source/window.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgbase
   4 Copyright © 2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <vector>
   9 #include <X11/Xatom.h>
  10 #include <X11/Xutil.h>
  11 #include <msp/core/except.h>
  12 #include "window.h"
  13
  14 using namespace std;
  15
  16 namespace Msp {
  17
  18 DisplayOptions::DisplayOptions():
  19         width(640),
  20         height(480),
  21         fullscreen(false)
  22 { }
  23
  24
  25 /**
  26 Initializes the class but does not open the window.  Intended for use by
  27 derived classes.
  28 */
  29 Window::Window():
  30         display(0),
  31         window(0)
  32 { }
  33
  34 Window::Window(unsigned w, unsigned h)
  35 {
  36         options.width=w;
  37         options.height=h;
  38
  39         init();
  40 }
  41
  42 Window::Window(const DisplayOptions &dopt):
  43         options(dopt)
  44 {
  45         init();
  46 }
  47
  48 Window::~Window()
  49 {
  50         if(window)
  51                 XDestroyWindow(display, window);
  52         if(display)
  53                 XCloseDisplay(display);
  54 }
  55
  56 void Window::set_title(const string &title)
  57 {
  58         vector<unsigned char> buf(title.begin(), title.end());
  59         XTextProperty prop;
  60         prop.value=&buf[0];
  61         prop.encoding=XA_STRING;
  62         prop.format=8;
  63         prop.nitems=title.size();
  64         XSetWMName(display, window, &prop);
  65 }
  66
  67 void Window::show()
  68 {
  69         XMapRaised(display, window);
  70 }
  71
  72 void Window::hide()
  73 {
  74         XUnmapWindow(display, window);
  75 }
  76
  77 void Window::tick()
  78 {
  79         while(1)
  80         {
  81                 int pending=XPending(display);
  82                 if(pending==0)
  83                         break;
  84
  85                 for(int i=0; i<pending; ++i)
  86                 {
  87                         XEvent event;
  88                         XNextEvent(display, &event);
  89                         process_event(event);
  90                 }
  91         }
  92 }
  93
  94 void Window::prepare()
  95 {
  96         if(options.display.empty())
  97                 display=XOpenDisplay(0);
  98         else
  99                 display=XOpenDisplay(options.display.c_str());
 100         if(!display)
 101                 throw Exception("Couldn't open X display");
 102
 103         wm_delete_window=XInternAtom(display, "WM_DELETE_WINDOW", true);
 104
 105         /* Throwing from the error handler doesn't work too well and I don't know
 106            how to dig up all the information that Xlib gives by default, so disable
 107                 custom error handling for now. */
 108         //XSetErrorHandler(x_error_handler);
 109 }
 110
 111 void Window::set_window(Handle wnd)
 112 {
 113         window=wnd;
 114
 115         XSelectInput(display, window, ButtonPressMask|ButtonReleaseMask|PointerMotionMask|KeyPressMask|KeyReleaseMask|StructureNotifyMask|EnterWindowMask);
 116
 117         XSetWMProtocols(display, window, &wm_delete_window, 1);
 118 }
 119
 120 void Window::init()
 121 {
 122         prepare();
 123
 124         XSetWindowAttributes attr;
 125         attr.override_redirect=options.fullscreen;
 126
 127         Handle wnd=XCreateWindow(display, DefaultRootWindow(display), 0, 0, options.width, options.height, 0, CopyFromParent, InputOutput, CopyFromParent, CWOverrideRedirect, &attr);
 128         set_window(wnd);
 129 }
 130
 131 void Window::process_event(const XEvent &event)
 132 {
 133         switch(event.type)
 134         {
 135         case ButtonPress:
 136                 signal_button_press.emit(event.xbutton.x, event.xbutton.y, event.xbutton.button, event.xbutton.state);
 137                 break;
 138         case ButtonRelease:
 139                 signal_button_release.emit(event.xbutton.x, event.xbutton.y, event.xbutton.button, event.xbutton.state);
 140                 break;
 141         case MotionNotify:
 142                 signal_pointer_motion.emit(event.xmotion.x, event.xmotion.y);
 143                 break;
 144         case KeyPress:
 145                 {
 146                         char buf[16];
 147                         XLookupString(const_cast<XKeyEvent *>(&event.xkey), buf, sizeof(buf), 0, 0);
 148                         // XXX Handle the result according to locale
 149                         signal_key_press.emit(event.xkey.keycode, event.xkey.state, buf[0]);
 150                 }
 151                 break;
 152         case KeyRelease:
 153                 signal_key_release.emit(event.xkey.keycode, event.xkey.state);
 154                 break;
 155         case ConfigureNotify:
 156                 options.width=event.xconfigure.width;
 157                 options.height=event.xconfigure.height;
 158                 signal_resize.emit(options.width, options.height);
 159                 break;
 160         case ClientMessage:
 161                 if(event.xclient.data.l[0]==static_cast<long>(wm_delete_window))
 162                         signal_close.emit();
 163                 break;
 164         case EnterNotify:
 165                 XSetInputFocus(display, window, RevertToParent, CurrentTime);
 166                 break;
 167         default:;
 168         }
 169
 170         on_event(event);
 171 }
 172
 173 int Window::x_error_handler(Display *display, XErrorEvent *error)
 174 {
 175         char buf[128];
 176         XGetErrorText(display, error->error_code, buf, sizeof(buf));
 177         /*string request_code=lexical_cast(error->request_code);
 178         char buf2[1024];
 179         XGetErrorDatabaseText(display, "XRequest", request_code.c_str(), buf, buf2, sizeof(buf2));*/
 180         throw Exception(buf);
 181 }
 182
 183 } // namespace Msp