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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(atext: tr(s: "Clock"));
63 shapeComboBox->addItem(atext: tr(s: "House"));
64 shapeComboBox->addItem(atext: tr(s: "Text"));
65 shapeComboBox->addItem(atext: tr(s: "Truck"));
66
67 QGridLayout *layout = new QGridLayout;
68 layout->addWidget(originalRenderArea, row: 0, column: 0);
69 layout->addWidget(shapeComboBox, row: 1, column: 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(atext: tr(s: "No transformation"));
78 operationComboBoxes[i]->addItem(atext: tr(s: "Rotate by 60\xC2\xB0"));
79 operationComboBoxes[i]->addItem(atext: tr(s: "Scale to 75%"));
80 operationComboBoxes[i]->addItem(atext: tr(s: "Translate by (50, 50)"));
81
82 connect(sender: operationComboBoxes[i], signal: QOverload<int>::of(ptr: &QComboBox::activated),
83 receiver: this, slot: &Window::operationChanged);
84
85 layout->addWidget(transformedRenderAreas[i], row: 0, column: i + 1);
86 layout->addWidget(operationComboBoxes[i], row: 1, column: i + 1);
87 }
88//! [1]
89
90//! [2]
91 setLayout(layout);
92 setupShapes();
93 shapeSelected(index: 0);
94
95 setWindowTitle(tr(s: "Transformations"));
96}
97//! [2]
98
99//! [3]
100void Window::setupShapes()
101{
102 QPainterPath truck;
103//! [3]
104 truck.setFillRule(Qt::WindingFill);
105 truck.moveTo(x: 0.0, y: 87.0);
106 truck.lineTo(x: 0.0, y: 60.0);
107 truck.lineTo(x: 10.0, y: 60.0);
108 truck.lineTo(x: 35.0, y: 35.0);
109 truck.lineTo(x: 100.0, y: 35.0);
110 truck.lineTo(x: 100.0, y: 87.0);
111 truck.lineTo(x: 0.0, y: 87.0);
112 truck.moveTo(x: 17.0, y: 60.0);
113 truck.lineTo(x: 55.0, y: 60.0);
114 truck.lineTo(x: 55.0, y: 40.0);
115 truck.lineTo(x: 37.0, y: 40.0);
116 truck.lineTo(x: 17.0, y: 60.0);
117 truck.addEllipse(x: 17.0, y: 75.0, w: 25.0, h: 25.0);
118 truck.addEllipse(x: 63.0, y: 75.0, w: 25.0, h: 25.0);
119
120//! [4]
121 QPainterPath clock;
122//! [4]
123 clock.addEllipse(x: -50.0, y: -50.0, w: 100.0, h: 100.0);
124 clock.addEllipse(x: -48.0, y: -48.0, w: 96.0, h: 96.0);
125 clock.moveTo(x: 0.0, y: 0.0);
126 clock.lineTo(x: -2.0, y: -2.0);
127 clock.lineTo(x: 0.0, y: -42.0);
128 clock.lineTo(x: 2.0, y: -2.0);
129 clock.lineTo(x: 0.0, y: 0.0);
130 clock.moveTo(x: 0.0, y: 0.0);
131 clock.lineTo(x: 2.732, y: -0.732);
132 clock.lineTo(x: 24.495, y: 14.142);
133 clock.lineTo(x: 0.732, y: 2.732);
134 clock.lineTo(x: 0.0, y: 0.0);
135
136//! [5]
137 QPainterPath house;
138//! [5]
139 house.moveTo(x: -45.0, y: -20.0);
140 house.lineTo(x: 0.0, y: -45.0);
141 house.lineTo(x: 45.0, y: -20.0);
142 house.lineTo(x: 45.0, y: 45.0);
143 house.lineTo(x: -45.0, y: 45.0);
144 house.lineTo(x: -45.0, y: -20.0);
145 house.addRect(x: 15.0, y: 5.0, w: 20.0, h: 35.0);
146 house.addRect(x: -35.0, y: -15.0, w: 25.0, h: 25.0);
147
148//! [6]
149 QPainterPath text;
150//! [6]
151 QFont font;
152 font.setPixelSize(50);
153 QRect fontBoundingRect = QFontMetrics(font).boundingRect(text: tr(s: "Qt"));
154 text.addText(point: -QPointF(fontBoundingRect.center()), f: font, text: tr(s: "Qt"));
155
156//! [7]
157 shapes.append(t: clock);
158 shapes.append(t: house);
159 shapes.append(t: text);
160 shapes.append(t: truck);
161
162 connect(sender: shapeComboBox, signal: QOverload<int>::of(ptr: &QComboBox::activated),
163 receiver: this, slot: &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(t: 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

source code of qtbase/examples/widgets/painting/transformations/window.cpp