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Home » U++ Library support » U++ Widgets - General questions or Mixed problems » Paint outside Ctrl Rect 
	
		
		
			| Paint outside Ctrl Rect [message #23788] | 
			Sun, 22 November 2009 11:11   | 
		 
		
			
				
				
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						koldo
						 Messages: 3453 Registered: August 2008 
						
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					Senior Veteran  | 
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		Hello all 
 
I have derived a class from Ctrl and I would like to paint outside its Rect, but Ctrl painting clips the painting area to the Ctrl Rect. 
 
Is it a way to disable the Rect clipping in Rect ? 
 
Best regards 
Koldo
		
		
  Best regards 
Iñaki
		
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			| Re: Paint outside Ctrl Rect [message #23819 is a reply to message #23809] | 
			Tue, 24 November 2009 15:01    | 
		 
		
			
				
				
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						mirek
						 Messages: 14271 Registered: November 2005 
						
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					Ultimate Member  | 
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		| koldo wrote on Mon, 23 November 2009 11:36 |   Hello mrjt 
 
Unfortunately the control is clipped too with OverPaint(). 
 
Best regards 
Koldo
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Ctrl view is. Its Frames are not. 
 
Frankly, your request is quite specific, it makes the whole paradigm upside-down. Anyway, we had similar problem in the past as X11 input fields paint outside too. But that is just frame... 
 
In practice, I do no undestand why you would want something like that... It is like requiring regular host platform windows to paint one over another. 
 
But I guess you should be able to reuse frame overpaint to this: 
 
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
struct OverCtrl : public Ctrl, public CtrlFrame {
	virtual void FrameAddSize(Size& sz) {}
	virtual void FrameLayout(Rect& r) {}
	virtual void FramePaint(Draw& w, const Rect& r) {
		w.DrawRect(r.left - 10, r.top - 10, r.GetWidth() + 20, r.GetHeight() + 20, Blue());
		w.DrawRect(r, Red());
	}
	virtual int OverPaint() const { return 10; }
	
	OverCtrl() {
		SetFrame(*this);
	}
};
GUI_APP_MAIN
{
	OverCtrl ctrl;
	TopWindow win;
	
	win.Add(ctrl.LeftPos(40, 40).TopPos(40, 10));
	
	win.Run();
}
 
 
 
Mirek
		
		
		
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			| Re: Paint outside Ctrl Rect [message #23843 is a reply to message #23788] | 
			Thu, 26 November 2009 08:52    | 
		 
		
			
				
				
				
					
						  
						mr_ped
						 Messages: 826 Registered: November 2005  Location: Czech Republic - Praha
						
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					Experienced Contributor  | 
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		The control should adapt to arrow's width, and draw it a tad smaller, so it will end inside rectangle and no clipping will happen. That's the correct way how it should work, but I can see it may be a bit tricky to code that size adjustment by width. 
 
edit: I would probably end with calculating new boundary rectangle as 1/2 of line width inside of the clip rectangle. This way the drawn arrow would be inside the clipping, and like 99+% of available space would be used (but under certain arrow's angles like the one you posted it would not use 100% of available space). But I think visually it would work very well even in this simple way.
		
		
		[Updated on: Thu, 26 November 2009 08:55] Report message to a moderator  
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