gecko-dev/grendel/ui/FolderCombo.java
grail%cafebabe.org 834458b4fa Stupid stupid stupid. JComboBox.removeAllItems() NullExceptions if
there's a zero count. The safe way to call it is by:

if (combobox.getItemCount() > 0) {
  combobox.removeAllItems();
}

This is stupid.
1999-01-20 09:53:28 +00:00

179 lines
4.8 KiB
Java

/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1997
* Netscape Communications Corporation. All Rights Reserved.
*
* Created: Will Scullin <scullin@netscape.com>, 6 Nov 1997.
*/
package grendel.ui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.util.StringTokenizer;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.Folder;
import javax.swing.ImageIcon;
import javax.swing.ListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.border.EmptyBorder;
import javax.swing.UIManager;
import grendel.view.ViewedStore;
import grendel.view.ViewedFolder;
public class FolderCombo extends JComboBox {
int fExclude;
int fInclude;
Color fTextColor;
Color fHighlightTextColor;
Color fWindowColor;
Color fHighlightColor;
public FolderCombo() {
updateUI();
}
public void populate() {
populate(-1, 0);
}
public void populate(int aInclude, int aExclude) {
ViewedStore stores[] = StoreFactory.Instance().getStores();
fInclude = aInclude;
fExclude = aExclude;
// this hack is getting old. why do i need it in the first place?
// this sucks!
if (getItemCount() > 0) {
removeAllItems();
}
try {
for (int i = 0; i < stores.length; i++) {
populateRecurse(stores[i], fInclude, fExclude);
}
} catch (MessagingException e) {
e.printStackTrace();
}
}
int populateRecurse(ViewedFolder aFolder, int fInclude, int fExclude)
throws MessagingException {
int total = 0;
while (aFolder != null) {
int idx = getItemCount();
int count = populateRecurse(aFolder.getFirstSubFolder(),
fInclude, fExclude);
total += count;
if ((aFolder.getFolder().getType() & fInclude) != 0 &&
(aFolder.getFolder().getType() & fExclude) == 0) {
insertItemAt(aFolder, idx);
total++;
} else if (count > 0) {
insertItemAt(aFolder, idx);
total++;
}
aFolder = aFolder.getNextFolder();
}
return total;
}
public ViewedFolder getSelectedFolder() {
return (ViewedFolder) getSelectedItem();
}
class FolderRenderer extends JLabel implements ListCellRenderer {
public FolderRenderer() {
setIcon(new ImageIcon(getClass().getResource("/grendel/ui/images/folder-small.gif")));
setOpaque(true);
}
public Component getListCellRendererComponent(JList aList,
Object aValue,
int aIndex,
boolean aIsSelected,
boolean aHasFocus) {
boolean isEnabled = true;
Folder folder = null;
if (aValue != null) {
folder = ((ViewedFolder) aValue).getFolder();
}
if (folder != null) {
try {
StringTokenizer counter =
new StringTokenizer(folder.getFullName(),
"" +
folder.getSeparator());
int depth = counter.countTokens();
setBorder(new EmptyBorder(0, depth * 16, 0, 0));
setText(folder.getName());
if ((folder.getType() & fInclude) == 0 ||
(folder.getType() & fExclude) != 0) {
isEnabled = false;
}
} catch (MessagingException e) {
e.printStackTrace();
}
} else {
setText("");
}
setEnabled(isEnabled);
if (aIsSelected) {
setBackground(fHighlightColor);
setForeground(fHighlightTextColor);
} else {
setBackground(fWindowColor);
setForeground(fTextColor);
}
return this;
}
}
public void updateUI() {
super.updateUI();
fTextColor = UIManager.getColor("textText");
fHighlightTextColor = UIManager.getColor("textHighlightText");
fWindowColor = UIManager.getColor("window");
fHighlightColor = UIManager.getColor("textHighlight");
setRenderer(new FolderRenderer());
}
}