qt/multypo.cpp

   1 #include "multypo.h"
   2
   3 #include <QX11Info>
   4 #include <QDebug>
   5 #include <QVBoxLayout>
   6 #include <QLabel>
   7
   8 #include <X11/Xlib.h>
   9 #include <X11/extensions/XInput2.h>
  10 #include <X11/Xutil.h>
  11
  12 static QString colorToString(QColor col)
  13 {
  14         return QString("#%1%2%3").arg(col.red(), 2, 16, QChar('0'))
  15                         .arg(col.green(), 2, 16, QChar('0'))
  16                         .arg(col.blue(), 2, 16, QChar('0'));
  17 }
  18
  19 MultypoWindow::MultypoWindow(QWidget *parent) :
  20         QWidget(parent),
  21         xiInited(false)
  22 {
  23         /* Prepare colors */
  24         setStyleSheet("background-color: black; color: green; font-size: 30pt");
  25
  26         /* Prepare conents */
  27         setLayout(new QVBoxLayout(this));
  28
  29         mainLabel = new QLabel("Hit <Esc> to quit", this);
  30         layout()->addWidget(mainLabel);
  31
  32         /* Fullscreen, no cursor */
  33         setWindowState(Qt::WindowFullScreen);
  34         setCursor(QCursor(Qt::BlankCursor));
  35 }
  36
  37 MultypoWindow::~MultypoWindow()
  38 {
  39 }
  40
  41 void MultypoWindow::handleKeyPress(int device, QString string)
  42 {
  43         qDebug() << "Device" << device << "String" << string;
  44
  45         if (string == "Escape")
  46                 close();
  47
  48         if (!players.contains(device)) {
  49                 QLabel *label = new QLabel(this);
  50                 layout()->addWidget(label);
  51                 players[device] = label;
  52         }
  53         QColor textColor = QColor(Qt::blue);
  54         players[device]->setText(players[device]->text() + "<span style='color:"+colorToString(textColor)+"'>"+string+"</span>");
  55 }
  56
  57 bool MultypoWindow::handleX11Event(XEvent *event)
  58 {
  59         Display *dpy = x11Info().display();
  60         /* Handle the first map event: We are finally visible! */
  61         if (!xiInited && event->type == MapNotify) {
  62                 /* XInput Extension available? */
  63                 int eventID, errorID;
  64                 if (!XQueryExtension(dpy, "XInputExtension", &xiOpcode, &eventID, &errorID)) {
  65                    qCritical() << "X Input extension not available";
  66                 }
  67
  68                 /* Which version of XI2? We support 2.0 */
  69                 int major = 2, minor = 0;
  70                 if (XIQueryVersion(dpy, &major, &minor) == BadRequest) {
  71                         qCritical() << "XI2 not available. Server supports" << major << "." <<
  72                                                 minor;
  73                 }
  74
  75                 qDebug() << "System supports XI2";
  76
  77
  78                 // Now let's listen to keypress events
  79                 XIEventMask eventmask;
  80                 unsigned char mask [1] = { 0 }; // will change
  81                 eventmask.deviceid = XIAllMasterDevices;
  82                 eventmask.mask_len = sizeof (mask); // in bytes, for whatever reason...
  83                 eventmask.mask = mask;
  84                 XISetMask(mask, XI_KeyPress);
  85                 XISelectEvents (dpy, winId(), &eventmask, 1);
  86
  87                 // finally, grab all focuses
  88                 int ndevices;
  89                 XIDeviceInfo* devices = XIQueryDevice(dpy, XIAllMasterDevices, &ndevices);
  90                 for (int i = 0; i < ndevices; ++i) {
  91                         if (devices[i].use != XIMasterKeyboard) continue;
  92                         qDebug() << "Found master keyboard with ID" << devices[i].deviceid;
  93                         XISetFocus(dpy, devices[i].deviceid, winId(), CurrentTime);
  94                 }
  95                 XIFreeDeviceInfo(devices);
  96
  97                 xiInited = true;
  98
  99                 return false;
 100         }
 101         else if (xiInited && event->type == GenericEvent
 102                 && event->xcookie.type == GenericEvent && event->xcookie.extension == xiOpcode
 103                 && event->xcookie.evtype == XI_KeyPress && XGetEventData(dpy, &event->xcookie)) {
 104                 /* Handle XI event */
 105                 XIDeviceEvent *d_ev = (XIDeviceEvent*) event->xcookie.data;
 106             KeyCode keycode = d_ev->detail;
 107             int kbdid = d_ev->deviceid;
 108
 109                 if (!(d_ev->flags & XIKeyRepeat)) {
 110                         int keysyms_per_keycode;
 111                         KeySym keysym = XGetKeyboardMapping (dpy, keycode, 1, &keysyms_per_keycode)[0];
 112                         handleKeyPress(kbdid, XKeysymToString(keysym));
 113                 }
 114
 115                 XFreeEventData(dpy, &event->xcookie);
 116
 117                 return true;
 118         }
 119         else {
 120                 return false;
 121         }
 122 }