Java tutorial
/* * Copyright 2008-2014 Hippo B.V. (http://www.onehippo.com) * * Licensed 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 org.hippoecm.frontend.dialog; import java.util.Map; import org.apache.wicket.Component; import org.apache.wicket.ajax.AjaxEventBehavior; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.attributes.AjaxCallListener; import org.apache.wicket.ajax.attributes.AjaxRequestAttributes; import org.apache.wicket.ajax.markup.html.form.AjaxButton; import org.apache.wicket.behavior.Behavior; import org.apache.wicket.markup.ComponentTag; import org.apache.wicket.markup.html.form.Button; import org.apache.wicket.markup.html.form.Form; import org.apache.wicket.markup.parser.XmlTag; import org.apache.wicket.model.IModel; import org.apache.wicket.request.cycle.RequestCycle; import org.apache.wicket.util.io.IClusterable; import org.apache.wicket.util.string.Strings; import org.hippoecm.frontend.util.WebApplicationHelper; import wicket.contrib.input.events.EventType; import wicket.contrib.input.events.InputBehavior; import wicket.contrib.input.events.key.KeyType; public class ButtonWrapper implements IClusterable { private static final long serialVersionUID = 1L; private Button button; private boolean ajax; private IModel<String> label; private boolean visible; private boolean enabled; private KeyType keyType; private boolean hasChanges = false; public ButtonWrapper(Button button) { this.button = button; visible = button.isVisible(); enabled = button.isEnabled(); label = button.getModel(); if (button instanceof AjaxButton) { ajax = true; } } public ButtonWrapper(IModel<String> label) { this(label, true); } public ButtonWrapper(IModel<String> label, boolean ajax) { this.ajax = ajax; this.label = label; this.visible = true; this.enabled = true; } private Button createButton() { if (ajax) { AjaxButton button = new AjaxButton(DialogConstants.BUTTON) { private static final long serialVersionUID = 1L; @Override protected void onSubmit(AjaxRequestTarget target, Form<?> form) { ButtonWrapper.this.onSubmit(); } @Override public boolean isVisible() { return visible; } @Override public boolean isEnabled() { return enabled; } @Override protected void updateAjaxAttributes(final AjaxRequestAttributes attributes) { super.updateAjaxAttributes(attributes); attributes.getAjaxCallListeners().add(new AjaxCallListener() { @Override public CharSequence getBeforeHandler(final Component component) { return "$('#" + getMarkupId() + "').prop('disabled', true);"; } @Override public CharSequence getCompleteHandler(final Component component) { return "$('#" + getMarkupId() + "').prop('disabled', false);"; } }); ButtonWrapper.this.onUpdateAjaxAttributes(attributes); } }; button.setModel(label); return button; } else { Button button = new Button(DialogConstants.BUTTON) { private static final long serialVersionUID = 1L; @Override public void onSubmit() { ButtonWrapper.this.onSubmit(); } @Override public boolean isVisible() { return visible; } @Override public boolean isEnabled() { return enabled; } }; button.setModel(label); return button; } } protected void onUpdateAjaxAttributes(final AjaxRequestAttributes attributes) { } public Button getButton() { if (button == null) { button = decorate(createButton()); } return button; } protected Button decorate(Button button) { button.setEnabled(enabled); button.setVisible(visible); if (getKeyType() != null) { button.add(new InputBehavior(new KeyType[] { getKeyType() }, EventType.click) { @Override protected Boolean getDisable_in_input() { return !getKeyType().equals(KeyType.Escape); } @Override public void onRemove(final Component component) { super.onRemove(component); AjaxRequestTarget target = RequestCycle.get().find(AjaxRequestTarget.class); if (target != null) { target.appendJavaScript("if (window['shortcut']) { shortcut.remove('" + getKeyType().getKeyCode() + "'); }"); } } }); } return button; } public void setEnabled(boolean isset) { enabled = isset; if (button != null && WebApplicationHelper.isPartOfPage(button)) { button.setEnabled(isset); if (ajax) { AjaxRequestTarget target = RequestCycle.get().find(AjaxRequestTarget.class); if (target != null) { if (!isset) { renderAttribute(target, "disabled", "disabled"); } else { target.appendJavaScript( "Wicket.$('" + button.getMarkupId() + "').removeAttribute('disabled')"); for (Behavior behavior : button.getBehaviors()) { ComponentTag tag = new ComponentTag("button", XmlTag.TagType.OPEN_CLOSE); behavior.onComponentTag(button, tag); behavior.renderHead(button, target.getHeaderResponse()); for (Map.Entry<String, Object> entry : tag.getAttributes().entrySet()) { renderAttribute(target, entry.getKey(), entry.getValue()); } } } } } } } /** * Reverse the encoding that was done by {@link AjaxEventBehavior#onComponentTag} method. * That is needed for rendering to html, but is not usable in an ajax response. * * @param target * @param key * @param value */ private void renderAttribute(final AjaxRequestTarget target, String key, Object value) { if (value != null) { value = Strings.replaceAll(value.toString(), " ", " "); value = Strings.replaceAll(value.toString(), "&", "&"); value = Strings.replaceAll(value.toString(), ">", ">"); value = Strings.replaceAll(value.toString(), "<", "<"); value = Strings.replaceAll(value.toString(), """, "\\\""); } target.appendJavaScript( "Wicket.$('" + button.getMarkupId() + "').setAttribute('" + key + "', \"" + value + "\")"); } public void setVisible(boolean isset) { visible = isset; if (button != null && button.isVisible() != isset) { button.setVisible(isset); if (ajax) { AjaxRequestTarget target = RequestCycle.get().find(AjaxRequestTarget.class); if (target != null) { target.add(button); } } } } public void setAjax(boolean c) { ajax = c; } public void setLabel(IModel<String> label) { this.label = label; if (button != null) { button.setModel(label); } hasChanges = true; } public void setKeyType(KeyType keyType) { this.keyType = keyType; } protected void onSubmit() { } public boolean hasChanges() { if (!ajax) { return false; } if (button == null) { return true; } if (visible != button.isVisible()) { return true; } if (enabled != button.isEnabled()) { return true; } return hasChanges; } public void rendered() { hasChanges = false; } protected KeyType getKeyType() { return keyType; } }