Examples with AlertHandler edu.cmu.cs.hcii.cogtool.util.AlertHandler used on opensource projects

Example 21 with AlertHandler

use of edu.cmu.cs.hcii.cogtool.util.AlertHandler in project cogtool by cogtool.

the class FrameEditorUI method addFrameWidgetHandler.

/**
     * Registers a listener that adjusts selection state in response to
     * widget additions or removals
     */
protected void addFrameWidgetHandler() {
    AlertHandler frameWidgetHandler = new AlertHandler() {

        public void handleAlert(EventObject alert) {
            Frame.WidgetChange chg = (Frame.WidgetChange) alert;
            IWidget chgWidget = chg.getChangeElement();
            if (chg != null) {
                // Check what action was performed
                switch(chg.action) {
                    // Switch the selection to the newly-added widget
                    case Frame.WidgetChange.ELEMENT_ADD:
                        {
                            GraphicalWidget<?> gw = frameUI.getWidgetFigure(chgWidget);
                            gw.addChangeHandler(widgetChangeHandler, Widget.WidgetChange.class);
                            gw.addChangeHandler(widgetChangeHandler, IAttributed.AttributeChange.class);
                            gw.addChangeHandler(widgetChangeHandler, IAttributed.AuthorityChange.class);
                            delayedWidgetSelection.addToSelection(chgWidget, gw);
                            view.requestRename();
                            break;
                        }
                    // Reflect the change in selection state
                    case Frame.WidgetChange.ELEMENT_DELETE:
                        {
                            // Cannot depend on the frameUI to have removed
                            // this widget's graphical version.
                            // Call deselect with the model itself.
                            selection.deselectElement(chgWidget);
                            delayedWidgetSelection.removeFromSelection(chgWidget);
                            // call to clean up any resize handles.
                            delayedRepainting.requestRepaint(REPAINT_SELECT_HANDLES);
                            break;
                        }
                }
            }
        }
    };
    frame.addHandler(this, Frame.WidgetChange.class, frameWidgetHandler);
    AlertHandler frameEltHandler = new AlertHandler() {

        public void handleAlert(EventObject alert) {
            delayedRepainting.requestRepaint(REPAINT_SELECT_HANDLES);
        }
    };
    // Do the above for both widget and association changes!
    frame.addHandler(this, Frame.ElementChange.class, frameEltHandler);
    AlertHandler frameAssocHandler = new AlertHandler() {

        public void handleAlert(EventObject alert) {
            Frame.FrameEltGrpChange chg = (Frame.FrameEltGrpChange) alert;
            if (chg.action == Frame.FrameEltGrpChange.ELEMENT_DELETE) {
                selection.deselectElement(chg.getChangeElement());
            } else if (chg.action == Frame.FrameEltGrpChange.ELEMENT_ADD) {
                selection.setSelectedSelnFig(uiModel.getGroupHalo(chg.getChangeElement()));
            }
        }
    };
    frame.addHandler(this, Frame.FrameEltGrpChange.class, frameAssocHandler);
}