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         priv->reparented = false;
  30         priv->rel_x = 0;
  31         priv->rel_y = 0;
  32
  33         XSetWindowAttributes attr;
  34         attr.override_redirect = options.fullscreen;
  35         attr.event_mask = ButtonPressMask|ButtonReleaseMask|PointerMotionMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask|EnterWindowMask|ExposureMask;
  36
  37         priv->window = XCreateWindow(dpy,
  38                 display.get_private().root_window,
  39                 0, 0,    // User position is set when the window is mapped
  40                 options.width, options.height,
  41                 0,
  42                 CopyFromParent,
  43                 InputOutput,
  44                 CopyFromParent,
  45                 CWOverrideRedirect|CWEventMask, &attr);
  46
  47         XSetWMProtocols(dpy, priv->window, &priv->wm_delete_window, 1);
  48
  49         if(!options.resizable)
  50         {
  51                 XSizeHints hints;
  52                 hints.flags = PMinSize|PMaxSize;
  53                 hints.min_width=hints.max_width = options.width;
  54                 hints.min_height=hints.max_height = options.height;
  55                 XSetWMNormalHints(dpy, priv->window, &hints);
  56         }
  57 }
  58
  59 void Window::platform_cleanup()
  60 {
  61         if(priv->window)
  62                 XDestroyWindow(display.get_private().display, priv->window);
  63
  64         if(priv->invisible_cursor)
  65                 XFreeCursor(display.get_private().display, priv->invisible_cursor);
  66 }
  67
  68 void Window::set_title(const string &title)
  69 {
  70         vector<unsigned char> buf(title.begin(), title.end());
  71         XTextProperty prop;
  72         prop.value = &buf[0];
  73         prop.encoding = XA_STRING;
  74         prop.format = 8;
  75         prop.nitems = title.size();
  76         XSetWMName(display.get_private().display, priv->window, &prop);
  77         display.check_error();
  78 }
  79
  80 void Window::platform_reconfigure(bool fullscreen_changed)
  81 {
  82         DisplayHandle dpy = display.get_private().display;
  83
  84         bool was_visible = visible;
  85         if(fullscreen_changed)
  86         {
  87                 if(was_visible)
  88                 {
  89                         hide();
  90
  91                         // Wait for the window to be unmapped.  This makes window managers happy.
  92                         XEvent ev;
  93                         int ev_type = UnmapNotify;
  94                         XPeekIfEvent(dpy, &ev, match_event_type, reinterpret_cast<char *>(&ev_type));
  95                 }
  96
  97                 XSetWindowAttributes attr;
  98                 attr.override_redirect = options.fullscreen;
  99                 XChangeWindowAttributes(dpy, priv->window, CWOverrideRedirect, &attr);
 100         }
 101
 102         XSizeHints hints;
 103         if(options.resizable)
 104                 hints.flags = 0;
 105         else
 106         {
 107                 hints.flags = PMinSize|PMaxSize;
 108                 hints.min_width = hints.max_width = options.width;
 109                 hints.min_height = hints.max_height = options.height;
 110         }
 111         XSetWMNormalHints(dpy, priv->window, &hints);
 112
 113         if(options.fullscreen)
 114                 XMoveResizeWindow(dpy, priv->window, 0, 0, options.width, options.height);
 115         else if(options.user_position)
 116                 XMoveResizeWindow(dpy, priv->window, options.x, options.y, options.width, options.height);
 117         else
 118                 XResizeWindow(dpy, priv->window, options.width, options.height);
 119
 120         if(fullscreen_changed && was_visible)
 121                 show();
 122 }
 123
 124 void Window::show_cursor(bool s)
 125 {
 126         DisplayHandle dpy = display.get_private().display;
 127
 128         if(s)
 129                 XUndefineCursor(dpy, priv->window);
 130         else
 131         {
 132                 if(!priv->invisible_cursor)
 133                 {
 134                         int screen = DefaultScreen(dpy);
 135
 136                         Pixmap pm = XCreatePixmap(dpy, priv->window, 1, 1, 1);
 137                         GC gc = XCreateGC(dpy, pm, 0, 0);
 138                         XSetFunction(dpy, gc, GXclear);
 139                         XDrawPoint(dpy, pm, gc, 0, 0);
 140                         XFreeGC(dpy, gc);
 141
 142                         XColor black;
 143                         black.pixel = BlackPixel(dpy, screen);
 144                         XQueryColor(dpy, DefaultColormap(dpy, screen), &black);
 145
 146                         priv->invisible_cursor = XCreatePixmapCursor(dpy, pm, pm, &black, &black, 0, 0);
 147
 148                         XFreePixmap(dpy, pm);
 149                 }
 150                 XDefineCursor(dpy, priv->window, priv->invisible_cursor);
 151         }
 152 }
 153
 154 void Window::warp_pointer(int x, int y)
 155 {
 156         XWarpPointer(display.get_private().display, None, priv->window, 0, 0, 0, 0, x, y);
 157 }
 158
 159 void Window::platform_set_touch_input()
 160 {
 161 }
 162
 163 void Window::platform_show()
 164 {
 165         DisplayHandle dpy = display.get_private().display;
 166         XMapRaised(dpy, priv->window);
 167         if(options.user_position)
 168                 XMoveWindow(dpy, priv->window, options.x, options.y);
 169 }
 170
 171 void Window::platform_hide()
 172 {
 173         XUnmapWindow(display.get_private().display, priv->window);
 174 }
 175
 176 bool Window::event(const Event &evnt)
 177 {
 178         const XEvent &ev = evnt.xevent;
 179         switch(ev.type)
 180         {
 181         case ButtonPress:
 182         case ButtonRelease:
 183         case MotionNotify:
 184         case KeyPress:
 185         case KeyRelease:
 186                 signal_input_event.emit(evnt);
 187                 break;
 188         case ConfigureNotify:
 189                 if((ev.xconfigure.width==static_cast<int>(options.width) && ev.xconfigure.height==static_cast<int>(options.height)) == resizing)
 190                 {
 191                         options.width = ev.xconfigure.width;
 192                         options.height = ev.xconfigure.height;
 193                         resizing = false;
 194                         signal_resize.emit(options.width, options.height);
 195                 }
 196
 197                 {
 198                         int x = ev.xconfigure.x;
 199                         int y = ev.xconfigure.y;
 200
 201                         if(priv->reparented)
 202                         {
 203                                 if(!ev.xconfigure.send_event)
 204                                 {
 205                                         /* If the window manager reparented us, the coordinates of a
 206                                         real event are in the parent window's space. */
 207                                         priv->rel_x = ev.xconfigure.x;
 208                                         priv->rel_y = ev.xconfigure.y;
 209
 210                                         const Display::Private &dpy_priv = display.get_private();
 211                                         WindowHandle dummy;
 212                                         XTranslateCoordinates(dpy_priv.display, priv->window, dpy_priv.root_window, 0, 0, &x, &y, &dummy);
 213                                 }
 214
 215                                 // Use the coordinates of the window manager frame
 216                                 x -= priv->rel_x;
 217                                 y -= priv->rel_y;
 218                         }
 219
 220                         if((x==options.x && y==options.y) == moving)
 221                         {
 222                                 options.x = x;
 223                                 options.y = y;
 224                                 moving = false;
 225                                 signal_move.emit(options.x, options.y);
 226                         }
 227                 }
 228
 229                 break;
 230         case ReparentNotify:
 231                 priv->reparented = (ev.xreparent.parent!=display.get_private().root_window);
 232                 if(!priv->reparented)
 233                 {
 234                         priv->rel_x = 0;
 235                         priv->rel_y = 0;
 236                 }
 237                 break;
 238         case ClientMessage:
 239                 if(ev.xclient.data.l[0]==static_cast<long>(priv->wm_delete_window))
 240                         signal_close.emit();
 241                 break;
 242         case EnterNotify:
 243                 if(options.fullscreen)
 244                         XSetInputFocus(display.get_private().display, priv->window, RevertToParent, CurrentTime);
 245                 break;
 246         case MapNotify:
 247                 if(options.fullscreen)
 248                         XGrabPointer(display.get_private().display, priv->window, true, None, GrabModeAsync, GrabModeAsync, priv->window, None, CurrentTime);
 249                 break;
 250         case Expose:
 251                 signal_expose.emit(ev.xexpose.x, ev.xexpose.y, ev.xexpose.width, ev.xexpose.height, evnt);
 252                 break;
 253         default:
 254                 return false;
 255         }
 256
 257         return true;
 258 }
 259
 260 } // namespace Graphics
 261 } // namespace Msp