1 files changed, 173 insertions, 0 deletions
diff --git a/CrespoParts/src/com/cyanogenmod/CrespoParts/ColorTuningPreference.java b/CrespoParts/src/com/cyanogenmod/CrespoParts/ColorTuningPreference.java
new file mode 100644
index 0000000..4eb5f88
--- /dev/null
+++ b/CrespoParts/src/com/cyanogenmod/CrespoParts/ColorTuningPreference.java
@@ -0,0 +1,173 @@
+package com.cyanogenmod.CrespoParts;
+
+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 ColorTuningPreference extends DialogPreference {
+
+    enum Colors {
+        RED,
+        GREEN,
+        BLUE
+    };
+
+    private static final int[] SEEKBAR_ID = new int[] {
+        R.id.color_red_seekbar,
+        R.id.color_green_seekbar,
+        R.id.color_blue_seekbar
+    };
+
+    private static final int[] VALUE_DISPLAY_ID = new int[] {
+        R.id.color_red_value,
+        R.id.color_green_value,
+        R.id.color_blue_value
+    };
+
+    private static final String[] FILE_PATH = new String[] {
+        "/sys/class/misc/voodoo_color/red_multiplier",
+        "/sys/class/misc/voodoo_color/green_multiplier",
+        "/sys/class/misc/voodoo_color/blue_multiplier"
+    };
+
+    private ColorSeekBar mSeekBars[] = new ColorSeekBar[3];
+
+    private static final int MAX_VALUE = Integer.MAX_VALUE;
+
+    // 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 ColorTuningPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        setDialogLayoutResource(R.layout.preference_dialog_color_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 ColorSeekBar(seekBar, valueDisplay, FILE_PATH[i]);
+        }
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        sInstances--;
+
+        if (positiveResult) {
+            for (ColorSeekBar csb : mSeekBars) {
+                csb.save();
+            }
+        } else if (sInstances == 0) {
+            for (ColorSeekBar 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) {
+            int value = sharedPrefs.getInt(filePath, MAX_VALUE);
+            Utils.writeColor(filePath, value);
+        }
+    }
+
+    /**
+     * 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 ColorSeekBar implements SeekBar.OnSeekBarChangeListener {
+
+        private String mFilePath;
+        private int mOriginal;
+        private SeekBar mSeekBar;
+        private TextView mValueDisplay;
+
+        public ColorSeekBar(SeekBar seekBar, TextView valueDisplay, String filePath) {
+            mSeekBar = seekBar;
+            mValueDisplay = valueDisplay;
+            mFilePath = filePath;
+
+            // Read original value
+            SharedPreferences sharedPreferences = getSharedPreferences();
+            mOriginal = sharedPreferences.getInt(mFilePath, MAX_VALUE);
+
+            seekBar.setMax(MAX_VALUE);
+            reset();
+            seekBar.setOnSeekBarChangeListener(this);
+        }
+
+        public void reset() {
+            mSeekBar.setProgress(mOriginal);
+            updateValue(mOriginal);
+        }
+
+        public void save() {
+            Editor editor = getEditor();
+            editor.putInt(mFilePath, mSeekBar.getProgress());
+            editor.commit();
+        }
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress,
+                boolean fromUser) {
+            Utils.writeColor(mFilePath, progress);
+            updateValue(progress);
+        }
+
+        @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("%.10f", (double) progress / MAX_VALUE));
+        }
+
+    }
+
+}