Slowlyness comes from memory leak.
The other problem remains. If anybody has any idea what I can do,
please tell me!
If it helps, here's the source of the widget which seems to cause
everything:
public class EnhancedSelectBox extends VerticalPanel implements
CloseHandler,
DoubleClickHandler, HasChangeHandlers {
private Button windowButton;
private EnhancedListBox listbox; // only a normal listbox with
additional double click handling
private HTML header;
private DialogWindow window; // popup-panel with window
decorations
private SelectionPanel windowContent; // any panel that has
methods getSelectionList(), clearSelectionList()
private String window_title;
private String headerString;
public EnhancedSelectBox(String heading, String button_label,
String window_title, SelectionPanel windowContent, int width) {
this.window_title = window_title;
this.windowContent = windowContent;
this.windowButton = new Button(button_label, new ClickHandler
() {
public void onClick(ClickEvent event) {
showWindow();
}
});
this.headerString = heading;
header = new HTML(heading);
header.setStyleName("boldLabel");
listbox = new EnhancedListBox();
listbox.addDoubleClickHandler(this);
listbox.setVisibleItemCount(10);
listbox.setWidth(width + "px");
add(this.windowButton);
add(this.header);
add(this.listbox);
this.window = new DialogWindow(this.window_title, false, true,
true, "Auswaehlen und Schliessen");
if (this.windowContent != null && this.windowContent
instanceof Widget) {
this.window.setWidget((Widget) this.windowContent);
}
this.window.addCloseHandler(this);
}
public EnhancedSelectBox(String heading, String button_label,
String window_title, int width) {
this(heading, button_label, window_title, null, width, false);
}
protected void showWindow() {
this.window.center();
}
public ArrayList<String> getSelectedItems() {
if (this.windowContent != null) {
ArrayList<String> update =
this.windowContent.getSelectionList();
return update;
}
return new ArrayList<String>();
}
public void clearSelectionList() {
if (this.windowContent != null) {
this.windowContent.clearSelectionList();
updateSelectionList();
}
}
public void updateSelectionList() {
if (this.windowContent != null) {
ArrayList<String> update =
this.windowContent.getSelectionList();
this.listbox.clear();
for (int i = 0; i < update.size(); i++) {
this.listbox.addItem(update.get(i));
}
}
}
public void setWindowPanel(SelectionPanel p) {
this.windowContent = p;
if (this.window != null) {
this.window.setWidget((Widget) this.windowContent);
}
}
public SelectionPanel getWindowPanel() {
return this.windowContent;
}
public void setHeader(String header) {
this.headerString = header;
this.header.setText(this.headerString);
}
public void setWidth(int w) {
this.listbox.setWidth(w + "px");
}
public void onDoubleClick(DoubleClickEvent event) {
showWindow();
}
public HandlerRegistration addPopupCloseHandler(CloseHandler
handler) {
return this.window.addCloseHandler(handler);
}
public HandlerRegistration addChangeHandler(ChangeHandler handler)
{
return addDomHandler(handler, ChangeEvent.getType());
}
public void onClose(CloseEvent event) {
updateSelectionList();
ChangeEvent.fireNativeEvent( Document.get().createChangeEvent
(), this);
}
}
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