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,
  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
 116                 XResizeWindow(dpy, priv->window, options.width, options.height);
 117
 118         if(fullscreen_changed && was_visible)
 119                 show();
 120 }
 121
 122 void Window::show_cursor(bool s)
 123 {
 124         DisplayHandle dpy = display.get_private().display;
 125
 126         if(s)
 127                 XUndefineCursor(dpy, priv->window);
 128         else
 129         {
 130                 if(!priv->invisible_cursor)
 131                 {
 132                         int screen = DefaultScreen(dpy);
 133
 134                         Pixmap pm = XCreatePixmap(dpy, priv->window, 1, 1, 1);
 135                         GC gc = XCreateGC(dpy, pm, 0, 0);
 136                         XSetFunction(dpy, gc, GXclear);
 137                         XDrawPoint(dpy, pm, gc, 0, 0);
 138                         XFreeGC(dpy, gc);
 139
 140                         XColor black;
 141                         black.pixel = BlackPixel(dpy, screen);
 142                         XQueryColor(dpy, DefaultColormap(dpy, screen), &black);
 143
 144                         priv->invisible_cursor = XCreatePixmapCursor(dpy, pm, pm, &black, &black, 0, 0);
 145
 146                         XFreePixmap(dpy, pm);
 147                 }
 148                 XDefineCursor(dpy, priv->window, priv->invisible_cursor);
 149         }
 150 }
 151
 152 void Window::warp_pointer(int x, int y)
 153 {
 154         XWarpPointer(display.get_private().display, None, priv->window, 0, 0, 0, 0, x, y);
 155 }
 156
 157 void Window::platform_set_touch_input()
 158 {
 159 }
 160
 161 void Window::platform_show()
 162 {
 163         XMapRaised(display.get_private().display, priv->window);
 164 }
 165
 166 void Window::platform_hide()
 167 {
 168         XUnmapWindow(display.get_private().display, priv->window);
 169 }
 170
 171 bool Window::event(const Event &evnt)
 172 {
 173         const XEvent &ev = evnt.xevent;
 174         switch(ev.type)
 175         {
 176         case ButtonPress:
 177         case ButtonRelease:
 178         case MotionNotify:
 179         case KeyPress:
 180         case KeyRelease:
 181                 signal_input_event.emit(evnt);
 182                 break;
 183         case ConfigureNotify:
 184                 if((ev.xconfigure.width==static_cast<int>(options.width) && ev.xconfigure.height==static_cast<int>(options.height)) == resizing)
 185                 {
 186                         options.width = ev.xconfigure.width;
 187                         options.height = ev.xconfigure.height;
 188                         resizing = false;
 189                         signal_resize.emit(options.width, options.height);
 190                 }
 191
 192                 {
 193                         int x = ev.xconfigure.x;
 194                         int y = ev.xconfigure.y;
 195
 196                         if(priv->reparented)
 197                         {
 198                                 if(!ev.xconfigure.send_event)
 199                                 {
 200                                         /* If the window manager reparented us, the coordinates of a
 201                                         real event are in the parent window's space. */
 202                                         priv->rel_x = ev.xconfigure.x;
 203                                         priv->rel_y = ev.xconfigure.y;
 204
 205                                         const Display::Private &dpy_priv = display.get_private();
 206                                         WindowHandle dummy;
 207                                         XTranslateCoordinates(dpy_priv.display, priv->window, dpy_priv.root_window, 0, 0, &x, &y, &dummy);
 208                                 }
 209
 210                                 // Use the coordinates of the window manager frame
 211                                 x -= priv->rel_x;
 212                                 y -= priv->rel_y;
 213                         }
 214
 215                         if(x!=options.x || y!=options.y)
 216                         {
 217                                 options.x = x;
 218                                 options.y = y;
 219                                 signal_move.emit(options.x, options.y);
 220                         }
 221                 }
 222
 223                 break;
 224         case ReparentNotify:
 225                 priv->reparented = (ev.xreparent.parent!=display.get_private().root_window);
 226                 if(!priv->reparented)
 227                 {
 228                         priv->rel_x = 0;
 229                         priv->rel_y = 0;
 230                 }
 231                 break;
 232         case ClientMessage:
 233                 if(ev.xclient.data.l[0]==static_cast<long>(priv->wm_delete_window))
 234                         signal_close.emit();
 235                 break;
 236         case EnterNotify:
 237                 if(options.fullscreen)
 238                         XSetInputFocus(display.get_private().display, priv->window, RevertToParent, CurrentTime);
 239                 break;
 240         case MapNotify:
 241                 if(options.fullscreen)
 242                         XGrabPointer(display.get_private().display, priv->window, true, None, GrabModeAsync, GrabModeAsync, priv->window, None, CurrentTime);
 243                 break;
 244         case Expose:
 245                 signal_expose.emit(ev.xexpose.x, ev.xexpose.y, ev.xexpose.width, ev.xexpose.height, evnt);
 246                 break;
 247         default:
 248                 return false;
 249         }
 250
 251         return true;
 252 }
 253
 254 } // namespace Graphics
 255 } // namespace Msp