X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/19193a2c85987b595932957e73013e7ea100f0e8..91b4bd63177025704dd39679a2a7c4198eeb7909:/src/os2/dc.cpp

diff --git a/src/os2/dc.cpp b/src/os2/dc.cpp
index d2fe58841f..8c8d8a66a4 100644
--- a/src/os2/dc.cpp
+++ b/src/os2/dc.cpp
@@ -542,6 +542,18 @@ int wxDC::GetDepth() const
 
 void wxDC::Clear()
 {
+    //
+    // If this is a canvas DC then just fill with the background color
+    // Otherwise purge the whole thing
+    //
+    if (m_pCanvas)
+    {
+        RECTL                       vRect;
+
+        ::GpiQueryClipBox(m_hPS, &vRect);
+        ::WinFillRect(m_hPS, &vRect, ::GpiQueryBackColor(m_hPS));
+    }
+    else
     ::GpiErase(m_hPS);
 } // end of wxDC::Clear
 
@@ -1796,8 +1808,8 @@ void wxDC::SetMapMode(
         ulOptions = PU_ARBITRARY | GPIF_DEFAULT;
         ::GpiSetPS(m_hPS, &vSize, ulOptions);
     }
-    m_nWindowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
-    m_nWindowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
+    m_nWindowExtX = (int)MS_XDEV2LOG(VIEWPORT_EXTENT);
+    m_nWindowExtY = (int)MS_YDEV2LOG(VIEWPORT_EXTENT);
     // ????
 }; // end of wxDC::SetMapMode
 
@@ -1885,7 +1897,8 @@ wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 
 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 {
-    return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
+	// axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_scaleX));
 }
 
 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
@@ -1895,7 +1908,8 @@ wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 
 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 {
-    return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
+	// axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_scaleY));
 }
 
 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
@@ -1905,7 +1919,8 @@ wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 
 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 {
-    return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
+	// axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_scaleX);
 }
 
 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
@@ -1915,7 +1930,8 @@ wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 
 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 {
-    return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
+	// axis orientation is not taken into account for conversion of a distance
+    return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_scaleY);
 }
 
 // ---------------------------------------------------------------------------