/*
* 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 org.apache.isis.viewer.wicket.ui.components.widgets.buttons;
import java.io.Serializable;
import org.apache.wicket.Component;
import org.apache.isis.viewer.wicket.model.models.EntityModel;
import org.apache.isis.viewer.wicket.ui.panels.PanelAbstract;
/**
* Abstraction of show/hide, ie two buttons only one of which is visible.
*/
public class ToggleButtonsPanel extends PanelAbstract<EntityModel> {
private static final long serialVersionUID = 1L;
private static final String ID_BUTTON_1 = "button1";
private static final String ID_BUTTON_2 = "button2";
private boolean flag;
private Toggler toggler;
private ContainedButtonPanel button1;
private ContainedButtonPanel button2;
public ToggleButtonsPanel(final String id, final String button1Caption, final String button2Caption) {
super(id, null);
this.flag = false;
buildGui(button1Caption, button2Caption);
onInit();
}
private void buildGui(final String button1Caption, final String button2Caption) {
button1 = new ContainedButtonPanel(ID_BUTTON_1, button1Caption) {
private static final long serialVersionUID = 1L;
@Override
public void onSubmit() {
toggler.toggle();
}
};
addOrReplace(button1);
button2 = new ContainedButtonPanel(ID_BUTTON_2, button2Caption) {
private static final long serialVersionUID = 1L;
@Override
public void onSubmit() {
toggler.toggle();
}
};
toggler = new Toggler(button1, button2);
addOrReplace(button2);
}
public void addComponentToRerender(final Component... components) {
for (final Component component : components) {
button1.addComponentToRerender(component);
button2.addComponentToRerender(component);
}
}
/**
* Hook method to override.
*/
protected void onInit() {
}
/**
* Hook method to override.
*/
protected void onButton1() {
}
/**
* Hook method to override.
*/
protected void onButton2() {
}
/**
* For subclasses to use.
*/
protected final void hideButton1() {
flag = true;
toggler.syncButtonVisibility();
}
/**
* For subclasses to use.
*/
protected final void hideButton2() {
flag = false;
toggler.syncButtonVisibility();
}
private class Toggler implements Serializable {
private static final long serialVersionUID = 1L;
private final Component component1;
private final Component component2;
public Toggler(final Component component1, final Component component2) {
this.component1 = component1;
this.component2 = component2;
syncButtonVisibility();
}
public void toggle() {
fireHooks();
syncButtonVisibility();
}
private void fireHooks() {
flag = !flag;
if (flag) {
onButton1();
} else {
onButton2();
}
}
private void syncButtonVisibility() {
component1.setVisible(!flag);
component2.setVisible(flag);
}
}
}