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