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Re: Images not showing and callback not taking lambda [message #50753 is a reply to message #50736]

Tue, 11 December 2018 22:03

Oblivion
Messages: 1094
Registered: August 2007

Senior Contributor

Hello slashupp,

I can see two things:

1) Callback is depreceated. You should be able to use Event<> instead, which is basically an alias for Upp::Function<void()>.
2) Try using Size() instead of Rect() (This means Rect(0, 0, cx, cy), as you're erroneously offseting both the Ctrls AND the images in your code. That's why the images are invisible: x and y values of the images should be 0.

E.g.

struct Thumbnail : public Ctrl //clickable rect with a picture in it
{
	using CLASSNAME=Thumbnail;
	Image pic;
	bool bldn;
	
	//Callback WhenClick; //doesn't want to play nice with lambda ?!?!
	Event<> WhenClick;
	
	
	virtual~Thumbnail(){ }
	Thumbnail() { bldn=false; }
	
	Thumbnail(Image img, Event<> cb, const std::string &desc="") { bldn=false; pic = img; Tip(desc.c_str()); WhenClick=cb; }
	
	virtual void Paint(Draw &drw)
	{
		drw.DrawRect(GetSize(), SColorFace());
		drw.DrawImage((Rect) GetSize(), pic); // means Rect(0, 0, cx, cy);
	}
	virtual void LeftDown(Point p, dword kf) { bldn=true; }
	virtual void LostFocus() { bldn=false; }
	virtual void LeftUp(Point p, dword kf) { if (bldn) if (WhenClick) WhenClick(); }
	
};

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Tue, 11 December 2018 22:11]

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