src/motif/dcscreen.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcscreen.cpp
   3 // Purpose:     wxScreenDC class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "dcscreen.h"
  14 #endif
  15
  16 #include "wx/window.h"
  17 #include "wx/dcscreen.h"
  18 #include "wx/utils.h"
  19
  20 #ifdef __VMS__
  21 #pragma message disable nosimpint
  22 #endif
  23 #include <Xm/Xm.h>
  24 #ifdef __VMS__
  25 #pragma message enable nosimpint
  26 #endif
  27
  28 #include "wx/motif/private.h"
  29
  30 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
  31
  32 WXWindow wxScreenDC::sm_overlayWindow = 0;
  33 int wxScreenDC::sm_overlayWindowX = 0;
  34 int wxScreenDC::sm_overlayWindowY = 0;
  35
  36 // Create a DC representing the whole screen
  37 wxScreenDC::wxScreenDC()
  38 {
  39     m_display = wxGetDisplay();
  40     Display* display = (Display*) m_display;
  41
  42     if (sm_overlayWindow)
  43     {
  44         m_pixmap = sm_overlayWindow;
  45         m_deviceOriginX = - sm_overlayWindowX;
  46         m_deviceOriginY = - sm_overlayWindowY;
  47     }
  48     else
  49         m_pixmap = (WXPixmap) RootWindow(display, DefaultScreen(display));
  50
  51     XGCValues gcvalues;
  52     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  53     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  54     gcvalues.graphics_exposures = False;
  55     gcvalues.subwindow_mode = IncludeInferiors;
  56     gcvalues.line_width = 1;
  57     m_gc = XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  58         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  59         &gcvalues);
  60
  61     m_backgroundPixel = (int) gcvalues.background;
  62     m_ok = TRUE;
  63 }
  64
  65 wxScreenDC::~wxScreenDC()
  66 {
  67 }
  68
  69 bool wxScreenDC::StartDrawingOnTop(wxWindow* window)
  70 {
  71     wxRect rect;
  72     int x, y, width, height;
  73     window->GetPosition(& x, & y);
  74     if (window->GetParent())
  75         window->GetParent()->ClientToScreen(& x, & y);
  76     window->GetSize(& width, & height);
  77     rect.x = x; rect.y = y;
  78     rect.width = width; rect.height = height;
  79
  80     return StartDrawingOnTop(& rect);
  81 }
  82
  83 bool wxScreenDC::StartDrawingOnTop(wxRect* rect)
  84 {
  85     if (sm_overlayWindow)
  86         return FALSE;
  87
  88     Display *dpy = (Display*) wxGetDisplay();
  89     Pixmap screenPixmap = RootWindow(dpy, DefaultScreen(dpy));
  90
  91     int x = 0;
  92     int y = 0;
  93     int width, height;
  94     wxDisplaySize(&width, &height);
  95
  96     if (rect)
  97     {
  98         x = rect->x; y = rect->y;
  99         width = rect->width; height = rect->height;
 100     }
 101     sm_overlayWindowX = x;
 102     sm_overlayWindowY = y;
 103
 104     XSetWindowAttributes attributes;
 105     attributes.override_redirect = True;
 106     unsigned long valueMask = CWOverrideRedirect;
 107
 108     sm_overlayWindow = (WXWindow) XCreateWindow(dpy, screenPixmap, x, y, width, height, 0,
 109         wxDisplayDepth(), InputOutput,
 110         DefaultVisual(dpy, 0), valueMask,
 111         & attributes);
 112
 113     if (sm_overlayWindow)
 114     {
 115         XMapWindow(dpy, (Window) sm_overlayWindow);
 116         return TRUE;
 117     }
 118     else
 119         return FALSE;
 120 }
 121
 122 bool wxScreenDC::EndDrawingOnTop()
 123 {
 124     if (sm_overlayWindow)
 125     {
 126         XDestroyWindow((Display*) wxGetDisplay(), (Window) sm_overlayWindow);
 127         sm_overlayWindow = 0;
 128         return TRUE;
 129     }
 130     else
 131         return FALSE;
 132 }