source/graphics/window.cpp

   1 #include <vector>
   2 #ifndef WIN32
   3 #include <X11/Xatom.h>
   4 #include <X11/Xutil.h>
   5 #ifdef WITH_XF86VIDMODE
   6 #include <X11/extensions/xf86vmode.h>
   7 #endif
   8 #else
   9 #include <windowsx.h>
  10 #endif
  11 #include <msp/core/application.h>
  12 #include "display.h"
  13 #include "window.h"
  14 #include "display_priv.h"
  15
  16 using namespace std;
  17
  18 namespace {
  19
  20 #ifdef WIN32
  21 LRESULT CALLBACK wndproc_(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
  22 {
  23         if(msg==WM_CREATE)
  24         {
  25                 CREATESTRUCT *cs = reinterpret_cast<CREATESTRUCT *>(lparam);
  26                 SetWindowLong(hwnd, 0, reinterpret_cast<LONG>(cs->lpCreateParams));
  27         }
  28         else
  29         {
  30                 Msp::Graphics::Window *wnd = reinterpret_cast<Msp::Graphics::Window *>(GetWindowLong(hwnd, 0));
  31                 Msp::Graphics::Window::Event ev;
  32                 ev.msg = msg;
  33                 ev.wparam = wparam;
  34                 ev.lparam = lparam;
  35                 if(wnd && wnd->event(ev))
  36                         return 0;
  37         }
  38
  39         return DefWindowProc(hwnd, msg, wparam, lparam);
  40 }
  41 #else
  42 Bool match_event_type(Display *, XEvent *event, XPointer arg)
  43 {
  44         return event->type==*reinterpret_cast<int *>(arg);
  45 }
  46 #endif
  47
  48 }
  49
  50 namespace Msp {
  51 namespace Graphics {
  52
  53 WindowOptions::WindowOptions():
  54         width(640),
  55         height(480),
  56         fullscreen(false),
  57         resizable(false)
  58 { }
  59
  60
  61 Window::Window(Display &dpy, unsigned w, unsigned h, bool fs):
  62         display(dpy)
  63 {
  64         options.width = w;
  65         options.height = h;
  66         options.fullscreen = fs;
  67
  68         init();
  69 }
  70
  71 Window::Window(Display &dpy, const WindowOptions &opts):
  72         display(dpy),
  73         options(opts)
  74 {
  75         init();
  76 }
  77
  78 void Window::init()
  79 {
  80         visible = false;
  81         kbd_autorepeat = true;
  82         resizing = false;
  83         priv = new Private;
  84
  85 #ifdef WIN32
  86         static bool wndclass_created = false;
  87
  88         if(!wndclass_created)
  89         {
  90                 WNDCLASSEX wndcl;
  91
  92                 wndcl.cbSize = sizeof(WNDCLASSEX);
  93                 wndcl.style = 0;
  94                 wndcl.lpfnWndProc = &wndproc_;
  95                 wndcl.cbClsExtra = 0;
  96                 wndcl.cbWndExtra = sizeof(Window *);
  97                 wndcl.hInstance = reinterpret_cast<HINSTANCE>(Application::get_data());
  98                 wndcl.hIcon = 0;
  99                 wndcl.hCursor = LoadCursor(0, IDC_ARROW);
 100                 wndcl.hbrBackground = 0;
 101                 wndcl.lpszMenuName = 0;
 102                 wndcl.lpszClassName = "mspgui";
 103                 wndcl.hIconSm = 0;
 104
 105                 if(!RegisterClassEx(&wndcl))
 106                         throw system_error("RegisterClassEx");
 107
 108                 wndclass_created = true;
 109         }
 110
 111         RECT rect;
 112         SetRect(&rect, 0, 0, options.width, options.height);
 113
 114         int style = (options.fullscreen ? WS_POPUP : WS_OVERLAPPEDWINDOW);
 115         if(!options.resizable)
 116                 style &= ~WS_THICKFRAME;
 117         int exstyle = (options.fullscreen ? WS_EX_APPWINDOW : WS_EX_OVERLAPPEDWINDOW);
 118         AdjustWindowRectEx(&rect, style, false, exstyle);
 119
 120         priv->window = CreateWindowEx(exstyle,
 121                 "mspgui",
 122                 "Window",
 123                 style,
 124                 CW_USEDEFAULT, CW_USEDEFAULT,
 125                 rect.right-rect.left, rect.bottom-rect.top,
 126                 0,
 127                 0,
 128                 reinterpret_cast<HINSTANCE>(Application::get_data()),
 129                 this);
 130         if(!priv->window)
 131                 throw system_error("CreateWindowEx");
 132
 133 #else
 134         ::Display *dpy = display.get_private().display;
 135
 136         priv->wm_delete_window = XInternAtom(dpy, "WM_DELETE_WINDOW", true);
 137         priv->invisible_cursor = 0;
 138
 139         XSetWindowAttributes attr;
 140         attr.override_redirect = options.fullscreen;
 141         attr.event_mask = ButtonPressMask|ButtonReleaseMask|PointerMotionMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask|EnterWindowMask;
 142
 143         priv->window = XCreateWindow(dpy,
 144                 DefaultRootWindow(dpy),
 145                 0, 0,
 146                 options.width, options.height,
 147                 0,
 148                 CopyFromParent,
 149                 InputOutput,
 150                 CopyFromParent,
 151                 CWOverrideRedirect|CWEventMask, &attr);
 152
 153         XSetWMProtocols(dpy, priv->window, &priv->wm_delete_window, 1);
 154
 155         if(!options.resizable)
 156         {
 157                 XSizeHints hints;
 158                 hints.flags = PMinSize|PMaxSize;
 159                 hints.min_width=hints.max_width = options.width;
 160                 hints.min_height=hints.max_height = options.height;
 161                 XSetWMNormalHints(dpy, priv->window, &hints);
 162         }
 163
 164 #endif
 165
 166         display.add_window(*this);
 167         display.check_error();
 168 }
 169
 170 Window::~Window()
 171 {
 172         if(priv->window)
 173 #ifdef WIN32
 174                 CloseWindow(priv->window);
 175 #else
 176                 XDestroyWindow(display.get_private().display, priv->window);
 177
 178         if(priv->invisible_cursor)
 179                 XFreeCursor(display.get_private().display, priv->invisible_cursor);
 180 #endif
 181
 182         display.remove_window(*this);
 183
 184         if(options.fullscreen)
 185                 display.restore_mode();
 186
 187         delete priv;
 188 }
 189
 190 void Window::set_title(const string &title)
 191 {
 192 #ifdef WIN32
 193         SetWindowText(priv->window, title.c_str());
 194 #else
 195         vector<unsigned char> buf(title.begin(), title.end());
 196         XTextProperty prop;
 197         prop.value = &buf[0];
 198         prop.encoding = XA_STRING;
 199         prop.format = 8;
 200         prop.nitems = title.size();
 201         XSetWMName(display.get_private().display, priv->window, &prop);
 202         display.check_error();
 203 #endif
 204 }
 205
 206 void Window::reconfigure(const WindowOptions &opts)
 207 {
 208         bool fullscreen_changed = (opts.fullscreen!=options.fullscreen);
 209         resizing = (opts.width!=options.width || opts.height!=options.height);
 210
 211         options = opts;
 212
 213 #ifdef WIN32
 214         RECT rect;
 215         SetRect(&rect, 0, 0, options.width, options.height);
 216
 217         int style = (options.fullscreen ? WS_POPUP : WS_OVERLAPPEDWINDOW);
 218         if(!options.resizable)
 219                 style &= ~WS_THICKFRAME;
 220         int exstyle = (options.fullscreen ? WS_EX_APPWINDOW : WS_EX_OVERLAPPEDWINDOW);
 221         AdjustWindowRectEx(&rect, style, false, exstyle);
 222
 223         if(fullscreen_changed)
 224         {
 225                 hide();
 226                 SetWindowLong(priv->window, GWL_EXSTYLE, exstyle);
 227                 SetWindowLong(priv->window, GWL_STYLE, style);
 228                 show();
 229         }
 230
 231         if(options.fullscreen)
 232                 SetWindowPos(priv->window, 0, 0, 0, rect.right-rect.left, rect.bottom-rect.top, SWP_NOZORDER);
 233         else
 234                 SetWindowPos(priv->window, 0, 0, 0, rect.right-rect.left, rect.bottom-rect.top, SWP_NOMOVE|SWP_NOZORDER);
 235 #else
 236         ::Display *dpy = display.get_private().display;
 237
 238         bool was_visible = visible;
 239         if(fullscreen_changed)
 240         {
 241                 if(was_visible)
 242                 {
 243                         hide();
 244
 245                         // Wait for the window to be unmapped.  This makes window managers happy.
 246                         XEvent ev;
 247                         int ev_type = UnmapNotify;
 248                         XPeekIfEvent(dpy, &ev, match_event_type, reinterpret_cast<char *>(&ev_type));
 249                 }
 250
 251                 XSetWindowAttributes attr;
 252                 attr.override_redirect = options.fullscreen;
 253                 XChangeWindowAttributes(dpy, priv->window, CWOverrideRedirect, &attr);
 254         }
 255
 256         XSizeHints hints;
 257         if(options.resizable)
 258                 hints.flags = 0;
 259         else
 260         {
 261                 hints.flags = PMinSize|PMaxSize;
 262                 hints.min_width=hints.max_width = options.width;
 263                 hints.min_height=hints.max_height = options.height;
 264         }
 265         XSetWMNormalHints(dpy, priv->window, &hints);
 266
 267         if(options.fullscreen)
 268                 XMoveResizeWindow(dpy, priv->window, 0, 0, options.width, options.height);
 269         else
 270                 XResizeWindow(dpy, priv->window, options.width, options.height);
 271
 272         if(fullscreen_changed)
 273         {
 274                 if(was_visible)
 275                         show();
 276         }
 277 #endif
 278
 279         if(visible)
 280         {
 281                 if(options.fullscreen)
 282                         display.set_mode(VideoMode(options.width, options.height));
 283                 else if(fullscreen_changed)
 284                         display.restore_mode();
 285         }
 286 }
 287
 288 void Window::set_keyboard_autorepeat(bool r)
 289 {
 290         kbd_autorepeat = r;
 291 }
 292
 293 void Window::show_cursor(bool s)
 294 {
 295 #ifdef WIN32
 296         ShowCursor(s);
 297 #else
 298         ::Display *dpy = display.get_private().display;
 299
 300         if(s)
 301                 XUndefineCursor(dpy, priv->window);
 302         else
 303         {
 304                 if(!priv->invisible_cursor)
 305                 {
 306                         int screen = DefaultScreen(dpy);
 307
 308                         Pixmap pm = XCreatePixmap(dpy, priv->window, 1, 1, 1);
 309                         GC gc = XCreateGC(dpy, pm, 0, 0);
 310                         XSetFunction(dpy, gc, GXclear);
 311                         XDrawPoint(dpy, pm, gc, 0, 0);
 312                         XFreeGC(dpy, gc);
 313
 314                         XColor black;
 315                         black.pixel = BlackPixel(dpy, screen);
 316                         XQueryColor(dpy, DefaultColormap(dpy, screen), &black);
 317
 318                         priv->invisible_cursor = XCreatePixmapCursor(dpy, pm, pm, &black, &black, 0, 0);
 319
 320                         XFreePixmap(dpy, pm);
 321                 }
 322                 XDefineCursor(dpy, priv->window, priv->invisible_cursor);
 323         }
 324 #endif
 325 }
 326
 327 void Window::warp_pointer(int x, int y)
 328 {
 329 #ifndef WIN32
 330         XWarpPointer(display.get_private().display, None, priv->window, 0, 0, 0, 0, x, y);
 331 #else
 332         (void)x;
 333         (void)y;
 334 #endif
 335 }
 336
 337 void Window::show()
 338 {
 339 #ifdef WIN32
 340         ShowWindow(priv->window, SW_SHOWNORMAL);
 341 #else
 342         XMapRaised(display.get_private().display, priv->window);
 343 #endif
 344         visible = true;
 345
 346         if(options.fullscreen)
 347         {
 348                 display.set_mode(VideoMode(options.width, options.height));
 349 #ifndef WIN32
 350                 XWarpPointer(display.get_private().display, None, priv->window, 0, 0, 0, 0, options.width/2, options.height/2);
 351 #endif
 352         }
 353 }
 354
 355 void Window::hide()
 356 {
 357 #ifdef WIN32
 358         ShowWindow(priv->window, SW_HIDE);
 359 #else
 360         XUnmapWindow(display.get_private().display, priv->window);
 361 #endif
 362         visible = false;
 363
 364         if(options.fullscreen)
 365                 display.restore_mode();
 366 }
 367
 368 bool Window::event(const Event &evnt)
 369 {
 370 #ifdef WIN32
 371         WPARAM wp = evnt.wparam;
 372         LPARAM lp = evnt.lparam;
 373         switch(evnt.msg)
 374         {
 375         case WM_KEYDOWN:
 376                 signal_key_press.emit(wp, 0, wp);
 377                 break;
 378         case WM_KEYUP:
 379                 signal_key_release.emit(wp, 0);
 380                 break;
 381         case WM_LBUTTONDOWN:
 382                 signal_button_press.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 1, 0);
 383                 break;
 384         case WM_LBUTTONUP:
 385                 signal_button_release.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 1, 0);
 386                 break;
 387         case WM_MBUTTONDOWN:
 388                 signal_button_press.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 2, 0);
 389                 break;
 390         case WM_MBUTTONUP:
 391                 signal_button_release.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 2, 0);
 392                 break;
 393         case WM_RBUTTONDOWN:
 394                 signal_button_press.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 3, 0);
 395                 break;
 396         case WM_RBUTTONUP:
 397                 signal_button_release.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), 3, 0);
 398                 break;
 399         case WM_MOUSEWHEEL:
 400                 {
 401                         unsigned btn = (HIWORD(wp)&0x8000) ? 5 : 4;
 402                         signal_button_press.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), btn, 0);
 403                         signal_button_release.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp), btn, 0);
 404                 }
 405                 break;
 406         case WM_MOUSEMOVE:
 407                 signal_pointer_motion.emit(GET_X_LPARAM(lp), GET_Y_LPARAM(lp));
 408                 break;
 409         case WM_SIZE:
 410                 options.width = LOWORD(lp);
 411                 options.height = HIWORD(lp);
 412                 signal_resize.emit(options.width, options.height);
 413                 break;
 414         case WM_CLOSE:
 415                 signal_close.emit();
 416                 break;
 417         default:
 418                 return false;
 419         }
 420 #else
 421         const XEvent &ev = evnt.xevent;
 422         switch(ev.type)
 423         {
 424         case ButtonPress:
 425                 signal_button_press.emit(ev.xbutton.x, ev.xbutton.y, ev.xbutton.button, ev.xbutton.state);
 426                 break;
 427         case ButtonRelease:
 428                 signal_button_release.emit(ev.xbutton.x, ev.xbutton.y, ev.xbutton.button, ev.xbutton.state);
 429                 break;
 430         case MotionNotify:
 431                 signal_pointer_motion.emit(ev.xmotion.x, ev.xmotion.y);
 432                 break;
 433         case KeyPress:
 434                 {
 435                         char buf[16];
 436                         XLookupString(const_cast<XKeyEvent *>(&ev.xkey), buf, sizeof(buf), 0, 0);
 437                         // XXX Handle the result according to locale
 438                         signal_key_press.emit(XKeycodeToKeysym(display.get_private().display, ev.xkey.keycode, 0), ev.xkey.state, buf[0]);
 439                 }
 440                 break;
 441         case KeyRelease:
 442                 signal_key_release.emit(XKeycodeToKeysym(display.get_private().display, ev.xkey.keycode, 0), ev.xkey.state);
 443                 break;
 444         case ConfigureNotify:
 445                 if((ev.xconfigure.width==static_cast<int>(options.width) && ev.xconfigure.height==static_cast<int>(options.height)) == resizing)
 446                 {
 447                         options.width = ev.xconfigure.width;
 448                         options.height = ev.xconfigure.height;
 449                         resizing = false;
 450                         signal_resize.emit(options.width, options.height);
 451                 }
 452 #ifdef WITH_XF86VIDMODE
 453                 if(options.fullscreen)
 454                 {
 455                         ::Display *dpy = display.get_private().display;
 456                         int screen = DefaultScreen(dpy);
 457                         XF86VidModeSetViewPort(dpy, screen, ev.xconfigure.x, ev.xconfigure.y);
 458                 }
 459 #endif
 460                 break;
 461         case ClientMessage:
 462                 if(ev.xclient.data.l[0]==static_cast<long>(priv->wm_delete_window))
 463                         signal_close.emit();
 464                 break;
 465         case EnterNotify:
 466                 if(options.fullscreen)
 467                         XSetInputFocus(display.get_private().display, priv->window, RevertToParent, CurrentTime);
 468                 break;
 469         case MapNotify:
 470                 if(options.fullscreen)
 471                         XGrabPointer(display.get_private().display, priv->window, true, None, GrabModeAsync, GrabModeAsync, priv->window, None, CurrentTime);
 472                 break;
 473         default:
 474                 return false;
 475         }
 476 #endif
 477         return true;
 478 }
 479
 480 } // namespace Graphics
 481 } // namespace Msp