src/x11/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 #ifdef __GNUG__
  13 #pragma implementation "dcmemory.h"
  14 #endif
  15
  16 #include "wx/dcmemory.h"
  17 #include "wx/settings.h"
  18 #include "wx/utils.h"
  19
  20 #ifdef __VMS__
  21 #pragma message disable nosimpint
  22 #endif
  23 #ifdef __VMS__
  24 #pragma message enable nosimpint
  25 #endif
  26
  27 #include "wx/x11/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     // Get the current Font so we can set it back later
  55     XGCValues valReturn;
  56     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  57     m_oldFont = (WXFont) valReturn.font;
  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     // Get the current Font so we can set it back later
  86     XGCValues valReturn;
  87     XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
  88     m_oldFont = (WXFont) valReturn.font;
  89     SetBrush (* wxWHITE_BRUSH);
  90     SetPen (* wxBLACK_PEN);
  91 };
  92
  93 wxMemoryDC::~wxMemoryDC(void)
  94 {
  95 };
  96
  97 void wxMemoryDC::SelectObject( const wxBitmap& bitmap )
  98 {
  99     m_bitmap = bitmap;
 100
 101     if (m_gc)
 102         XFreeGC((Display*) m_display, (GC) m_gc);
 103     m_gc = (WXGC) NULL;
 104
 105     if (m_bitmap.Ok() && (bitmap.GetDisplay() == m_display))
 106     {
 107         m_pixmap = m_bitmap.GetPixmap();
 108         Display* display = (Display*) m_display;
 109
 110         XGCValues gcvalues;
 111         gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
 112         gcvalues.background = WhitePixel (display, DefaultScreen (display));
 113         gcvalues.graphics_exposures = False;
 114         gcvalues.subwindow_mode = IncludeInferiors;
 115         gcvalues.line_width = 1;
 116         m_gc = (WXGC) XCreateGC (display, RootWindow (display, DefaultScreen (display)),
 117             GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
 118             &gcvalues);
 119
 120         m_backgroundPixel = (int) gcvalues.background;
 121
 122         // Get the current Font so we can set it back later
 123         XGCValues valReturn;
 124         XGetGCValues((Display*) m_display, (GC) m_gc, GCFont, &valReturn);
 125         m_oldFont = (WXFont) valReturn.font;
 126
 127         bool oldOpt = GetOptimization();
 128         SetOptimization(FALSE);
 129
 130         SetBrush (* wxWHITE_BRUSH);
 131         SetPen (* wxBLACK_PEN);
 132
 133         SetOptimization(oldOpt);
 134
 135         m_ok = TRUE;
 136     }
 137     else
 138     {
 139         m_ok = FALSE;
 140         m_pixmap = (WXPixmap) 0;
 141     };
 142 };
 143
 144 void wxMemoryDC::DoGetSize( int *width, int *height ) const
 145 {
 146     if (m_bitmap.Ok())
 147     {
 148         if (width) (*width) = m_bitmap.GetWidth();
 149         if (height) (*height) = m_bitmap.GetHeight();
 150     }
 151     else
 152     {
 153         if (width) (*width) = 0;
 154         if (height) (*height) = 0;
 155     };
 156 };
 157
 158