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/settings.h"
  18 #include "wx/utils.h"
  19
  20 #include <Xm/Xm.h>
  21
  22 #include "wx/motif/private.h"
  23
  24 //-----------------------------------------------------------------------------
  25 // wxMemoryDC
  26 //-----------------------------------------------------------------------------
  27
  28 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxWindowDC)
  29
  30 wxMemoryDC::wxMemoryDC(void)
  31 {
  32     m_ok = TRUE;
  33     m_display = wxGetDisplay();
  34
  35     Display* display = (Display*) m_display;
  36
  37     XGCValues gcvalues;
  38     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  39     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  40     gcvalues.graphics_exposures = False;
  41     gcvalues.line_width = 1;
  42     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  43         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
  44         &gcvalues);
  45
  46     m_backgroundPixel = (int) gcvalues.background;
  47
  48     // Get the current Font so we can set it back later
  49     XGCValues valReturn;
  50     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  51     m_oldFont = (WXFont) valReturn.font;
  52     SetBrush (* wxWHITE_BRUSH);
  53     SetPen (* wxBLACK_PEN);
  54     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
  55 };
  56
  57 wxMemoryDC::wxMemoryDC( wxDC* dc )
  58 {
  59     m_ok = TRUE;
  60     if (dc && dc->IsKindOf(CLASSINFO(wxWindowDC)))
  61         m_display = ((wxWindowDC*)dc)->GetDisplay();
  62     else
  63         m_display = wxGetDisplay();
  64
  65     Display* display = (Display*) m_display;
  66
  67     XGCValues gcvalues;
  68     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  69     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  70     gcvalues.graphics_exposures = False;
  71     gcvalues.line_width = 1;
  72     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  73         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
  74         &gcvalues);
  75
  76     m_backgroundPixel = (int) gcvalues.background;
  77
  78     // Get the current Font so we can set it back later
  79     XGCValues valReturn;
  80     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  81     m_oldFont = (WXFont) valReturn.font;
  82     SetBrush (* wxWHITE_BRUSH);
  83     SetPen (* wxBLACK_PEN);
  84 };
  85
  86 wxMemoryDC::~wxMemoryDC(void)
  87 {
  88 };
  89
  90 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  91 {
  92     m_bitmap = bitmap;
  93
  94     if (m_gc)
  95         XFreeGC((Display*) m_display, (GC) m_gc);
  96     m_gc = (WXGC) NULL;
  97
  98     if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
  99     {
 100         m_pixmap = m_bitmap.GetPixmap();
 101         Display* display = (Display*) m_display;
 102
 103         XGCValues gcvalues;
 104         gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 105         gcvalues.background = WhitePixel (display, DefaultScreen (display));
 106         gcvalues.graphics_exposures = False;
 107         gcvalues.line_width = 1;
 108         m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
 109             GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth,
 110             &gcvalues);
 111
 112         m_backgroundPixel = (int) gcvalues.background;
 113
 114         // Get the current Font so we can set it back later
 115         XGCValues valReturn;
 116         XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
 117         m_oldFont = (WXFont) valReturn.font;
 118
 119         bool oldOpt = GetOptimization();
 120         SetOptimization(FALSE);
 121
 122         SetBrush (* wxWHITE_BRUSH);
 123         SetPen (* wxBLACK_PEN);
 124
 125         SetOptimization(oldOpt);
 126
 127         m_ok = TRUE;
 128     }
 129     else
 130     {
 131         m_ok = FALSE;
 132         m_pixmap = (WXPixmap) 0;
 133     };
 134 };
 135
 136 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 137 {
 138     if (m_bitmap.Ok())
 139     {
 140         if (width) (*width) = m_bitmap.GetWidth();
 141         if (height) (*height) = m_bitmap.GetHeight();
 142     }
 143     else
 144     {
 145         if (width) (*width) = 0;
 146         if (height) (*height) = 0;
 147     };
 148 };
 149
 150