mirror of
https://github.com/cookiengineer/audacity
synced 2026-02-06 03:32:09 +01:00
7c2a531486
... to make it reusable by other classes. Also, don't create a second DC when repainting TrackPanel.
41 lines
903 B
C++
41 lines
903 B
C++
//
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// Overlay.h
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// Audacity
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//
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// Created by Paul Licameli on 5/7/16.
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//
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//
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#ifndef __AUDACITY_OVERLAY__
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#define __AUDACITY_OVERLAY__
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#include <utility>
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class OverlayPanel;
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class wxDC;
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class wxRect;
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class wxSize;
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class Overlay
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{
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public:
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virtual ~Overlay() = 0;
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// nonvirtual wrapper
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std::pair<wxRect, bool> GetRectangle(wxSize size);
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// size passes the dimensions of the backing dc
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// First member of pair is the rectangle that would be erased
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// Second member of pair indicates whether the overlay is out of date
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virtual std::pair<wxRect, bool> DoGetRectangle(wxSize size) = 0;
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// Default implementation blits from backing store over GetRectangle().first
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virtual void Erase(wxDC &dc, wxDC &src);
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// Draw; dc.GetSize() tells you the total dimensions, and the panel is supplied
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// as context
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virtual void Draw(OverlayPanel &panel, wxDC &dc) = 0;
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};
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#endif
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