source/graphics/x11/window.cpp

   1 #include <vector>
   2 #include <X11/Xatom.h>
   3 #include <X11/Xutil.h>
   4 #include <msp/core/systemerror.h>
   5 #include "display_private.h"
   6 #include "window.h"
   7 #include "window_private.h"
   8
   9 using namespace std;
  10
  11 namespace {
  12
  13 Bool match_event_type(Display *, XEvent *event, XPointer arg)
  14 {
  15         return event->type==*reinterpret_cast<int *>(arg);
  16 }
  17
  18 }
  19
  20 namespace Msp {
  21 namespace Graphics {
  22
  23 void Window::platform_init()
  24 {
  25         DisplayHandle dpy = display.get_private().display;
  26
  27         priv->wm_delete_window = XInternAtom(dpy, "WM_DELETE_WINDOW", true);
  28         priv->invisible_cursor = 0;
  29
  30         XSetWindowAttributes attr;
  31         attr.override_redirect = options.fullscreen;
  32         attr.event_mask = ButtonPressMask|ButtonReleaseMask|PointerMotionMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask|EnterWindowMask;
  33
  34         priv->window = XCreateWindow(dpy,
  35                 DefaultRootWindow(dpy),
  36                 0, 0,
  37                 options.width, options.height,
  38                 0,
  39                 CopyFromParent,
  40                 InputOutput,
  41                 CopyFromParent,
  42                 CWOverrideRedirect|CWEventMask, &attr);
  43
  44         XSetWMProtocols(dpy, priv->window, &priv->wm_delete_window, 1);
  45
  46         if(!options.resizable)
  47         {
  48                 XSizeHints hints;
  49                 hints.flags = PMinSize|PMaxSize;
  50                 hints.min_width=hints.max_width = options.width;
  51                 hints.min_height=hints.max_height = options.height;
  52                 XSetWMNormalHints(dpy, priv->window, &hints);
  53         }
  54 }
  55
  56 void Window::platform_cleanup()
  57 {
  58         if(priv->window)
  59                 XDestroyWindow(display.get_private().display, priv->window);
  60
  61         if(priv->invisible_cursor)
  62                 XFreeCursor(display.get_private().display, priv->invisible_cursor);
  63 }
  64
  65 void Window::set_title(const string &title)
  66 {
  67         vector<unsigned char> buf(title.begin(), title.end());
  68         XTextProperty prop;
  69         prop.value = &buf[0];
  70         prop.encoding = XA_STRING;
  71         prop.format = 8;
  72         prop.nitems = title.size();
  73         XSetWMName(display.get_private().display, priv->window, &prop);
  74         display.check_error();
  75 }
  76
  77 void Window::platform_reconfigure(bool fullscreen_changed)
  78 {
  79         DisplayHandle dpy = display.get_private().display;
  80
  81         bool was_visible = visible;
  82         if(fullscreen_changed)
  83         {
  84                 if(was_visible)
  85                 {
  86                         hide();
  87
  88                         // Wait for the window to be unmapped.  This makes window managers happy.
  89                         XEvent ev;
  90                         int ev_type = UnmapNotify;
  91                         XPeekIfEvent(dpy, &ev, match_event_type, reinterpret_cast<char *>(&ev_type));
  92                 }
  93
  94                 XSetWindowAttributes attr;
  95                 attr.override_redirect = options.fullscreen;
  96                 XChangeWindowAttributes(dpy, priv->window, CWOverrideRedirect, &attr);
  97         }
  98
  99         XSizeHints hints;
 100         if(options.resizable)
 101                 hints.flags = 0;
 102         else
 103         {
 104                 hints.flags = PMinSize|PMaxSize;
 105                 hints.min_width = hints.max_width = options.width;
 106                 hints.min_height = hints.max_height = options.height;
 107         }
 108         XSetWMNormalHints(dpy, priv->window, &hints);
 109
 110         if(options.fullscreen)
 111                 XMoveResizeWindow(dpy, priv->window, 0, 0, options.width, options.height);
 112         else
 113                 XResizeWindow(dpy, priv->window, options.width, options.height);
 114
 115         if(fullscreen_changed && was_visible)
 116                 show();
 117 }
 118
 119 void Window::show_cursor(bool s)
 120 {
 121         DisplayHandle dpy = display.get_private().display;
 122
 123         if(s)
 124                 XUndefineCursor(dpy, priv->window);
 125         else
 126         {
 127                 if(!priv->invisible_cursor)
 128                 {
 129                         int screen = DefaultScreen(dpy);
 130
 131                         Pixmap pm = XCreatePixmap(dpy, priv->window, 1, 1, 1);
 132                         GC gc = XCreateGC(dpy, pm, 0, 0);
 133                         XSetFunction(dpy, gc, GXclear);
 134                         XDrawPoint(dpy, pm, gc, 0, 0);
 135                         XFreeGC(dpy, gc);
 136
 137                         XColor black;
 138                         black.pixel = BlackPixel(dpy, screen);
 139                         XQueryColor(dpy, DefaultColormap(dpy, screen), &black);
 140
 141                         priv->invisible_cursor = XCreatePixmapCursor(dpy, pm, pm, &black, &black, 0, 0);
 142
 143                         XFreePixmap(dpy, pm);
 144                 }
 145                 XDefineCursor(dpy, priv->window, priv->invisible_cursor);
 146         }
 147 }
 148
 149 void Window::warp_pointer(int x, int y)
 150 {
 151         XWarpPointer(display.get_private().display, None, priv->window, 0, 0, 0, 0, x, y);
 152 }
 153
 154 void Window::platform_show()
 155 {
 156         XMapRaised(display.get_private().display, priv->window);
 157 }
 158
 159 void Window::platform_hide()
 160 {
 161         XUnmapWindow(display.get_private().display, priv->window);
 162 }
 163
 164 bool Window::event(const Event &evnt)
 165 {
 166         const XEvent &ev = evnt.xevent;
 167         switch(ev.type)
 168         {
 169         case ButtonPress:
 170         case ButtonRelease:
 171         case MotionNotify:
 172         case KeyPress:
 173         case KeyRelease:
 174                 signal_input_event.emit(evnt);
 175                 break;
 176         case ConfigureNotify:
 177                 if((ev.xconfigure.width==static_cast<int>(options.width) && ev.xconfigure.height==static_cast<int>(options.height)) == resizing)
 178                 {
 179                         options.width = ev.xconfigure.width;
 180                         options.height = ev.xconfigure.height;
 181                         resizing = false;
 182                         signal_resize.emit(options.width, options.height);
 183                 }
 184                 break;
 185         case ClientMessage:
 186                 if(ev.xclient.data.l[0]==static_cast<long>(priv->wm_delete_window))
 187                         signal_close.emit();
 188                 break;
 189         case EnterNotify:
 190                 if(options.fullscreen)
 191                         XSetInputFocus(display.get_private().display, priv->window, RevertToParent, CurrentTime);
 192                 break;
 193         case MapNotify:
 194                 if(options.fullscreen)
 195                         XGrabPointer(display.get_private().display, priv->window, true, None, GrabModeAsync, GrabModeAsync, priv->window, None, CurrentTime);
 196                 break;
 197         default:
 198                 return false;
 199         }
 200
 201         return true;
 202 }
 203
 204 } // namespace Graphics
 205 } // namespace Msp