javax.microedition.lcdui.Alert Maven / Gradle / Ivy
/*
* MicroEmulator
* Copyright (C) 2001 Bartek Teodorczyk
* Copyright (C) 2005 Andres Navarro
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contributor(s):
* 3GLab
*/
package javax.microedition.lcdui;
public class Alert extends Screen
{
public static final int FOREVER = -2;
ImageStringItem alertContent;
AlertType type;
// XXX actually the label for this should be an empty String
// but the implementation is free to show a label
// so the label should be set to "" and on the Command render
// we should check if it was the dismiss command and
// display a predefined label...
public static final Command DISMISS_COMMAND = new Command("OK", Command.OK, 0);
int time;
Gauge indicator;
// this is for alertListener
static Displayable nextDisplayable;
static CommandListener defaultListener = new CommandListener()
{
public void commandAction(Command cmd, Displayable d)
{
// XXX if nextDisplayable == null
// then it means that this Alert was
// setted current when there was not a previous
// Displayable (ie immediately after MIDlet start)
// in that particular case the initial state should
// be restored
((Alert) d).currentDisplay.setCurrent(nextDisplayable);
}
};
public Alert(String title)
{
this(title, null, null, null);
}
public Alert(String title, String alertText, Image alertImage, AlertType alertType)
{
super(title);
setTimeout(getDefaultTimeout());
this.alertContent = new ImageStringItem(null, alertImage, alertText);
setType(alertType);
super.addCommand(Alert.DISMISS_COMMAND);
super.setCommandListener(defaultListener);
}
public void addCommand(Command cmd)
{
if (cmd == Alert.DISMISS_COMMAND) {
return;
} else {
super.addCommand(cmd);
super.removeCommand(Alert.DISMISS_COMMAND);
}
}
public void removeCommand(Command cmd) {
if (cmd == Alert.DISMISS_COMMAND) {
return;
} else {
super.removeCommand(cmd);
if (getCommands().size() == 0) {
super.addCommand(Alert.DISMISS_COMMAND);
}
}
}
public int getDefaultTimeout()
{
return Alert.FOREVER;
}
public String getString()
{
return alertContent.getText();
}
public int getTimeout()
{
return time;
}
public AlertType getType()
{
return type;
}
public void setType(AlertType type)
{
this.type = type;
repaint();
}
public void setCommandListener(CommandListener l)
{
if (l == null)
l = defaultListener;
super.setCommandListener(l);
}
public Image getImage()
{
return alertContent.getImage();
}
public void setImage(Image img)
{
if (img.isMutable()) {
img = Image.createImage(img);
}
alertContent.setImage(img);
repaint();
}
public Gauge getIndicator() {
return indicator;
}
public void setIndicator(Gauge indicator) {
if (indicator == null) {
if (this.indicator != null)
this.indicator.setOwner(null);
this.indicator = null;
repaint();
return;
}
// validate the gauge against the restrictrions
if (indicator.getLayout() != 0 ||
indicator.getLabel() != null ||
indicator.prefHeight != -1 ||
indicator.prefWidth != -1 ||
indicator.commandListener != null ||
indicator.isInteractive() ||
indicator.getOwner() != null ||
!indicator.commands.isEmpty()) {
// if the command vector is empty then
// there is no default command
throw new IllegalArgumentException(
"This gauge cannot be added to an Alert");
}
indicator.setOwner(this);
this.indicator = indicator;
repaint();
}
public void setString(String str)
{
alertContent.setText(str);
repaint();
}
public void setTimeout(int time)
{
if (time != FOREVER && time <= 0) {
throw new IllegalArgumentException();
}
// XXX stop timeout thread!
if (time != FOREVER && getCommands().size() > 1)
time = FOREVER;
this.time = time;
}
private int getContentHeight()
{
return alertContent.getHeight();
}
int paintContent(Graphics g)
{
return alertContent.paint(g);
}
void showNotify()
{
super.showNotify();
viewPortY = 0;
}
int traverse(int gameKeyCode, int top, int bottom)
{
Font f = Font.getDefaultFont();
if (gameKeyCode == 1 && top != 0) {
return -f.getHeight();
}
if (gameKeyCode == 6 && bottom < getContentHeight()) {
return f.getHeight();
}
return 0;
}
}