Use QOpenGLWigdet in QGraphicsView, display will be displayed after hiding, update will not refresh
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The following is the constructor code that inherits the QGraphicsView class, using QOpenGLWidget:
M_scene = new QGraphicsScene( this );
setScene( m_scene );
setViewport(new QOpenGLWidget(this));Call setHidden(true) in other Widgets, and then set to false, call update will not refresh
It is normal to not use opengl.
//setViewport(new QOpenGLWidget(this));
This problem will also appear on the PC and Android platforms, please help confirm what is the reason. Thank you!
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Hi and welcome to devnet,
What version of Qt are you using ?
What exact OS version are you running your application from ?
Can you provide a minimal compilable example that shows that behaviour ? -
Qt 5.12.2 (i386-little_endian-ilp32 shared (dynamic) release build; by MSVC 2017) on "windows"
OS: Windows 7 SP 1 (6.1) [winnt version 6.1.7601]
I am using an open source project, qflightinstruments-20180421, just modified to opengl way, I provide the entire project directly.
[0_1558000009369_src.zip](Uploading 100%)
In line 102 of qfi_PFD.cpp, setViewport uses openGLWidget, the following is part of the code
qfi_PFD::qfi_PFD( QWidget * parent ) :
QGraphicsView ( parent ),
......
{
Reset();M_scene = new QGraphicsScene( this );
setScene( m_scene );//use openGLwidget
setViewport(new QOpenGLWidget(this));M_scene->clear();
......
Init();
}In the 213 line of MainWindow.cpp, the update display, hidden and displayed in 222 lines per second, the following is part of the code
Void MainWindow::timerEvent( QTimerEvent *event )
{
/////////////////////////////////////
QMainWindow::timerEvent( event );
/////////////////////////////////////......
M_ui->widgetPFD->update();
Qint64 time2 = QDateTime::currentMSecsSinceEpoch();
If( time2 - m_time1 > 1000 )
{
qDebug()<<m_time1<<time2<<m_steps;
M_time1 = time2;
M_steps = 0;
M_ui->widgetPFD->setTestHidden();}
The following are hidden and show functions
Inline void setTestHidden()
{
setHidden(!isHidden());
} -
Qt 5.12.2 (i386-little_endian-ilp32 shared (dynamic) release build; by MSVC 2017) on "windows"
OS: Windows 7 SP 1 (6.1) [winnt version 6.1.7601]
I am using an open source project, qflightinstruments-20180421, just modified to opengl way, I provide the entire project directly.
[0_1558000009369_src.zip](Uploading 100%)
In line 102 of qfi_PFD.cpp, setViewport uses openGLWidget, the following is part of the code
qfi_PFD::qfi_PFD( QWidget * parent ) :
QGraphicsView ( parent ),
......
{
Reset();M_scene = new QGraphicsScene( this );
setScene( m_scene );//use openGLwidget
setViewport(new QOpenGLWidget(this));M_scene->clear();
......
Init();
}In the 213 line of MainWindow.cpp, the update display, hidden and displayed in 222 lines per second, the following is part of the code
Void MainWindow::timerEvent( QTimerEvent *event )
{
/////////////////////////////////////
QMainWindow::timerEvent( event );
/////////////////////////////////////......
M_ui->widgetPFD->update();
Qint64 time2 = QDateTime::currentMSecsSinceEpoch();
If( time2 - m_time1 > 1000 )
{
qDebug()<<m_time1<<time2<<m_steps;
M_time1 = time2;
M_steps = 0;
M_ui->widgetPFD->setTestHidden();}
The following are hidden and show functions
Inline void setTestHidden()
{
setHidden(!isHidden());
}@David-Tang You can't upload files here.
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