ZoomImageCanvas.hh

/* This file is part of the BIAS library (Basic ImageAlgorithmS).
   
   Copyright (C) 2003-2009    (see file CONTACT for details)
   Multimediale Systeme der Informationsverarbeitung
   Institut fuer Informatik
   Christian-Albrechts-Universitaet Kiel
   
   BIAS is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.
   
   BIAS is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public License
   along with BIAS; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#ifndef __ZoomImageCanvas_hh__
#define __ZoomImageCanvas_hh__

#include <bias_config.h>

#ifndef BIAS_HAVE_WXWIDGETS
#  error BIAS_HAVE_WXWIDGETS not defined but required by ZoomImageCanvas. Please enable BIAS_HAVE_WXWIDGETS in CMake configure step.
#endif

#include <Base/Common/BIASpragmaStart.hh>
#include <wx/wx.h>
#include <wx/dcbuffer.h>
#include <Base/Common/BIASpragmaEnd.hh>
#include <Base/Image/Image.hh>


namespace BIAS{

  /** @class ZoomImageCanvas
      @brief 
      @author woelk */
  class BIASGui_EXPORT ZoomImageCanvas : public wxPanel
  {
  public:
    ZoomImageCanvas(wxWindow* parent, wxStatusBar *sbar=NULL, int sbarid=0,
                    wxWindowID id = -1, const wxPoint& pos = wxDefaultPosition,
                    const wxSize& size = wxSize(320, 240),
                    long style = wxTAB_TRAVERSAL,
                    const wxString& name = wxT("ZoomImageCanvas"));
    ~ZoomImageCanvas();

    void NewImage(BIAS::ImageBase& im, BIAS::Image<unsigned char>& ucim);
    void NewCoo(unsigned x, unsigned y);
    void NewZoom(int zoom);

    /**
     * Canvas now uses double buffering to avoid flickering, so it should be ok
     * to always clear the canvas.
     */
    inline void SetClearDrawingContext(bool clear)
    { ClearDrawingContext_=clear; }

  protected:
    void UpdateStatusBar(unsigned x, unsigned y);
    void GetZoomImage();

    void OnResize(wxSizeEvent & event);
    void OnPaint(wxPaintEvent & event);
    void OnMouseMove(wxMouseEvent &event);
    void OnMouseLeave(wxMouseEvent &event);
    void OnRightMouse(wxMouseEvent &event);
    void OnLeftMouse(wxMouseEvent &event);
    void OnKey(wxKeyEvent &event);
    void OnLeftMouseDoubleClicked(wxMouseEvent &event);

    wxBitmap *Bitmap_;
    wxImage *wximage_;
    BIAS::Image<unsigned char> ucim_, zim_;
    BIAS::ImageBase origim_;
    wxStatusBar *SBar_;
    int SBarID_;

    // Canvas now uses double buffering to avoid flickering, so it should be ok
    // to always clear the canvas.
    bool ClearDrawingContext_;

    unsigned ZoomFactor_, ZoomX_, ZoomY_; // zoom coo, set from NewCoo
    // upper left corner of ZoomX_, ZoomY_ in Window_
    unsigned ZoomXPos_, ZoomYPos_;
    int wwidth_, wheight_; // width & height of Window_
    int mousex_, mousey_;

    wxMutex wxbitmap_mutex_, origim_mutex_;

    DECLARE_EVENT_TABLE()
  }; // class ZoomImageCanvas

} // namesape

#endif // __ZoomImageCanvas_hh__