/////////////////////////////////////////////////////////////////////////////
-// Name: scrolwin.cpp
+// Name: generic/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
+// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation
-#pragma implementation "scrolwin.h"
+ #pragma implementation "scrolwin.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
#include "wx/utils.h"
#include "wx/dcclient.h"
+#include "wx/generic/scrolwin.h"
+#include "wx/panel.h"
+
#ifdef __WXMSW__
-#include "windows.h"
+ #include "windows.h"
#endif
-#ifdef __BORLANDC__
-#pragma hdrstop
+#ifdef __WXMOTIF__
+// For wxRETAINED implementation
+#ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++
+ //This code switches off the compiler warnings
+# pragma message disable nosimpint
+#endif
+#include <Xm/Xm.h>
+#ifdef __VMS__
+# pragma message enable nosimpint
+#endif
#endif
-#include "wx/generic/scrolwin.h"
+// ----------------------------------------------------------------------------
+// event tables
+// ----------------------------------------------------------------------------
-#if !USE_SHARED_LIBRARY
-BEGIN_EVENT_TABLE(wxScrolledWindow, wxWindow)
- EVT_SCROLL(wxScrolledWindow::OnScroll)
- EVT_SIZE(wxScrolledWindow::OnSize)
- EVT_PAINT(wxScrolledWindow::OnPaint)
+BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
+ EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
+ EVT_SIZE(wxScrolledWindow::OnSize)
+ EVT_PAINT(wxScrolledWindow::OnPaint)
+ EVT_CHAR(wxScrolledWindow::OnChar)
END_EVENT_TABLE()
-IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxWindow)
-#endif
+IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
+
+// ============================================================================
+// implementation
+// ============================================================================
-wxScrolledWindow::wxScrolledWindow(void)
+// ----------------------------------------------------------------------------
+// wxScrolledWindow creation
+// ----------------------------------------------------------------------------
+
+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;
+ 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)
+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;
+
+ // we need wxWANTS_CHARS to process arrows ourselves
+ return wxPanel::Create(parent, id, pos, size, style | wxWANTS_CHARS, name);
+}
+
+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;
-
- return wxWindow::Create(parent, id, pos, size, style, name);
}
+// ----------------------------------------------------------------------------
+// setting scrolling parameters
+// ----------------------------------------------------------------------------
+
/*
* 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 )
+ int noUnitsX, int noUnitsY,
+ int xPos, int yPos, bool noRefresh )
{
- bool do_refresh =
- (
+ int xpos, ypos;
+
+ CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos);
+ bool do_refresh =
+ (
(noUnitsX != 0 && m_xScrollLines == 0) ||
- (noUnitsX < m_xScrollPosition) ||
+ (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX*noUnitsX) ||
+
(noUnitsY != 0 && m_yScrollLines == 0) ||
- (noUnitsY < m_yScrollPosition) ||
+ (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY*noUnitsY) ||
(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;
-
- AdjustScrollbars();
-
- if (do_refresh && !noRefresh) Refresh();
-
+ (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 // Motif
+
+ AdjustScrollbars();
+
+ if (do_refresh && !noRefresh)
+ m_targetWindow->Refresh();
+
#ifdef __WXMSW__
- UpdateWindow ((HWND) GetHWND());
+ // GRG: if this turns out to be really necessary, we could
+ // at least move it to the above if { ... } so that it is
+ // only done if noRefresh = FALSE (the default). OTOH, if
+ // this doesn't break anything, which seems to be the
+ // case, we could just leave it out.
+
+ // Necessary?
+ // UpdateWindow ((HWND) m_targetWindow->GetHWND());
+#endif
+#ifdef __WXMAC__
+ m_targetWindow->MacUpdateImmediately() ;
#endif
}
-void wxScrolledWindow::OnScroll(wxScrollEvent& event)
-{
- int orient = event.GetOrientation();
-
- int nScrollInc = CalcScrollInc(event);
- if (nScrollInc == 0)
- return;
-
- // TODO: should we store the scroll position here as well as in wxWindow?
- if (orient == wxHORIZONTAL)
- {
- int newPos = m_xScrollPosition + nScrollInc;
- SetScrollPos(wxHORIZONTAL, newPos, TRUE );
- }
- else
- {
- int newPos = m_yScrollPosition + nScrollInc;
- SetScrollPos(wxVERTICAL, newPos, TRUE );
- }
+// ----------------------------------------------------------------------------
+// target window handling
+// ----------------------------------------------------------------------------
-/*
- // TODO We need to multiply the ScrollWindow amount by the scaling
- // factor, but how do we know what this is in wxWin 2.0???
- float scaleX = 1.0;
- float scaleY = 1.0;
-
- if ( this->IsKindOf(CLASSINFO(wxCanvas)) )
- {
- wxDC* dc = ((wxCanvas *)this)->GetDC();
- dc->GetUserScale(&scaleX, &scaleY);
- }
-*/
-
- if (orient == wxHORIZONTAL)
- {
- m_xScrollPosition += nScrollInc;
- }
- else
- {
- m_yScrollPosition += nScrollInc;
- }
-
- if (orient == wxHORIZONTAL)
- {
- if (m_xScrollingEnabled)
- ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
- else
- Refresh();
- }
- else
- {
- if (m_yScrollingEnabled)
- ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
- else
- Refresh();
- }
+void wxScrolledWindow::SetTargetWindow( wxWindow *target )
+{
+ wxASSERT_MSG( target, wxT("target window must not be NULL") );
+ m_targetWindow = target;
+}
+wxWindow *wxScrolledWindow::GetTargetWindow()
+{
+ return m_targetWindow;
}
-int wxScrolledWindow::CalcScrollInc(wxScrollEvent& event)
+// ----------------------------------------------------------------------------
+// scrolling implementation itself
+// ----------------------------------------------------------------------------
+
+void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
{
- int pos = event.GetPosition();
- int orient = event.GetOrientation();
+ int orient = event.GetOrientation();
- int nScrollInc = 0;
- switch (event.GetEventType())
- {
- case wxEVT_SCROLL_TOP:
+ int nScrollInc = CalcScrollInc(event);
+ if (nScrollInc == 0) return;
+
+ if (orient == wxHORIZONTAL)
{
- if (orient == wxHORIZONTAL)
- nScrollInc = - m_xScrollPosition;
- else
- nScrollInc = - m_yScrollPosition;
- break;
+ int newPos = m_xScrollPosition + nScrollInc;
+ SetScrollPos(wxHORIZONTAL, newPos, TRUE );
}
- case wxEVT_SCROLL_BOTTOM:
+ else
{
- if (orient == wxHORIZONTAL)
- nScrollInc = m_xScrollLines - m_xScrollPosition;
- else
- nScrollInc = m_yScrollLines - m_yScrollPosition;
- break;
+ int newPos = m_yScrollPosition + nScrollInc;
+ SetScrollPos(wxVERTICAL, newPos, TRUE );
}
- case wxEVT_SCROLL_LINEUP:
+
+ if (orient == wxHORIZONTAL)
{
- nScrollInc = -1;
- break;
+ m_xScrollPosition += nScrollInc;
}
- case wxEVT_SCROLL_LINEDOWN:
+ else
{
- nScrollInc = 1;
- break;
+ m_yScrollPosition += nScrollInc;
}
- case wxEVT_SCROLL_PAGEUP:
+
+ if (orient == wxHORIZONTAL)
{
- if (orient == wxHORIZONTAL)
- nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
- else
- nScrollInc = -GetScrollPageSize(wxVERTICAL);
- break;
+ if (m_xScrollingEnabled)
+ m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
+ else
+ m_targetWindow->Refresh();
}
- case wxEVT_SCROLL_PAGEDOWN:
+ else
{
- if (orient == wxHORIZONTAL)
- nScrollInc = GetScrollPageSize(wxHORIZONTAL);
- else
- nScrollInc = GetScrollPageSize(wxVERTICAL);
- break;
+ if (m_yScrollingEnabled)
+ m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
+ else
+ m_targetWindow->Refresh();
}
- case wxEVT_SCROLL_THUMBTRACK:
+#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())
{
- if (orient == wxHORIZONTAL)
- nScrollInc = pos - m_xScrollPosition;
- else
- nScrollInc = pos - m_yScrollPosition;
- break;
+ 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:
+ case wxEVT_SCROLLWIN_THUMBRELEASE:
+ {
+ if (orient == wxHORIZONTAL)
+ nScrollInc = pos - m_xScrollPosition;
+ else
+ nScrollInc = pos - m_yScrollPosition;
+ break;
+ }
+ default:
+ {
+ break;
+ }
}
- default:
+
+ if (orient == wxHORIZONTAL)
{
- break;
- }
- }
- if (orient == wxHORIZONTAL)
- {
- if (m_xScrollPixelsPerLine > 0) {
- int w, h;
- GetClientSize(&w, &h);
-
- int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
- int noPositions = (int) ( ((nMaxWidth - w)/(float)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
+ 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
- Refresh();
- }
- else
- {
- if (m_yScrollPixelsPerLine > 0) {
- int w, h;
- GetClientSize(&w, &h);
-
- int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
- int noPositions = (int) ( ((nMaxHeight - h)/(float)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
+ {
+ 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();
}
- else
- Refresh();
- }
- return nScrollInc;
+ return nScrollInc;
}
// Adjust the scrollbars - new version.
-void wxScrolledWindow::AdjustScrollbars(void)
+void wxScrolledWindow::AdjustScrollbars()
{
- int w, h;
- GetClientSize(&w, &h);
-
- // Recalculate scroll bar range and position
- if (m_xScrollLines > 0)
- {
- int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
- int newRange = (int) ( ((nMaxWidth)/(float)m_xScrollPixelsPerLine) + 0.5 );
- if (newRange < 0)
- newRange = 0;
-
- m_xScrollPosition = wxMin(newRange, m_xScrollPosition);
-
- // Calculate page size i.e. number of scroll units you get on the
- // current client window
- int noPagePositions = (int) ( (w/(float)m_xScrollPixelsPerLine) + 0.5 );
- if (noPagePositions < 1)
- noPagePositions = 1;
-
- SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, newRange);
- SetScrollPageSize(wxHORIZONTAL, noPagePositions);
- }
- // Robert Roebling
- else
- {
- m_xScrollPosition = 0;
- SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
- }
-
- if (m_yScrollLines > 0)
- {
- int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine;
- int newRange = (int) ( ((nMaxHeight)/(float)m_yScrollPixelsPerLine) + 0.5 );
- if (newRange < 0)
- newRange = 0;
-
- m_yScrollPosition = wxMin(newRange, m_yScrollPosition);
-
- // Calculate page size i.e. number of scroll units you get on the
- // current client window
- int noPagePositions = (int) ( (h/(float)m_yScrollPixelsPerLine) + 0.5 );
- if (noPagePositions < 1)
- noPagePositions = 1;
-
- SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, newRange);
- SetScrollPageSize(wxVERTICAL, noPagePositions);
- }
- else
- {
- m_yScrollPosition = 0;
- SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); // Robert Roebling
- }
-
-}
+ int w, h;
+ m_targetWindow->GetClientSize(&w, &h);
-// Default OnSize resets scrollbars, if any
-void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
-{
-#if wxUSE_CONSTRAINTS
- if (GetAutoLayout())
- Layout();
-#endif
+ int oldXScroll = m_xScrollPosition;
+ int oldYScroll = m_yScrollPosition;
- AdjustScrollbars();
-}
+ 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);
+ }
-// This calls OnDraw, having adjusted the origin according to the current
-// scroll position
-void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
-{
- wxPaintDC dc(this);
- PrepareDC(dc);
+ 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();
+ }
- OnDraw(dc);
+ if (oldYScroll != m_yScrollPosition)
+ {
+ if (m_yScrollingEnabled)
+ m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL );
+ else
+ m_targetWindow->Refresh();
+ }
}
// 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);
+ dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
+ -m_yScrollPosition * m_yScrollPixelsPerLine );
+ dc.SetUserScale( m_scaleX, m_scaleY );
}
#if WXWIN_COMPATIBILITY
*x_page = GetScrollPageSize(wxHORIZONTAL);
*y_page = GetScrollPageSize(wxVERTICAL);
}
-#endif
+
+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
{
- *x_unit = m_xScrollPixelsPerLine;
- *y_unit = m_yScrollPixelsPerLine;
+ if ( x_unit )
+ *x_unit = m_xScrollPixelsPerLine;
+ if ( y_unit )
+ *y_unit = m_yScrollPixelsPerLine;
}
int wxScrolledWindow::GetScrollPageSize(int orient) const
/*
* Scroll to given position (scroll position, not pixel position)
*/
-void wxScrolledWindow::Scroll (int x_pos, int y_pos)
+void wxScrolledWindow::Scroll( int x_pos, int y_pos )
{
- int old_x, old_y;
- ViewStart (&old_x, &old_y);
- if (((x_pos == -1) || (x_pos == old_x)) && ((y_pos == -1) || (y_pos == old_y)))
- return;
+ if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
+ ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
- if (x_pos > -1)
+ int w, h;
+ m_targetWindow->GetClientSize(&w, &h);
+
+ if (x_pos != -1)
{
- m_xScrollPosition = x_pos;
- SetScrollPos (wxHORIZONTAL, x_pos, TRUE);
+ 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 );
+
+ if (old_x == m_xScrollPosition) return;
+
+ m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE );
+ m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
}
- if (y_pos > -1)
+ if (y_pos != -1)
{
- m_yScrollPosition = y_pos;
- SetScrollPos (wxVERTICAL, y_pos, TRUE);
+ 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 );
+
+ if (old_y == m_yScrollPosition) return;
+
+ m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE );
+ m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
}
- Refresh();
-#ifdef __WXMSW__
- ::UpdateWindow ((HWND) GetHWND());
+
+#ifdef __WXMAC__
+ m_targetWindow->MacUpdateImmediately();
#endif
}
void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
{
- m_xScrollingEnabled = x_scroll;
- m_yScrollingEnabled = y_scroll;
+ m_xScrollingEnabled = x_scroll;
+ m_yScrollingEnabled = y_scroll;
}
void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
{
- *x = m_xScrollPixelsPerLine * m_xScrollLines;
- *y = m_yScrollPixelsPerLine * m_yScrollLines;
+ 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
+void wxScrolledWindow::GetViewStart (int *x, int *y) const
{
- *x = m_xScrollPosition;
- *y = m_yScrollPosition;
+ if ( x )
+ *x = m_xScrollPosition;
+ if ( y )
+ *y = m_yScrollPosition;
}
void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
{
- *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
- *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
+ if ( xx )
+ *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
+ if ( yy )
+ *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
}
-void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const
+void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
{
- *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine);
- *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine);
+ if ( xx )
+ *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
+ if ( yy )
+ *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
}
+// ----------------------------------------------------------------------------
+// event handlers
+// ----------------------------------------------------------------------------
+// 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);
+}
+
+// kbd handling: notice that we use OnChar() and not OnKeyDown() for
+// compatibility here - if we used OnKeyDown(), the programs which process
+// arrows themselves in their OnChar() would never get the message and like
+// this they always have the priority
+void wxScrolledWindow::OnChar(wxKeyEvent& event)
+{
+ int stx, sty, // view origin
+ szx, szy, // view size (total)
+ clix, cliy; // view size (on screen)
+
+ ViewStart(&stx, &sty);
+ GetClientSize(&clix, &cliy);
+ GetVirtualSize(&szx, &szy);
+
+ if( m_xScrollPixelsPerLine )
+ {
+ clix /= m_xScrollPixelsPerLine;
+ szx /= m_xScrollPixelsPerLine;
+ }
+ else
+ {
+ clix = 0;
+ szx = -1;
+ }
+ if( m_yScrollPixelsPerLine )
+ {
+ cliy /= m_yScrollPixelsPerLine;
+ szy /= m_yScrollPixelsPerLine;
+ }
+ else
+ {
+ cliy = 0;
+ szy = -1;
+ }
+
+ switch ( event.KeyCode() )
+ {
+ case WXK_PAGEUP:
+ case WXK_PRIOR:
+ Scroll(-1, sty - (5 * cliy / 6));
+ break;
+
+ case WXK_PAGEDOWN:
+ case WXK_NEXT:
+ Scroll(-1, sty + (5 * cliy / 6));
+ break;
+
+ case WXK_HOME:
+ Scroll(0, event.ControlDown() ? 0 : -1);
+ break;
+
+ case WXK_END:
+ Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
+ break;
+
+ case WXK_UP:
+ Scroll(-1, sty - 1);
+ break;
+
+ case WXK_DOWN:
+ Scroll(-1, sty + 1);
+ break;
+
+ case WXK_LEFT:
+ Scroll(stx - 1, -1);
+ break;
+
+ case WXK_RIGHT:
+ Scroll(stx + 1, -1);
+ break;
+
+ default:
+ // not for us
+ event.Skip();
+ }
+}
projects / wxWidgets.git / blobdiff