don't compare invalid iterators/node pointers

[wxWidgets.git] / src / gtk1 / dc.cpp

diff --git a/src/gtk1/dc.cpp b/src/gtk1/dc.cpp
index d98edaf9ec094c5c1affe59f1669b3dce8b42c6e..80d08c5b01de62f90b486fd830bbef949f7deb6d 100644 (file)
--- a/src/gtk1/dc.cpp
+++ b/src/gtk1/dc.cpp
@@ -3,30 +3,17 @@
 // Purpose:
 // Author:      Robert Roebling
 // RCS-ID:      $Id$
-// Copyright:   (c) 1998 Robert Roebling, Markus Holzem
+// Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-
-#ifdef __GNUG__
-    #pragma implementation "dc.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #include "wx/dc.h"
 
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
-
-//-----------------------------------------------------------------------------
-// constants
-//-----------------------------------------------------------------------------
-
-#define mm2inches        0.0393700787402
-#define inches2mm        25.4
-#define mm2twips         56.6929133859
-#define twips2mm         0.0176388888889
-#define mm2pt            2.83464566929
-#define pt2mm            0.352777777778
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
 
 //-----------------------------------------------------------------------------
 // wxDC
@@ -38,8 +25,10 @@ wxDC::wxDC()
 {
     m_ok = FALSE;
 
-    m_mm_to_pix_x = 1.0;
-    m_mm_to_pix_y = 1.0;
+    m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
+                    (double)wxGetDisplaySizeMM().GetWidth();
+    m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
+                    (double)wxGetDisplaySizeMM().GetHeight();
 
     m_needComputeScaleX = FALSE; /* not used yet */
     m_needComputeScaleY = FALSE; /* not used yet */
@@ -51,7 +40,7 @@ wxDC::wxDC()
     m_brush = *wxWHITE_BRUSH;
 }
 
-void wxDC::DoSetClippingRegion( long x, long y, long width, long height )
+void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 {
     m_clipping = TRUE;
     m_clipX1 = x;
@@ -60,28 +49,17 @@ void wxDC::DoSetClippingRegion( long x, long y, long width, long height )
     m_clipY2 = y + height;
 }
 
-void wxDC::DestroyClippingRegion()
-{
-    m_clipping = FALSE;
-}
-
 // ---------------------------------------------------------------------------
 // get DC capabilities
 // ---------------------------------------------------------------------------
 
-void wxDC::DoGetSize( int* width, int* height ) const
-{
-    if (width) *width = m_maxX-m_minX;
-    if (height) *height = m_maxY-m_minY;
-}
-
 void wxDC::DoGetSizeMM( int* width, int* height ) const
 {
     int w = 0;
     int h = 0;
     GetSize( &w, &h );
-    if (width) *width = int( double(w) / (m_scaleX*m_mm_to_pix_x) );
-    if (height) *height = int( double(h) / (m_scaleY*m_mm_to_pix_y) );
+    if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) );
+    if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) );
 }
 
 // Resolution in pixels per logical inch
@@ -123,7 +101,7 @@ void wxDC::SetMapMode( int mode )
           break;
     }
     m_mappingMode = mode;
-    
+
 /*  we don't do this mega optimisation
     if (mode != wxMM_TEXT)
     {
@@ -149,14 +127,14 @@ void wxDC::SetLogicalScale( double x, double y )
     ComputeScaleAndOrigin();
 }
 
-void wxDC::SetLogicalOrigin( long x, long y )
+void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 {
     m_logicalOriginX = x * m_signX;   // is this still correct ?
     m_logicalOriginY = y * m_signY;
     ComputeScaleAndOrigin();
 }
 
-void wxDC::SetDeviceOrigin( long x, long y )
+void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 {
     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
     m_deviceOriginX = x;
@@ -176,42 +154,42 @@ void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 // coordinates transformations
 // ---------------------------------------------------------------------------
 
-long wxDCBase::DeviceToLogicalX(long x) const
+wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 {
     return ((wxDC *)this)->XDEV2LOG(x);
 }
 
-long wxDCBase::DeviceToLogicalY(long y) const
+wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 {
     return ((wxDC *)this)->YDEV2LOG(y);
 }
 
-long wxDCBase::DeviceToLogicalXRel(long x) const
+wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 {
     return ((wxDC *)this)->XDEV2LOGREL(x);
 }
 
-long wxDCBase::DeviceToLogicalYRel(long y) const
+wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 {
     return ((wxDC *)this)->YDEV2LOGREL(y);
 }
 
-long wxDCBase::LogicalToDeviceX(long x) const
+wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 {
     return ((wxDC *)this)->XLOG2DEV(x);
 }
 
-long wxDCBase::LogicalToDeviceY(long y) const
+wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 {
     return ((wxDC *)this)->YLOG2DEV(y);
 }
 
-long wxDCBase::LogicalToDeviceXRel(long x) const
+wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 {
     return ((wxDC *)this)->XLOG2DEVREL(x);
 }
 
-long wxDCBase::LogicalToDeviceYRel(long y) const
+wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 {
     return ((wxDC *)this)->YLOG2DEVREL(y);
 }