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::DoGetSize( 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