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