Add 3 row chromatic layout

This patch adds a 3 row chromatic keyboard layout, for experimentation.

android/res/values/strings.xml

@@ -86,13 +86,15 @@
   <!-- Preferences -->
   <string name="pref_keyboardType">Keyboard Type</string>
   <string-array name="pref_keyboardType_entries">
-      <item>2 Level (Piano)</item>
-      <item>3 Level</item>
-  </string-array>
+      <item>2 Row (Piano)</item>
+      <item>3 Row</item>
+      <item>3 Row Chromatic</item>
+      </string-array>
   <string-array name="pref_keyboardType_values">
-      <item>2level</item>
-      <item>3level</item>
-  </string-array>
-  <string name="pref_keyboardType_default">2level</string>
+      <item>2row</item>
+      <item>3row</item>
+      <item>3chrome</item>
+      </string-array>
+  <string name="pref_keyboardType_default">2row</string>
 
 </resources>

android/src/com/levien/synthesizer/android/ui/PianoActivity2.java

@@ -120,12 +120,8 @@ public class PianoActivity2 extends SynthActivity implements OnSharedPreferenceC
 
   public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
     if (key.equals("keyboard_type")) {
-      String keyboardType = prefs.getString(key, "2level");
-      if (keyboardType.equals("2level")) {
-        keyboard_.setKeyboardSpec(KeyboardSpec.make2Layer());
-      } else if (keyboardType.equals("3level")) {
-        keyboard_.setKeyboardSpec(KeyboardSpec.make3Layer());
-      }
+      String keyboardType = prefs.getString(key, "2row");
+      keyboard_.setKeyboardSpec(KeyboardSpec.make(keyboardType));
     }
   }
 

android/src/com/levien/synthesizer/android/widgets/keyboard/KeyboardSpec.java

@@ -38,7 +38,7 @@ public class KeyboardSpec {
     addKey(ks);
   }
 
-  public static KeyboardSpec make2Layer() {
+  public static KeyboardSpec make2Row() {
     KeyboardSpec ks = new KeyboardSpec(12, 84, 24);
     final int w = Color.WHITE;
     final int b = Color.BLACK;
@@ -57,7 +57,7 @@ public class KeyboardSpec {
     return ks;
   }
 
-  public static KeyboardSpec make3Layer() {
+  public static KeyboardSpec make3Row() {
     KeyboardSpec ks = new KeyboardSpec(24, 84, 32);
     final int w = Color.WHITE;
     final int b = Color.BLACK;
@@ -81,6 +81,37 @@ public class KeyboardSpec {
     return ks;
   }
 
+  public static KeyboardSpec make3RowChromatic() {
+    KeyboardSpec ks = new KeyboardSpec(12, 12, 9);
+    final int w = Color.WHITE;
+    final int b = Color.BLACK;
+    ks.addKey(0, 6, 3, 3, w);   // C
+    ks.addKey(1, 3, 3, 3, b);   // C#
+    ks.addKey(2, 0, 3, 3, w);   // D
+    ks.addKey(3, 6, 3, 3, b);   // D#
+    ks.addKey(4, 3, 3, 3, w);   // E
+    ks.addKey(5, 0, 3, 3, w);   // F
+    ks.addKey(6, 6, 3, 3, b);   // F#
+    ks.addKey(7, 3, 3, 3, w);   // G
+    ks.addKey(8, 0, 3, 3, b);   // G#
+    ks.addKey(9, 6, 3, 3, w);   // A
+    ks.addKey(10, 3, 3, 3, b);  // A#
+    ks.addKey(11, 0, 3, 3, w);  // B
+    return ks;
+  }
+
+  public static KeyboardSpec make(String name) {
+    if ("2row".equals(name)) {
+      return make2Row();
+    } else if ("3row".equals(name)) {
+      return make3Row();
+    } else if ("3chrome".equals(name)) {
+      return make3RowChromatic();
+    } else {
+      return null;
+    }
+  }
+
   public KeySpec keys[];
   public float repeatWidth;
   public float height;

android/src/com/levien/synthesizer/android/widgets/keyboard/KeyboardView.java

@@ -48,7 +48,7 @@ public class KeyboardView extends View {
     paint_.setTextAlign(Paint.Align.CENTER);
     strokeWidth_ = 1.0f * density;
     paint_.setStrokeWidth(strokeWidth_);
-    keyboardSpec_ = KeyboardSpec.make2Layer();
+    keyboardSpec_ = KeyboardSpec.make2Row();
     offset_ = 0.0f;
     zoom_ = 1.0f;
   }