Initial Contribution

1 files changed, 103 insertions, 0 deletions

diff --git a/src/com/android/settings/BrightnessPreference.java b/src/com/android/settings/BrightnessPreference.java
new file mode 100644
index 0000000..a9851cc
--- /dev/null
+++ b/src/com/android/settings/BrightnessPreference.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings;
+
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.IHardwareService;
+import android.os.ServiceManager;
+import android.preference.SeekBarPreference;
+import android.provider.Settings;
+import android.provider.Settings.SettingNotFoundException;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.widget.SeekBar;
+
+import java.util.Map;
+
+public class BrightnessPreference extends SeekBarPreference implements
+        SeekBar.OnSeekBarChangeListener {
+
+    private SeekBar mSeekBar;
+    
+    private int mOldBrightness;
+    
+    // Backlight range is from 0 - 255. Need to make sure that user
+    // doesn't set the backlight to 0 and get stuck
+    private static final int MINIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_DIM + 10;
+    private static final int MAXIMUM_BACKLIGHT = android.os.Power.BRIGHTNESS_ON;
+
+    public BrightnessPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        mSeekBar = getSeekBar(view);
+        mSeekBar.setOnSeekBarChangeListener(this);
+        mSeekBar.setMax(MAXIMUM_BACKLIGHT - MINIMUM_BACKLIGHT);
+        try {
+            mOldBrightness = Settings.System.getInt(getContext().getContentResolver(), 
+                Settings.System.SCREEN_BRIGHTNESS);
+        } catch (SettingNotFoundException snfe) {
+            mOldBrightness = MAXIMUM_BACKLIGHT;
+        }
+        mSeekBar.setProgress(mOldBrightness - MINIMUM_BACKLIGHT);
+    }
+
+    public void onProgressChanged(SeekBar seekBar, int progress,
+            boolean fromTouch) {
+        setBrightness(progress + MINIMUM_BACKLIGHT);
+    }
+
+    public void onStartTrackingTouch(SeekBar seekBar) {
+        // NA
+    }
+
+    public void onStopTrackingTouch(SeekBar seekBar) {
+        // NA
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+        
+        if (positiveResult) {
+            Settings.System.putInt(getContext().getContentResolver(), 
+                    Settings.System.SCREEN_BRIGHTNESS,
+                    mSeekBar.getProgress() + MINIMUM_BACKLIGHT);
+        } else {
+            setBrightness(mOldBrightness);
+        }
+    }
+    
+    private void setBrightness(int brightness) {
+        try {
+            IHardwareService hardware = IHardwareService.Stub.asInterface(
+                    ServiceManager.getService("hardware"));
+            if (hardware != null) {
+                hardware.setScreenBacklight(brightness);
+            }
+        } catch (RemoteException doe) {
+            
+        }        
+    }
+}
+