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/*
* This file is part of diff-pdf.
*
* Copyright (C) 2009 TT-Solutions.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _bmpviewer_h_
#define _bmpviewer_h_
#include <cairo/cairo.h>
#include <wx/image.h>
#include <wx/bitmap.h>
#include <wx/statbmp.h>
#include <wx/scrolwin.h>
#include <wx/event.h>
class Gutter;
// widget for comfortable viewing of a bitmap, with high-quality zooming
class BitmapViewer : public wxScrolledWindow
{
public:
BitmapViewer(wxWindow *parent);
// set the bitmap to be shown
void Set(const wxImage& image);
void Set(cairo_surface_t *surface);
float GetZoom() const
{
return m_zoom_factor;
}
void SetZoom(float factor)
{
m_zoom_factor = factor;
UpdateBitmap();
}
// sets the zoom value to "best fit" for current window size
void SetBestFitZoom();
// attaches a gutter that shows current scrolling position to the window
void AttachGutter(Gutter *g);
private:
// update the content after some change (bitmap, zoom factor, ...)
void UpdateBitmap();
void OnMouseDown(wxMouseEvent& event);
void OnMouseUp(wxMouseEvent& event);
void OnMouseMove(wxMouseEvent& event);
void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
void OnScrolling(wxScrollWinEvent& event);
void OnSizeChanged(wxSizeEvent& event);
private:
wxStaticBitmap *m_content;
wxImage m_orig_image;
float m_zoom_factor;
// is the user currently dragging the page around with the mouse?
bool m_draggingPage;
wxPoint m_draggingLastMousePos;
Gutter *m_gutter;
DECLARE_EVENT_TABLE()
};
#endif // _bmpviewer_h_
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