C++ SystemDraw::IsPainting方法代码示例

void Ctrl::GatherTransparentAreas(Vector<Rect>& area, SystemDraw& w, Rect r, const Rect& clip)
{
	GuiLock __;
	LTIMING("GatherTransparentAreas");
	Point off = r.TopLeft();
	Point viewpos = off + GetView().TopLeft();
	r.Inflate(overpaint);
	Rect notr = GetVoidRect();
	if(notr.IsEmpty())
		notr = GetOpaqueRect();
	notr += viewpos;
	if(!IsShown() || r.IsEmpty() || !clip.Intersects(r) || !w.IsPainting(r))
		return;
	if(notr.IsEmpty())
		CombineArea(area, r & clip);
	else {
		if(notr != r) {
			CombineArea(area, clip & Rect(r.left, r.top, notr.left, r.bottom));
			CombineArea(area, clip & Rect(notr.right, r.top, r.right, r.bottom));
			CombineArea(area, clip & Rect(notr.left, r.top, notr.right, notr.top));
			CombineArea(area, clip & Rect(notr.left, notr.bottom, notr.right, r.bottom));
		}
		for(Ctrl *q = firstchild; q; q = q->next) {
			Point qoff = q->InView() ? viewpos : off;
			Rect qr = q->GetRect() + qoff;
			if(clip.Intersects(qr))
				q->GatherTransparentAreas(area, w, qr, clip);
		}
	}
}

bool Ctrl::PaintOpaqueAreas(SystemDraw& w, const Rect& r, const Rect& clip, bool nochild)
{
	GuiLock __;
	LTIMING("PaintOpaqueAreas");
	if(!IsShown() || r.IsEmpty() || !r.Intersects(clip) || !w.IsPainting(r))
		return true;
	Point off = r.TopLeft();
	Point viewpos = off + GetView().TopLeft();
	if(backpaint == EXCLUDEPAINT)
		return w.ExcludeClip(r);
	Rect cview = clip & (GetView() + off);
	for(Ctrl *q = lastchild; q; q = q->prev)
		if(!q->PaintOpaqueAreas(w, q->GetRect() + (q->InView() ? viewpos : off),
		                        q->InView() ? cview : clip))
			return false;
	if(nochild && (lastchild || GetNext()))
		return true;
	Rect opaque = (GetOpaqueRect() + viewpos) & clip;
	if(opaque.IsEmpty())
		return true;
#ifdef SYSTEMDRAW
	if(backpaint == FULLBACKPAINT && !dynamic_cast<BackDraw *>(&w))
#else
	if(backpaint == FULLBACKPAINT && !w.IsBack())
#endif
	{
		ShowRepaintRect(w, opaque, LtRed());
		BackDraw bw;
		bw.Create(w, opaque.GetSize());
		bw.Offset(viewpos - opaque.TopLeft());
		bw.SetPaintingDraw(w, opaque.TopLeft());
		{
			LEVELCHECK(bw, this);
			Paint(bw);
			PaintCaret(bw);
		}
		bw.Put(w, opaque.TopLeft());
	}
	else {
		w.Clip(opaque);
		ShowRepaintRect(w, opaque, Green());
		w.Offset(viewpos);
		{
			LEVELCHECK(w, this);
			Paint(w);
			PaintCaret(w);
		}
		w.End();
		w.End();
	}
	LLOG("Exclude " << opaque);
	return w.ExcludeClip(opaque);
}

void Ctrl::CtrlPaint(SystemDraw& w, const Rect& clip) {
	GuiLock __;
	LEVELCHECK(w, this);
	LTIMING("CtrlPaint");
	Rect rect = GetRect().GetSize();
	Rect orect = rect.Inflated(overpaint);
	if(!IsShown() || orect.IsEmpty() || clip.IsEmpty() || !clip.Intersects(orect))
		return;
	Ctrl *q;
	Rect view = rect;
	for(int i = 0; i < frame.GetCount(); i++) {
		LEVELCHECK(w, NULL);
		frame[i].frame->FramePaint(w, view);
		view = frame[i].view;
	}
	Rect oview = view.Inflated(overpaint);
	bool hasviewctrls = false;
	bool viewexcluded = false;
	for(q = firstchild; q; q = q->next)
		if(q->IsShown())
			if(q->InFrame()) {
				if(!viewexcluded && IsTransparent() && q->GetRect().Intersects(view)) {
					w.Begin();
					w.ExcludeClip(view);
					viewexcluded = true;
				}
				LEVELCHECK(w, q);
				Point off = q->GetRect().TopLeft();
				w.Offset(off);
				q->CtrlPaint(w, clip - off);
				w.End();
			}
			else
				hasviewctrls = true;
	if(viewexcluded)
		w.End();
	DOLEVELCHECK;
	if(!oview.IsEmpty()) {
		if(oview.Intersects(clip) && w.IsPainting(oview)) {
			LEVELCHECK(w, this);
			if(overpaint) {
				w.Clip(oview);
				w.Offset(view.left, view.top);
				Paint(w);
				PaintCaret(w);
				w.End();
				w.End();
			}
			else {
				w.Clipoff(view);
				Paint(w);
				PaintCaret(w);
				w.End();
			}
		}
	}
	if(hasviewctrls && !view.IsEmpty()) {
		Rect cl = clip & view;
		w.Clip(cl);
		for(q = firstchild; q; q = q->next)
			if(q->IsShown() && q->InView()) {
				LEVELCHECK(w, q);
				Rect qr = q->GetRect();
				Point off = qr.TopLeft() + view.TopLeft();
				Rect ocl = cl - off;
				if(ocl.Intersects(Rect(qr.GetSize()).Inflated(overpaint))) {
					w.Offset(off);
					q->CtrlPaint(w, cl - off);
					w.End();
				}
			}
		w.End();
	}
}