albaGUIRangeSlider.h

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/*=========================================================================
 
 Program: ALBA (Agile Library for Biomedical Applications)
 Module: albaGUIRangeSlider
 Authors: Silvano Imboden
 
 Copyright (c) BIC
 All rights reserved. See Copyright.txt or
 
 
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef __albaGUIRangeSlider_H__
#define __albaGUIRangeSlider_H__
//----------------------------------------------------------------------------
// Include:
//----------------------------------------------------------------------------
#include "albaObserver.h"
 
class albaGUIRangeSlider : public wxControl 
{
public:
  albaGUIRangeSlider(wxWindow *parent, wxWindowID id, const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = 0, const wxString& name = wxPanelNameStr);
 
  void SetListener(albaObserver *listener) {m_Listener = listener;}
 
   double GetValue(int i) const { return this->m_Value[i]; }
 
  void SetValue(int i, double value);
 
   const double *GetRange() const { return this->m_Range; }
 
  void SetRange(double *range);
 
  void SetRange(double minR, double maxR) { double range[2] = {minR, maxR}; this->SetRange(range); }
 
  void SetNumberOfWidgets(int num) { if (num == this->m_NumberOfWidgets || num < 1 || num > 3) return; this->m_NumberOfWidgets = num; this->Refresh(); }
  
  void EnableCenterWidget(bool enable) { this->m_NumberOfWidgets = (enable) ? 3 : 2; this->Refresh(); }
 
  void EnableBoundaryHandles(bool enable) {this->m_BorderWidgetRadius = (enable) ? 3 : 0; this->Refresh();}
  
  bool IsDragging() const { return this->m_SelectedTriangleWidget != -1 || this->m_SelectedRangeWidget != -1; }
 
protected:
  void Initialize();
   
  void OnPaint(wxPaintEvent &event);
   
  void OnMouse(wxMouseEvent &event);
 
  void OnRangeModified(wxCommandEvent &event);
   
  void RedrawWidgets(wxDC &dc, bool eraseWidgets = false);
 
  void DrawLabel(int x, int y, double val);
 
  double m_Range[2];
  double m_Value[3];
 
  int m_NumberOfWidgets;
  albaObserver *m_Listener;
 
private:
  // ui coordinates
  int m_LineStartX;
  int m_LineStartY;
  int m_LineWidth;
  int m_BorderWidgetRadius;
  wxPoint m_TrianglePosition[3];
 
  static wxPoint m_TriangleWidgetPoints[3];
  static wxPoint m_TriangleWidgetCenter;
  static int     m_TriangleWidgetRadius;
 
  wxPoint m_PrevMousePosition;
  int     m_SelectedTriangleWidget;
  int     m_SelectedRangeWidget;
  wxString m_ValueString;
  wxStaticText *m_RangeValueLabel;
  DECLARE_EVENT_TABLE()
};
#endif // _albaGUIRangeSlider_H_