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Re: Display transparent paper [message #58052 is a reply to message #58051]

Sun, 30 January 2022 18:14

Lance
Messages: 656
Registered: March 2007

Contributor

Silvan:

Dig a little into Upp source code, I find something like this

void Display::PaintBackground(Draw& w, const Rect& r, const Value& q,
                              Color ink, Color paper, dword style) const
{
	if(IsType<AttrText>(q)) {
		const AttrText& t = ValueTo<AttrText>(q);
		if(!IsNull(t.paper))
			paper = t.paper;
		if(!IsNull(t.normalpaper) && !(style & (CURSOR|SELECT|READONLY)))
			paper = t.normalpaper;
	}
	w.DrawRect(r, paper);
}

void Display::Paint(Draw& w, const Rect& r, const Value& q, Color ink, Color paper, dword style) const
{
	PaintBackground(w, r, q, ink, paper, style);
	Single<StdDisplayClass>().Paint0(w, r, q, ink, paper, style);
}

Do you want to try set both paper for AttrText and the Paint parameter to Null and see if you get what you want. Obviously when you set the paper color of AttrText to Null, then the paper color of passed in parameter to funciton Display::Paint will be used. I am not quite sure if set it to Null will make a do nothing DrawRect. I think its the only reasonable result, but before actually test it, I cannot really tell for sure.

HTH,
Lance

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