WaveChannelVZoomHandle.cpp

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
WaveChannelVZoomHandle.cpp
 
Paul Licameli split from TrackPanel.cpp
 
**********************************************************************/
 
 
#include "WaveChannelVZoomHandle.h"
 
#include "../../../ui/ChannelVRulerControls.h"
 
#include "../../../../HitTestResult.h"
#include "Project.h"
#include "../../../../RefreshCode.h"
#include "../../../../TrackArtist.h"
#include "../../../../TrackPanelMouseEvent.h"
#include "WaveTrack.h"
#include "../../../../../images/Cursors.h"
 
bool WaveChannelVZoomHandle::IsDragZooming(int zoomStart, int zoomEnd, bool hasDragZoom)
{
   const int DragThreshold = 3;// Anything over 3 pixels is a drag, else a click.
   return hasDragZoom && (abs(zoomEnd - zoomStart) > DragThreshold);
}
 
// Table class
 
void WaveChannelVRulerMenuTable::InitUserData(void *pUserData)
{
   mpData = static_cast<InitMenuData*>(pUserData);
}
 
 
void WaveChannelVRulerMenuTable::OnZoom(
   WaveChannelViewConstants::ZoomActions iZoomCode)
{
   mpData->doZoom(
      &mpData->project, mpData->wc,
      iZoomCode, mpData->rect, mpData->yy, mpData->yy, false
   );
 
   using namespace RefreshCode;
   mpData->result = UpdateVRuler | RefreshAll;
}
 
void WaveChannelVRulerMenuTable::UpdatePrefs()
{
   // Because labels depend on advanced vertical zoom setting
   PopupMenuTable::Clear();
}
 
 
HitTestPreview WaveChannelVZoomHandle::HitPreview(const bool bVZoom)
{
   static wxCursor crossCursor{wxCURSOR_CROSS};
   static  wxCursor arrowCursor{ wxCURSOR_ARROW };
   const auto message = bVZoom ? 
      XO("Drag to specify a zoom region. Right-click for menu. Ctrl+scroll to zoom.") :
      XO("Right-click for menu. Ctrl+scroll to zoom.");
 
   return {
      message,
      bVZoom ? &crossCursor : &arrowCursor
      // , message
   };
}
 
UIHandle::Result WaveChannelVZoomHandle::DoDrag(
   const TrackPanelMouseEvent &evt, AudacityProject *pProject,
   const int zoomStart, int &zoomEnd, bool hasDragZooming)
{
   using namespace RefreshCode;
 
   const wxMouseEvent &event = evt.event;
   if ( event.RightIsDown() )
      return RefreshNone;
   zoomEnd = event.m_y;
   if (IsDragZooming( zoomStart, zoomEnd, hasDragZooming))
      return RefreshAll;
   return RefreshNone;
}
 
UIHandle::Result WaveChannelVZoomHandle::DoRelease(
   const TrackPanelMouseEvent &evt, AudacityProject *pProject,
   wxWindow *pParent, WaveChannel &wc, const wxRect &rect,
   DoZoomFunction doZoom, PopupMenuTable &table,
   int zoomStart, int zoomEnd)
{
   using namespace RefreshCode;
   const wxMouseEvent &event = evt.event;
   const bool shiftDown = event.ShiftDown();
   const bool rightUp = event.RightUp();
 
 
   // Popup menu...
   using namespace WaveChannelViewConstants;
   if (
       rightUp &&
       !(event.ShiftDown() || event.CmdDown()))
   {
      WaveChannelVRulerMenuTable::InitMenuData data {
         *pProject,
         wc, rect, RefreshCode::RefreshNone, event.m_y, doZoom };
 
      auto pMenu = PopupMenuTable::BuildMenu( &table, &data );
      pMenu->Popup( *pParent, { event.m_x, event.m_y } );
 
      return data.result;
   }
   else {
      // Ignore Capture Lost event 
      bool notLost = event.GetId() != kCaptureLostEventId;
      // Shift+rightclick to reset zoom
      if( shiftDown && notLost)
         zoomStart = zoomEnd;
      doZoom(pProject, wc, kZoom1to1,
         rect, zoomStart, zoomEnd, !shiftDown);
      
   }
 
   return UpdateVRuler | RefreshAll;
}
 
void WaveChannelVZoomHandle::DoDraw(
   TrackPanelDrawingContext &context,
   const wxRect &rect, unsigned iPass, const int zoomStart, const int zoomEnd, bool hasDragZoom)
{
   if (iPass == TrackArtist::PassZooming) {
      if (IsDragZooming(zoomStart, zoomEnd, hasDragZoom))
         ChannelVRulerControls::DrawZooming(context, rect, zoomStart, zoomEnd);
   }
}
 
wxRect WaveChannelVZoomHandle::DoDrawingArea(
   const wxRect &rect, const wxRect &panelRect, unsigned iPass)
{
   if (iPass == TrackArtist::PassZooming)
      return ChannelVRulerControls::ZoomingArea(rect, panelRect);
   else
      return rect;
}