com.extjs.gxt.ui.client.widget.ComponentHelper.java Source code

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Here is the source code for com.extjs.gxt.ui.client.widget.ComponentHelper.java

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/*
 * Sencha GXT 2.3.1 - Sencha for GWT
 * Copyright(c) 2007-2013, Sencha, Inc.
 * licensing@sencha.com
 * 
 * http://www.sencha.com/products/gxt/license/
 */
package com.extjs.gxt.ui.client.widget;

import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.widget.layout.LayoutData;
import com.google.gwt.user.client.ui.Widget;

/**
 * Provides access to package protected methods of component and widget.
 */
public class ComponentHelper {

    public static void doAttach(Widget widget) {
        if (widget != null && !widget.isAttached()) {
            doAttachNative(widget);
        }
    }

    public static void doDetach(Widget widget) {
        if (widget != null && widget.isAttached()) {
            doDetachNative(widget);
        }
    }

    public static LayoutData getLayoutData(Component c) {
        return c.<LayoutData>getData("layoutData");
    }

    @SuppressWarnings("unchecked")
    public static void removeFromParent(Widget widget) {
        Widget parent = widget.getParent();

        if (parent instanceof ContentPanel) {
            ContentPanel cp = (ContentPanel) parent;
            if (cp.getTopComponent() == widget) {
                cp.setTopComponent(null);
                return;
            } else if (cp.getBottomComponent() == widget) {
                cp.setBottomComponent(null);
                return;
            }
        }
        if (parent instanceof Container) {
            ((Container<Component>) parent).remove((Component) widget);
            return;
        }
        if (parent instanceof WidgetComponent) {
            setParent(null, widget);
            return;
        }
        widget.removeFromParent();
    }

    public static void setLayoutData(Component c, LayoutData data) {
        Widget parent = c.getParent();
        c.setData("layoutData", data);
        if (parent != null && parent instanceof Container<?>) {
            ((Container<?>) parent).setLayoutNeeded(true);
        }
    }

    public static void setModel(Component c, ModelData model) {
        c.setModel(model);
    }

    public static native void setParent(Widget parent, Widget child) /*-{
                                                                     child.@com.google.gwt.user.client.ui.Widget::parent = parent;
                                                                     }-*/;

    static native void doAttachNative(Widget widget) /*-{
                                                     widget.@com.google.gwt.user.client.ui.Widget::onAttach()();
                                                     }-*/;

    static native void doDetachNative(Widget widget) /*-{
                                                     widget.@com.google.gwt.user.client.ui.Widget::onDetach()();
                                                     }-*/;
}