summaryrefslogtreecommitdiffstats
path: root/examples/opengl/2dpainting/glwidget.cpp
blob: 9351c657df5e42cb8c7d1f53eda013aac1ed05b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#include "glwidget.h"
#include "helper.h"

#include <QPainter>
#include <QTimer>

//! [0]
GLWidget::GLWidget(Helper *helper, QWidget *parent)
    : QOpenGLWidget(parent), helper(helper)
{
    elapsed = 0;
    setFixedSize(200, 200);
    setAutoFillBackground(false);
}
//! [0]

//! [1]
void GLWidget::animate()
{
    elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
    update();
}
//! [1]

//! [2]
void GLWidget::paintEvent(QPaintEvent *event)
{
    QPainter painter;
    painter.begin(this);
    painter.setRenderHint(QPainter::Antialiasing);
    helper->paint(&painter, event, elapsed);
    painter.end();
}
//! [2]