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/////////////////////////////////////////////////////////////////////////////

// Name:        ecscrolwin.h

// Purpose:     ecScrolledWindow class

//              Used here to avoid any harmful changes in the equivalent wxWindows class

// Author:      Julian Smart

// Modified by:

// Created:     01/02/97

// RCS-ID:      $Id: ecscrolwin.h,v 1.2 2002/02/28 18:30:35 julians Exp $

// Copyright:   (c) Julian Smart and Markus Holzem

// Licence:     wxWindows license

/////////////////////////////////////////////////////////////////////////////

#ifndef _EC_SCROLLWIN_H_

#define _EC_SCROLLWIN_H_

#ifdef __GNUG__

    #pragma interface "ecscrolwin.h"

#endif

// ----------------------------------------------------------------------------

// headers and constants

// ----------------------------------------------------------------------------

#include "wx/window.h"

#include "wx/panel.h"

// 1 to use our own scroled window to insulate us from

// wxWindows changes

#if wxRELEASE_NUMBER < 2302

#define ecUSE_OWN_SCROLLED_WINDOW 1

#else

#define ecUSE_OWN_SCROLLED_WINDOW 0

#endif

#if !ecUSE_OWN_SCROLLED_WINDOW

#include "wx/scrolwin.h"

#endif

WXDLLEXPORT_DATA(extern const wxChar*) wxPanelNameStr;

// default scrolled window style

#ifndef wxScrolledWindowStyle

#define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL)

#endif

// ----------------------------------------------------------------------------

// ecScrolledWindow

// ----------------------------------------------------------------------------

#if ecUSE_OWN_SCROLLED_WINDOW

class ecScrolledWindow : public wxPanel

{

public:

    ecScrolledWindow();

    ecScrolledWindow(wxWindow *parent,

                     wxWindowID id = -1,

                     const wxPoint& pos = wxDefaultPosition,

                     const wxSize& size = wxDefaultSize,

                     long style = wxScrolledWindowStyle,

                     const wxString& name = wxPanelNameStr)

    {

        Create(parent, id, pos, size, style, name);

    }

    ~ecScrolledWindow();

    bool Create(wxWindow *parent,

                wxWindowID id,

                const wxPoint& pos = wxDefaultPosition,

                const wxSize& size = wxDefaultSize,

                long style = wxScrolledWindowStyle,

                const wxString& name = wxPanelNameStr);

    // Normally the ecScrolledWindow will scroll itself, but in

    // some rare occasions you might want it to scroll another

    // window (e.g. a child of it in order to scroll only a portion

    // the area between the scrollbars (spreadsheet: only cell area

    // will move).

    virtual void SetTargetWindow( wxWindow *target );

    virtual wxWindow *GetTargetWindow();

    // Number of pixels per user unit (0 or -1 for no scrollbar)

    // Length of virtual canvas in user units

    // Length of page in user units

    virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,

                             int noUnitsX, int noUnitsY,

                             int xPos = 0, int yPos = 0,

                             bool noRefresh = FALSE );

    // Physically scroll the window

    virtual void Scroll(int x_pos, int y_pos);

#if WXWIN_COMPATIBILITY

    virtual void GetScrollUnitsPerPage(int *x_page, int *y_page) const;

    virtual void CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const;

#endif

    int GetScrollPageSize(int orient) const;

    void SetScrollPageSize(int orient, int pageSize);

    virtual void GetScrollPixelsPerUnit(int *x_unit, int *y_unit) const;

    // Enable/disable Windows scrolling in either direction.

    // If TRUE, wxWindows scrolls the canvas and only a bit of

    // the canvas is invalidated; no Clear() is necessary.

    // If FALSE, the whole canvas is invalidated and a Clear() is

    // necessary. Disable for when the scroll increment is used

    // to actually scroll a non-constant distance

    virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);

    // Get the view start

    virtual void GetViewStart(int *x, int *y) const;

    // Compatibility

    void ViewStart(int *x, int *y) const

       { GetViewStart( x, y ); }

    // Actual size in pixels when scrolling is taken into account

    virtual void GetVirtualSize(int *x, int *y) const;

    // Set the scale factor, used in PrepareDC

    void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }

    double GetScaleX() const { return m_scaleX; }

    double GetScaleY() const { return m_scaleY; }

    virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const;

    virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;

    // Adjust the scrollbars

    virtual void AdjustScrollbars(void);

    // Override this function to draw the graphic (or just process EVT_PAINT)

    virtual void OnDraw(wxDC& WXUNUSED(dc)) {};

    // Override this function if you don't want to have ecScrolledWindow

    // automatically change the origin according to the scroll position.

    virtual void PrepareDC(wxDC& dc);

    // implementation from now on

    void OnScroll(wxScrollWinEvent& event);

    void OnSize(wxSizeEvent& event);

    void OnPaint(wxPaintEvent& event);

    void OnChar(wxKeyEvent& event);

    // Calculate scroll increment

    virtual int CalcScrollInc(wxScrollWinEvent& event);

protected:

    wxWindow             *m_targetWindow;

    int                   m_xScrollPixelsPerLine;

    int                   m_yScrollPixelsPerLine;

    bool                  m_xScrollingEnabled;

    bool                  m_yScrollingEnabled;

    int                   m_xScrollPosition;

    int                   m_yScrollPosition;

    int                   m_xScrollLines;

    int                   m_yScrollLines;

    int                   m_xScrollLinesPerPage;

    int                   m_yScrollLinesPerPage;

    double                m_scaleX;

    double                m_scaleY;

private:

    DECLARE_EVENT_TABLE()

#if wxCHECK_VERSION(2, 6, 0)

    DECLARE_DYNAMIC_CLASS(ecScrolledWindow);

#else

    DECLARE_ABSTRACT_CLASS(ecScrolledWindow)

#endif

        };

#else

class ecScrolledWindow : public wxScrolledWindow

{

public:

    ecScrolledWindow(wxWindow *parent,

                     wxWindowID id = -1,

                     const wxPoint& pos = wxDefaultPosition,

                     const wxSize& size = wxDefaultSize,

                     long style = wxScrolledWindowStyle,

                     const wxString& name = wxPanelNameStr)

    {

        Create(parent, id, pos, size, style, name);

    }

    DECLARE_CLASS(ecScrolledWindow)

};

#endif

#endif

    // _EC_SCROLLWIN_H_