59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/**********************************************************************
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Audacity: A Digital Audio Editor
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TrackPanelDrawable.h
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Paul Licameli
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**********************************************************************/
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#ifndef __AUDACITY_TRACK_PANEL_DRAWABLE__
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#define __AUDACITY_TRACK_PANEL_DRAWABLE__
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#include <wx/gdicmn.h> // for wxRect
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struct TrackPanelDrawingContext;
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class wxRect;
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/// \brief Drawing interface common to cells, groups of cells, and temporary handles in CellularPanel
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class AUDACITY_DLL_API TrackPanelDrawable {
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public:
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virtual ~TrackPanelDrawable() = 0;
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// Drawing functions of the subdivision are visited repeatedly in one
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// painting if their areas (as computed by DrawingArea) intersect the
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// panel area, and depending on iPass may overpaint results of previous
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// passes.
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// Drawing function is given the rectangle computed by DrawingArea.
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// iPass counts zero-based up to some limit given to CellularPanel::Draw.
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// Default implementation does nothing.
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virtual void Draw(
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TrackPanelDrawingContext &context, const wxRect &rect, unsigned iPass );
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// For drawing purposes, a cell might require a bigger rectangle than for
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// hit-test purposes, spilling over into other parts of the partition of the
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// panel area.
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// Default implementation returns rect unchanged.
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// TrackPanelContext is passed in because sometimes a drawing context is
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// needed for text extent calculations.
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virtual wxRect DrawingArea(
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TrackPanelDrawingContext &context,
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const wxRect &rect, const wxRect &panelRect, unsigned iPass );
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// Utilities for implementing DrawingArea:
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static inline wxRect MaximizeWidth(
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const wxRect &rect, const wxRect &panelRect ) {
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return { panelRect.x, rect.y, panelRect.width, rect.height };
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}
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static inline wxRect MaximizeHeight(
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const wxRect &rect, const wxRect &panelRect ) {
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return { rect.x, panelRect.y, rect.width, panelRect.height };
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}
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};
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#endif
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