1 files changed, 211 insertions, 0 deletions
diff --git a/GNexusParts/src/com/cyanogenmod/settings/device/GammaTuningPreference.java b/GNexusParts/src/com/cyanogenmod/settings/device/GammaTuningPreference.java
new file mode 100644
index 0000000..bfbc62e
--- /dev/null
+++ b/GNexusParts/src/com/cyanogenmod/settings/device/GammaTuningPreference.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2011 The CyanogenMod 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.cyanogenmod.settings.device;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.preference.DialogPreference;
+import android.preference.PreferenceManager;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+/**
+ * Special preference type that allows configuration of both the ring volume and
+ * notification volume.
+ */
+public class GammaTuningPreference extends DialogPreference {
+
+    private static final String TAG = "GAMMA...";
+
+    enum Colors {
+        RED, GREEN, BLUE
+    };
+
+    private static final int[] SEEKBAR_ID = new int[] {
+            R.id.gamma_red_seekbar, R.id.gamma_green_seekbar, R.id.gamma_blue_seekbar
+    };
+
+    private static final int[] VALUE_DISPLAY_ID = new int[] {
+            R.id.gamma_red_value, R.id.gamma_green_value, R.id.gamma_blue_value
+    };
+
+    private static final String[] FILE_PATH = new String[] {
+            "/sys/class/misc/samoled_color/red_v1_offset",
+            "/sys/class/misc/samoled_color/green_v1_offset",
+            "/sys/class/misc/samoled_color/blue_v1_offset"
+    };
+
+    private GammaSeekBar mSeekBars[] = new GammaSeekBar[3];
+
+    private static final int MAX_VALUE = 80;
+
+    private static final int OFFSET_VALUE = 0;
+
+    // Track instances to know when to restore original color
+    // (when the orientation changes, a new dialog is created before the old one
+    // is destroyed)
+    private static int sInstances = 0;
+
+    public GammaTuningPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        setDialogLayoutResource(R.layout.preference_dialog_gamma_tuning);
+    }
+
+    @Override
+    protected void onBindDialogView(View view) {
+        super.onBindDialogView(view);
+
+        sInstances++;
+
+        for (int i = 0; i < SEEKBAR_ID.length; i++) {
+            SeekBar seekBar = (SeekBar) view.findViewById(SEEKBAR_ID[i]);
+            TextView valueDisplay = (TextView) view.findViewById(VALUE_DISPLAY_ID[i]);
+            mSeekBars[i] = new GammaSeekBar(seekBar, valueDisplay, FILE_PATH[i]);
+        }
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        sInstances--;
+
+        if (positiveResult) {
+            for (GammaSeekBar csb : mSeekBars) {
+                csb.save();
+            }
+        } else if (sInstances == 0) {
+            for (GammaSeekBar csb : mSeekBars) {
+                csb.reset();
+            }
+        }
+    }
+
+    /**
+     * Restore screen color tuning from SharedPreferences. (Write to kernel.)
+     * 
+     * @param context The context to read the SharedPreferences from
+     */
+    public static void restore(Context context) {
+        if (!isSupported()) {
+            return;
+        }
+
+        SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        for (String filePath : FILE_PATH) {
+            String sDefaultValue = Utils.readOneLine(filePath);
+            int iValue = sharedPrefs.getInt(filePath, Integer.valueOf(sDefaultValue));
+            Utils.writeValue(filePath, String.valueOf((long) iValue));
+        }
+    }
+
+    /**
+     * Check whether the running kernel supports color tuning or not.
+     * 
+     * @return Whether color tuning is supported or not
+     */
+    public static boolean isSupported() {
+        boolean supported = true;
+        for (String filePath : FILE_PATH) {
+            if (!Utils.fileExists(filePath)) {
+                supported = false;
+            }
+        }
+
+        return supported;
+    }
+
+    class GammaSeekBar implements SeekBar.OnSeekBarChangeListener {
+
+        private String mFilePath;
+
+        private int mOriginal;
+
+        private SeekBar mSeekBar;
+
+        private TextView mValueDisplay;
+
+        public GammaSeekBar(SeekBar seekBar, TextView valueDisplay, String filePath) {
+            int iValue;
+
+            mSeekBar = seekBar;
+            mValueDisplay = valueDisplay;
+            mFilePath = filePath;
+
+            SharedPreferences sharedPreferences = getSharedPreferences();
+
+            // Read original value
+            if (Utils.fileExists(mFilePath)) {
+                String sDefaultValue = Utils.readOneLine(mFilePath);
+                iValue = Integer.valueOf(sDefaultValue);
+            } else {
+                iValue = MAX_VALUE - OFFSET_VALUE;
+            }
+            mOriginal = iValue;
+
+            mSeekBar.setMax(MAX_VALUE);
+            reset();
+            mSeekBar.setOnSeekBarChangeListener(this);
+        }
+
+        public void reset() {
+            int iValue;
+
+            iValue = mOriginal + OFFSET_VALUE;
+            mSeekBar.setProgress(iValue);
+            updateValue(mOriginal);
+        }
+
+        public void save() {
+            int iValue;
+
+            iValue = mSeekBar.getProgress() - OFFSET_VALUE;
+            Editor editor = getEditor();
+            editor.putInt(mFilePath, iValue);
+            editor.commit();
+        }
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+            int iValue;
+
+            iValue = progress - OFFSET_VALUE;
+            Utils.writeValue(mFilePath, String.valueOf((long) iValue));
+            updateValue(iValue);
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {
+            // Do nothing
+        }
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {
+            // Do nothing
+        }
+
+        private void updateValue(int progress) {
+            mValueDisplay.setText(String.format("%d", (int) progress));
+        }
+
+    }
+
+}