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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "dcmemory.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #include "wx/dcmemory.h"
  20 #include "wx/settings.h"
  21 #include "wx/utils.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     // Get the current Font so we can set it back later
  59     XGCValues valReturn;
  60     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  61     m_oldFont = (WXFont) valReturn.font;
  62     SetBrush (* wxWHITE_BRUSH);
  63     SetPen (* wxBLACK_PEN);
  64     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
  65 };
  66
  67 wxMemoryDC::wxMemoryDC( wxDC* dc )
  68 {
  69     m_ok = true;
  70     if (dc && dc->IsKindOf(CLASSINFO(wxWindowDC)))
  71         m_display = ((wxWindowDC*)dc)->GetDisplay();
  72     else
  73         m_display = wxGetDisplay();
  74
  75     Display* display = (Display*) m_display;
  76
  77     XGCValues gcvalues;
  78     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  79     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  80     gcvalues.graphics_exposures = False;
  81     gcvalues.subwindow_mode = IncludeInferiors;
  82     gcvalues.line_width = 1;
  83     m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  84         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  85         &gcvalues);
  86
  87     m_backgroundPixel = (int) gcvalues.background;
  88
  89     // Get the current Font so we can set it back later
  90     XGCValues valReturn;
  91     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  92     m_oldFont = (WXFont) valReturn.font;
  93     SetBrush (* wxWHITE_BRUSH);
  94     SetPen (* wxBLACK_PEN);
  95 };
  96
  97 wxMemoryDC::~wxMemoryDC(void)
  98 {
  99 };
 100
 101 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
 102 {
 103     m_bitmap = bitmap;
 104
 105     if (m_gc)
 106         XFreeGC((Display*) m_display, (GC) m_gc);
 107     m_gc = (WXGC) NULL;
 108
 109     if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
 110     {
 111         m_pixmap = m_bitmap.GetDrawable();
 112         Display* display = (Display*) m_display;
 113
 114         XGCValues gcvalues;
 115         gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 116         gcvalues.background = WhitePixel (display, DefaultScreen (display));
 117         gcvalues.graphics_exposures = False;
 118         gcvalues.subwindow_mode = IncludeInferiors;
 119         gcvalues.line_width = 1;
 120         m_gc = (WXGC) XCreateGC (display, (Drawable)m_pixmap/* RootWindow (display, DefaultScreen (display)) */,
 121             GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
 122             &gcvalues);
 123
 124         m_backgroundPixel = (int) gcvalues.background;
 125         m_ok = true;
 126
 127         // Get the current Font so we can set it back later
 128         XGCValues valReturn;
 129         XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
 130         m_oldFont = (WXFont) valReturn.font;
 131
 132         SetBrush (* wxWHITE_BRUSH);
 133         SetPen (* wxBLACK_PEN);
 134     }
 135     else
 136     {
 137         m_ok = FALSE;
 138         m_pixmap = (WXPixmap) 0;
 139     };
 140 };
 141
 142 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 143 {
 144     if (m_bitmap.Ok())
 145     {
 146         if (width) (*width) = m_bitmap.GetWidth();
 147         if (height) (*height) = m_bitmap.GetHeight();
 148     }
 149     else
 150     {
 151         if (width) (*width) = 0;
 152         if (height) (*height) = 0;
 153     };
 154 };
 155
 156