diff options
Diffstat (limited to 'java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java')
| -rw-r--r-- | java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java b/java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java new file mode 100644 index 000000000..0d5590ec8 --- /dev/null +++ b/java/src/com/android/inputmethod/keyboard/internal/KeyPreviewDrawParams.java @@ -0,0 +1,106 @@ +/* + * 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.latin.R; + +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 Typeface mKeyTextStyle; + public final int mLingerTimeout; + + private final float mPreviewTextRatio; + private final float mKeyLetterRatio; + + // 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 int mPreviewTextSize; + public int mKeyLetterSize; + public final int[] mCoordinates = new int[2]; + + private static final int PREVIEW_ALPHA = 240; + + public KeyPreviewDrawParams(TypedArray a, KeyDrawParams keyDrawParams) { + mPreviewBackground = a.getDrawable(R.styleable.KeyboardView_keyPreviewBackground); + mPreviewLeftBackground = a.getDrawable( + R.styleable.KeyboardView_keyPreviewLeftBackground); + mPreviewRightBackground = a.getDrawable( + R.styleable.KeyboardView_keyPreviewRightBackground); + setAlpha(mPreviewBackground, PREVIEW_ALPHA); + setAlpha(mPreviewLeftBackground, PREVIEW_ALPHA); + setAlpha(mPreviewRightBackground, PREVIEW_ALPHA); + mPreviewOffset = a.getDimensionPixelOffset( + R.styleable.KeyboardView_keyPreviewOffset, 0); + mPreviewHeight = a.getDimensionPixelSize( + R.styleable.KeyboardView_keyPreviewHeight, 80); + mPreviewTextRatio = getRatio(a, R.styleable.KeyboardView_keyPreviewTextRatio); + mPreviewTextColor = a.getColor(R.styleable.KeyboardView_keyPreviewTextColor, 0); + mLingerTimeout = a.getInt(R.styleable.KeyboardView_keyPreviewLingerTimeout, 0); + + mKeyLetterRatio = keyDrawParams.mKeyLetterRatio; + mKeyTextStyle = keyDrawParams.mKeyTextStyle; + } + + public void updateKeyHeight(int keyHeight) { + mPreviewTextSize = (int)(keyHeight * mPreviewTextRatio); + mKeyLetterSize = (int)(keyHeight * mKeyLetterRatio); + } + + private static void setAlpha(Drawable drawable, int alpha) { + if (drawable == null) + return; + drawable.setAlpha(alpha); + } + + // Read fraction value in TypedArray as float. + private static float getRatio(TypedArray a, int index) { + return a.getFraction(index, 1000, 1000, 1) / 1000.0f; + } +}
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