/////////////////////////////////////////////////////////////////////////////
-// Name: src/generic/scrolwin.cpp
+// Name: src/generic/scrlwing.cpp
// Purpose: wxScrolledWindow implementation
// Author: Julian Smart
// Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement.
#ifndef WX_PRECOMP
#include "wx/utils.h"
#include "wx/panel.h"
+ #include "wx/dcclient.h"
+ #if wxUSE_TIMER
+ #include "wx/timer.h"
+ #endif
+ #include "wx/sizer.h"
#endif
-#include "wx/dcclient.h"
-
-#if wxUSE_TIMER
-#include "wx/timer.h"
-#endif
-#include "wx/sizer.h"
#include "wx/recguard.h"
#ifdef __WXMSW__
m_handler = NULL;
m_win = win;
+
+ m_win->SetScrollHelper( this );
// by default, the associated window is also the target window
DoSetTargetWindow(win);
return;
}
- int orient = event.GetOrientation();
- if (orient == wxHORIZONTAL)
- {
- m_xScrollPosition += nScrollInc;
- m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
- }
- else
- {
- m_yScrollPosition += nScrollInc;
- m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
- }
-
bool needsRefresh = false;
int dx = 0,
dy = 0;
+ int orient = event.GetOrientation();
if (orient == wxHORIZONTAL)
{
if ( m_xScrollingEnabled )
}
}
+ if ( !needsRefresh )
+ {
+ // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+ // otherwise invalidated area could be updated incorrectly later when
+ // ScrollWindow() makes sure they're repainted before scrolling them
+ m_targetWindow->Update();
+ }
+
+ if (orient == wxHORIZONTAL)
+ {
+ m_xScrollPosition += nScrollInc;
+ m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
+ }
+ else
+ {
+ m_yScrollPosition += nScrollInc;
+ m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
+ }
+
if ( needsRefresh )
{
m_targetWindow->Refresh(true, GetScrollRect());
void wxScrollHelper::DoPrepareDC(wxDC& dc)
{
wxPoint pt = dc.GetDeviceOrigin();
- dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
- pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+#ifdef __WXGTK__
+ // It may actually be correct to always query
+ // the m_sign from the DC here, but I leve the
+ // #ifdef GTK for now.
+ if (m_win->GetLayoutDirection() == wxLayout_RightToLeft)
+ dc.SetDeviceOrigin( pt.x + m_xScrollPosition * m_xScrollPixelsPerLine,
+ pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
+ else
+#endif
+ dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine,
+ pt.y - m_yScrollPosition * m_yScrollPixelsPerLine );
dc.SetUserScale( m_scaleX, m_scaleY );
}
*y_unit = m_yScrollPixelsPerLine;
}
+
+int wxScrollHelper::GetScrollLines( int orient ) const
+{
+ if ( orient == wxHORIZONTAL )
+ return m_xScrollLines;
+ else
+ return m_yScrollLines;
+}
+
int wxScrollHelper::GetScrollPageSize(int orient) const
{
if ( orient == wxHORIZONTAL )
int w = 0, h = 0;
GetTargetSize(&w, &h);
+ // compute new position:
+ int new_x = m_xScrollPosition;
+ int new_y = m_yScrollPosition;
+
if ((x_pos != -1) && (m_xScrollPixelsPerLine))
{
- int old_x = m_xScrollPosition;
- m_xScrollPosition = x_pos;
+ new_x = 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 );
+ int noPagePositions = w/m_xScrollPixelsPerLine;
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) {
- m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
- m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
- GetScrollRect() );
- }
+ new_x = wxMin( m_xScrollLines-noPagePositions, new_x );
+ new_x = wxMax( 0, new_x );
}
if ((y_pos != -1) && (m_yScrollPixelsPerLine))
{
- int old_y = m_yScrollPosition;
- m_yScrollPosition = y_pos;
+ new_y = 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 );
+ int noPagePositions = h/m_yScrollPixelsPerLine;
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 );
+ new_y = wxMin( m_yScrollLines-noPagePositions, new_y );
+ new_y = wxMax( 0, new_y );
+ }
- if (old_y != m_yScrollPosition) {
- m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
- m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
- GetScrollRect() );
- }
+ if ( new_x == m_xScrollPosition && new_y == m_yScrollPosition )
+ return; // nothing to do, the position didn't change
+
+ // flush all pending repaints before we change m_{x,y}ScrollPosition, as
+ // otherwise invalidated area could be updated incorrectly later when
+ // ScrollWindow() makes sure they're repainted before scrolling them
+ m_targetWindow->Update();
+
+ // update the position and scroll the window now:
+ if (m_xScrollPosition != new_x)
+ {
+ int old_x = m_xScrollPosition;
+ m_xScrollPosition = new_x;
+ m_win->SetScrollPos( wxHORIZONTAL, new_x );
+ m_targetWindow->ScrollWindow( (old_x-new_x)*m_xScrollPixelsPerLine, 0,
+ GetScrollRect() );
+ }
+
+ if (m_yScrollPosition != new_y)
+ {
+ int old_y = m_yScrollPosition;
+ m_yScrollPosition = new_y;
+ m_win->SetScrollPos( wxVERTICAL, new_y );
+ m_targetWindow->ScrollWindow( 0, (old_y-new_y)*m_yScrollPixelsPerLine,
+ GetScrollRect() );
}
}
projects / wxWidgets.git / blobdiff