package org.jboss.as.console.client.widgets.popups;
/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
import com.google.gwt.cell.client.TextCell;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.HasValueChangeHandlers;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.safehtml.client.SafeHtmlTemplates;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.cellview.client.CellList;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.gwt.view.client.SingleSelectionModel;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* @author Heiko Braun
* @date 2/24/11
*/
public class ComboPicker implements HasValueChangeHandlers<String> {
private static final int ESCAPE = 27;
private List<String> values = new ArrayList<String>();
private int numCharsClip = 20;
interface Template extends SafeHtmlTemplates {
@Template("<div class=\"{0}\">{1}</div>")
SafeHtml item(String cssClass, String title);
}
private static final Template TEMPLATE = GWT.create(Template.class);
private PopupPanel popup;
private CellList<String> cellList;
private HorizontalPanel header;
private Display displayed;
private boolean isEnabled = true;
private List<ValueChangeHandler<String>> changeHandlers = new ArrayList<ValueChangeHandler<String>>();
class Display extends HTML {
private String actual;
Display(String html) {
super(html);
setStyleName("table-picker-value");
}
public String getActual() {
return actual;
}
public void setActual(String actual) {
this.actual = actual;
}
}
public ComboPicker(String cssSuffix) {
cellList = new CellList<String>(new TextCell()
{
@Override
public void render(Context context, String data, SafeHtmlBuilder sb) {
String cssName = (context.getIndex() %2 > 0) ? "combobox-item combobox-item-odd" : "combobox-item";
if(data.equals(displayed.getActual()))
cssName+=" combobox-item-selected";
sb.append(TEMPLATE.item(cssName, data));
}
});
cellList.setPageSize(100);
final SingleSelectionModel<String> selectionModel = new SingleSelectionModel<String>();
cellList.setSelectionModel(selectionModel);
selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
public void onSelectionChange(SelectionChangeEvent event) {
String selectedValue = selectionModel.getSelectedObject();
setDisplayedValue(selectedValue);
popup.hide();
onSelection(selectedValue);
}
});
final String panelId = "popup_"+ HTMLPanel.createUniqueId();
popup = new PopupPanel(true, true) {
@Override
protected void onPreviewNativeEvent(Event.NativePreviewEvent event) {
if (Event.ONKEYUP == event.getTypeInt()) {
if (event.getNativeEvent().getKeyCode() == ESCAPE) {
// Dismiss when escape is pressed
popup.hide();
}
}
}
public void onBrowserEvent(Event event) {
super.onBrowserEvent(event);
}
};
popup.getElement().setId(panelId);
popup.setStyleName("default-popup");
popup.addStyleName("triangle-border");
popup.addStyleName("top-left");
popup.setWidget(new ScrollPanel(cellList));
displayed = new Display("");
header = new HorizontalPanel();
header.setStyleName("combobox"+cssSuffix);
header.add(displayed);
HTML icon = new HTML("<span style='font-size:12px;cursor:pointer'><i class='icon-chevron-down'></i></span>");
header.add(icon);
displayed.getElement().getParentElement().setAttribute("width", "100%");
icon.getParent().getElement().setAttribute("width", "18");
//header.getElement().setAttribute("width", "95%");
header.getElement().setAttribute("cellspacing", "0");
header.getElement().setAttribute("cellpadding", "0");
header.getElement().setAttribute("border", "0");
ClickHandler clickHandler = new ClickHandler() {
@Override
public void onClick(ClickEvent clickEvent) {
openPanel();
}
};
displayed.addClickHandler(clickHandler);
icon.addClickHandler(clickHandler);
}
public ComboPicker() {
this("");
}
public void setClipping(int clipAt) {
numCharsClip = clipAt;
}
public String getSelectedValue() {
return displayed.getActual();
}
private void onSelection(String selectedValue) {
ValueChangeEvent.fire(this, selectedValue);
}
public Widget asWidget() {
return header;
}
private void openPanel() {
if(isEnabled)
{
popup.setWidth((header.getOffsetWidth()+60)+"px");
int height = Math.min(cellList.getRowCount() * 36, 400);
popup.setHeight(height + "px");
popup.setPopupPosition(
header.getAbsoluteLeft(),
header.getAbsoluteTop()+39
);
popup.show();
}
}
public int getItemCount() {
return cellList.getRowCount();
}
public String getValue(int i) {
return values.get(i);
}
public void setItemSelected(int i, boolean isSelected, boolean fireChange) {
String selection = "";
if(isSelected && !values.isEmpty())
{
selection = values.get(i);
setDisplayedValue(selection);
if(fireChange) onSelection(selection);
}
else if(!isSelected)
{
setDisplayedValue(selection);
if(fireChange) onSelection(selection);
}
cellList.getSelectionModel().setSelected(selection, isSelected);
}
public void setItemSelected(int i, boolean isSelected) {
setItemSelected(i, isSelected, true);
}
private void setDisplayedValue(String display)
{
displayed.setActual(display);
displayed.setText(clip(display, numCharsClip));
}
private static String clip(String value, int clipping)
{
String result = value;
if(value!=null && value.length()>clipping)
result = value.substring(0, clipping)+"...";
return result;
}
public void setValues(Collection<String> values)
{
clearSelection();
clearValues();
this.values.addAll(values);
refeshCellList();
}
private void refeshCellList() {
cellList.setRowCount(this.values.size(), true);
cellList.setRowData(0, this.values);
}
public void clearValues() {
this.values.clear();
clearSelection();
refeshCellList();
}
public void addItem(String s) {
this.values.add(s);
refeshCellList();
}
@Override
public HandlerRegistration addValueChangeHandler(final ValueChangeHandler<String> handler) {
changeHandlers.add(handler);
return new HandlerRegistration() {
@Override
public void removeHandler() {
changeHandlers.remove(handler);
}
};
}
@Override
public void fireEvent(GwtEvent<?> gwtEvent) {
for(ValueChangeHandler<String> handler : changeHandlers)
handler.onValueChange((ValueChangeEvent<String>)gwtEvent);
}
public void setEnabled(boolean b) {
this.isEnabled = b;
if(isEnabled)
{
displayed.removeStyleName("combobox-value-disabled");
}
else
{
displayed.addStyleName("combobox-value-disabled");
}
}
public void clearSelection() {
setDisplayedValue("");
for(int i=0; i< getItemCount(); i++)
{
setItemSelected(i, false);
}
}
}