/*
* Copyright (C) 2010 deNormans
* http://www.denormans.com/
* All rights reserved.
*
* This software is the confidential and proprietary information of deNormans ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use it only in accordance with the terms of the license
* agreement you entered into with deNormans.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* DENORMANS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.denormans.facebookgwt.samples.client.showcase.widgets;
import com.denormans.facebookgwt.api.shared.auth.FBPermission;
import com.denormans.facebookgwt.api.shared.auth.FBPermissions;
import com.denormans.facebookgwt.gwtutil.shared.events.ValueRemoveEvent;
import com.denormans.facebookgwt.gwtutil.shared.events.ValueRemoveHandler;
import com.google.gwt.core.client.GWT;
import com.google.gwt.editor.client.LeafValueEditor;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.HasEnabled;
import com.google.gwt.user.client.ui.HasValue;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.ScrollPanel;
import java.util.ArrayList;
import java.util.List;
public class FBPermissionListEditor extends Composite implements LeafValueEditor<List<FBPermission>>, HasValue<List<FBPermission>>, HasEnabled {
interface PermissionsWidgetUIBinder extends UiBinder<HTMLPanel, FBPermissionListEditor> {}
private static PermissionsWidgetUIBinder sUIBinder = GWT.create(PermissionsWidgetUIBinder.class);
@UiField ListBox permissionsListBox;
@UiField Button addAllPermissionsButton;
@UiField ScrollPanel permissionWidgets;
@UiField FlowPanel permissionWidgetsPanel;
private List<FBPermission> permissions;
private ValueRemoveHandler<FBPermission> permissionRemoveHandler;
public FBPermissionListEditor() {
HTMLPanel rootElement = sUIBinder.createAndBindUi(this);
initWidget(rootElement);
permissionsListBox.addItem("Select a permission to add...", "");
for (final FBPermissions permission : FBPermissions.values()) {
if (permission.isRequestable()) {
permissionsListBox.addItem(permission.name(), permission.getApiValue());
}
}
permissionsListBox.setSelectedIndex(0);
permissionRemoveHandler = new ValueRemoveHandler<FBPermission>() {
@Override
public void onValueRemove(final ValueRemoveEvent<FBPermission> permissionValueRemoveEvent) {
removePermission((PermissionWidget) permissionValueRemoveEvent.getSource());
}
};
}
@Override
public List<FBPermission> getValue() {
return permissions;
}
@Override
public void setValue(final List<FBPermission> value) {
setValue(value, false);
}
@Override
public void setValue(final List<FBPermission> value, final boolean fireEvents) {
if (fireEvents) {
ValueChangeEvent.fireIfNotEqual(this, permissions, value);
}
if (value != null) {
permissions = new ArrayList<FBPermission>(value);
} else {
permissions = null;
}
updatePermissions();
}
@Override
public boolean isEnabled() {
return permissionsListBox.isEnabled();
}
@Override
public void setEnabled(final boolean enabled) {
permissionsListBox.setEnabled(enabled);
addAllPermissionsButton.setEnabled(enabled);
}
private void updatePermissions() {
permissionWidgetsPanel.clear();
if (permissions == null || permissions.isEmpty()) {
return;
}
permissionWidgetsPanel.clear();
for (final FBPermission permission : permissions) {
addPermissionWidget(permission);
}
resizePermissionWidgets();
}
private void addPermissionWidget(final FBPermission permission) {
PermissionWidget permissionWidget = new PermissionWidget();
permissionWidget.setValue(permission);
permissionWidget.addValueRemoveHandler(permissionRemoveHandler);
permissionWidgetsPanel.add(permissionWidget);
}
private void addPermission(final FBPermission permission) {
if (!permission.isRequestable()) {
return;
}
if (permissions == null) {
permissions = new ArrayList<FBPermission>();
}
if (!permissions.contains(permission)) {
permissions.add(permission);
}
ValueChangeEvent.fire(this, permissions);
addPermissionWidget(permission);
resizePermissionWidgets();
}
private void removePermission(final PermissionWidget permissionWidget) {
permissions.remove(permissionWidget.getValue());
ValueChangeEvent.fire(this, permissions);
permissionWidgetsPanel.remove(permissionWidget);
resizePermissionWidgets();
}
private void resizePermissionWidgets() {
int numWidgetsToShow = Math.min(permissionWidgetsPanel.getWidgetCount(), 5);
if (numWidgetsToShow > 0) {
permissionWidgets.setHeight((numWidgetsToShow * 39 - 1) + "px");
permissionWidgets.scrollToBottom();
}
permissionWidgets.setVisible(numWidgetsToShow > 0);
}
@UiHandler ("permissionsListBox")
public void handleEventTypesListBoxChange(final ChangeEvent event) {
FBPermission fbPermission = getSelectedPermission();
if (fbPermission == null) {
return;
}
addPermission(fbPermission);
permissionsListBox.setSelectedIndex(0);
}
@UiHandler ("addAllPermissionsButton")
public void handleAddAllPermissionsButtonClick(final ClickEvent event) {
for (FBPermissions permission : FBPermissions.values()) {
addPermission(permission);
}
}
private FBPermission getSelectedPermission() {
FBPermission fbPermission = null;
String permissionApiValue = permissionsListBox.getValue(permissionsListBox.getSelectedIndex());
if (permissionApiValue.length() > 0) {
fbPermission = FBPermissions.valueFromApiValue(permissionApiValue);
}
return fbPermission;
}
@Override
public HandlerRegistration addValueChangeHandler(final ValueChangeHandler<List<FBPermission>> listValueChangeHandler) {
return addHandler(listValueChangeHandler, ValueChangeEvent.getType());
}
}