To set focus on circumference circles when key is pressed

[soumya]

Hi All,

When key is pressed i need to get a focus on smaller circles which is on the circumference of big circle as shown in the attachment .When i press F11 key it should rotate in anticlockwise directions form right hole to next hole similarly if i press F10 key it should rotate in clockwise direction form right hole to previous hole. I have written the code for it its entering the particular function i am getting the debug message on the console but its not getting focused on smaller circles.

Here is the .cpp code as shown below,

void circleForm::keyPressEvent( QKeyEvent *event )
{
   // qDebug( "Key Press Event" ); 
    switch ( event->key() )
    {
       case Qt::Key_F11:
      	   nextBoltHoleCircle = TRUE;
           break;
      case Qt::Key_F10:
           prevBoltHoleCircle = TRUE;
           break;
    case Qt::Key_Enter:
           needToDrawCircle = TRUE;
           break;
     default:
              QWidget::keyPressEvent(event);
    }  
}
 
 
void circleForm::PaintEvent(QPaintEvent *event){
         QDialog::PaintEvent(event);
                if(needToDrawCircle){
                QPainter painter(this);
                painter.setPen(QPen(Qt::blue, 1, Qt::DashDotDotLine));
                       painter.drawLine(0,180,380,180);//horizontal line
                       painter.drawLine(190,0,190,360);//vertical line
                painter.setPen(QPen(Qt::black, 2, Qt::SolidLine));
 
                int framecentre_x = 190;
                int framecentre_y = 180;
                painter.drawPoint(framecentre_x,framecentre_y);//centrepoint
                painter.drawEllipse(framecentre_x-100,framecentre_y-100,200,200);//big circle(90,80)
                int i;
                double x;
                angle = 360.00/Hol;
                     for(i = 0;i < Hol;i++ ){
                             x = (angle * i);
                             qDebug(" x = %lf\n",x);
                             xangle = (x *  PI)/180;
                             qDebug("xangle = %lf",xangle);
	                     xcordinate = cosine(xangle);
                             qDebug("xcordinate = %lf",xcordinate);
                             yangle = (x *  PI)/180;
                             qDebug("yangle = %lf",yangle);
                             ycordinate = sine(yangle);
                             qDebug("ycordinate = %lf",ycordinate); 
                           painter.setPen(QPen(Qt::black, 2, Qt::SolidLine));
                           painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);//working
                           }
                           painter.setBrush(QBrush(Qt::red, Qt::SolidPattern));
                           painter.drawEllipse((190 + 100 * 1)- 10,(180 + 100 * 0)- 10,20,20);
 
	}
        needToDrawCircle = FALSE;
 
                if(prevBoltHoleCircle){
                   QPainter painter(this);
                        qDebug("painting bolt hole circle\n");
                        qDebug("xcordinate = %lf",xcordinate);
                        qDebug("ycordinate = %lf",ycordinate); 
                        painter.setBrush(QBrush(Qt::blue, Qt::SolidPattern));
                        painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);
                        qDebug("PREVIOUS\n");
 
                 }
                prevBoltHoleCircle = FALSE;
         if(nextBoltHoleCircle){
                QPainter painter(this);
                        qDebug("painting bolt hole circle\n");
                        qDebug("xcordinate = %lf",xcordinate);
                        qDebug("ycordinate = %lf",ycordinate); 
                        painter.setBrush(QBrush(Qt::blue, Qt::SolidPattern));
                        painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);
                        qDebug("NEXT\n");
 
                 }
             nextBoltHoleCircle = FALSE;
}

void circleForm::keyPressEvent( QKeyEvent *event )
{
   // qDebug( "Key Press Event" ); 
    switch ( event->key() )
    {
       case Qt::Key_F11:
      	   nextBoltHoleCircle = TRUE;
           break;
      case Qt::Key_F10:
           prevBoltHoleCircle = TRUE;
           break;
    case Qt::Key_Enter:
           needToDrawCircle = TRUE;
           break;
     default:
              QWidget::keyPressEvent(event);
    }  
}


void circleForm::PaintEvent(QPaintEvent *event){
         QDialog::PaintEvent(event);
                if(needToDrawCircle){
                QPainter painter(this);
                painter.setPen(QPen(Qt::blue, 1, Qt::DashDotDotLine));
                       painter.drawLine(0,180,380,180);//horizontal line
                       painter.drawLine(190,0,190,360);//vertical line
                painter.setPen(QPen(Qt::black, 2, Qt::SolidLine));
              
                int framecentre_x = 190;
                int framecentre_y = 180;
                painter.drawPoint(framecentre_x,framecentre_y);//centrepoint
                painter.drawEllipse(framecentre_x-100,framecentre_y-100,200,200);//big circle(90,80)
                int i;
                double x;
                angle = 360.00/Hol;
                     for(i = 0;i < Hol;i++ ){
                             x = (angle * i);
                             qDebug(" x = %lf\n",x);
                             xangle = (x *  PI)/180;
                             qDebug("xangle = %lf",xangle);
	                     xcordinate = cosine(xangle);
                             qDebug("xcordinate = %lf",xcordinate);
                             yangle = (x *  PI)/180;
                             qDebug("yangle = %lf",yangle);
                             ycordinate = sine(yangle);
                             qDebug("ycordinate = %lf",ycordinate); 
                           painter.setPen(QPen(Qt::black, 2, Qt::SolidLine));
                           painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);//working
                           }
                           painter.setBrush(QBrush(Qt::red, Qt::SolidPattern));
                           painter.drawEllipse((190 + 100 * 1)- 10,(180 + 100 * 0)- 10,20,20);
          
	}
        needToDrawCircle = FALSE;
           
                if(prevBoltHoleCircle){
                   QPainter painter(this);
                        qDebug("painting bolt hole circle\n");
                        qDebug("xcordinate = %lf",xcordinate);
                        qDebug("ycordinate = %lf",ycordinate); 
                        painter.setBrush(QBrush(Qt::blue, Qt::SolidPattern));
                        painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);
                        qDebug("PREVIOUS\n");
                       
                 }
                prevBoltHoleCircle = FALSE;
         if(nextBoltHoleCircle){
                QPainter painter(this);
                        qDebug("painting bolt hole circle\n");
                        qDebug("xcordinate = %lf",xcordinate);
                        qDebug("ycordinate = %lf",ycordinate); 
                        painter.setBrush(QBrush(Qt::blue, Qt::SolidPattern));
                        painter.drawEllipse((190 + 100 * xcordinate)- 10,(180 + 100 * ycordinate)- 10,20,20);
                        qDebug("NEXT\n");
                    
                 }
             nextBoltHoleCircle = FALSE;
}

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Sould i use signal slot mechanism ???..To draw a big circle on the frame i had used signal slot mechanism after entering the value in the lineEdit when i press enter key a circle should be drawn something like this which i have do now when i press F11 it should focus to next circle and if i press F10 it should focus to previous circle.Any help or suggestions

Thanks in advance
Soumya