Example usage for com.google.gwt.event.dom.client HasMouseDownHandlers addMouseDownHandler

Introduction

In this page you can find the example usage for com.google.gwt.event.dom.client HasMouseDownHandlers addMouseDownHandler.

Prototype

HandlerRegistration addMouseDownHandler(MouseDownHandler handler);

Source Link

Document

Adds a MouseDownEvent handler.

Usage

From source file:ch.unifr.pai.mindmap.client.interaction.longclick.LongClick.java

License:Apache License

public LongClick(HasMouseDownHandlers originator, final int longClickThreshold) {
    if (originator != null) {
        this.originator = originator;

        originator.addMouseDownHandler(new MouseDownHandler() {
            @Override//  ww  w. ja  v a2  s. c  o m
            public void onMouseDown(MouseDownEvent event) {
                String deviceId = MultiCursorController.getUUID(event.getNativeEvent());
                if (Element.as(event.getNativeEvent().getEventTarget()) == ((Widget) LongClick.this.originator)
                        .getElement()) {
                    LongClickInfo info = new LongClickInfo(LongClick.this.originator, deviceId,
                            event.getClientX(), event.getClientY());
                    infoByDeviceId.put(MultiCursorController.getUUID(event.getNativeEvent()), info);
                    onStartClick(info);
                }
            }
        });

        ((HasMouseUpHandlers) originator).addMouseUpHandler(new MouseUpHandler() {

            @Override
            public void onMouseUp(MouseUpEvent event) {
                LongClickInfo info = infoByDeviceId.get(MultiCursorController.getUUID(event.getNativeEvent()));
                if (info != null) {
                    if (new Date().getTime() - info.getTime() > longClickThreshold
                            && info.getMouseDownX() == event.getClientX()
                            && info.getMouseDownY() == event.getClientY()) {
                        onLongClick(info);
                        event.preventDefault();
                        event.stopPropagation();
                    }
                }
            }
        });
    }
}

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