Function addSignal

Plugins/WebBrowser/Resource/js/QWebChannel.js:248–299

(signalData, isPropertyNotifySignal)

    }

    function addSignal(signalData, isPropertyNotifySignal)
    {
        var signalName = signalData[0];
        var signalIndex = signalData[1];
        object[signalName] = {
            connect: function(callback) {
                if (typeof(callback) !== "function") {
                    console.error("Bad callback given to connect to signal " + signalName);
                    return;
                }

                object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
                object.__objectSignals__[signalIndex].push(callback);

                // only required for "pure" signals, handled separately for properties in propertyUpdate
                if (isPropertyNotifySignal)
                    return;

                // also note that we always get notified about the destroyed signal
                if (signalName === "destroyed" || signalName === "destroyed()" || signalName === "destroyed(QObject*)")
                    return;

                // and otherwise we only need to be connected only once
                if (object.__objectSignals__[signalIndex].length == 1) {
                    webChannel.exec({
                        type: QWebChannelMessageTypes.connectToSignal,
                        object: object.__id__,
                        signal: signalIndex
                    });
                }
            },
            disconnect: function(callback) {
                if (typeof(callback) !== "function") {
                    console.error("Bad callback given to disconnect from signal " + signalName);
                    return;
                }
                // This makes a new list. This is important because it won't interfere with
                // signal processing if a disconnection happens while emittig a signal
                object.__objectSignals__[signalIndex] = (object.__objectSignals__[signalIndex] || []).filter(function(c) {
                  return c != callback;
                });
                if (!isPropertyNotifySignal && object.__objectSignals__[signalIndex].length === 0) {
                    // only required for "pure" signals, handled separately for properties in propertyUpdate
                    webChannel.exec({
                        type: QWebChannelMessageTypes.disconnectFromSignal,
                        object: object.__id__,
                        signal: signalIndex
                    });
                }
            }
        };
    }

    /**
     * Invokes all callbacks for the given signalname. Also works for property notify callbacks.