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 wxMemoryDC::wxMemoryDC( const wxBitmap& bitmap )
  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     if ( bitmap.IsOk() )
  62         SelectObject(bitmap);
  63 }
  64
  65 wxMemoryDC::wxMemoryDC( wxDC* dc )
  66 {
  67     m_ok = true;
  68     if (dc && dc->IsKindOf(CLASSINFO(wxWindowDC)))
  69         m_display = ((wxWindowDC*)dc)->GetDisplay();
  70     else
  71         m_display = wxGetDisplay();
  72
  73     Display* display = (Display*) m_display;
  74
  75     XGCValues gcvalues;
  76     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  77     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  78     gcvalues.graphics_exposures = False;
  79     gcvalues.subwindow_mode = IncludeInferiors;
  80     gcvalues.line_width = 1;
  81     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  82         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  83         &gcvalues);
  84
  85     m_backgroundPixel = gcvalues.background;
  86
  87     SetBrush (* wxWHITE_BRUSH);
  88     SetPen (* wxBLACK_PEN);
  89 }
  90
  91 wxMemoryDC::~wxMemoryDC(void)
  92 {
  93 }
  94
  95 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  96 {
  97     m_bitmap = bitmap;
  98
  99     if (m_gc)
 100         XFreeGC((Display*) m_display, (GC) m_gc);
 101     m_gc = (WXGC) NULL;
 102
 103     if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
 104     {
 105         m_pixmap = m_bitmap.GetDrawable();
 106         Display* display = (Display*) m_display;
 107
 108         XGCValues gcvalues;
 109         gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 110         gcvalues.background = WhitePixel (display, DefaultScreen (display));
 111         gcvalues.graphics_exposures = False;
 112         gcvalues.subwindow_mode = IncludeInferiors;
 113         gcvalues.line_width = 1;
 114         m_gc = (WXGC) XCreateGC (display, (Drawable)m_pixmap/* RootWindow (display, DefaultScreen (display)) */,
 115             GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
 116             &gcvalues);
 117
 118         m_backgroundPixel = gcvalues.background;
 119         m_ok = true;
 120
 121         SetBrush (* wxWHITE_BRUSH);
 122         SetPen (* wxBLACK_PEN);
 123     }
 124     else
 125     {
 126         m_ok = false;
 127         m_pixmap = (WXPixmap) 0;
 128     };
 129 }
 130
 131 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 132 {
 133     if (m_bitmap.Ok())
 134     {
 135         if (width) (*width) = m_bitmap.GetWidth();
 136         if (height) (*height) = m_bitmap.GetHeight();
 137     }
 138     else
 139     {
 140         if (width) (*width) = 0;
 141         if (height) (*height) = 0;
 142     };
 143 }