package org.ovirt.engine.ui.webadmin.widget.table.cell;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.ovirt.engine.ui.common.widget.table.cell.AbstractInputCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.BrowserEvents;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.dom.client.SelectElement;
import com.google.gwt.safehtml.client.SafeHtmlTemplates;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
/**
* A cell used to render a drop-down list.
*/
public class CustomSelectionCell extends AbstractInputCell<String, String> {
interface CellTemplate extends SafeHtmlTemplates {
@Template("<option value=\"{0}\">{0}</option>")
SafeHtml deselected(String option);
@Template("<option value=\"{0}\" selected=\"selected\">{0}</option>")
SafeHtml selected(String option);
@Template("<select id=\"{0}\" class=\"{1}\" tabindex=\"-1\" >")
SafeHtml selectEnabled(String id, String classNames);
@Template("<select id=\"{0}\" class=\"{1}\" tabindex=\"-1\" disabled>")
SafeHtml selectDisabled(String id, String classNames);
}
private static CellTemplate template = GWT.create(CellTemplate.class);
private final HashMap<String, Integer> indexForOption = new HashMap<>();
private List<String> options;
private boolean isEnabled = true;
private String style;
/**
* Construct a new {@link com.google.gwt.cell.client.SelectionCell} with the specified options.
*
* @param options
* the options in the cell
*/
public CustomSelectionCell(List<String> options) {
super();
this.options = new ArrayList<>(options);
int index = 0;
for (String option : options) {
indexForOption.put(option, index++);
}
}
/**
* Events to sink. By default, we only sink mouse events that tooltips need. Override this
* (and include addAll(super.getConsumedEvents())'s events!) if your cell needs to respond
* to additional events.
*/
@Override
public Set<String> getConsumedEvents() {
Set<String> set = new HashSet<>(super.getConsumedEvents());
set.add(BrowserEvents.CHANGE);
return set;
}
@Override
public void onBrowserEvent(Context context, Element parent, String value,
NativeEvent event, ValueUpdater<String> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
String type = event.getType();
if (BrowserEvents.CHANGE.equals(type)) {
Object key = context.getKey();
SelectElement select = parent.getFirstChild().cast();
String newValue = options.get(select.getSelectedIndex());
setViewData(key, newValue);
finishEditing(parent, newValue, key, valueUpdater);
if (valueUpdater != null) {
valueUpdater.update(newValue);
}
}
}
@Override
public void render(Context context, String value, SafeHtmlBuilder sb, String id) {
// Get the view data.
Object key = context.getKey();
String viewData = getViewData(key);
if (viewData != null) {
clearViewData(key);
viewData = null;
}
if (isEnabled) {
sb.append(template.selectEnabled(id, style));
}
else {
sb.append(template.selectDisabled(id, style));
}
int index = 0;
int selectedIndex = getSelectedIndex(value);
for (String option : options) {
if (index++ == selectedIndex) {
sb.append(template.selected(option));
} else {
sb.append(template.deselected(option));
}
}
sb.appendHtmlConstant("</select>"); //$NON-NLS-1$
}
private int getSelectedIndex(String value) {
Integer index = indexForOption.get(value);
if (index == null) {
return -1;
}
return index.intValue();
}
public void setEnabled(boolean isEnabled) {
this.isEnabled = isEnabled;
}
public void setStyle(String style) {
this.style = style;
}
public void setOptions(List<String> options) {
this.options = new ArrayList<>(options);
int index = 0;
for (String option : options) {
indexForOption.put(option, index++);
}
}
}