CaRMtl/rene/gui/HistoryTextField.java

197 lines
4.5 KiB
Java
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/*
Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
This file is part of C.a.R. software.
C.a.R. is a free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.
C.a.R. is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rene.gui;
import java.awt.BorderLayout;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import rene.util.FileName;
import rene.util.list.ListClass;
import rene.util.list.ListElement;
/**
* A TextField, which display the old input, when cursor up is pressed. The old
* input is stored in a list. The class is derived from TextFieldAction.
*
* @see TextFieldAction
*/
public class HistoryTextField extends TextFieldAction implements KeyListener,
DoActionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
ListClass H;
PopupMenu M = null;
boolean Trigger = false;
public int MaxLength = 48;
public HistoryTextField(final DoActionListener l, final String name) {
super(l, name);
H = new ListClass();
H.append(new ListElement(""));
addKeyListener(this);
}
public HistoryTextField(final DoActionListener l, final String name,
final int s) {
super(l, name, s);
H = new ListClass();
H.append(new ListElement(""));
addKeyListener(this);
}
public void keyPressed(final KeyEvent ev) {
switch (ev.getKeyCode()) {
case KeyEvent.VK_UP:
case KeyEvent.VK_DOWN:
if (M == null) {
M = new PopupMenu();
ListElement e = H.last();
int i = 0;
final int n = Global.getParameter("history.length", 10);
while (e != null && i < n) {
final String t = (String) e.content();
if (!t.equals("")) {
final MenuItem item = new MenuItemAction(this, FileName
.chop(t, MaxLength), t);
M.add(item);
}
e = e.previous();
i++;
}
add(M);
}
M.show(this, 10, 10);
break;
default:
return;
}
}
public void keyReleased(final KeyEvent e) {
}
public void keyTyped(final KeyEvent e) {
}
String Last = "";
public void remember(final String s) {
if (s.equals(Last))
return;
deleteFromHistory(s);
Last = s;
H.last().content(s);
H.append(new ListElement(""));
M = null;
}
public void deleteFromHistory(final String s) {
ListElement e = H.first();
while (e != null) {
final String t = (String) e.content();
final ListElement next = e.next();
if (t.equals(s)) {
H.remove(e);
if (H.first() == null)
H.append(new ListElement(""));
}
e = next;
}
}
public void remember() {
remember(getText());
}
public void saveHistory(final String name) {
int i;
final int n = Global.getParameter("history.length", 10);
Global.removeAllParameters("history." + name);
ListElement e = H.last();
if (e == null)
return;
for (i = 0; i < n && e != null; e = e.previous()) {
final String s = (String) e.content();
if (!s.equals("")) {
i++;
Global.setParameter("history." + name + "." + i, s);
}
}
}
public void loadHistory(final String name) {
int i = 1;
H = new ListClass();
H.append(new ListElement(""));
while (Global.haveParameter("history." + name + "." + i)) {
final String s = Global.getParameter("history." + name + "." + i,
"");
if (!s.equals("") && filterHistory(s))
H.prepend(new ListElement(s));
i++;
}
}
public boolean filterHistory(final String name) {
return true;
}
public ListClass getHistory() {
return H;
}
public void setTrigger(final boolean f) {
Trigger = f;
}
public void doAction(final String o) {
if (!o.equals("")) {
setText(o);
if (Trigger)
triggerAction();
}
}
public void itemAction(final String o, final boolean flag) {
}
public static void main(final String args[]) {
final CloseFrame f = new CloseFrame("test");
final HistoryTextField t = new HistoryTextField(f, "Test", 30);
t.remember("AAAA");
t.remember("BBBB");
t.remember("CCCC");
t.remember("DDDD");
f.setLayout(new BorderLayout());
f.add("Center", t);
f.add("South", new HistoryTextFieldChoice(t));
f.pack();
f.setVisible(true);
}
}