Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.googlecode.wicket.jquery.ui.interaction.resizable; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.attributes.CallbackParameter; import com.googlecode.wicket.jquery.core.JQueryBehavior; import com.googlecode.wicket.jquery.core.JQueryEvent; import com.googlecode.wicket.jquery.core.Options; import com.googlecode.wicket.jquery.core.ajax.IJQueryAjaxAware; import com.googlecode.wicket.jquery.core.ajax.JQueryAjaxBehavior; import com.googlecode.wicket.jquery.core.utils.RequestCycleUtils; /** * Provides a jQuery resizable behavior * * @author Sebastien Briquet - sebfz1 */ public abstract class ResizableBehavior extends JQueryBehavior implements IJQueryAjaxAware, IResizableListener { private static final long serialVersionUID = 1L; private static final String METHOD = "resizable"; private JQueryAjaxBehavior onResizeStartBehavior = null; private JQueryAjaxBehavior onResizeStopBehavior = null; /** * Constructor * @param selector the html selector (ie: "#myId") */ public ResizableBehavior(String selector) { this(selector, new Options()); } /** * Constructor * @param selector the html selector (ie: "#myId") * @param options the {@link Options} */ public ResizableBehavior(String selector, Options options) { super(selector, METHOD, options); } // Methods // @Override public void bind(Component component) { super.bind(component); // these events are not enabled by default to prevent unnecessary server round-trips. if (this.isResizeStartEventEnabled()) { component.add(this.onResizeStartBehavior = this.newOnResizeStartBehavior()); } if (this.isResizeStopEventEnabled()) { component.add(this.onResizeStopBehavior = this.newOnResizeStopBehavior()); } } // Events // @Override public void onConfigure(Component component) { super.onConfigure(component); if (this.onResizeStartBehavior != null) { this.setOption("start", this.onResizeStartBehavior.getCallbackFunction()); } if (this.onResizeStopBehavior != null) { this.setOption("stop", this.onResizeStopBehavior.getCallbackFunction()); } } @Override public void onAjax(AjaxRequestTarget target, JQueryEvent event) { if (event instanceof ResizeEvent) { ResizeEvent ev = (ResizeEvent) event; if (ev instanceof ResizeStartEvent) { this.onResizeStart(target, ev.getTop(), ev.getLeft(), ev.getWidth(), ev.getHeight()); } if (ev instanceof ResizeStopEvent) { this.onResizeStop(target, ev.getTop(), ev.getLeft(), ev.getWidth(), ev.getHeight()); } } } // Factories // /** * Gets a new {@link JQueryAjaxBehavior} that will be called on 'start' javascript event * @return the {@link JQueryAjaxBehavior} */ protected JQueryAjaxBehavior newOnResizeStartBehavior() { return new JQueryAjaxBehavior(this) { private static final long serialVersionUID = 1L; @Override protected CallbackParameter[] getCallbackParameters() { return new CallbackParameter[] { CallbackParameter.context("event"), CallbackParameter.context("ui"), CallbackParameter.resolved("top", "ui.position.top"), CallbackParameter.resolved("left", "ui.position.left"), CallbackParameter.resolved("width", "ui.size.width"), CallbackParameter.resolved("height", "ui.size.height"), }; } @Override protected JQueryEvent newEvent() { return new ResizeStartEvent(); } }; } /** * Gets a new {@link JQueryAjaxBehavior} that will be called on 'stop' javascript event * @return the {@link JQueryAjaxBehavior} */ protected JQueryAjaxBehavior newOnResizeStopBehavior() { return new JQueryAjaxBehavior(this) { private static final long serialVersionUID = 1L; @Override protected CallbackParameter[] getCallbackParameters() { return new CallbackParameter[] { CallbackParameter.context("event"), CallbackParameter.context("ui"), CallbackParameter.resolved("top", "ui.position.top"), CallbackParameter.resolved("left", "ui.position.left"), CallbackParameter.resolved("width", "ui.size.width"), CallbackParameter.resolved("height", "ui.size.height"), }; } @Override protected JQueryEvent newEvent() { return new ResizeStopEvent(); } }; } // Event Objects // /** * Provides a base class for resize event object */ protected static class ResizeEvent extends JQueryEvent { private final int top; private final int left; private final int width; private final int height; /** * Constructor. */ public ResizeEvent() { this.top = RequestCycleUtils.getQueryParameterValue("top").toInt(-1); this.left = RequestCycleUtils.getQueryParameterValue("left").toInt(-1); this.width = RequestCycleUtils.getQueryParameterValue("width").toInt(-1); this.height = RequestCycleUtils.getQueryParameterValue("height").toInt(-1); } /** * Gets the position's top value * @return the position's top value */ public int getTop() { return this.top; } /** * Gets the position's left value * @return the position's left value */ public int getLeft() { return this.left; } /** * Gets the size's width value * @return the size's width value */ public int getWidth() { return this.width; } /** * Gets the size's height value * @return the size's height value */ public int getHeight() { return this.height; } } /** * Provides an event object that will be broadcasted by the {@link JQueryAjaxBehavior} 'start' callback */ protected static class ResizeStartEvent extends ResizeEvent { } /** * Provides an event object that will be broadcasted by the {@link JQueryAjaxBehavior} 'stop' callback */ protected static class ResizeStopEvent extends ResizeEvent { } }