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50
51#include "circlewidget.h"
52#include "window.h"
53
54#include <QtWidgets>
55
56//! [0]
57Window::Window()
58{
59 aliasedLabel = createLabel(text: tr(s: "Aliased"));
60 antialiasedLabel = createLabel(text: tr(s: "Antialiased"));
61 intLabel = createLabel(text: tr(s: "Int"));
62 floatLabel = createLabel(text: tr(s: "Float"));
63
64 QGridLayout *layout = new QGridLayout;
65 layout->addWidget(aliasedLabel, row: 0, column: 1);
66 layout->addWidget(antialiasedLabel, row: 0, column: 2);
67 layout->addWidget(intLabel, row: 1, column: 0);
68 layout->addWidget(floatLabel, row: 2, column: 0);
69//! [0]
70
71//! [1]
72 QTimer *timer = new QTimer(this);
73
74 for (int i = 0; i < 2; ++i) {
75 for (int j = 0; j < 2; ++j) {
76 circleWidgets[i][j] = new CircleWidget;
77 circleWidgets[i][j]->setAntialiased(j != 0);
78 circleWidgets[i][j]->setFloatBased(i != 0);
79
80 connect(sender: timer, signal: &QTimer::timeout,
81 receiver: circleWidgets[i][j], slot: &CircleWidget::nextAnimationFrame);
82
83 layout->addWidget(circleWidgets[i][j], row: i + 1, column: j + 1);
84 }
85 }
86//! [1] //! [2]
87 timer->start(msec: 100);
88 setLayout(layout);
89
90 setWindowTitle(tr(s: "Concentric Circles"));
91}
92//! [2]
93
94//! [3]
95QLabel *Window::createLabel(const QString &text)
96{
97 QLabel *label = new QLabel(text);
98 label->setAlignment(Qt::AlignCenter);
99 label->setMargin(2);
100 label->setFrameStyle(QFrame::Box | QFrame::Sunken);
101 return label;
102}
103//! [3]
104

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