Source code: org/gjt/sp/jedit/gui/BufferSwitcher.java
1 /*
2 * BufferSwitcher.java - Status bar
3 * Copyright (C) 2000 Slava Pestov
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20 package org.gjt.sp.jedit.gui;
21
22 import javax.swing.*;
23 import java.awt.event.*;
24 import java.awt.*;
25 import org.gjt.sp.jedit.*;
26
27 public class BufferSwitcher extends JComboBox
28 {
29 public BufferSwitcher(EditPane editPane)
30 {
31 this.editPane = editPane;
32
33 //setFont(new Font("Dialog",Font.BOLD,10));
34 setRenderer(new BufferCellRenderer());
35 setMaximumRowCount(jEdit.getIntegerProperty("bufferSwitcher.maxRowCount",10));
36 addActionListener(new ActionHandler());
37 }
38
39 public void updateBufferList()
40 {
41 // if the buffer count becomes 0, then it is guaranteed to
42 // become 1 very soon, so don't do anything in that case.
43 if(jEdit.getBufferCount() == 0)
44 return;
45
46 updating = true;
47 setMaximumRowCount(jEdit.getIntegerProperty("bufferSwitcher.maxRowCount",10));
48 setModel(new DefaultComboBoxModel(jEdit.getBuffers()));
49 setSelectedItem(editPane.getBuffer());
50 updating = false;
51 }
52
53 // private members
54 private EditPane editPane;
55 private boolean updating;
56
57 class ActionHandler implements ActionListener
58 {
59 public void actionPerformed(ActionEvent evt)
60 {
61 if(!updating)
62 {
63 Buffer buffer = (Buffer)getSelectedItem();
64 if(buffer != null)
65 editPane.setBuffer(buffer);
66 }
67 }
68 }
69
70 class BufferCellRenderer extends DefaultListCellRenderer
71 {
72 public Component getListCellRendererComponent(
73 JList list, Object value, int index,
74 boolean isSelected, boolean cellHasFocus)
75 {
76 super.getListCellRendererComponent(list,value,index,
77 isSelected,cellHasFocus);
78 Buffer buffer = (Buffer)value;
79 if(buffer == null)
80 setIcon(null);
81 else
82 setIcon(buffer.getIcon());
83 return this;
84 }
85 }
86 }