X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5bd24f724209014da8889d1b225294777f5f856a..8a16d7370e3cdc7d583a6f14ab11b3a1d27b73df:/src/generic/scrlwing.cpp

diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index d6ace0914c..be46007774 100644
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        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.
@@ -29,15 +29,18 @@
     #pragma hdrstop
 #endif
 
-#include "wx/utils.h"
-#include "wx/dcclient.h"
-
 #include "wx/scrolwin.h"
-#include "wx/panel.h"
-#if wxUSE_TIMER
-#include "wx/timer.h"
+
+#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/sizer.h"
+
 #include "wx/recguard.h"
 
 #ifdef __WXMSW__
@@ -308,6 +311,8 @@ wxScrollHelper::wxScrollHelper(wxWindow *win)
     m_handler = NULL;
 
     m_win = win;
+    
+    m_win->SetScrollHelper( this );
 
     // by default, the associated window is also the target window
     DoSetTargetWindow(win);
@@ -810,8 +815,17 @@ void wxScrollHelper::AdjustScrollbars()
 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 );
 }
 
@@ -841,6 +855,15 @@ void wxScrollHelper::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
         *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 )
@@ -878,7 +901,7 @@ void wxScrollHelper::Scroll( int x_pos, int y_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
@@ -886,7 +909,8 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition );
         m_xScrollPosition = wxMax( 0, m_xScrollPosition );
 
-        if (old_x != m_xScrollPosition) {
+        if (old_x != m_xScrollPosition)
+        {
             m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
             m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
                                           GetScrollRect() );
@@ -899,7 +923,7 @@ void wxScrollHelper::Scroll( int x_pos, int 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
@@ -907,7 +931,8 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos )
         m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
         m_yScrollPosition = wxMax( 0, m_yScrollPosition );
 
-        if (old_y != m_yScrollPosition) {
+        if (old_y != m_yScrollPosition)
+        {
             m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
             m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
                                           GetScrollRect() );
@@ -1339,4 +1364,3 @@ WXLRESULT wxScrolledWindow::MSWWindowProc(WXUINT nMsg,
 }
 
 #endif // __WXMSW__
-