draing plugin on parent widget in qt-designer 4.5.3

[dresha48]

I created plugin which draws cross on parent widget. In constructor:

mAim=new HmiAim(this->parentWidget());

mAim=new HmiAim(this->parentWidget());

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In header(description of class):

...

HmiAim *mAim;
}
class HmiAim:public QWidget
{
	Q_OBJECT
protected:
	virtual void paintEvent(QPaintEvent *event);   
};

HmiAim *mAim;
}
class HmiAim:public QWidget
{
	Q_OBJECT
protected:
	virtual void paintEvent(QPaintEvent *event);   
};

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And paint event:

void 
HmiAim::paintEvent(QPaintEvent *event)
{
	QPainter painter(this);
	QPen pen;
	pen.setColor(QColor (225,104,15));
	pen.setWidth(2);
	painter.setPen(pen);
	painter.drawLine(0,15,30, 15);
	painter.drawLine(15,0, 15, 30);
}

void 
HmiAim::paintEvent(QPaintEvent *event)
{
	QPainter painter(this);
	QPen pen;
	pen.setColor(QColor (225,104,15));
	pen.setWidth(2);
	painter.setPen(pen);
	painter.drawLine(0,15,30, 15);
	painter.drawLine(15,0, 15, 30);
}

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It works everywhere ,exept designer(works in preview,in projects). It even works in designer if I save UI-file with this plugin and open it - cross will be and in designer mode for saved plagins, but not for new added.

[wysota]

Did you implement sizeHint() for your widget?

[dresha48]

Did you implement sizeHint() for your widget?

No, but how sizeHint can help?

[wysota]

If your widget is of size (0,0) then it may be hard to see it. I don't know if that's the problem here but you should definitely implement sizeHint() and rule this one out.

[dresha48]

If your widget is of size (0,0) then it may be hard to see it. I don't know if that's the problem here but you should definitely implement sizeHint() and rule this one out.

No - I set fixed size for this widget. And there is part which always drawn, but it draws for plugin - not for parent

[wysota]

You are drawing on the widget not on its parent in your code. Right?

[dresha48]

You are drawing on the widget not on its parent in your code. Right?

One part is drawing on widget(always work) and one on parent(always, exept new plugins in QT-designer) - there is two paint events for it.

[wysota]

Two paint events? How come? A widget can't draw on other widgets using paint events. It can only install an event filter.

[dresha48]

Two paint events? How come? A widget can't draw on other widgets using paint events. It can only install an event filter.

There is 2 classes in plugin and 2 paint events for them .

[wysota]

Please show us the code.

[dresha48]

Please show us the code.

Ok - files are attached .