src/generic/scrolwin.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        scrolwin.cpp
// Purpose:     wxScrolledWindow implementation
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:   	wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#pragma implementation "scrolwin.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/utils.h"
#include "wx/dcclient.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/generic/scrolwin.h"
#include "wx/panel.h"

#if !USE_SHARED_LIBRARY
BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
    EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
    EVT_SIZE(wxScrolledWindow::OnSize)
    EVT_PAINT(wxScrolledWindow::OnPaint)
END_EVENT_TABLE()

IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
#endif

#ifdef __WXMSW__
#include "windows.h"
#endif

#ifdef __WXMOTIF__
// For wxRETAINED implementation
#include <Xm/Xm.h>
#endif

wxScrolledWindow::wxScrolledWindow()
{
    m_xScrollPixelsPerLine = 0;
    m_yScrollPixelsPerLine = 0;
    m_xScrollingEnabled = TRUE;
    m_yScrollingEnabled = TRUE;
    m_xScrollPosition = 0;
    m_yScrollPosition = 0;
    m_xScrollLines = 0;
    m_yScrollLines = 0;
    m_xScrollLinesPerPage = 0;
    m_yScrollLinesPerPage = 0;
    m_scaleX = 1.0;
    m_scaleY = 1.0;
}

bool wxScrolledWindow::Create(wxWindow *parent, wxWindowID id,
           const wxPoint& pos,
           const wxSize& size,
           long style,
           const wxString& name)
{
    m_xScrollPixelsPerLine = 0;
    m_yScrollPixelsPerLine = 0;
    m_xScrollingEnabled = TRUE;
    m_yScrollingEnabled = TRUE;
    m_xScrollPosition = 0;
    m_yScrollPosition = 0;
    m_xScrollLines = 0;
    m_yScrollLines = 0;
    m_xScrollLinesPerPage = 0;
    m_yScrollLinesPerPage = 0;
    m_scaleX = 1.0;
    m_scaleY = 1.0;

    m_targetWindow = this;

    return wxPanel::Create(parent, id, pos, size, style, name);
}

/*
 * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
 * noUnitsX/noUnitsY:        : no. units per scrollbar
 */
void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
	       int noUnitsX, int noUnitsY,
	       int xPos, int yPos, bool noRefresh )
{
    bool do_refresh =
    (
      (noUnitsX != 0 && m_xScrollLines == 0) ||
      (noUnitsX < m_xScrollLines) ||
      (noUnitsY != 0 && m_yScrollLines == 0) ||
      (noUnitsY < m_yScrollLines) ||
      (xPos != m_xScrollPosition) ||
      (yPos != m_yScrollPosition) ||
      (pixelsPerUnitX != m_xScrollPixelsPerLine) ||
      (pixelsPerUnitY != m_yScrollPixelsPerLine)
    );

    m_xScrollPixelsPerLine = pixelsPerUnitX;
    m_yScrollPixelsPerLine = pixelsPerUnitY;
    m_xScrollPosition = xPos;
    m_yScrollPosition = yPos;
    m_xScrollLines = noUnitsX;
    m_yScrollLines = noUnitsY;

#ifdef __WXMOTIF__
    // Sorry, some Motif-specific code to implement a backing pixmap
    // for the wxRETAINED style. Implementing a backing store can't
    // be entirely generic because it relies on the wxWindowDC implementation
    // to duplicate X drawing calls for the backing pixmap.

    if ((m_windowStyle & wxRETAINED) == wxRETAINED)
    {
        Display* dpy = XtDisplay((Widget) GetMainWidget());

        int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine;
        int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine;
        if (m_backingPixmap &&
           !((m_pixmapWidth == totalPixelWidth) &&
             (m_pixmapHeight == totalPixelHeight)))
        {
            XFreePixmap (dpy, (Pixmap) m_backingPixmap);
            m_backingPixmap = (WXPixmap) 0;
        }

        if (!m_backingPixmap &&
           (noUnitsX != 0) && (noUnitsY != 0))
        {
            int depth = wxDisplayDepth();
            m_pixmapWidth = totalPixelWidth;
            m_pixmapHeight = totalPixelHeight;
            m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)),
            m_pixmapWidth, m_pixmapHeight, depth);
	}

    }
#endif

    AdjustScrollbars();

    if (do_refresh && !noRefresh)
	m_targetWindow->Refresh();

#ifdef __WXMSW__
   // Necessary?
    UpdateWindow ((HWND) m_targetWindow->GetHWND());
#endif
#ifdef __WXMAC__
		m_targetWindow->MacUpdateImmediately() ;
#endif
}

wxScrolledWindow::~wxScrolledWindow()
{
}

void wxScrolledWindow::SetTargetWindow( wxWindow *target )
{
    wxASSERT_MSG( target, wxT("target window must not be NULL") );
    m_targetWindow = target;
}

wxWindow *wxScrolledWindow::GetTargetWindow()
{
    return m_targetWindow;
}

void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
{
    int orient = event.GetOrientation();

    int nScrollInc = CalcScrollInc(event);
    if (nScrollInc == 0) return;

    if (orient == wxHORIZONTAL)
    {
        int newPos = m_xScrollPosition + nScrollInc;
        SetScrollPos(wxHORIZONTAL, newPos, TRUE );
    }
    else
    {
        int newPos = m_yScrollPosition + nScrollInc;
        SetScrollPos(wxVERTICAL, newPos, TRUE );
    }

    if (orient == wxHORIZONTAL)
    {
        m_xScrollPosition += nScrollInc;
    }
    else
    {
        m_yScrollPosition += nScrollInc;
    }

    if (orient == wxHORIZONTAL)
    {
       if (m_xScrollingEnabled)
            m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
       else
            m_targetWindow->Refresh();
    }
    else
    {
        if (m_yScrollingEnabled)
            m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
        else
            m_targetWindow->Refresh();
  }
#ifdef __WXMAC__
	m_targetWindow->MacUpdateImmediately() ;
#endif
}

int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
{
    int pos = event.GetPosition();
    int orient = event.GetOrientation();

    int nScrollInc = 0;
    switch (event.GetEventType())
    {
        case wxEVT_SCROLLWIN_TOP:
        {
            if (orient == wxHORIZONTAL)
                nScrollInc = - m_xScrollPosition;
            else
                nScrollInc = - m_yScrollPosition;
            break;
        }
        case wxEVT_SCROLLWIN_BOTTOM:
        {
            if (orient == wxHORIZONTAL)
                nScrollInc = m_xScrollLines - m_xScrollPosition;
            else
                nScrollInc = m_yScrollLines - m_yScrollPosition;
            break;
        }
        case wxEVT_SCROLLWIN_LINEUP:
        {
            nScrollInc = -1;
            break;
        }
        case wxEVT_SCROLLWIN_LINEDOWN:
        {
            nScrollInc = 1;
            break;
        }
        case wxEVT_SCROLLWIN_PAGEUP:
        {
            if (orient == wxHORIZONTAL)
                nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
            else
                nScrollInc = -GetScrollPageSize(wxVERTICAL);
            break;
        }
        case wxEVT_SCROLLWIN_PAGEDOWN:
        {
            if (orient == wxHORIZONTAL)
                nScrollInc = GetScrollPageSize(wxHORIZONTAL);
            else
                nScrollInc = GetScrollPageSize(wxVERTICAL);
            break;
        }
        case wxEVT_SCROLLWIN_THUMBTRACK:
        {
            if (orient == wxHORIZONTAL)
                nScrollInc = pos - m_xScrollPosition;
            else
                nScrollInc = pos - m_yScrollPosition;
            break;
        }
        default:
        {
            break;
        }
    }

    if (orient == wxHORIZONTAL)
    {
        if (m_xScrollPixelsPerLine > 0)
        {
            int w, h;
            m_targetWindow->GetClientSize(&w, &h);

            int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
            int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 );
            if (noPositions < 0)
	        noPositions = 0;

            if ( (m_xScrollPosition + nScrollInc) < 0 )
	        nScrollInc = -m_xScrollPosition; // As -ve as we can go
            else if ( (m_xScrollPosition + nScrollInc) > noPositions )
	        nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
        }
        else
            m_targetWindow->Refresh();
    }
    else
    {
        if (m_yScrollPixelsPerLine > 0)
	{
            int w, h;
            m_targetWindow->GetClientSize(&w, &h);

            int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
            int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 );
            if (noPositions < 0)
	        noPositions = 0;

            if ( (m_yScrollPosition + nScrollInc) < 0 )
	        nScrollInc = -m_yScrollPosition; // As -ve as we can go
            else if ( (m_yScrollPosition + nScrollInc) > noPositions )
	        nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go
        }
        else
            m_targetWindow->Refresh();
    }

    return nScrollInc;
}

// Adjust the scrollbars - new version.
void wxScrolledWindow::AdjustScrollbars()
{
    int w, h;
    m_targetWindow->GetClientSize(&w, &h);

    int oldXScroll = m_xScrollPosition;
    int oldYScroll = m_yScrollPosition;

    if (m_xScrollLines > 0)
    {
	// Calculate page size i.e. number of scroll units you get on the
	// current client window
        int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
        if (noPagePositions < 1) noPagePositions = 1;

        // Correct position if greater than extent of canvas minus
	// the visible portion of it or if below zero
	m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition);
        m_xScrollPosition = wxMax( 0, m_xScrollPosition );

        SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
        // The amount by which we scroll when paging
        SetScrollPageSize(wxHORIZONTAL, noPagePositions);
    }
    else
    {
        m_xScrollPosition = 0;
        SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
    }

    if (m_yScrollLines > 0)
    {
	// Calculate page size i.e. number of scroll units you get on the
	// current client window
        int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
        if (noPagePositions < 1) noPagePositions = 1;

        // Correct position if greater than extent of canvas minus
	// the visible portion of it or if below zero
        m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
        m_yScrollPosition = wxMax( 0, m_yScrollPosition );

        SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
        // The amount by which we scroll when paging
        SetScrollPageSize(wxVERTICAL, noPagePositions);
    }
    else
    {
        m_yScrollPosition = 0;
        SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
    }

    if (oldXScroll != m_xScrollPosition)
    {
       if (m_xScrollingEnabled)
            m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL );
       else
            m_targetWindow->Refresh();
    }

    if (oldYScroll != m_yScrollPosition)
    {
        if (m_yScrollingEnabled)
            m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL );
        else
            m_targetWindow->Refresh();
    }
}

// Default OnSize resets scrollbars, if any
void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
{
#if wxUSE_CONSTRAINTS
    if (GetAutoLayout()) Layout();
#endif

    AdjustScrollbars();
}

// This calls OnDraw, having adjusted the origin according to the current
// scroll position
void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
{
    wxPaintDC dc(this);
    PrepareDC(dc);

    OnDraw(dc);
}

// Override this function if you don't want to have wxScrolledWindow
// automatically change the origin according to the scroll position.
void wxScrolledWindow::PrepareDC(wxDC& dc)
{
    dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
                        -m_yScrollPosition * m_yScrollPixelsPerLine );
    dc.SetUserScale( m_scaleX, m_scaleY );
}

#if WXWIN_COMPATIBILITY
void wxScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const
{
      *x_page = GetScrollPageSize(wxHORIZONTAL);
      *y_page = GetScrollPageSize(wxVERTICAL);
}

void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
{
    if ( xx )
        *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
    if ( yy )
        *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
}
#endif // WXWIN_COMPATIBILITY

void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
{
    if ( x_unit )
        *x_unit = m_xScrollPixelsPerLine;
    if ( y_unit )
        *y_unit = m_yScrollPixelsPerLine;
}

int wxScrolledWindow::GetScrollPageSize(int orient) const
{
    if ( orient == wxHORIZONTAL )
        return m_xScrollLinesPerPage;
    else
        return m_yScrollLinesPerPage;
}

void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
{
    if ( orient == wxHORIZONTAL )
        m_xScrollLinesPerPage = pageSize;
    else
        m_yScrollLinesPerPage = pageSize;
}

/*
 * Scroll to given position (scroll position, not pixel position)
 */
void wxScrolledWindow::Scroll( int x_pos, int y_pos )
{
    if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
        ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;

    int w, h;
    m_targetWindow->GetClientSize(&w, &h);

    if (x_pos != -1)
    {
        int old_x = m_xScrollPosition;
        m_xScrollPosition = x_pos;

	// Calculate page size i.e. number of scroll units you get on the
	// current client window
        int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
        if (noPagePositions < 1) noPagePositions = 1;

        // Correct position if greater than extent of canvas minus
	// the visible portion of it or if below zero
        m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
        m_xScrollPosition = wxMax( 0, m_xScrollPosition );

        m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE );

	m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
    }
    if (y_pos != -1)
    {
        int old_y = m_yScrollPosition;
        m_yScrollPosition = y_pos;

	// Calculate page size i.e. number of scroll units you get on the
	// current client window
        int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
        if (noPagePositions < 1) noPagePositions = 1;

        // Correct position if greater than extent of canvas minus
	// the visible portion of it or if below zero
        m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
        m_yScrollPosition = wxMax( 0, m_yScrollPosition );

        m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE );

	m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
    }


#ifdef __WXMSW__
//    ::UpdateWindow ((HWND) GetHWND());
#else
//    Refresh();
#endif
#ifdef __WXMAC__
		m_targetWindow->MacUpdateImmediately() ;
#endif
}

void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
{
    m_xScrollingEnabled = x_scroll;
    m_yScrollingEnabled = y_scroll;
}

void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
{
    if ( x )
        *x = m_xScrollPixelsPerLine * m_xScrollLines;
    if ( y )
        *y = m_yScrollPixelsPerLine * m_yScrollLines;
}

// Where the current view starts from
void wxScrolledWindow::ViewStart (int *x, int *y) const
{
    if ( x )
        *x = m_xScrollPosition;
    if ( y )
        *y = m_yScrollPosition;
}

void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
{
    if ( xx )
        *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
    if ( yy )
        *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
}

void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
{
    if ( xx )
        *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
    if ( yy )
        *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: scrolwin.cpp
	3	// Purpose: wxScrolledWindow implementation
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 01/02/97
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation
	14	#pragma implementation "scrolwin.h"
	15	#endif
	16
	17	// For compilers that support precompilation, includes "wx.h".
	18	#include "wx/wxprec.h"
	19
	20	#include "wx/utils.h"
	21	#include "wx/dcclient.h"
	22
	23	#ifdef __BORLANDC__
	24	#pragma hdrstop
	25	#endif
	26
	27	#include "wx/generic/scrolwin.h"
	28	#include "wx/panel.h"
	29
	30	#if !USE_SHARED_LIBRARY
	31	BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
	32	EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
	33	EVT_SIZE(wxScrolledWindow::OnSize)
	34	EVT_PAINT(wxScrolledWindow::OnPaint)
	35	END_EVENT_TABLE()
	36
	37	IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
	38	#endif
	39
	40	#ifdef __WXMSW__
	41	#include "windows.h"
	42	#endif
	43
	44	#ifdef __WXMOTIF__
	45	// For wxRETAINED implementation
	46	#include <Xm/Xm.h>
	47	#endif
	48
	49	wxScrolledWindow::wxScrolledWindow()
	50	{
	51	m_xScrollPixelsPerLine = 0;
	52	m_yScrollPixelsPerLine = 0;
	53	m_xScrollingEnabled = TRUE;
	54	m_yScrollingEnabled = TRUE;
	55	m_xScrollPosition = 0;
	56	m_yScrollPosition = 0;
	57	m_xScrollLines = 0;
	58	m_yScrollLines = 0;
	59	m_xScrollLinesPerPage = 0;
	60	m_yScrollLinesPerPage = 0;
	61	m_scaleX = 1.0;
	62	m_scaleY = 1.0;
	63	}
	64
	65	bool wxScrolledWindow::Create(wxWindow *parent, wxWindowID id,
	66	const wxPoint& pos,
	67	const wxSize& size,
	68	long style,
	69	const wxString& name)
	70	{
	71	m_xScrollPixelsPerLine = 0;
	72	m_yScrollPixelsPerLine = 0;
	73	m_xScrollingEnabled = TRUE;
	74	m_yScrollingEnabled = TRUE;
	75	m_xScrollPosition = 0;
	76	m_yScrollPosition = 0;
	77	m_xScrollLines = 0;
	78	m_yScrollLines = 0;
	79	m_xScrollLinesPerPage = 0;
	80	m_yScrollLinesPerPage = 0;
	81	m_scaleX = 1.0;
	82	m_scaleY = 1.0;
	83
	84	m_targetWindow = this;
	85
	86	return wxPanel::Create(parent, id, pos, size, style, name);
	87	}
	88
	89	/*
	90	* pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
	91	* noUnitsX/noUnitsY: : no. units per scrollbar
	92	*/
	93	void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
	94	int noUnitsX, int noUnitsY,
	95	int xPos, int yPos, bool noRefresh )
	96	{
	97	bool do_refresh =
	98	(
	99	(noUnitsX != 0 && m_xScrollLines == 0) \|\|
	100	(noUnitsX < m_xScrollLines) \|\|
	101	(noUnitsY != 0 && m_yScrollLines == 0) \|\|
	102	(noUnitsY < m_yScrollLines) \|\|
	103	(xPos != m_xScrollPosition) \|\|
	104	(yPos != m_yScrollPosition) \|\|
	105	(pixelsPerUnitX != m_xScrollPixelsPerLine) \|\|
	106	(pixelsPerUnitY != m_yScrollPixelsPerLine)
	107	);
	108
	109	m_xScrollPixelsPerLine = pixelsPerUnitX;
	110	m_yScrollPixelsPerLine = pixelsPerUnitY;
	111	m_xScrollPosition = xPos;
	112	m_yScrollPosition = yPos;
	113	m_xScrollLines = noUnitsX;
	114	m_yScrollLines = noUnitsY;
	115
	116	#ifdef __WXMOTIF__
	117	// Sorry, some Motif-specific code to implement a backing pixmap
	118	// for the wxRETAINED style. Implementing a backing store can't
	119	// be entirely generic because it relies on the wxWindowDC implementation
	120	// to duplicate X drawing calls for the backing pixmap.
	121
	122	if ((m_windowStyle & wxRETAINED) == wxRETAINED)
	123	{
	124	Display* dpy = XtDisplay((Widget) GetMainWidget());
	125
	126	int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine;
	127	int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine;
	128	if (m_backingPixmap &&
	129	!((m_pixmapWidth == totalPixelWidth) &&
	130	(m_pixmapHeight == totalPixelHeight)))
	131	{
	132	XFreePixmap (dpy, (Pixmap) m_backingPixmap);
	133	m_backingPixmap = (WXPixmap) 0;
	134	}
	135
	136	if (!m_backingPixmap &&
	137	(noUnitsX != 0) && (noUnitsY != 0))
	138	{
	139	int depth = wxDisplayDepth();
	140	m_pixmapWidth = totalPixelWidth;
	141	m_pixmapHeight = totalPixelHeight;
	142	m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)),
	143	m_pixmapWidth, m_pixmapHeight, depth);
	144	}
	145
	146	}
	147	#endif
	148
	149	AdjustScrollbars();
	150
	151	if (do_refresh && !noRefresh)
	152	m_targetWindow->Refresh();
	153
	154	#ifdef __WXMSW__
	155	// Necessary?
	156	UpdateWindow ((HWND) m_targetWindow->GetHWND());
	157	#endif
	158	#ifdef __WXMAC__
	159	m_targetWindow->MacUpdateImmediately() ;
	160	#endif
	161	}
	162
	163	wxScrolledWindow::~wxScrolledWindow()
	164	{
	165	}
	166
	167	void wxScrolledWindow::SetTargetWindow( wxWindow *target )
	168	{
	169	wxASSERT_MSG( target, wxT("target window must not be NULL") );
	170	m_targetWindow = target;
	171	}
	172
	173	wxWindow *wxScrolledWindow::GetTargetWindow()
	174	{
	175	return m_targetWindow;
	176	}
	177
	178	void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
	179	{
	180	int orient = event.GetOrientation();
	181
	182	int nScrollInc = CalcScrollInc(event);
	183	if (nScrollInc == 0) return;
	184
	185	if (orient == wxHORIZONTAL)
	186	{
	187	int newPos = m_xScrollPosition + nScrollInc;
	188	SetScrollPos(wxHORIZONTAL, newPos, TRUE );
	189	}
	190	else
	191	{
	192	int newPos = m_yScrollPosition + nScrollInc;
	193	SetScrollPos(wxVERTICAL, newPos, TRUE );
	194	}
	195
	196	if (orient == wxHORIZONTAL)
	197	{
	198	m_xScrollPosition += nScrollInc;
	199	}
	200	else
	201	{
	202	m_yScrollPosition += nScrollInc;
	203	}
	204
	205	if (orient == wxHORIZONTAL)
	206	{
	207	if (m_xScrollingEnabled)
	208	m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
	209	else
	210	m_targetWindow->Refresh();
	211	}
	212	else
	213	{
	214	if (m_yScrollingEnabled)
	215	m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
	216	else
	217	m_targetWindow->Refresh();
	218	}
	219	#ifdef __WXMAC__
	220	m_targetWindow->MacUpdateImmediately() ;
	221	#endif
	222	}
	223
	224	int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
	225	{
	226	int pos = event.GetPosition();
	227	int orient = event.GetOrientation();
	228
	229	int nScrollInc = 0;
	230	switch (event.GetEventType())
	231	{
	232	case wxEVT_SCROLLWIN_TOP:
	233	{
	234	if (orient == wxHORIZONTAL)
	235	nScrollInc = - m_xScrollPosition;
	236	else
	237	nScrollInc = - m_yScrollPosition;
	238	break;
	239	}
	240	case wxEVT_SCROLLWIN_BOTTOM:
	241	{
	242	if (orient == wxHORIZONTAL)
	243	nScrollInc = m_xScrollLines - m_xScrollPosition;
	244	else
	245	nScrollInc = m_yScrollLines - m_yScrollPosition;
	246	break;
	247	}
	248	case wxEVT_SCROLLWIN_LINEUP:
	249	{
	250	nScrollInc = -1;
	251	break;
	252	}
	253	case wxEVT_SCROLLWIN_LINEDOWN:
	254	{
	255	nScrollInc = 1;
	256	break;
	257	}
	258	case wxEVT_SCROLLWIN_PAGEUP:
	259	{
	260	if (orient == wxHORIZONTAL)
	261	nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
	262	else
	263	nScrollInc = -GetScrollPageSize(wxVERTICAL);
	264	break;
	265	}
	266	case wxEVT_SCROLLWIN_PAGEDOWN:
	267	{
	268	if (orient == wxHORIZONTAL)
	269	nScrollInc = GetScrollPageSize(wxHORIZONTAL);
	270	else
	271	nScrollInc = GetScrollPageSize(wxVERTICAL);
	272	break;
	273	}
	274	case wxEVT_SCROLLWIN_THUMBTRACK:
	275	{
	276	if (orient == wxHORIZONTAL)
	277	nScrollInc = pos - m_xScrollPosition;
	278	else
	279	nScrollInc = pos - m_yScrollPosition;
	280	break;
	281	}
	282	default:
	283	{
	284	break;
	285	}
	286	}
	287
	288	if (orient == wxHORIZONTAL)
	289	{
	290	if (m_xScrollPixelsPerLine > 0)
	291	{
	292	int w, h;
	293	m_targetWindow->GetClientSize(&w, &h);
	294
	295	int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
	296	int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 );
	297	if (noPositions < 0)
	298	noPositions = 0;
	299
	300	if ( (m_xScrollPosition + nScrollInc) < 0 )
	301	nScrollInc = -m_xScrollPosition; // As -ve as we can go
	302	else if ( (m_xScrollPosition + nScrollInc) > noPositions )
	303	nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
	304	}
	305	else
	306	m_targetWindow->Refresh();
	307	}
	308	else
	309	{
	310	if (m_yScrollPixelsPerLine > 0)
	311	{
	312	int w, h;
	313	m_targetWindow->GetClientSize(&w, &h);
	314
	315	int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
	316	int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 );
	317	if (noPositions < 0)
	318	noPositions = 0;
	319
	320	if ( (m_yScrollPosition + nScrollInc) < 0 )
	321	nScrollInc = -m_yScrollPosition; // As -ve as we can go
	322	else if ( (m_yScrollPosition + nScrollInc) > noPositions )
	323	nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go
	324	}
	325	else
	326	m_targetWindow->Refresh();
	327	}
	328
	329	return nScrollInc;
	330	}
	331
	332	// Adjust the scrollbars - new version.
	333	void wxScrolledWindow::AdjustScrollbars()
	334	{
	335	int w, h;
	336	m_targetWindow->GetClientSize(&w, &h);
	337
	338	int oldXScroll = m_xScrollPosition;
	339	int oldYScroll = m_yScrollPosition;
	340
	341	if (m_xScrollLines > 0)
	342	{
	343	// Calculate page size i.e. number of scroll units you get on the
	344	// current client window
	345	int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
	346	if (noPagePositions < 1) noPagePositions = 1;
	347
	348	// Correct position if greater than extent of canvas minus
	349	// the visible portion of it or if below zero
	350	m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition);
	351	m_xScrollPosition = wxMax( 0, m_xScrollPosition );
	352
	353	SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
	354	// The amount by which we scroll when paging
	355	SetScrollPageSize(wxHORIZONTAL, noPagePositions);
	356	}
	357	else
	358	{
	359	m_xScrollPosition = 0;
	360	SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
	361	}
	362
	363	if (m_yScrollLines > 0)
	364	{
	365	// Calculate page size i.e. number of scroll units you get on the
	366	// current client window
	367	int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
	368	if (noPagePositions < 1) noPagePositions = 1;
	369
	370	// Correct position if greater than extent of canvas minus
	371	// the visible portion of it or if below zero
	372	m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
	373	m_yScrollPosition = wxMax( 0, m_yScrollPosition );
	374
	375	SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
	376	// The amount by which we scroll when paging
	377	SetScrollPageSize(wxVERTICAL, noPagePositions);
	378	}
	379	else
	380	{
	381	m_yScrollPosition = 0;
	382	SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
	383	}
	384
	385	if (oldXScroll != m_xScrollPosition)
	386	{
	387	if (m_xScrollingEnabled)
	388	m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL );
	389	else
	390	m_targetWindow->Refresh();
	391	}
	392
	393	if (oldYScroll != m_yScrollPosition)
	394	{
	395	if (m_yScrollingEnabled)
	396	m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL );
	397	else
	398	m_targetWindow->Refresh();
	399	}
	400	}
	401
	402	// Default OnSize resets scrollbars, if any
	403	void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	404	{
	405	#if wxUSE_CONSTRAINTS
	406	if (GetAutoLayout()) Layout();
	407	#endif
	408
	409	AdjustScrollbars();
	410	}
	411
	412	// This calls OnDraw, having adjusted the origin according to the current
	413	// scroll position
	414	void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	415	{
	416	wxPaintDC dc(this);
	417	PrepareDC(dc);
	418
	419	OnDraw(dc);
	420	}
	421
	422	// Override this function if you don't want to have wxScrolledWindow
	423	// automatically change the origin according to the scroll position.
	424	void wxScrolledWindow::PrepareDC(wxDC& dc)
	425	{
	426	dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
	427	-m_yScrollPosition * m_yScrollPixelsPerLine );
	428	dc.SetUserScale( m_scaleX, m_scaleY );
	429	}
	430
	431	#if WXWIN_COMPATIBILITY
	432	void wxScrolledWindow::GetScrollUnitsPerPage (int x_page, int y_page) const
	433	{
	434	*x_page = GetScrollPageSize(wxHORIZONTAL);
	435	*y_page = GetScrollPageSize(wxVERTICAL);
	436	}
	437
	438	void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float xx, float yy) const
	439	{
	440	if ( xx )
	441	xx = (float)(x + m_xScrollPosition m_xScrollPixelsPerLine);
	442	if ( yy )
	443	yy = (float)(y + m_yScrollPosition m_yScrollPixelsPerLine);
	444	}
	445	#endif // WXWIN_COMPATIBILITY
	446
	447	void wxScrolledWindow::GetScrollPixelsPerUnit (int x_unit, int y_unit) const
	448	{
	449	if ( x_unit )
	450	*x_unit = m_xScrollPixelsPerLine;
	451	if ( y_unit )
	452	*y_unit = m_yScrollPixelsPerLine;
	453	}
	454
	455	int wxScrolledWindow::GetScrollPageSize(int orient) const
	456	{
	457	if ( orient == wxHORIZONTAL )
	458	return m_xScrollLinesPerPage;
	459	else
	460	return m_yScrollLinesPerPage;
	461	}
	462
	463	void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
	464	{
	465	if ( orient == wxHORIZONTAL )
	466	m_xScrollLinesPerPage = pageSize;
	467	else
	468	m_yScrollLinesPerPage = pageSize;
	469	}
	470
	471	/*
	472	* Scroll to given position (scroll position, not pixel position)
	473	*/
	474	void wxScrolledWindow::Scroll( int x_pos, int y_pos )
	475	{
	476	if (((x_pos == -1) \|\| (x_pos == m_xScrollPosition)) &&
	477	((y_pos == -1) \|\| (y_pos == m_yScrollPosition))) return;
	478
	479	int w, h;
	480	m_targetWindow->GetClientSize(&w, &h);
	481
	482	if (x_pos != -1)
	483	{
	484	int old_x = m_xScrollPosition;
	485	m_xScrollPosition = x_pos;
	486
	487	// Calculate page size i.e. number of scroll units you get on the
	488	// current client window
	489	int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
	490	if (noPagePositions < 1) noPagePositions = 1;
	491
	492	// Correct position if greater than extent of canvas minus
	493	// the visible portion of it or if below zero
	494	m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
	495	m_xScrollPosition = wxMax( 0, m_xScrollPosition );
	496
	497	m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE );
	498
	499	m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
	500	}
	501	if (y_pos != -1)
	502	{
	503	int old_y = m_yScrollPosition;
	504	m_yScrollPosition = y_pos;
	505
	506	// Calculate page size i.e. number of scroll units you get on the
	507	// current client window
	508	int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 );
	509	if (noPagePositions < 1) noPagePositions = 1;
	510
	511	// Correct position if greater than extent of canvas minus
	512	// the visible portion of it or if below zero
	513	m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
	514	m_yScrollPosition = wxMax( 0, m_yScrollPosition );
	515
	516	m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE );
	517
	518	m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
	519	}
	520
	521
	522	#ifdef __WXMSW__
	523	// ::UpdateWindow ((HWND) GetHWND());
	524	#else
	525	// Refresh();
	526	#endif
	527	#ifdef __WXMAC__
	528	m_targetWindow->MacUpdateImmediately() ;
	529	#endif
	530	}
	531
	532	void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
	533	{
	534	m_xScrollingEnabled = x_scroll;
	535	m_yScrollingEnabled = y_scroll;
	536	}
	537
	538	void wxScrolledWindow::GetVirtualSize (int x, int y) const
	539	{
	540	if ( x )
	541	x = m_xScrollPixelsPerLine m_xScrollLines;
	542	if ( y )
	543	y = m_yScrollPixelsPerLine m_yScrollLines;
	544	}
	545
	546	// Where the current view starts from
	547	void wxScrolledWindow::ViewStart (int x, int y) const
	548	{
	549	if ( x )
	550	*x = m_xScrollPosition;
	551	if ( y )
	552	*y = m_yScrollPosition;
	553	}
	554
	555	void wxScrolledWindow::CalcScrolledPosition(int x, int y, int xx, int yy) const
	556	{
	557	if ( xx )
	558	xx = x - m_xScrollPosition m_xScrollPixelsPerLine;
	559	if ( yy )
	560	yy = y - m_yScrollPosition m_yScrollPixelsPerLine;
	561	}
	562
	563	void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int xx, int yy) const
	564	{
	565	if ( xx )
	566	xx = x + m_xScrollPosition m_xScrollPixelsPerLine;
	567	if ( yy )
	568	yy = y + m_yScrollPosition m_yScrollPixelsPerLine;
	569	}