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88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
#include "CtrlMover.h"
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//returns the offset of a ctrl's drawing area w.r.t. its parent's drawing area
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void CtrlMover::GetOffset(const Ctrl& c, Point& p)
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{
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p += c.GetRect().TopLeft();
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if(c.InView())
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p += c.GetParent()->GetView().TopLeft();
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}
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//returns the offset of a ctrl's drawing area w.r.t an upper parent's drawing area.
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void CtrlMover::GetOffset(const Ctrl& c, const Ctrl& q, Point& p)
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{
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if(&c == &q) return;
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GetOffset(c, p);
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if(Ctrl* pc = c.GetParent())
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GetOffset(*pc, q, p);
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}
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//calculate topleft offset of c w.r. up to par recursively
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Point CtrlMover::GetOffset(const Ctrl& c, const Ctrl& q)
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{
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Point p; p.Clear();
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GetOffset(c, q, p);
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return p;
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}
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void CtrlMover::OnCtrlLeft(Ctrl& c, Point p, dword keyflags)
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{
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if(c.InFrame()) return; //may not move frames
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rc.Remove();
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if(&c == &rc) return;
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if(&c == pctrl) return; //mat not move base
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UpdateAction();
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}
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void CtrlMover::OnRectChange()
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{
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if(!pctrl || !ctrl) { rc.Remove(); return; }
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Rect r = rc.GetData();
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r.Offset(-GetOffset(*ctrl, *pctrl) + ctrl->GetRect().TopLeft());
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ctrl->SetRect(r);
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Action();
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}
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void CtrlMover::OnMissed(Point p, dword keyflags)
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{
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CtrlFinder::LeftDown(p, keyflags);
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}
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void CtrlMover::Updated()
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{
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CtrlFinder::Updated();
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if(!pctrl || !ctrl) { rc.Remove(); return; }
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Add(rc.SizePos());
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//if c is frame: rect in parents window,
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//if is in view, then rect in view area, which itself is subarea of parent
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//using only GetOffset we wouldnt be able to get the rect, only the offset point
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//but we do not need the offset of the drawing area, but the offesstet drawing area itself
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//thats why ctrl->GetParent, it replics part of GetOffset
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//revert the GetRect.TopLeft offset addition, because we specify the rect directly in parent coords
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//be it in parents view or frame, we dont specify it in childrens rect coords
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Rect r = ctrl->GetRect();
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r.Offset(GetOffset(*ctrl, *pctrl) - r.TopLeft());
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rc.SetData(r);
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}
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void CtrlMover::State(int reason)
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{
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if(reason != ENABLE) return;
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if(!IsEnabled()) rc.Remove();
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}
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CtrlMover::CtrlMover()
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{
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WhenLeftDown = THISBACK(OnCtrlLeft);
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rcst = RectCtrl::StyleDefault();
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rcst.rectcol = Null;
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rc.SetStyle(rcst);
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rc <<= THISBACK(OnRectChange);
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rc.WhenMissed = THISBACK(OnMissed);
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}
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