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50
51#include "renderarea.h"
52
53#include <QPainter>
54
55//! [0]
56RenderArea::RenderArea(const QPainterPath &path, QWidget *parent)
57 : QWidget(parent), path(path)
58{
59 penWidth = 1;
60 rotationAngle = 0;
61 setBackgroundRole(QPalette::Base);
62}
63//! [0]
64
65//! [1]
66QSize RenderArea::minimumSizeHint() const
67{
68 return QSize(50, 50);
69}
70//! [1]
71
72//! [2]
73QSize RenderArea::sizeHint() const
74{
75 return QSize(100, 100);
76}
77//! [2]
78
79//! [3]
80void RenderArea::setFillRule(Qt::FillRule rule)
81{
82 path.setFillRule(rule);
83 update();
84}
85//! [3]
86
87//! [4]
88void RenderArea::setFillGradient(const QColor &color1, const QColor &color2)
89{
90 fillColor1 = color1;
91 fillColor2 = color2;
92 update();
93}
94//! [4]
95
96//! [5]
97void RenderArea::setPenWidth(int width)
98{
99 penWidth = width;
100 update();
101}
102//! [5]
103
104//! [6]
105void RenderArea::setPenColor(const QColor &color)
106{
107 penColor = color;
108 update();
109}
110//! [6]
111
112//! [7]
113void RenderArea::setRotationAngle(int degrees)
114{
115 rotationAngle = degrees;
116 update();
117}
118//! [7]
119
120//! [8]
121void RenderArea::paintEvent(QPaintEvent *)
122{
123 QPainter painter(this);
124 painter.setRenderHint(QPainter::Antialiasing);
125//! [8] //! [9]
126 painter.scale(width() / 100.0, height() / 100.0);
127 painter.translate(50.0, 50.0);
128 painter.rotate(-rotationAngle);
129 painter.translate(-50.0, -50.0);
130
131//! [9] //! [10]
132 painter.setPen(QPen(penColor, penWidth, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
133 QLinearGradient gradient(0, 0, 0, 100);
134 gradient.setColorAt(0.0, fillColor1);
135 gradient.setColorAt(1.0, fillColor2);
136 painter.setBrush(gradient);
137 painter.drawPath(path);
138}
139//! [10]
140