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Addition, deletion, sort of Labels communicated by events...

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... and LabelTrack listens to its own events, to update certain state.

This is roundabout for now, but that state is view-related and will move into
another class.
This commit is contained in:
Paul Licameli
2018-12-05 14:10:05 -05:00
parent aa5f9550bd
commit 604fbd0a2c
5 changed files with 183 additions and 40 deletions
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52
src/LabelTrack.h
View File

@@ -31,6 +31,7 @@ class DirManager;
class TimeWarper;
class ZoomInfo;
class LabelTrackEvent;
struct LabelTrackHit;
struct TrackPanelDrawingContext;
@@ -102,7 +103,9 @@ const int NUM_GLYPH_CONFIGS = 3;
const int NUM_GLYPH_HIGHLIGHTS = 4;
const int MAX_NUM_ROWS =80;
class AUDACITY_DLL_API LabelTrack final : public Track
class AUDACITY_DLL_API LabelTrack final
: public Track
, public wxEvtHandler
{
friend class LabelTrackView;
friend class LabelStruct;
@@ -253,7 +256,8 @@ public:
int FindPrevLabel(const SelectedRegion& currentSelection);
public:
void SortLabels(LabelTrackHit *pHit = nullptr);
void SortLabels();
private:
TrackKind GetKind() const override { return TrackKind::Label; }
@@ -296,6 +300,10 @@ private:
void calculateFontHeight(wxDC & dc) const;
void RemoveSelectedText();
void OnLabelAdded( LabelTrackEvent& );
void OnLabelDeleted( LabelTrackEvent& );
void OnLabelPermuted( LabelTrackEvent& );
static wxFont msFont;
protected:
@@ -303,4 +311,44 @@ protected:
std::shared_ptr<TrackControls> DoGetControls() override;
};
struct LabelTrackEvent : TrackListEvent
{
explicit
LabelTrackEvent(
wxEventType commandType, const std::shared_ptr<LabelTrack> &pTrack,
const wxString &title,
int formerPosition,
int presentPosition
)
: TrackListEvent{ commandType, pTrack }
, mTitle{ title }
, mFormerPosition{ formerPosition }
, mPresentPosition{ presentPosition }
{}
LabelTrackEvent( const LabelTrackEvent& ) = default;
wxEvent *Clone() const override {
// wxWidgets will own the event object
return safenew LabelTrackEvent(*this); }
wxString mTitle;
// invalid for addition event
int mFormerPosition{ -1 };
// invalid for deletion event
int mPresentPosition{ -1 };
};
// Posted when a label is added.
wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
EVT_LABELTRACK_ADDITION, LabelTrackEvent);
// Posted when a label is deleted.
wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
EVT_LABELTRACK_DELETION, LabelTrackEvent);
// Posted when a label is repositioned in the sequence of labels.
wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
EVT_LABELTRACK_PERMUTED, LabelTrackEvent);
#endif