src/motif/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcmemory.cpp
   3 // Purpose:     wxMemoryDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dcmemory.h"
  14 #endif
  15
  16 #include "wx/dcmemory.h"
  17 #include "wx/utils.h"
  18
  19 #include <Xm/Xm.h>
  20
  21 #include "wx/motif/private.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // wxMemoryDC
  25 //-----------------------------------------------------------------------------
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxWindowDC)
  28
  29 wxMemoryDC::wxMemoryDC(void)
  30 {
  31     m_ok = TRUE;
  32     m_display = wxGetDisplay();
  33
  34     Display* display = (Display*) m_display;
  35
  36     XGCValues gcvalues;
  37     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  38     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  39     gcvalues.graphics_exposures = False;
  40     gcvalues.line_width = 1;
  41     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  42         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
  43           &gcvalues);
  44
  45     m_backgroundPixel = (int) gcvalues.background;
  46
  47     // Get the current Font so we can set it back later
  48     XGCValues valReturn;
  49     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  50     m_oldFont = (WXFont) valReturn.font;
  51     SetBrush (wxWHITE_BRUSH);
  52     SetPen (wxBLACK_PEN);
  53 };
  54
  55 wxMemoryDC::wxMemoryDC( wxDC* dc )
  56 {
  57     m_ok = TRUE;
  58     if (dc && dc->IsKindOf(CLASSINFO(wxWindowDC)))
  59         m_display = ((wxWindowDC*)dc)->GetDisplay();
  60     else
  61         m_display = wxGetDisplay();
  62
  63     Display* display = (Display*) m_display;
  64
  65     XGCValues gcvalues;
  66     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  67     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  68     gcvalues.graphics_exposures = False;
  69     gcvalues.line_width = 1;
  70     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  71         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
  72           &gcvalues);
  73
  74     m_backgroundPixel = (int) gcvalues.background;
  75
  76     // Get the current Font so we can set it back later
  77     XGCValues valReturn;
  78     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  79     m_oldFont = (WXFont) valReturn.font;
  80     SetBrush (wxWHITE_BRUSH);
  81     SetPen (wxBLACK_PEN);
  82 };
  83
  84 wxMemoryDC::~wxMemoryDC(void)
  85 {
  86 };
  87
  88 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  89 {
  90   m_bitmap = bitmap;
  91
  92   if (m_gc)
  93     XFreeGC((Display*) m_display, (GC) m_gc);
  94   m_gc = (WXGC) NULL;
  95
  96   if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
  97   {
  98     m_pixmap = m_bitmap.GetPixmap();
  99     Display* display = (Display*) m_display;
 100
 101     XGCValues gcvalues;
 102     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 103     gcvalues.background = WhitePixel (display, DefaultScreen (display));
 104     gcvalues.graphics_exposures = False;
 105     gcvalues.line_width = 1;
 106     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
 107         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
 108           &gcvalues);
 109
 110     m_backgroundPixel = (int) gcvalues.background;
 111
 112     // Get the current Font so we can set it back later
 113     XGCValues valReturn;
 114     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
 115     m_oldFont = (WXFont) valReturn.font;
 116
 117     bool oldOpt = GetOptimization();
 118     SetOptimization(FALSE);
 119
 120     SetBrush (wxWHITE_BRUSH);
 121     SetPen (wxBLACK_PEN);
 122
 123     SetOptimization(oldOpt);
 124
 125     m_ok = TRUE;
 126   }
 127   else
 128   {
 129     m_ok = FALSE;
 130     m_pixmap = (WXPixmap) 0;
 131   };
 132 };
 133
 134 void wxMemoryDC::GetSize( int *width, int *height ) const
 135 {
 136   if (m_bitmap.Ok())
 137   {
 138     if (width) (*width) = m_bitmap.GetWidth();
 139     if (height) (*height) = m_bitmap.GetHeight();
 140   }
 141   else
 142   {
 143     if (width) (*width) = 0;
 144     if (height) (*height) = 0;
 145   };
 146 };
 147
 148