DO NOT MERGE. Add visual indicator that long press , or mic key will bring up Settings

bug:3084022
Change-Id: I8b38e2803eb32469653484701882af35108eb69a

java/src/com/android/inputmethod/latin/LatinKeyboard.java

@@ -61,6 +61,7 @@ public class LatinKeyboard extends Keyboard {
     private Key mShiftKey;
     private Key mEnterKey;
     private Key mF1Key;
+    private Drawable mF1HintIcon;
     private Key mSpaceKey;
     private Key m123Key;
     private final int NUMBER_HINT_COUNT = 10;
@@ -135,6 +136,7 @@ public class LatinKeyboard extends Keyboard {
         mButtonArrowRightIcon = res.getDrawable(R.drawable.sym_keyboard_language_arrows_right);
         m123MicIcon = res.getDrawable(R.drawable.sym_keyboard_123_mic);
         m123MicPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_123_mic);
+        mF1HintIcon = res.getDrawable(R.drawable.hint_settings);
         setDefaultBounds(m123MicPreviewIcon);
         sSpacebarVerticalCorrection = res.getDimensionPixelOffset(
                 R.dimen.spacebar_vertical_correction);
@@ -368,13 +370,18 @@ public class LatinKeyboard extends Keyboard {
         if (mHasVoiceButton && mVoiceEnabled) {
             mF1Key.codes = new int[] { LatinKeyboardView.KEYCODE_VOICE };
             mF1Key.label = null;
-            mF1Key.icon = mMicIcon;
+            // HACK: draw mMicIcon and mF1HintIcon at the same time
+            mF1Key.icon = new BitmapDrawable(mRes, drawSynthesizedSettingsHintImage(
+                    mF1Key.width, mF1Key.height + mVerticalGap, mMicIcon, mF1HintIcon));
             mF1Key.iconPreview = mMicPreviewIcon;
             mF1Key.popupResId = R.xml.popup_mic;
         } else {
             mF1Key.label = ",";
             mF1Key.codes = new int[] { ',' };
-            mF1Key.icon = null;
+            // HACK: draw only mF1HintIcon on offscreen buffer to adjust position of '...' to the
+            // above synthesized icon
+            mF1Key.icon = new BitmapDrawable(mRes, drawSynthesizedSettingsHintImage(
+                    mF1Key.width, mF1Key.height + mVerticalGap, null, mF1HintIcon));
             mF1Key.iconPreview = null;
             mF1Key.popupResId = R.xml.popup_comma;
         }
@@ -424,6 +431,29 @@ public class LatinKeyboard extends Keyboard {
         return bounds.width();
     }
 
+    // Overlay two images.  Note that mainIcon can be null.
+    private Bitmap drawSynthesizedSettingsHintImage(
+            int width, int height, Drawable mainIcon, Drawable hintIcon) {
+        if (hintIcon == null)
+            return null;
+        final Bitmap buffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+        final Canvas canvas = new Canvas(buffer);
+        canvas.drawColor(mRes.getColor(R.color.latinkeyboard_transparent), PorterDuff.Mode.CLEAR);
+        // draw main icon at centered position
+        if (mainIcon != null) {
+            setDefaultBounds(mainIcon);
+            final int drawableX = (width - mainIcon.getIntrinsicWidth()) / 2;
+            final int drawableY = (height - mainIcon.getIntrinsicHeight()) / 2;
+            canvas.translate(drawableX, drawableY);
+            mainIcon.draw(canvas);
+            canvas.translate(-drawableX, -drawableY);
+        }
+        // draw hint icon fully in the key
+        hintIcon.setBounds(0, 0, width, height);
+        hintIcon.draw(canvas);
+        return buffer;
+    }
+
     // Layout local language name and left and right arrow on space bar.
     private static String layoutSpaceBar(Paint paint, Locale locale, Drawable lArrow,
             Drawable rArrow, int width, int height, float origTextSize,

java/src/com/android/inputmethod/latin/LatinKeyboardBaseView.java

@@ -847,7 +847,7 @@ public class LatinKeyboardBaseView extends View implements PointerTracker.UIProx
 
                 // Usually don't draw icon if label is not null, but we draw icon for the number
                 // hint.
-                shouldDrawIcon = isNumberAtEdgeOfPopupChars(key);
+                shouldDrawIcon = isCommaKeyLabelOrNumberAtEdgeOfPopupChars(key);
             }
             if (key.icon != null && shouldDrawIcon) {
                 // Special handing for the upper-right number hint icons
@@ -940,7 +940,7 @@ public class LatinKeyboardBaseView extends View implements PointerTracker.UIProx
         if (key == null)
             return;
         // Should not draw number hint icons
-        if (key.icon != null && !isNumberAtEdgeOfPopupChars(key)) {
+        if (key.icon != null && !isCommaKeyLabelOrNumberAtEdgeOfPopupChars(key)) {
             mPreviewText.setCompoundDrawables(null, null, null,
                     key.iconPreview != null ? key.iconPreview : key.icon);
             mPreviewText.setText(null);
@@ -1221,6 +1221,14 @@ public class LatinKeyboardBaseView extends View implements PointerTracker.UIProx
         return false;
     }
 
+    private static boolean isCommaKeyLabelOrNumberAtEdgeOfPopupChars(Key key) {
+        return isNumberAtEdgeOfPopupChars(key) || isCommaKeyLabel(key);
+    }
+
+    private static boolean isCommaKeyLabel(Key key) {
+        return ",".equals(key.label);
+    }
+
     private static boolean isNumberAtEdgeOfPopupChars(Key key) {
         return isNumberAtLeftmostPopupChar(key) || isNumberAtRightmostPopupChar(key);
     }