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Code Issues Projects Releases Packages Wiki Activity Actions

Support for an idle render time step.

Browse source 
The basics of this is, if the application has changed its active state
then we only call paintGL every N milliseconds.  Currently the default
time step is 100 milliseconds.
This commit is contained in:
Geenz 2014-03-12 19:10:26 -04:00
parent e249b29b45
commit 9c61f12926
2 changed files with 35 additions and 2 deletions
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29
interface/src/GLCanvas.cpp
View file

@ -12,17 +12,21 @@
#include <QMimeData>
#include <QUrl>
GLCanvas::GLCanvas() : QGLWidget(QGLFormat(QGL::NoDepthBuffer, QGL::NoStencilBuffer)) {
GLCanvas::GLCanvas() : QGLWidget(QGLFormat(QGL::NoDepthBuffer, QGL::NoStencilBuffer)), _throttleRendering(false), _idleRenderInterval(100) {
}
void GLCanvas::initializeGL() {
Application::getInstance()->initializeGL();
setAttribute(Qt::WA_AcceptTouchEvents);
setAcceptDrops(true);
connect(Application::getInstance(), &Application::focusChanged, this, &GLCanvas::activeChanged);
connect(&_frameTimer, &QTimer::timeout, this, &GLCanvas::throttleRender);
}
void GLCanvas::paintGL() {
Application::getInstance()->paintGL();
if (!_throttleRendering) {
Application::getInstance()->paintGL();
}
}
void GLCanvas::resizeGL(int width, int height) {
@ -49,6 +53,27 @@ void GLCanvas::mouseReleaseEvent(QMouseEvent* event) {
Application::getInstance()->mouseReleaseEvent(event);
}
void GLCanvas::activeChanged()
{
if (!isActiveWindow())
{
if (!_throttleRendering)
{
_frameTimer.start(_idleRenderInterval);
_throttleRendering = true;
}
} else {
_frameTimer.stop();
_throttleRendering = false;
}
}
void GLCanvas::throttleRender()
{
_frameTimer.start(_idleRenderInterval);
Application::getInstance()->paintGL();
}
int updateTime = 0;
bool GLCanvas::event(QEvent* event) {
switch (event->type()) {

8
interface/src/GLCanvas.h
View file

@ -10,6 +10,7 @@
#define __hifi__GLCanvas__
#include <QGLWidget>
#include <QTimer>
/// customized canvas that simply forwards requests/events to the singleton application
class GLCanvas : public QGLWidget {
@ -17,6 +18,10 @@ public:
GLCanvas();
protected:
QTimer _frameTimer;
bool _throttleRendering;
int _idleRenderInterval;
virtual void initializeGL();
virtual void paintGL();
virtual void resizeGL(int width, int height);
@ -34,6 +39,9 @@ protected:
virtual void dragEnterEvent(QDragEnterEvent *event);
virtual void dropEvent(QDropEvent* event);
void activeChanged();
void throttleRender();
};
#endif /* defined(__hifi__GLCanvas__) */