X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/139adb6a281e8c1a94519e24a1e7be319b50155e..57493f9f852d91a5750b4a68053a465f421e12be:/src/generic/scrolwin.cpp

diff --git a/src/generic/scrolwin.cpp b/src/generic/scrolwin.cpp
index 4b99809f81..139f45ed39 100644
--- a/src/generic/scrolwin.cpp
+++ b/src/generic/scrolwin.cpp
@@ -20,10 +20,6 @@
 #include "wx/utils.h"
 #include "wx/dcclient.h"
 
-#ifdef __WXMSW__
-#include "windows.h"
-#endif
-
 #ifdef __BORLANDC__
 #pragma hdrstop
 #endif
@@ -40,6 +36,15 @@ END_EVENT_TABLE()
 IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxWindow)
 #endif
 
+#ifdef __WXMSW__
+#include "windows.h"
+#endif
+
+#ifdef __WXMOTIF__
+// For wxRETAINED implementation
+#include <Xm/Xm.h>
+#endif
+
 wxScrolledWindow::wxScrolledWindow(void)
 {
     m_xScrollPixelsPerLine = 0;
@@ -104,12 +109,46 @@ void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
     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) Refresh();
    
 #ifdef __WXMSW__
+   // Necessary?
     UpdateWindow ((HWND) GetHWND());
 #endif
 }
@@ -121,7 +160,6 @@ void wxScrolledWindow::OnScroll(wxScrollEvent& event)
     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;
@@ -133,19 +171,6 @@ void wxScrolledWindow::OnScroll(wxScrollEvent& event)
         SetScrollPos(wxVERTICAL, newPos, TRUE );
     }
 
-/*
-  // 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;
@@ -234,6 +259,7 @@ int wxScrolledWindow::CalcScrollInc(wxScrollEvent& event)
       break;
     }
   }
+
   if (orient == wxHORIZONTAL)
   {
     if (m_xScrollPixelsPerLine > 0) {
@@ -295,7 +321,8 @@ void wxScrolledWindow::AdjustScrollbars(void)
         m_xScrollPosition = wxMax( 0, m_xScrollPosition );
 
         SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
-//      SetScrollPageSize(wxHORIZONTAL, noPagePositions);
+        // The amount by which we scroll when paging
+        SetScrollPageSize(wxHORIZONTAL, noPagePositions);
     }
     else
     { 
@@ -316,7 +343,8 @@ void wxScrolledWindow::AdjustScrollbars(void)
         m_yScrollPosition = wxMax( 0, m_yScrollPosition );
 
         SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
-//      SetScrollPageSize(wxVERTICAL, noPagePositions);
+        // The amount by which we scroll when paging
+        SetScrollPageSize(wxVERTICAL, noPagePositions);
     }
     else
     {
@@ -431,6 +459,7 @@ void wxScrolledWindow::Scroll( int x_pos, int y_pos )
     Refresh();
     
 #ifdef __WXMSW__
+    // Necessary?
     ::UpdateWindow ((HWND) GetHWND());
 #endif
 }