src/motif/dcscreen.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/dcscreen.cpp
   3 // Purpose:     wxScreenDCImpl 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 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/utils.h"
  17     #include "wx/window.h"
  18     #include "wx/frame.h"
  19     #include "wx/dcscreen.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 #include "wx/motif/dcscreen.h"
  32
  33 IMPLEMENT_ABSTRACT_CLASS(wxScreenDCImpl, wxWindowDCImpl)
  34
  35 WXWindow wxScreenDCImpl::sm_overlayWindow = 0;
  36 int wxScreenDCImpl::sm_overlayWindowX = 0;
  37 int wxScreenDCImpl::sm_overlayWindowY = 0;
  38
  39 // Create a DC representing the whole screen
  40 wxScreenDCImpl::wxScreenDCImpl(wxScreenDC *owner)
  41               : wxWindowDCImpl(owner)
  42 {
  43     m_display = wxGetDisplay();
  44     Display* display = (Display*) m_display;
  45
  46     if (sm_overlayWindow)
  47     {
  48         m_pixmap = sm_overlayWindow;
  49         m_deviceOriginX = - sm_overlayWindowX;
  50         m_deviceOriginY = - sm_overlayWindowY;
  51     }
  52     else
  53         m_pixmap = (WXPixmap) RootWindow(display, DefaultScreen(display));
  54
  55     XGCValues gcvalues;
  56     gcvalues.foreground = BlackPixel (display, DefaultScreen (display));
  57     gcvalues.background = WhitePixel (display, DefaultScreen (display));
  58     gcvalues.graphics_exposures = False;
  59     gcvalues.subwindow_mode = IncludeInferiors;
  60     gcvalues.line_width = 1;
  61     m_gc = XCreateGC (display, RootWindow (display, DefaultScreen (display)),
  62         GCForeground | GCBackground | GCGraphicsExposures | GCLineWidth | GCSubwindowMode,
  63         &gcvalues);
  64
  65     m_backgroundPixel = gcvalues.background;
  66     m_ok = true;
  67 }
  68
  69 wxScreenDCImpl::~wxScreenDCImpl()
  70 {
  71     EndDrawingOnTop();
  72 }
  73
  74 bool wxScreenDCImpl::StartDrawingOnTop(wxWindow* window)
  75 {
  76     wxRect rect;
  77     int x, y, width, height;
  78     window->GetPosition(& x, & y);
  79     if (window->GetParent() && !window->IsKindOf(CLASSINFO(wxFrame)))
  80         window->GetParent()->ClientToScreen(& x, & y);
  81     window->GetSize(& width, & height);
  82     rect.x = x; rect.y = y;
  83     rect.width = width; rect.height = height;
  84
  85     return StartDrawingOnTop(& rect);
  86 }
  87
  88 bool wxScreenDCImpl::StartDrawingOnTop(wxRect* rect)
  89 {
  90     if (sm_overlayWindow)
  91         return false;
  92
  93     Display *dpy = (Display*) wxGetDisplay();
  94     Pixmap screenPixmap = RootWindow(dpy, DefaultScreen(dpy));
  95
  96     int x = 0;
  97     int y = 0;
  98     int width, height;
  99     wxDisplaySize(&width, &height);
 100
 101     if (rect)
 102     {
 103         x = rect->x; y = rect->y;
 104         width = rect->width; height = rect->height;
 105     }
 106     sm_overlayWindowX = x;
 107     sm_overlayWindowY = y;
 108
 109     XSetWindowAttributes attributes;
 110     attributes.override_redirect = True;
 111     unsigned long valueMask = CWOverrideRedirect;
 112
 113     sm_overlayWindow = (WXWindow) XCreateWindow(dpy, screenPixmap, x, y, width, height, 0,
 114         wxDisplayDepth(), InputOutput,
 115         DefaultVisual(dpy, 0), valueMask,
 116         & attributes);
 117
 118     if (sm_overlayWindow)
 119     {
 120         XMapWindow(dpy, (Window) sm_overlayWindow);
 121         return true;
 122     }
 123     else
 124         return false;
 125 }
 126
 127 bool wxScreenDCImpl::EndDrawingOnTop()
 128 {
 129     if (sm_overlayWindow)
 130     {
 131         XDestroyWindow((Display*) wxGetDisplay(), (Window) sm_overlayWindow);
 132         sm_overlayWindow = 0;
 133         return true;
 134     }
 135     else
 136         return false;
 137 }