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GWT Bibliothek fuer Mobile Plattformen der SWM
/*
* Copyright 2011 SWM Services GmbH.
*
* 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 de.swm.commons.mobile.client.widgets.command;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.uibinder.client.UiConstructor;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import de.swm.commons.mobile.client.SWMMobile;
import de.swm.commons.mobile.client.event.DragController;
import de.swm.commons.mobile.client.event.DragEvent;
import de.swm.commons.mobile.client.event.DragEventsHandler;
import de.swm.commons.mobile.client.utils.IsSWMMobileWidgetHelper;
import de.swm.commons.mobile.client.widgets.itf.IsSWMMobileWidget;
import de.swm.gwt.client.utils.ShimClickHandler;
/**
* Defines a command bar containing command widgets (CommandItems).
*
*
*
*
*
*/
public class CommandItem extends FlowPanel implements DragEventsHandler,
IsSWMMobileWidget {
private boolean isDisabled = false;
private boolean isSelected = false;
private final IsSWMMobileWidgetHelper widgetHelper = new IsSWMMobileWidgetHelper();
protected Image icon;
protected ImageResource normalIcon;
protected ImageResource highlightIcon;
protected Label headerText;
private final ShimClickHandler clickHandler = new ShimClickHandler();
/**
* Allow subclasses to use different constructors
*/
protected CommandItem() {
}
/**
* Constructor.
*
* @param headerText .
* @param normalIcon .
* @param highlightIcon .
*/
@UiConstructor
public CommandItem(String headerText, ImageResource normalIcon,
ImageResource highlightIcon) {
this(headerText, normalIcon, highlightIcon, null);
}
/**
* Constructor.
*
* @param headerText .
* @param normalIcon .
* @param handler .
*/
public CommandItem(String headerText, ImageResource normalIcon,
ClickHandler handler) {
this(headerText, normalIcon, null, handler);
}
/**
* Constructor.
*
* @param normalIcon .
* @param handler .
*/
public CommandItem(ImageResource normalIcon, ClickHandler handler) {
this(null, normalIcon, null, handler);
}
/**
* Constructor.
*
* @param normalIcon .
* @param highlightIcon .
* @param handler .
*/
public CommandItem(ImageResource normalIcon, ImageResource highlightIcon,
ClickHandler handler) {
this(null, normalIcon, highlightIcon, handler);
}
/**
* Constructor.
*
* @param headerText .
* @param normalIcon .
* @param highlightIcon .
* @param handler .
*/
public CommandItem(String headerText, ImageResource normalIcon,
final ImageResource highlightIcon, final ClickHandler handler) {
assert normalIcon != null : "Normal icon must be set for CommandItem";
this.normalIcon = normalIcon;
this.icon = new Image(normalIcon);
add(this.icon);
this.highlightIcon = highlightIcon;
if (headerText != null) {
this.headerText = new Label(headerText);
add(this.headerText);
}
if (handler != null) {
clickHandler.addClickHandler(handler);
}
addDomHandler(clickHandler, ClickEvent.getType());
}
/**
* Add a click handler to the command panel.
*
* @param handler the click handler.
*/
public void addClickHandler(ClickHandler handler) {
clickHandler.addClickHandler(handler);
}
public void setNormalIcon(ImageResource normalIcon) {
this.normalIcon = normalIcon;
}
public void setHighlightIcon(ImageResource highlightIcon) {
this.highlightIcon = highlightIcon;
}
/**
* Sets the header text.
*
* @param headerText the header text
*/
public void setHeaderText(String headerText) {
if (this.headerText == null) {
this.headerText = new Label();
add(this.headerText);
}
this.headerText.setText(headerText);
}
@Override
public void onLoad() {
super.onLoad();
DragController.get().addDragEventsHandler(this);
widgetHelper.checkInitialLoad(this);
}
@Override
public void onUnload() {
DragController.get().removeDragEventsHandler(this);
}
@Override
public void onDragStart(DragEvent e) {
if (!isDisabled) {
if (!isSelected) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().pressed());
}
highlightIcon();
}
e.stopPropagation();
}
protected void highlightIcon() {
if ((highlightIcon != null) && (icon != null)) {
icon.setResource(highlightIcon);
}
}
protected void unhighlightIcon() {
if (icon != null) {
icon.setResource(normalIcon);
}
}
/**
* Selects permanetly the item.
*
* @param selected true is command item schould be selected
*/
public void setSelected(boolean selected) {
if (!this.isSelected && selected) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().pressed());
} else if (this.isSelected && !selected) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().pressed());
}
this.isSelected = selected;
}
/**
* Returns the isSelected.
*
* @return the isSelected
*/
public boolean isSelected() {
return isSelected;
}
@Override
public void onDragMove(DragEvent e) {
if (!isDisabled) {
if (!isSelected) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().pressed());
}
unhighlightIcon();
}
e.stopPropagation();
}
@Override
public void onDragEnd(DragEvent e) {
if (!isDisabled) {
if (!isSelected) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().pressed());
}
unhighlightIcon();
} else {
DragController.get().suppressNextClick();
}
e.stopPropagation();
}
/**
* Disables / Enables this item.
*
* @param disabled true if disabled
*/
public void setDisabled(boolean disabled) {
isDisabled = disabled;
this.clickHandler.setEnabled(!disabled);
if (disabled) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().disabled());
} else {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle()
.getCommandPanelCss().disabled());
}
}
/**
* Retunrs true if disabled.
* @return true if disabled
*/
public boolean isDisabled() {
return isDisabled;
}
@Override
public void onInitialLoad() {
}
@Override
public void onTransitionEnd() {
}
@Override
public void setSecondaryStyle(String style) {
widgetHelper.setSecondaryStyle(this, style);
}
/**
* Tauscht während der Laufzeit das Icon aus (wenn sich ein Item beispielsweise deaktiviert).
*
* @param resource .
*/
public void setImageOnIcon(ImageResource resource) {
if (icon != null) {
this.icon.setResource(resource);
}
}
}