src/motif/dcmemory.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/dcmemory.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/utils.h"
  19 #endif
  20
  21 #include "wx/settings.h"
  22
  23 #ifdef __VMS__
  24 #pragma message disable nosimpint
  25 #endif
  26 #include <Xm/Xm.h>
  27 #ifdef __VMS__
  28 #pragma message enable nosimpint
  29 #endif
  30
  31 #include "wx/motif/private.h"
  32
  33 //-----------------------------------------------------------------------------
  34 // wxMemoryDC
  35 //-----------------------------------------------------------------------------
  36
  37 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxWindowDC)
  38
  39 wxMemoryDC::wxMemoryDC(void)
  40 {
  41     m_ok = true;
  42     m_display = wxGetDisplay();
  43
  44     Display* display = (Display*) m_display;
  45
  46     XGCValues gcvalues;
  47     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  48     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  49     gcvalues.graphics_exposures = False;
  50     gcvalues.subwindow_mode = IncludeInferiors;
  51     gcvalues.line_width = 1;
  52     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  53         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  54         &gcvalues);
  55
  56     m_backgroundPixel = (int) gcvalues.background;
  57
  58     SetBrush (* wxWHITE_BRUSH);
  59     SetPen (* wxBLACK_PEN);
  60     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
  61 }
  62
  63 wxMemoryDC::wxMemoryDC( wxDC* dc )
  64 {
  65     m_ok = true;
  66     if (dc && dc->IsKindOf(CLASSINFO(wxWindowDC)))
  67         m_display = ((wxWindowDC*)dc)->GetDisplay();
  68     else
  69         m_display = wxGetDisplay();
  70
  71     Display* display = (Display*) m_display;
  72
  73     XGCValues gcvalues;
  74     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  75     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  76     gcvalues.graphics_exposures = False;
  77     gcvalues.subwindow_mode = IncludeInferiors;
  78     gcvalues.line_width = 1;
  79     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  80         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  81         &gcvalues);
  82
  83     m_backgroundPixel = (int) gcvalues.background;
  84
  85     SetBrush (* wxWHITE_BRUSH);
  86     SetPen (* wxBLACK_PEN);
  87 }
  88
  89 wxMemoryDC::~wxMemoryDC(void)
  90 {
  91 }
  92
  93 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  94 {
  95     m_bitmap = bitmap;
  96
  97     if (m_gc)
  98         XFreeGC((Display*) m_display, (GC) m_gc);
  99     m_gc = (WXGC) NULL;
 100
 101     if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
 102     {
 103         m_pixmap = m_bitmap.GetDrawable();
 104         Display* display = (Display*) m_display;
 105
 106         XGCValues gcvalues;
 107         gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 108         gcvalues.background = WhitePixel (display, DefaultScreen (display));
 109         gcvalues.graphics_exposures = False;
 110         gcvalues.subwindow_mode = IncludeInferiors;
 111         gcvalues.line_width = 1;
 112         m_gc = (WXGC) XCreateGC (display, (Drawable)m_pixmap/* RootWindow (display, DefaultScreen (display)) */,
 113             GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
 114             &gcvalues);
 115
 116         m_backgroundPixel = (int) gcvalues.background;
 117         m_ok = true;
 118
 119         SetBrush (* wxWHITE_BRUSH);
 120         SetPen (* wxBLACK_PEN);
 121     }
 122     else
 123     {
 124         m_ok = false;
 125         m_pixmap = (WXPixmap) 0;
 126     };
 127 }
 128
 129 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 130 {
 131     if (m_bitmap.Ok())
 132     {
 133         if (width) (*width) = m_bitmap.GetWidth();
 134         if (height) (*height) = m_bitmap.GetHeight();
 135     }
 136     else
 137     {
 138         if (width) (*width) = 0;
 139         if (height) (*height) = 0;
 140     };
 141 }
 142
 143