Anitha
13th January 2006, 08:40
Hello,
My application is an MDI and on one of the child windows, i need to draw 1500 rectangles to depict the overall status of the system. The drawing is been done on a jpeg image. The drawing is done fine, but as i go on opening and closing the child windows one by one i get the following X-errors while the app is running :
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c..........
My paintevent code is as below :
void CascadeOverview::paintEvent(QPaintEvent *)
{
static int X1,Y1,X2,Y2;
Y1 = 5;
Y2 = 10;
QImage cascadeBG("./images/cascadebackground.png"); // jpeg image
QPixmap bufferCascadeBG(cascadeBG);
if (paintActualArea->isActive())
paintActualArea->end();
if (paintBufferArea->isActive())
paintBufferArea->end();
paintActualArea->begin(pixmapBackground);
paintBufferArea->begin(&bufferCascadeBG);
paintActualArea->setBrush(green);
paintBufferArea->setBrush(green);
for( int i=0;i<1500;i++)
{
paintActualArea->drawRect(X1,Y1,5,10);
paintBufferArea->drawRect(X1,Y1,5,10);
X1= X1+25;
X2 = X2+25;
if(X1>1250)
{
X1=0;
Y1 = Y1+10;
Y2 = Y2+10;
}
if(X2>1250)
{
X2=0;
Y1 = Y1+10;
Y2 = Y2+10;
}
}
bitBlt (pixmapBackground, 0, 0, &bufferCascadeBG);
paintBufferArea->end();
paintActualArea->end();
}
should i detach the image once painter is ended or is there any specific means to release the graphic objects in qt(like GDI in windows)
Thanks for help in advance,
Anitha.
My application is an MDI and on one of the child windows, i need to draw 1500 rectangles to depict the overall status of the system. The drawing is been done on a jpeg image. The drawing is done fine, but as i go on opening and closing the child windows one by one i get the following X-errors while the app is running :
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c
X Error: BadGC (invalid GC parameter) 13
Major opcode: 66
Minor opcode: 0
Resource id: 0x2e0043c..........
My paintevent code is as below :
void CascadeOverview::paintEvent(QPaintEvent *)
{
static int X1,Y1,X2,Y2;
Y1 = 5;
Y2 = 10;
QImage cascadeBG("./images/cascadebackground.png"); // jpeg image
QPixmap bufferCascadeBG(cascadeBG);
if (paintActualArea->isActive())
paintActualArea->end();
if (paintBufferArea->isActive())
paintBufferArea->end();
paintActualArea->begin(pixmapBackground);
paintBufferArea->begin(&bufferCascadeBG);
paintActualArea->setBrush(green);
paintBufferArea->setBrush(green);
for( int i=0;i<1500;i++)
{
paintActualArea->drawRect(X1,Y1,5,10);
paintBufferArea->drawRect(X1,Y1,5,10);
X1= X1+25;
X2 = X2+25;
if(X1>1250)
{
X1=0;
Y1 = Y1+10;
Y2 = Y2+10;
}
if(X2>1250)
{
X2=0;
Y1 = Y1+10;
Y2 = Y2+10;
}
}
bitBlt (pixmapBackground, 0, 0, &bufferCascadeBG);
paintBufferArea->end();
paintActualArea->end();
}
should i detach the image once painter is ended or is there any specific means to release the graphic objects in qt(like GDI in windows)
Thanks for help in advance,
Anitha.