ScreenTimeoutButton.java

package com.android.settings.widget.buttons;

import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings;

import com.android.settings.R;
import com.android.settings.widget.SettingsAppWidgetProvider;
import com.android.settings.widget.WidgetSettings;

public class ScreenTimeoutButton extends WidgetButton {

	public static final int SCREEN_MINIMUM_TIMEOUT = 15000;
	public static final int SCREEN_LOW_TIMEOUT = 30000;
	public static final int SCREEN_NORMAL_TIMEOUT = 60000;
	public static final int SCREEN_HI_TIMEOUT = 120000;
	public static final int SCREEN_MAX_TIMEOUT = 300000;


	private static final int MODE_15_60_300= 0;
	private static final int MODE_30_120_300 = 1;

	private static final int DEFAULT_SETTTING = 0;	

	static ScreenTimeoutButton ownButton=null;

	private int currentMode;    

	public static int getScreenTtimeout(Context context) {
		return Settings.System.getInt(
				context.getContentResolver(), 
				Settings.System.SCREEN_OFF_TIMEOUT, 0);
	}


	public void toggleState(Context context) {
		int screentimeout=getScreenTtimeout(context);
		if (screentimeout<SCREEN_MINIMUM_TIMEOUT) {
			if (currentMode==MODE_15_60_300) {
				screentimeout=SCREEN_MINIMUM_TIMEOUT;
			} else {
				screentimeout=SCREEN_LOW_TIMEOUT;				
			}
		} else if (screentimeout<SCREEN_LOW_TIMEOUT) {
			if (currentMode==MODE_15_60_300) {
				screentimeout=SCREEN_NORMAL_TIMEOUT;
			} else {
				screentimeout=SCREEN_LOW_TIMEOUT;				
			}
		} else if (screentimeout<SCREEN_NORMAL_TIMEOUT) {
			if (currentMode==MODE_15_60_300) {
				screentimeout=SCREEN_NORMAL_TIMEOUT;
			} else {
				screentimeout=SCREEN_HI_TIMEOUT;				
			}
		} else if (screentimeout<SCREEN_HI_TIMEOUT) {
			if (currentMode==MODE_15_60_300) {
				screentimeout=SCREEN_MAX_TIMEOUT;
			} else {
				screentimeout=SCREEN_HI_TIMEOUT;				
			}
		} else if (screentimeout<SCREEN_MAX_TIMEOUT) {
			screentimeout=SCREEN_MAX_TIMEOUT;
		} else if (currentMode==MODE_30_120_300) {
			screentimeout=SCREEN_LOW_TIMEOUT;
		} else  {
			screentimeout=SCREEN_MINIMUM_TIMEOUT;			
		}
		Settings.System.putInt(
				context.getContentResolver(), 
				Settings.System.SCREEN_OFF_TIMEOUT, screentimeout);        	
	}

	public static ScreenTimeoutButton getInstance() {
		if (ownButton==null)
			ownButton = new ScreenTimeoutButton();

		return ownButton;
	}    

	@Override
	void initButton() {
		buttonID=WidgetButton.BUTTON_SCREEN_TIMEOUT;
		preferenceName=WidgetSettings.TOGGLE_SCREEN_TIMEOUT;
	}

	@Override
	public void updateState(Context context,
			SharedPreferences globalPreferences, int[] appWidgetIds) {

		currentMode=globalPreferences.getInt(WidgetSettings.SCREEN_TIMEOUT_SPINNER, DEFAULT_SETTTING);

		int timeout=getScreenTtimeout(context);
		//TODO: ADD support for the possible values
		if (timeout <=SCREEN_LOW_TIMEOUT) {
			currentIcon=R.drawable.ic_appwidget_settings_screen_timeout_off;
			currentState=SettingsAppWidgetProvider.STATE_DISABLED;
		} else if (timeout <=SCREEN_HI_TIMEOUT) {
			currentIcon=R.drawable.ic_appwidget_settings_screen_timeout_off;
			currentState=SettingsAppWidgetProvider.STATE_INTERMEDIATE;
		} else {
			currentIcon=R.drawable.ic_appwidget_settings_screen_timeout_on;
			currentState=SettingsAppWidgetProvider.STATE_ENABLED;
		}		
	}

}