update() works fine sometime but not everytime..!!

[salmanmanekia]

i have one more question regarding the update and paintEvent(), my program is running fine but when i debug the code i see some unwanted behaviuor actually i want to draw one thing lets call it 'A' initially and wanted to draw other things depending on users input lets say it 'B,C,D...'..
now 'A' should always be drawn no matter what 'B' ,'C' or 'D' is drawn but when i update it redraws A again and again..which is not required ,i only want the paintEvent to draw 'B','C' or 'D' for me not 'A' again and again ..but since it updates the view so to see 'A' again i have to redraw it every time...i want to some how define it in such a way that if 'A' is drawn one time it remains on screen no matter how many other updates are done..
i hope you understand..!!

[wysota]

Can you post your paintEvent()?

[salmanmanekia]

PaintEvent Function:
-----------------------

QPainter painter(this);
painter.setPen(QPen(grayBrush, ....
painter.drawEllipse(OUTER_ELLIPSE_X,...
 
if(trials_completed >= 1)
{
painter.setPen(QPen(greenBrush,30,....
if(trials_completed == 1)
{
qDebug() << "Draws The First Green Sequence ";
..// painting done here
}
else if(trials_completed == 2)
{
qDebug() << "Draws The First Two Green Sequence ";
..// painting done here
}
else if(trials_completed == 3)
{
qDebug() << "Draws The First Three Green Sequence ";
..// painting done here
}
else if(trials_completed == 4)
{
qDebug() << "Draws The Four Green Sequence ";
..
}
}
if (rec_button == FALSE && accept_press == TRUE )
{
..painting done depending on the button press by the user..
}

QPainter painter(this);
painter.setPen(QPen(grayBrush, ....
painter.drawEllipse(OUTER_ELLIPSE_X,...
	
if(trials_completed >= 1)
{
painter.setPen(QPen(greenBrush,30,....
if(trials_completed == 1)
{
qDebug() << "Draws The First Green Sequence ";
..// painting done here
}
else if(trials_completed == 2)
{
qDebug() << "Draws The First Two Green Sequence ";
..// painting done here
}
else if(trials_completed == 3)
{
qDebug() << "Draws The First Three Green Sequence ";
..// painting done here
}
else if(trials_completed == 4)
{
qDebug() << "Draws The Four Green Sequence ";
..
}
}
if (rec_button == FALSE && accept_press == TRUE )
{
..painting done depending on the button press by the user..
}

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[salmanmanekia]

if any other info is required do tell me...

[wysota]

now 'A' should always be drawn no matter what 'B' ,'C' or 'D' is drawn but when i update it redraws A again and again..which is not required

Why is it not required? You said it should be drawn each time.

,i only want the paintEvent to draw 'B','C' or 'D' for me not 'A' again and again ..but since it updates the view so to see 'A' again i have to redraw it every time...i want to some how define it in such a way that if 'A' is drawn one time it remains on screen no matter how many other updates are done..

This is not possible. You have to draw it every time.