Example usage for com.google.gwt.user.client EventPreview EventPreview

Introduction

In this page you can find the example usage for com.google.gwt.user.client EventPreview EventPreview.

Prototype

EventPreview

Source Link

Usage

From source file:org.openxdata.designer.client.CenterPanel.java

/**
 * @see com.google.gwt.user.client.DOM#addEventPreview(EventPreview)
 *//* w ww .j a  va 2 s.c o m*/
private void previewEvents() {

    DOM.addEventPreview(new EventPreview() {
        public boolean onEventPreview(Event event) {
            if (DOM.eventGetType(event) == Event.ONKEYDOWN) {
                byte mode = Context.getCurrentMode();

                if (mode == Context.MODE_DESIGN)
                    return designSurfaceView.handleKeyBoardEvent(event);
                else if (mode == Context.MODE_PREVIEW)
                    return previewView.handleKeyBoardEvent(event);
                else if (mode == Context.MODE_QUESTION_PROPERTIES || mode == Context.MODE_XFORMS_SOURCE)
                    return formDesignerListener.handleKeyBoardEvent(event);
            }

            return true;
        }
    });
}

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From source file:org.openxdata.runner.client.widget.FormRunnerWidget.java

/**
 * @see com.google.gwt.user.client.DOM#addEventPreview(EventPreview)
 *//*from ww w. j a v  a 2s.  c o  m*/
private void previewEvents() {
    DOM.addEventPreview(new EventPreview() {
        public boolean onEventPreview(Event event) {
            if (DOM.eventGetType(event) == Event.ONKEYDOWN)
                return view.handleKeyBoardEvent(event);

            return true;
        }
    });
}

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From source file:pl.balon.gwt.diagramsexample.client.examples.DiagramBuilderExample.java

License:Apache License

protected void createContents() {

    PickupDragController dragController = new PickupDragController(getArea(), true);
    AbsolutePositionDropController dropController = new AbsolutePositionDropController(getArea());

    toolboxDragController = new ToolboxDragController(dropController, dragController);

    toolbox = new HorizontalPanel();
    toolbox.setStyleName("toolbox");
    panel = new AbsolutePanel();
    helpPanel = new HorizontalPanel();
    helpPanel.setStyleName("helpPanel");

    VerticalPanel vp = new VerticalPanel();
    vp.setStyleName("builder");
    vp.add(helpPanel);/*w  ww . j  a va2 s  .c  om*/
    vp.add(toolbox);
    vp.add(panel);
    getArea().add(vp);

    createToolboxNode("A", "all");
    createToolboxNode("L", "left");
    createToolboxNode("R", "right");
    createToolboxNode("T", "top");
    createToolboxNode("B", "bottom");

    createStyleOption("rectilinear", true);
    createStyleOption("bezier", false);
    createStyleOption("straight", false);

    createHelpEntry("drag&drop from toolbar to add");
    createHelpEntry("CTRL+click to select/connect");
    createHelpEntry("DEL to delete selected");

    DOM.addEventPreview(new EventPreview() {
        public boolean onEventPreview(Event event) {

            if (Event.ONKEYDOWN == DOM.eventGetType(event)
                    && KeyboardListener.KEY_DELETE == DOM.eventGetKeyCode(event) && !selected.isEmpty()) {
                for (Iterator i = selected.listIterator(); i.hasNext();) {
                    Widget w = (Widget) i.next();
                    UIObjectConnector.unwrap(w);
                    i.remove();
                    w.removeFromParent();
                }
                return false;
            }

            return true;
        }
    });

}

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