80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
//
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// OverlayPanel.h
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// Audacity
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//
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// Created by Paul Licameli on 5/1/16.
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//
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//
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#ifndef __AUDACITY_OVERLAY_PANEL__
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#define __AUDACITY_OVERLAY_PANEL__
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#include <memory>
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#include <vector>
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#include "BackedPanel.h" // to inherit
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class Overlay;
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class AUDACITY_DLL_API OverlayPanel /* not final */ : public BackedPanel {
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public:
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OverlayPanel(wxWindow * parent, wxWindowID id,
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const wxPoint & pos,
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const wxSize & size,
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// default as for wxPanel:
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long style = wxTAB_TRAVERSAL | wxNO_BORDER);
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// Registers overlay objects.
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// The sequence in which they were registered is the sequence in
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// which they are painted.
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// OverlayPanel is not responsible for their memory management.
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void AddOverlay( const std::weak_ptr<Overlay> &pOverlay );
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void ClearOverlays();
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// Erases and redraws to the client area the overlays that have
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// been previously added with AddOverlay(). If "repaint_all" is
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// true, all overlays will be erased and re-drawn. Otherwise, only
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// the ones that are out-of-date, as well as the intersecting ones,
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// will be erased and re-drawn.
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// pDC can be null, in which case, DrawOverlays() will create a
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// wxClientDC internally when necessary.
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void DrawOverlays(bool repaint_all, wxDC *pDC = nullptr);
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private:
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using OverlayPtr = std::weak_ptr<Overlay>;
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void Compress();
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std::vector< OverlayPtr > mOverlays;
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DECLARE_EVENT_TABLE()
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friend class GetInfoCommand;
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};
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/// Used to restore pen, brush and logical-op in a DC back to what they were.
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struct AUDACITY_DLL_API DCUnchanger {
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public:
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DCUnchanger() {}
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DCUnchanger(const wxBrush &brush_, const wxPen &pen_, long logicalOperation_)
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: brush(brush_), pen(pen_), logicalOperation(logicalOperation_)
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{}
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void operator () (wxDC *pDC) const;
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wxBrush brush {};
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wxPen pen {};
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long logicalOperation {};
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};
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/// Makes temporary drawing context changes that you back out of, RAII style
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// It's like wxDCPenChanger, etc., but simple and general
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class AUDACITY_DLL_API ADCChanger : public std::unique_ptr<wxDC, ::DCUnchanger>
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{
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using Base = std::unique_ptr<wxDC, ::DCUnchanger>;
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public:
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ADCChanger() : Base{} {}
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ADCChanger(wxDC *pDC);
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};
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#endif
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