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50
51#include <QtWidgets>
52#include "displaywidget.h"
53
54DisplayWidget::DisplayWidget(QWidget *parent)
55 : QWidget(parent)
56{
57 QPainterPath car;
58 QPainterPath house;
59
60 QFile file(":resources/shapes.dat");
61 file.open(flags: QFile::ReadOnly);
62 QDataStream stream(&file);
63 stream >> car >> house >> tree >> moon;
64 file.close();
65
66 shapeMap[Car] = car;
67 shapeMap[House] = house;
68
69 background = Sky;
70 shapeColor = Qt::darkYellow;
71 shape = House;
72}
73
74//! [paint event]
75void DisplayWidget::paintEvent(QPaintEvent * /* event */)
76{
77 QPainter painter;
78 painter.begin(this);
79 painter.setRenderHint(hint: QPainter::Antialiasing);
80 paint(painter);
81 painter.end();
82}
83//! [paint event]
84
85//! [paint function]
86void DisplayWidget::paint(QPainter &painter)
87{
88//![paint picture]
89 painter.setClipRect(QRect(0, 0, 200, 200));
90 painter.setPen(Qt::NoPen);
91
92 switch (background) {
93 case Sky:
94 default:
95 painter.fillRect(r: QRect(0, 0, 200, 200), c: Qt::darkBlue);
96 painter.translate(dx: 145, dy: 10);
97 painter.setBrush(Qt::white);
98 painter.drawPath(path: moon);
99 painter.translate(dx: -145, dy: -10);
100 break;
101 case Trees:
102 {
103 painter.fillRect(r: QRect(0, 0, 200, 200), c: Qt::darkGreen);
104 painter.setBrush(Qt::green);
105 painter.setPen(Qt::black);
106 for (int y = -55, row = 0; y < 200; y += 50, ++row) {
107 int xs;
108 if (row == 2 || row == 3)
109 xs = 150;
110 else
111 xs = 50;
112 for (int x = 0; x < 200; x += xs) {
113 painter.save();
114 painter.translate(dx: x, dy: y);
115 painter.drawPath(path: tree);
116 painter.restore();
117 }
118 }
119 break;
120 }
121 case Road:
122 painter.fillRect(r: QRect(0, 0, 200, 200), c: Qt::gray);
123 painter.setPen(QPen(Qt::white, 4, Qt::DashLine));
124 painter.drawLine(line: QLine(0, 35, 200, 35));
125 painter.drawLine(line: QLine(0, 165, 200, 165));
126 break;
127 }
128
129 painter.setBrush(shapeColor);
130 painter.setPen(Qt::black);
131 painter.translate(dx: 100, dy: 100);
132 painter.drawPath(path: shapeMap[shape]);
133//![paint picture]
134}
135//! [paint function]
136
137QColor DisplayWidget::color() const
138{
139 return shapeColor;
140}
141
142void DisplayWidget::setBackground(Background background)
143{
144 this->background = background;
145 update();
146}
147
148void DisplayWidget::setColor(const QColor &color)
149{
150 this->shapeColor = color;
151 update();
152}
153
154void DisplayWidget::setShape(Shape shape)
155{
156 this->shape = shape;
157 update();
158}
159

source code of qtsvg/examples/svg/svggenerator/displaywidget.cpp