com.sencha.gxt.theme.base.client.statusproxy.StatusProxyBaseAppearance.java Source code

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Here is the source code for com.sencha.gxt.theme.base.client.statusproxy.StatusProxyBaseAppearance.java

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/**
 * Sencha GXT 4.0.0 - Sencha for GWT
 * Copyright (c) 2006-2015, Sencha Inc.
 *
 * licensing@sencha.com
 * http://www.sencha.com/products/gxt/license/
 *
 * ================================================================================
 * Open Source License
 * ================================================================================
 * This version of Sencha GXT is licensed under the terms of the Open Source GPL v3
 * license. You may use this license only if you are prepared to distribute and
 * share the source code of your application under the GPL v3 license:
 * http://www.gnu.org/licenses/gpl.html
 *
 * If you are NOT prepared to distribute and share the source code of your
 * application under the GPL v3 license, other commercial and oem licenses
 * are available for an alternate download of Sencha GXT.
 *
 * Please see the Sencha GXT Licensing page at:
 * http://www.sencha.com/products/gxt/license/
 *
 * For clarification or additional options, please contact:
 * licensing@sencha.com
 * ================================================================================
 *
 *
 * ================================================================================
 * Disclaimer
 * ================================================================================
 * THIS SOFTWARE IS DISTRIBUTED "AS-IS" WITHOUT ANY WARRANTIES, CONDITIONS AND
 * REPRESENTATIONS WHETHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE
 * IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, MERCHANTABLE QUALITY,
 * FITNESS FOR A PARTICULAR PURPOSE, DURABILITY, NON-INFRINGEMENT, PERFORMANCE AND
 * THOSE ARISING BY STATUTE OR FROM CUSTOM OR USAGE OF TRADE OR COURSE OF DEALING.
 * ================================================================================
 */
package com.sencha.gxt.theme.base.client.statusproxy;

import com.google.gwt.dom.client.Element;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.sencha.gxt.core.client.XTemplates;
import com.sencha.gxt.core.client.dom.XElement;
import com.sencha.gxt.core.client.resources.StyleInjectorHelper;
import com.sencha.gxt.dnd.core.client.StatusProxy.StatusProxyAppearance;

public abstract class StatusProxyBaseAppearance implements StatusProxyAppearance {

    public interface StatusProxyResources {

        ImageResource dropAllowed();

        ImageResource dropNotAllowed();

        StatusProxyStyle style();

    }

    public interface StatusProxyStyle extends CssResource {

        String dragGhost();

        String dropAllowed();

        String dropDisallowed();

        String dropIcon();

        String proxy();

    }

    public interface StatusProxyTemplates extends XTemplates {

        @XTemplate("<div class=\"{style.proxy}\"><div class=\"{style.dropIcon}\"></div><div class=\"{style.dragGhost}\"></div></div>")
        SafeHtml template(StatusProxyBaseAppearance.StatusProxyStyle style);

    }

    private final StatusProxyTemplates templates;
    private final StatusProxyResources resources;
    private final StatusProxyStyle style;

    public StatusProxyBaseAppearance(StatusProxyBaseAppearance.StatusProxyResources resources,
            StatusProxyBaseAppearance.StatusProxyTemplates templates) {
        this.resources = resources;
        style = resources.style();
        this.templates = templates;

        StyleInjectorHelper.ensureInjected(style, true);
    }

    @Override
    public void render(SafeHtmlBuilder builder) {
        builder.append(templates.template(style));
    }

    @Override
    public void setStatus(Element parent, boolean allowed) {
        if (allowed) {
            setStatus(parent, resources.dropAllowed());
        } else {
            setStatus(parent, resources.dropNotAllowed());
        }
    }

    @Override
    public void setStatus(Element parent, ImageResource icon) {
        XElement wrap = iconWrap(parent);
        wrap.setInnerSafeHtml(SafeHtmlUtils.EMPTY_SAFE_HTML);
        if (icon != null) {
            wrap.appendChild(getImage(icon));
        }
    }

    @Override
    public void update(Element parent, SafeHtml html) {
        getDragGhost(parent).setInnerSafeHtml(html);
    }

    protected XElement iconWrap(Element parent) {
        return parent.getFirstChildElement().cast();
    }

    private Element getDragGhost(Element parent) {
        return XElement.as(parent).select("." + style.dragGhost()).getItem(0);
    }

    private Element getImage(ImageResource ir) {
        return AbstractImagePrototype.create(ir).createElement();
    }

}