[QGLWidget/QGLView][QSplitter] slow performance?

[faizol]

Hi all,

What should I do to speed up the resizing performance?

#include <QApplication>
#include <QGLWidget>
#include <QMainWindow>
#include <QSplitter>
#include <QTextEdit>
 
class GLWidget : public QGLWidget
{
public:
    GLWidget(QWidget *parent = 0) : QGLWidget(parent) {}
    GLWidget(const QGLFormat &format, QWidget *parent = 0, const QGLWidget *shareWidget = 0, Qt::WindowFlags f = 0) :
    QGLWidget(format, parent, shareWidget, f){}
 
protected:
    virtual void paintGL();
    virtual void resizeGL(int, int)  { }
};
 
void GLWidget :: paintGL()
{
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);  
    glLoadIdentity();            
 
    glTranslatef(0.5f,0.5f,0.0f);
 
    glBegin(GL_QUADS);                      	
        glVertex3f(-1.0f, 1.0f, 0.0f);         
        glVertex3f( 1.0f, 1.0f, 0.0f);         
        glVertex3f( 1.0f,-1.0f, 0.0f);         
        glVertex3f(-1.0f,-1.0f, 0.0f);         
    glEnd();
}
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
 
    QMainWindow mainwindow;
 
    mainwindow.setFixedSize(1000,600);	
 
    QSplitter *splitter = new QSplitter(Qt::Horizontal);
    splitter->addWidget(new QTextEdit());     
    splitter->addWidget(new GLWidget());
 
    mainwindow.setCentralWidget(splitter);
 
    mainwindow.show();
 
    return app.exec();  
}

#include <QApplication>
#include <QGLWidget>
#include <QMainWindow>
#include <QSplitter>
#include <QTextEdit>
     
class GLWidget : public QGLWidget
{
public:
    GLWidget(QWidget *parent = 0) : QGLWidget(parent) {}
    GLWidget(const QGLFormat &format, QWidget *parent = 0, const QGLWidget *shareWidget = 0, Qt::WindowFlags f = 0) :
    QGLWidget(format, parent, shareWidget, f){}
     
protected:
    virtual void paintGL();
    virtual void resizeGL(int, int)  { }
};

void GLWidget :: paintGL()
{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);  
    glLoadIdentity();            

    glTranslatef(0.5f,0.5f,0.0f);

    glBegin(GL_QUADS);                      	
        glVertex3f(-1.0f, 1.0f, 0.0f);         
        glVertex3f( 1.0f, 1.0f, 0.0f);         
        glVertex3f( 1.0f,-1.0f, 0.0f);         
        glVertex3f(-1.0f,-1.0f, 0.0f);         
    glEnd();
}
     
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
     
    QMainWindow mainwindow;
	
    mainwindow.setFixedSize(1000,600);	
     
    QSplitter *splitter = new QSplitter(Qt::Horizontal);
    splitter->addWidget(new QTextEdit());     
    splitter->addWidget(new GLWidget());
 
    mainwindow.setCentralWidget(splitter);

    mainwindow.show();
     
    return app.exec();  
}

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Thanks in advance.

Cheers,
Faizol

[wysota]

Please define "speed up".