25.0, 25.0);
QPainterPath clock;
clock.addEllipse(-50.0, -50.0, 100.0, 100.0);
clock.addEllipse(-48.0, -48.0, 96.0, 96.0);
clock.moveTo(0.0, 0.0);
clock.lineTo(-2.0, -2.0);
clock.lineTo(0.0, -42.0);
clock.lineTo(2.0, -2.0);
clock.lineTo(0.0, 0.0);
clock.moveTo(0.0, 0.0);
clock.lineTo(2.732, -0.732);
clock.lineTo(24.495, 14.142);
clock.lineTo(0.732, 2.732);
clock.lineTo(0.0, 0.0);
QPainterPath house;
house.moveTo(-45.0, -20.0);
house.lineTo(0.0, -45.0);
house.lineTo(45.0, -20.0);
house.lineTo(45.0, 45.0);
house.lineTo(-45.0, 45.0);
house.lineTo(-45.0, -20.0);
house.addRect(15.0, 5.0, 20.0, 35.0);
house.addRect(-35.0, -15.0, 25.0, 25.0);
QPainterPath text;
QFont font;
font.setPixelSize(50);
QRect fontBoundingRect = QFontMetrics(font).boundingRect(tr("Qt"));
text.addText(-QPointF(fontBoundingRect.center()), font, tr("Qt"));
shapes.append(clock);
shapes.append(house);
shapes.append(text);
shapes.append(truck);
connect(shapeComboBox, SIGNAL(activated(int)),
this, SLOT(shapeSelected(int)));
}
void Window::operationChanged()
{
static const Operation operationTable[] = {
NoTransformation, Rotate, Scale, Translate
};
QList<Operation> operations;
for (int i = 0; i < NumTransformedAreas; ++i) {
int index = operationComboBoxes[i]->currentIndex();
operations.append(operationTable[index]);
transformedRenderAreas[i]->setOperations(operations);
}
}
void Window::shapeSelected(int index)
{
QPainterPath shape = shapes[index];
originalRenderArea->setShape(shape);
for (int i = 0; i < NumTransformedAreas; ++i)
transformedRenderAreas[i]->setShape(shape);
}</pre>
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