[Qgis-developer] drawing of points on canvas after a time period

[Martin Dobias]

On 5/12/06, nitin quick <quick.nitin at gmail.com> wrote:
> hello everybody,
> here is a piece o code i am presenting for help. It is supposed to put
> points on canvas after a interval. Co-ordinate point are store in a 2d
> matrix a[][].canvas is object refrence to QCanvas class .
>  void addPoint()
> {
>  QPixmap bck=canvas.backGround();
>  QPixmap *tpix=new QPixmap(canvas.width(),canvas.height());
>  QPainter p;
>  QRect r(0,0,canvas.width(),canvas.height());
>  QPoint pt(0,0);
>  p.begin(tpix);
> for (int i=0; i<10;i++)
> for(int j=0; j<10; j++)
> {
>  p.fillRect(0,0,canvas.width(),canvas.height(),Qt::white);
>  p.setPen(Qt::red);
>  p.drawEllipse(a[i][j],a[i][j],3,3);
>  bitblt(&bck,pt,tpix,r,Qt::AndROP);
>  canvas.setBackGround(bck);
>  sleep(1);
> }
> p.end;
> }
>
>
> but this code is printing line in one go only after waiting for some time.
> What iwant is i can view plotting of each point aftera interval( here i put
> 1 in sleep) ;

Hi,
do you have still problem with this? Probably Qt-interest is a better
list to seek help on this topic...

Bye,
Martin

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