Nokia 6600 - backlight

[speedyg]

Hi,

Because the vibrator can't be controlled on the 6600, I started to create a visual effect with the backlight.
Here is the code that makes this effect :

import javax.microedition.lcdui.*;
import com.nokia.mid.ui.*;

public class Flash
implements Runnable
{
private Display display;

public Flash(Display display)
{
this.display = display;
}

public synchronized void run()
{
int count = 0;

try
{
do
{
display.flashBacklight(250);

wait(250);

display.flashBacklight(0);

wait(250);
}
while (count++ < 4);

DeviceControl.setLights(0, 100); //does nothing
}
catch (InterruptedException ie)
{

}
}
}

Is there a best way to do that kind of effect ?
And most importantly when the loop ends, the backlight of the phone is turned off.
Is it possible to turn it on ? I tried and use the DeviceControl class without success.

Nokia 6600 firmware: v3.42.1 16-10-03 NHL-10

Here is the MIDlet that I use to test the effect

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class FlashMIDlet
extends MIDlet
implements CommandListener
{
private Form form = new Form("Flash");

private Command exit = new Command("Exit", Command.EXIT, 1);

private Command flash = new Command("Flash", Command.SCREEN, 1);

public void startApp()
{
form.addCommand(exit);
form.addCommand(flash);

form.setCommandListener(this);

Display.getDisplay(this).setCurrent(form);
}

public void pauseApp()
{

}

public void destroyApp(boolean param)
{

}

public void commandAction(Command command, Displayable displayable)
{
if (command == exit)
{
destroyApp(true);

notifyDestroyed();
}
else if (command == flash)
{
new Thread(new Flash(Display.getDisplay(this))).start();
}
}
}

[dpolyakov]

IMHO, it is not the best way to do flashing.
If you want to make your screen darker, you may use 2 approaches:
1) Nokia API's DirectGraphics. Use the transparency. This method is very nice one but only if you orient only on Nokia phones.
2) Use dark textures. This method will work everywhere but requres twice more memory... If your game is not a big one - use this method.

Dima.

[speedyg]

Hi Dima,

You're right, we could use the Nokia's API. Unfortunately I forgot to mention that our application is not a game and uses Screen objects instead of Canvas.
If only this damned vibrator could be controlled ... :-(

Olivier.

[darkside1000]

Get FExplorer from http://www.gosymbian.com/ and use the Tools menu option it has to turn the light on (and leave the program running when you switch to other apps, instead of closing it).