// $Id: WTreeDrawing.h 113 2008-09-07 15:25:51Z tb $
/*
* STX B+ Tree Demo Program v0.8.3
* Copyright (C) 2008 Timo Bingmann
*
* 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, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _WTreeDrawing_H_
#define _WTreeDrawing_H_
#include <wx/wx.h>
/** The Custom wxScrolledWindow Canvas on which the B+ tree is drawng. It
* supports zooming via mouse wheel and scrolling from wxScrolledWindow. */
class WTreeDrawing : public wxScrolledWindow
{
public:
WTreeDrawing(wxWindow *parent, int id);
/// Used to determine when to update the scroll bars.
wxSize oldTreeSize;
double oldscalefactor;
/// Zoom factor changed by the mouse wheel.
double scalefactor;
/// Set if this windows has focus and draw a faint frame around it.
bool hasfocus;
void OnPaint(wxPaintEvent &pe);
void OnSize(wxSizeEvent &se);
void OnMouseWheel(wxMouseEvent &me);
void OnSetFocus(wxFocusEvent &fe);
void OnKillFocus(wxFocusEvent &fe);
void DrawBTree(wxDC &dc);
/// Tree operation to draw the nodes on this canvas.
struct BTreeOp_Draw
{
BTreeOp_Draw(WTreeDrawing &_w, wxDC &_dc, const class BTreeBundle &_tb)
: w(_w), dc(_dc), tb(_tb)
{
}
WTreeDrawing &w;
wxDC &dc;
const BTreeBundle &tb;
typedef wxSize result_type;
template <class BTreeType>
wxSize draw_node(int offsetx, int offsety, const class BTreeType::btree_impl::node* node);
template <class BTreeType>
wxSize draw_tree(BTreeType &bt);
template <class BTreeType>
wxSize opInteger(BTreeType &bt);
template <class BTreeType>
wxSize opIntegerMulti(BTreeType &bt);
template <class BTreeType>
wxSize opString(BTreeType &bt);
template <class BTreeType>
wxSize opStringMulti(BTreeType &bt);
};
class WMain* wmain;
void SetWMain(class WMain *wm);
DECLARE_EVENT_TABLE();
};
#endif // _WTreeDrawing_H_
