Separate inner classes of KeyboardView out under internal package (49d8af8a) · Commits · e / os / android_packages_inputmethods_LatinIME

java/src/com/android/inputmethod/keyboard/KeyboardView.java

+2 −219

Original line number	Diff line number	Diff line
		@@ -38,12 +38,13 @@ import android.view.View;
		import android.view.ViewGroup;
		import android.widget.TextView;

		import com.android.inputmethod.keyboard.internal.KeyDrawParams;
		import com.android.inputmethod.keyboard.internal.KeyPreviewDrawParams;
		import com.android.inputmethod.keyboard.internal.PreviewPlacerView;
		import com.android.inputmethod.latin.CollectionUtils;
		import com.android.inputmethod.latin.Constants;
		import com.android.inputmethod.latin.LatinImeLogger;
		import com.android.inputmethod.latin.R;
		import com.android.inputmethod.latin.ResourceUtils;
		import com.android.inputmethod.latin.StaticInnerHandlerWrapper;
		import com.android.inputmethod.latin.StringUtils;
		import com.android.inputmethod.latin.define.ProductionFlag;
		@@ -179,224 +180,6 @@ public class KeyboardView extends View implements PointerTracker.DrawingProxy {
		}
		}

		// Move this class to internal package
		protected static class KeyDrawParams {
		// XML attributes
		public final int mKeyTextColor;
		public final int mKeyTextInactivatedColor;
		public final float mKeyLabelHorizontalPadding;
		public final float mKeyHintLetterPadding;
		public final float mKeyPopupHintLetterPadding;
		public final float mKeyShiftedLetterHintPadding;
		public final int mKeyTextShadowColor;
		public final float mKeyTextShadowRadius;
		public final Drawable mKeyBackground;
		public final int mKeyHintLetterColor;
		public final int mKeyHintLabelColor;
		public final int mKeyShiftedLetterHintInactivatedColor;
		public final int mKeyShiftedLetterHintActivatedColor;

		private final Typeface mKeyTypefaceFromKeyboardView;
		private final float mKeyLetterRatio;
		private final int mKeyLetterSizeFromKeyboardView;
		private final float mKeyLargeLetterRatio;
		private final float mKeyLabelRatio;
		private final float mKeyLargeLabelRatio;
		private final float mKeyHintLetterRatio;
		private final float mKeyShiftedLetterHintRatio;
		private final float mKeyHintLabelRatio;

		public final Rect mPadding = new Rect();
		public Typeface mKeyTypeface;
		public int mKeyLetterSize;
		public int mKeyLargeLetterSize;
		public int mKeyLabelSize;
		public int mKeyLargeLabelSize;
		public int mKeyHintLetterSize;
		public int mKeyShiftedLetterHintSize;
		public int mKeyHintLabelSize;
		public int mAnimAlpha;

		public KeyDrawParams(final TypedArray keyboardViewAttr, final TypedArray keyAttr) {
		mKeyBackground = keyboardViewAttr.getDrawable(R.styleable.KeyboardView_keyBackground);
		mKeyBackground.getPadding(mPadding);

		mKeyLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLetterSize);
		mKeyLetterSizeFromKeyboardView = ResourceUtils.getDimensionPixelSize(keyAttr,
		R.styleable.Keyboard_Key_keyLetterSize);
		mKeyLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLabelSize);
		mKeyLabelSize = ResourceUtils.getDimensionPixelSize(keyAttr,
		R.styleable.Keyboard_Key_keyLabelSize);
		mKeyLargeLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLargeLabelRatio);
		mKeyLargeLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLargeLetterRatio);
		mKeyHintLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyHintLetterRatio);
		mKeyShiftedLetterHintRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyShiftedLetterHintRatio);
		mKeyHintLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyHintLabelRatio);
		mKeyLabelHorizontalPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyLabelHorizontalPadding, 0);
		mKeyHintLetterPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyHintLetterPadding, 0);
		mKeyPopupHintLetterPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyPopupHintLetterPadding, 0);
		mKeyShiftedLetterHintPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyShiftedLetterHintPadding, 0);
		mKeyTextColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextColor, Color.WHITE);
		mKeyTextInactivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextInactivatedColor, Color.WHITE);
		mKeyHintLetterColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyHintLetterColor, Color.TRANSPARENT);
		mKeyHintLabelColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyHintLabelColor, Color.TRANSPARENT);
		mKeyShiftedLetterHintInactivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyShiftedLetterHintInactivatedColor,
		Color.TRANSPARENT);
		mKeyShiftedLetterHintActivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyShiftedLetterHintActivatedColor, Color.TRANSPARENT);
		mKeyTypefaceFromKeyboardView = Typeface.defaultFromStyle(
		keyAttr.getInt(R.styleable.Keyboard_Key_keyTypeface, Typeface.NORMAL));
		mKeyTextShadowColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextShadowColor, Color.TRANSPARENT);
		mKeyTextShadowRadius = keyAttr.getFloat(
		R.styleable.Keyboard_Key_keyTextShadowRadius, 0f);
		}

		public void updateParams(final Keyboard keyboard) {
		mKeyTypeface = (keyboard.mKeyTypeface != null)
		? keyboard.mKeyTypeface : mKeyTypefaceFromKeyboardView;
		final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
		mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight,
		mKeyLetterSizeFromKeyboardView, mKeyLetterRatio,
		mKeyLetterSizeFromKeyboardView);
		// Override if size/ratio is specified in Keyboard.
		mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight, keyboard.mKeyLetterSize,
		keyboard.mKeyLetterRatio, mKeyLetterSize);
		if (ResourceUtils.isValidFraction(mKeyLabelRatio)) {
		mKeyLabelSize = (int)(keyHeight * mKeyLabelRatio);
		}
		mKeyLargeLabelSize = (int)(keyHeight * mKeyLargeLabelRatio);
		mKeyLargeLetterSize = (int)(keyHeight * mKeyLargeLetterRatio);
		mKeyHintLetterSize = selectTextSizeFromKeyboardOrView(keyHeight,
		keyboard.mKeyHintLetterRatio, mKeyHintLetterRatio);
		mKeyShiftedLetterHintSize = selectTextSizeFromKeyboardOrView(keyHeight,
		keyboard.mKeyShiftedLetterHintRatio, mKeyShiftedLetterHintRatio);
		mKeyHintLabelSize = (int)(keyHeight * mKeyHintLabelRatio);
		}

		private static final int selectTextSizeFromDimensionOrRatio(final int keyHeight,
		final int dimens, final float ratio, final int defaultDimens) {
		if (ResourceUtils.isValidDimensionPixelSize(dimens)) {
		return dimens;
		}
		if (ResourceUtils.isValidFraction(ratio)) {
		return (int)(keyHeight * ratio);
		}
		return defaultDimens;
		}

		private static final int selectTextSizeFromKeyboardOrView(final int keyHeight,
		final float ratioFromKeyboard, final float ratioFromView) {
		final float ratio = ResourceUtils.isValidFraction(ratioFromKeyboard)
		? ratioFromKeyboard : ratioFromView;
		return (int)(keyHeight * ratio);
		}

		public void blendAlpha(final Paint paint) {
		final int color = paint.getColor();
		paint.setARGB((paint.getAlpha() * mAnimAlpha) / Constants.Color.ALPHA_OPAQUE,
		Color.red(color), Color.green(color), Color.blue(color));
		}
		}

		// TODO: Move this class to internal package.
		/* package */ static class KeyPreviewDrawParams {
		// XML attributes.
		public final Drawable mPreviewBackground;
		public final Drawable mPreviewLeftBackground;
		public final Drawable mPreviewRightBackground;
		public final int mPreviewTextColor;
		public final int mPreviewOffset;
		public final int mPreviewHeight;
		public final int mLingerTimeout;

		private final float mPreviewTextRatio;

		// The graphical geometry of the key preview.
		// <-width->
		// +-------+ ^
		// \| \| \|
		// \|preview\| height (visible)
		// \| \| \|
		// + + ^ v
		// \ / \|offset
		// +-\ /-+ v
		// \| +-+ \|
		// \|parent \|
		// \| key\|
		// +-------+
		// The background of a {@link TextView} being used for a key preview may have invisible
		// paddings. To align the more keys keyboard panel's visible part with the visible part of
		// the background, we need to record the width and height of key preview that don't include
		// invisible paddings.
		public int mPreviewVisibleWidth;
		public int mPreviewVisibleHeight;
		// The key preview may have an arbitrary offset and its background that may have a bottom
		// padding. To align the more keys keyboard and the key preview we also need to record the
		// offset between the top edge of parent key and the bottom of the visible part of key
		// preview background.
		public int mPreviewVisibleOffset;

		public Typeface mKeyTypeface;
		public int mPreviewTextSize;
		public int mKeyLetterSize;
		public final int[] mCoordinates = new int[2];

		private static final int PREVIEW_ALPHA = 240;

		public KeyPreviewDrawParams(final TypedArray keyboardViewAttr, final TypedArray keyAttr) {
		mPreviewBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewBackground);
		mPreviewLeftBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewLeftBackground);
		mPreviewRightBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewRightBackground);
		setAlpha(mPreviewBackground, PREVIEW_ALPHA);
		setAlpha(mPreviewLeftBackground, PREVIEW_ALPHA);
		setAlpha(mPreviewRightBackground, PREVIEW_ALPHA);
		mPreviewOffset = keyboardViewAttr.getDimensionPixelOffset(
		R.styleable.KeyboardView_keyPreviewOffset, 0);
		mPreviewHeight = keyboardViewAttr.getDimensionPixelSize(
		R.styleable.KeyboardView_keyPreviewHeight, 80);
		mLingerTimeout = keyboardViewAttr.getInt(
		R.styleable.KeyboardView_keyPreviewLingerTimeout, 0);

		mPreviewTextRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyPreviewTextRatio);
		mPreviewTextColor = keyAttr.getColor(R.styleable.Keyboard_Key_keyPreviewTextColor, 0);
		}

		public void updateParams(final Keyboard keyboard, final KeyDrawParams keyDrawParams) {
		final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
		if (ResourceUtils.isValidFraction(mPreviewTextRatio)) {
		mPreviewTextSize = (int)(keyHeight * mPreviewTextRatio);
		}
		mKeyLetterSize = keyDrawParams.mKeyLetterSize;
		mKeyTypeface = keyDrawParams.mKeyTypeface;
		}

		private static void setAlpha(final Drawable drawable, final int alpha) {
		if (drawable == null) return;
		drawable.setAlpha(alpha);
		}
		}

		public KeyboardView(Context context, AttributeSet attrs) {
		this(context, attrs, R.attr.keyboardViewStyle);
		}

java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

+1 −0

Original line number	Diff line number	Diff line
		@@ -43,6 +43,7 @@ import com.android.inputmethod.accessibility.AccessibilityUtils;
		import com.android.inputmethod.accessibility.AccessibleKeyboardViewProxy;
		import com.android.inputmethod.keyboard.PointerTracker.DrawingProxy;
		import com.android.inputmethod.keyboard.PointerTracker.TimerProxy;
		import com.android.inputmethod.keyboard.internal.KeyDrawParams;
		import com.android.inputmethod.keyboard.internal.SuddenJumpingTouchEventHandler;
		import com.android.inputmethod.latin.Constants;
		import com.android.inputmethod.latin.LatinIME;

java/src/com/android/inputmethod/keyboard/internal/KeyDrawParams.java

0 → 100644

+163 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2012 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.inputmethod.keyboard.internal;

		import android.content.res.TypedArray;
		import android.graphics.Color;
		import android.graphics.Paint;
		import android.graphics.Rect;
		import android.graphics.Typeface;
		import android.graphics.drawable.Drawable;

		import com.android.inputmethod.keyboard.Keyboard;
		import com.android.inputmethod.latin.Constants;
		import com.android.inputmethod.latin.R;
		import com.android.inputmethod.latin.ResourceUtils;

		public class KeyDrawParams {
		// XML attributes
		public final int mKeyTextColor;
		public final int mKeyTextInactivatedColor;
		public final float mKeyLabelHorizontalPadding;
		public final float mKeyHintLetterPadding;
		public final float mKeyPopupHintLetterPadding;
		public final float mKeyShiftedLetterHintPadding;
		public final int mKeyTextShadowColor;
		public final float mKeyTextShadowRadius;
		public final Drawable mKeyBackground;
		public final int mKeyHintLetterColor;
		public final int mKeyHintLabelColor;
		public final int mKeyShiftedLetterHintInactivatedColor;
		public final int mKeyShiftedLetterHintActivatedColor;

		private final Typeface mKeyTypefaceFromKeyboardView;
		private final float mKeyLetterRatio;
		private final int mKeyLetterSizeFromKeyboardView;
		private final float mKeyLargeLetterRatio;
		private final float mKeyLabelRatio;
		private final float mKeyLargeLabelRatio;
		private final float mKeyHintLetterRatio;
		private final float mKeyShiftedLetterHintRatio;
		private final float mKeyHintLabelRatio;

		public final Rect mPadding = new Rect();
		public Typeface mKeyTypeface;
		public int mKeyLetterSize;
		public int mKeyLargeLetterSize;
		public int mKeyLabelSize;
		public int mKeyLargeLabelSize;
		public int mKeyHintLetterSize;
		public int mKeyShiftedLetterHintSize;
		public int mKeyHintLabelSize;
		public int mAnimAlpha;

		public KeyDrawParams(final TypedArray keyboardViewAttr, final TypedArray keyAttr) {
		mKeyBackground = keyboardViewAttr.getDrawable(R.styleable.KeyboardView_keyBackground);
		mKeyBackground.getPadding(mPadding);

		mKeyLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLetterSize);
		mKeyLetterSizeFromKeyboardView = ResourceUtils.getDimensionPixelSize(keyAttr,
		R.styleable.Keyboard_Key_keyLetterSize);
		mKeyLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLabelSize);
		mKeyLabelSize = ResourceUtils.getDimensionPixelSize(keyAttr,
		R.styleable.Keyboard_Key_keyLabelSize);
		mKeyLargeLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLargeLabelRatio);
		mKeyLargeLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyLargeLetterRatio);
		mKeyHintLetterRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyHintLetterRatio);
		mKeyShiftedLetterHintRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyShiftedLetterHintRatio);
		mKeyHintLabelRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyHintLabelRatio);
		mKeyLabelHorizontalPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyLabelHorizontalPadding, 0);
		mKeyHintLetterPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyHintLetterPadding, 0);
		mKeyPopupHintLetterPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyPopupHintLetterPadding, 0);
		mKeyShiftedLetterHintPadding = keyAttr.getDimension(
		R.styleable.Keyboard_Key_keyShiftedLetterHintPadding, 0);
		mKeyTextColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextColor, Color.WHITE);
		mKeyTextInactivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextInactivatedColor, Color.WHITE);
		mKeyHintLetterColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyHintLetterColor, Color.TRANSPARENT);
		mKeyHintLabelColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyHintLabelColor, Color.TRANSPARENT);
		mKeyShiftedLetterHintInactivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyShiftedLetterHintInactivatedColor, Color.TRANSPARENT);
		mKeyShiftedLetterHintActivatedColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyShiftedLetterHintActivatedColor, Color.TRANSPARENT);
		mKeyTypefaceFromKeyboardView = Typeface.defaultFromStyle(
		keyAttr.getInt(R.styleable.Keyboard_Key_keyTypeface, Typeface.NORMAL));
		mKeyTextShadowColor = keyAttr.getColor(
		R.styleable.Keyboard_Key_keyTextShadowColor, Color.TRANSPARENT);
		mKeyTextShadowRadius = keyAttr.getFloat(
		R.styleable.Keyboard_Key_keyTextShadowRadius, 0f);
		}

		public void updateParams(final Keyboard keyboard) {
		mKeyTypeface = (keyboard.mKeyTypeface != null)
		? keyboard.mKeyTypeface : mKeyTypefaceFromKeyboardView;
		final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
		mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight,
		mKeyLetterSizeFromKeyboardView, mKeyLetterRatio,
		mKeyLetterSizeFromKeyboardView);
		// Override if size/ratio is specified in Keyboard.
		mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight, keyboard.mKeyLetterSize,
		keyboard.mKeyLetterRatio, mKeyLetterSize);
		if (ResourceUtils.isValidFraction(mKeyLabelRatio)) {
		mKeyLabelSize = (int)(keyHeight * mKeyLabelRatio);
		}
		mKeyLargeLabelSize = (int)(keyHeight * mKeyLargeLabelRatio);
		mKeyLargeLetterSize = (int)(keyHeight * mKeyLargeLetterRatio);
		mKeyHintLetterSize = selectTextSizeFromKeyboardOrView(keyHeight,
		keyboard.mKeyHintLetterRatio, mKeyHintLetterRatio);
		mKeyShiftedLetterHintSize = selectTextSizeFromKeyboardOrView(keyHeight,
		keyboard.mKeyShiftedLetterHintRatio, mKeyShiftedLetterHintRatio);
		mKeyHintLabelSize = (int)(keyHeight * mKeyHintLabelRatio);
		}

		private static final int selectTextSizeFromDimensionOrRatio(final int keyHeight,
		final int dimens, final float ratio, final int defaultDimens) {
		if (ResourceUtils.isValidDimensionPixelSize(dimens)) {
		return dimens;
		}
		if (ResourceUtils.isValidFraction(ratio)) {
		return (int)(keyHeight * ratio);
		}
		return defaultDimens;
		}

		private static final int selectTextSizeFromKeyboardOrView(final int keyHeight,
		final float ratioFromKeyboard, final float ratioFromView) {
		final float ratio = ResourceUtils.isValidFraction(ratioFromKeyboard)
		? ratioFromKeyboard : ratioFromView;
		return (int)(keyHeight * ratio);
		}

		public void blendAlpha(final Paint paint) {
		final int color = paint.getColor();
		paint.setARGB((paint.getAlpha() * mAnimAlpha) / Constants.Color.ALPHA_OPAQUE,
		Color.red(color), Color.green(color), Color.blue(color));
		}
		}

java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java

0 → 100644

+106 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2012 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.inputmethod.keyboard.internal;

		import android.content.res.TypedArray;
		import android.graphics.Typeface;
		import android.graphics.drawable.Drawable;

		import com.android.inputmethod.keyboard.Keyboard;
		import com.android.inputmethod.latin.R;
		import com.android.inputmethod.latin.ResourceUtils;

		public class KeyPreviewDrawParams {
		// XML attributes.
		public final Drawable mPreviewBackground;
		public final Drawable mPreviewLeftBackground;
		public final Drawable mPreviewRightBackground;
		public final int mPreviewTextColor;
		public final int mPreviewOffset;
		public final int mPreviewHeight;
		public final int mLingerTimeout;

		private final float mPreviewTextRatio;

		// The graphical geometry of the key preview.
		// <-width->
		// +-------+ ^
		// \| \| \|
		// \|preview\| height (visible)
		// \| \| \|
		// + + ^ v
		// \ / \|offset
		// +-\ /-+ v
		// \| +-+ \|
		// \|parent \|
		// \| key\|
		// +-------+
		// The background of a {@link TextView} being used for a key preview may have invisible
		// paddings. To align the more keys keyboard panel's visible part with the visible part of
		// the background, we need to record the width and height of key preview that don't include
		// invisible paddings.
		public int mPreviewVisibleWidth;
		public int mPreviewVisibleHeight;
		// The key preview may have an arbitrary offset and its background that may have a bottom
		// padding. To align the more keys keyboard and the key preview we also need to record the
		// offset between the top edge of parent key and the bottom of the visible part of key
		// preview background.
		public int mPreviewVisibleOffset;

		public Typeface mKeyTypeface;
		public int mPreviewTextSize;
		public int mKeyLetterSize;
		public final int[] mCoordinates = new int[2];

		private static final int PREVIEW_ALPHA = 240;

		public KeyPreviewDrawParams(final TypedArray keyboardViewAttr, final TypedArray keyAttr) {
		mPreviewBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewBackground);
		mPreviewLeftBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewLeftBackground);
		mPreviewRightBackground = keyboardViewAttr.getDrawable(
		R.styleable.KeyboardView_keyPreviewRightBackground);
		setAlpha(mPreviewBackground, PREVIEW_ALPHA);
		setAlpha(mPreviewLeftBackground, PREVIEW_ALPHA);
		setAlpha(mPreviewRightBackground, PREVIEW_ALPHA);
		mPreviewOffset = keyboardViewAttr.getDimensionPixelOffset(
		R.styleable.KeyboardView_keyPreviewOffset, 0);
		mPreviewHeight = keyboardViewAttr.getDimensionPixelSize(
		R.styleable.KeyboardView_keyPreviewHeight, 80);
		mLingerTimeout = keyboardViewAttr.getInt(
		R.styleable.KeyboardView_keyPreviewLingerTimeout, 0);

		mPreviewTextRatio = ResourceUtils.getFraction(keyAttr,
		R.styleable.Keyboard_Key_keyPreviewTextRatio);
		mPreviewTextColor = keyAttr.getColor(R.styleable.Keyboard_Key_keyPreviewTextColor, 0);
		}

		public void updateParams(final Keyboard keyboard, final KeyDrawParams keyDrawParams) {
		final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
		if (ResourceUtils.isValidFraction(mPreviewTextRatio)) {
		mPreviewTextSize = (int)(keyHeight * mPreviewTextRatio);
		}
		mKeyLetterSize = keyDrawParams.mKeyLetterSize;
		mKeyTypeface = keyDrawParams.mKeyTypeface;
		}

		private static void setAlpha(final Drawable drawable, final int alpha) {
		if (drawable == null) return;
		drawable.setAlpha(alpha);
		}
		}