selectionAllowed

gistfile1.txt

// function that will tell the browser if you can "select" the field or not ... returns false most of the time
skShell.textEditing = mxUtils.bind(this, function (evt) { // this binds this to the current element... not sure you actually need that

            evt = evt || window.event;

            // tells if the evt target has the class "selectionAllowed"
            if (this.isSelectionAllowed(evt)) {
                return true; // normal behaviour (selection, context menu...)
            }

            // other cases to deal with... (dialog)
            return skShell.graph.isEditing() || this.dialog != null || skShell.menu.dialog != null;

        });
    
    
    // each time the user selects or click, we check if something needs to happen or not
    document.onselectstart = skShell.textEditing;
    document.onmousedown = skShell.textEditing;
    // And uses built-in context menu while editing
    if (mxClient.IS_IE && document.documentMode != 9) {
        mxEvent.addListener(this.container, 'contextmenu', skShell.textEditing);
    }
    else {
        document.oncontextmenu = skShell.textEditing;
    }

    
    // selection allowed
    this.isSelectionAllowed = function (evt) {
        return !!(evt && $(evt.toElement || evt.relatedTarget).hasClass("selectionAllowed"));
    };