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50
51#include "window.h"
52
53#include <QComboBox>
54#include <QGridLayout>
55
56//! [0]
57Window::Window()
58{
59 originalRenderArea = new RenderArea;
60
61 shapeComboBox = new QComboBox;
62 shapeComboBox->addItem(tr("Clock"));
63 shapeComboBox->addItem(tr("House"));
64 shapeComboBox->addItem(tr("Text"));
65 shapeComboBox->addItem(tr("Truck"));
66
67 QGridLayout *layout = new QGridLayout;
68 layout->addWidget(originalRenderArea, 0, 0);
69 layout->addWidget(shapeComboBox, 1, 0);
70//! [0]
71
72//! [1]
73 for (int i = 0; i < NumTransformedAreas; ++i) {
74 transformedRenderAreas[i] = new RenderArea;
75
76 operationComboBoxes[i] = new QComboBox;
77 operationComboBoxes[i]->addItem(tr("No transformation"));
78 operationComboBoxes[i]->addItem(tr("Rotate by 60\xC2\xB0"));
79 operationComboBoxes[i]->addItem(tr("Scale to 75%"));
80 operationComboBoxes[i]->addItem(tr("Translate by (50, 50)"));
81
82 connect(operationComboBoxes[i], &QComboBox::activated,
83 this, &Window::operationChanged);
84
85 layout->addWidget(transformedRenderAreas[i], 0, i + 1);
86 layout->addWidget(operationComboBoxes[i], 1, i + 1);
87 }
88//! [1]
89
90//! [2]
91 setLayout(layout);
92 setupShapes();
93 shapeSelected(0);
94
95 setWindowTitle(tr("Transformations"));
96}
97//! [2]
98
99//! [3]
100void Window::setupShapes()
101{
102 QPainterPath truck;
103//! [3]
104 truck.setFillRule(Qt::WindingFill);
105 truck.moveTo(0.0, 87.0);
106 truck.lineTo(0.0, 60.0);
107 truck.lineTo(10.0, 60.0);
108 truck.lineTo(35.0, 35.0);
109 truck.lineTo(100.0, 35.0);
110 truck.lineTo(100.0, 87.0);
111 truck.lineTo(0.0, 87.0);
112 truck.moveTo(17.0, 60.0);
113 truck.lineTo(55.0, 60.0);
114 truck.lineTo(55.0, 40.0);
115 truck.lineTo(37.0, 40.0);
116 truck.lineTo(17.0, 60.0);
117 truck.addEllipse(17.0, 75.0, 25.0, 25.0);
118 truck.addEllipse(63.0, 75.0, 25.0, 25.0);
119
120//! [4]
121 QPainterPath clock;
122//! [4]
123 clock.addEllipse(-50.0, -50.0, 100.0, 100.0);
124 clock.addEllipse(-48.0, -48.0, 96.0, 96.0);
125 clock.moveTo(0.0, 0.0);
126 clock.lineTo(-2.0, -2.0);
127 clock.lineTo(0.0, -42.0);
128 clock.lineTo(2.0, -2.0);
129 clock.lineTo(0.0, 0.0);
130 clock.moveTo(0.0, 0.0);
131 clock.lineTo(2.732, -0.732);
132 clock.lineTo(24.495, 14.142);
133 clock.lineTo(0.732, 2.732);
134 clock.lineTo(0.0, 0.0);
135
136//! [5]
137 QPainterPath house;
138//! [5]
139 house.moveTo(-45.0, -20.0);
140 house.lineTo(0.0, -45.0);
141 house.lineTo(45.0, -20.0);
142 house.lineTo(45.0, 45.0);
143 house.lineTo(-45.0, 45.0);
144 house.lineTo(-45.0, -20.0);
145 house.addRect(15.0, 5.0, 20.0, 35.0);
146 house.addRect(-35.0, -15.0, 25.0, 25.0);
147
148//! [6]
149 QPainterPath text;
150//! [6]
151 QFont font;
152 font.setPixelSize(50);
153 QRect fontBoundingRect = QFontMetrics(font).boundingRect(tr("Qt"));
154 text.addText(-QPointF(fontBoundingRect.center()), font, tr("Qt"));
155
156//! [7]
157 shapes.append(clock);
158 shapes.append(house);
159 shapes.append(text);
160 shapes.append(truck);
161
162 connect(shapeComboBox, &QComboBox::activated,
163 this, &Window::shapeSelected);
164}
165//! [7]
166
167//! [8]
168void Window::operationChanged()
169{
170 static const Operation operationTable[] = {
171 NoTransformation, Rotate, Scale, Translate
172 };
173
174 QList<Operation> operations;
175 for (int i = 0; i < NumTransformedAreas; ++i) {
176 int index = operationComboBoxes[i]->currentIndex();
177 operations.append(operationTable[index]);
178 transformedRenderAreas[i]->setOperations(operations);
179 }
180}
181//! [8]
182
183//! [9]
184void Window::shapeSelected(int index)
185{
186 QPainterPath shape = shapes[index];
187 originalRenderArea->setShape(shape);
188 for (int i = 0; i < NumTransformedAreas; ++i)
189 transformedRenderAreas[i]->setShape(shape);
190}
191//! [9]
192