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contextinfo: Make it more responsive and improve error handling

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Change-Id: If05cd906edc8b7f1fd4744d8d0a392aeec46a454
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
This commit is contained in:
Laszlo Agocs 2014-03-07 12:56:13 +01:00 committed by The Qt Project
parent 6a9f917b6a
commit 406290856d
1 changed files with 7 additions and 2 deletions
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9
examples/opengl/contextinfo/renderwindow.cpp
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@ -174,7 +174,7 @@ void RenderWindow::setupVertexAttribs()
void RenderWindow::render() void RenderWindow::render()
{ {
if (!m_context->makeCurrent(this)) { if (!m_context->makeCurrent(this)) {
qWarning("makeCurrent() failed"); emit error(tr("makeCurrent() failed"));
return; return;
} }
@ -216,5 +216,10 @@ void RenderWindow::render()
m_context->swapBuffers(this); m_context->swapBuffers(this);
m_angle += 1.0f; m_angle += 1.0f;
QTimer::singleShot(0, this, SLOT(render()));
// Instead of 0 wait a few more milliseconds before rendering again. This is
// only here to make the UI widgets more responsive on slower machines. We
// can afford it since our rendering is so lightweight.
const int interval = 5;
QTimer::singleShot(interval, this, SLOT(render()));
} }