KeyDrawParams.java revision 71b52a84e2d078d0f57712dba88f8cc691412672 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.inputmethod.keyboard.internal;
18
19import android.content.res.TypedArray;
20import android.graphics.Color;
21import android.graphics.Paint;
22import android.graphics.Rect;
23import android.graphics.Typeface;
24import android.graphics.drawable.Drawable;
25
26import com.android.inputmethod.keyboard.Keyboard;
27import com.android.inputmethod.latin.Constants;
28import com.android.inputmethod.latin.R;
29import com.android.inputmethod.latin.ResourceUtils;
30
31public class KeyDrawParams {
32    // XML attributes
33    public final int mKeyTextColor;
34    public final int mKeyTextInactivatedColor;
35    public final int mKeyTextShadowColor;
36    public final float mKeyTextShadowRadius;
37    public final Drawable mKeyBackground;
38    public final int mKeyHintLetterColor;
39    public final int mKeyHintLabelColor;
40    public final int mKeyShiftedLetterHintInactivatedColor;
41    public final int mKeyShiftedLetterHintActivatedColor;
42
43    private final Typeface mKeyTypefaceFromKeyboardView;
44    private final float mKeyLetterRatio;
45    private final int mKeyLetterSizeFromKeyboardView;
46    private final float mKeyLargeLetterRatio;
47    private final float mKeyLabelRatio;
48    private final float mKeyLargeLabelRatio;
49    private final float mKeyHintLetterRatio;
50    private final float mKeyShiftedLetterHintRatio;
51    private final float mKeyHintLabelRatio;
52
53    public final Rect mPadding = new Rect();
54    public Typeface mKeyTypeface;
55    public int mKeyLetterSize;
56    public int mKeyLargeLetterSize;
57    public int mKeyLabelSize;
58    public int mKeyLargeLabelSize;
59    public int mKeyHintLetterSize;
60    public int mKeyShiftedLetterHintSize;
61    public int mKeyHintLabelSize;
62    public int mAnimAlpha;
63
64    public KeyDrawParams(final TypedArray keyboardViewAttr, final TypedArray keyAttr) {
65        mKeyBackground = keyboardViewAttr.getDrawable(R.styleable.KeyboardView_keyBackground);
66        mKeyBackground.getPadding(mPadding);
67
68        mKeyLetterRatio = ResourceUtils.getFraction(keyAttr,
69                R.styleable.Keyboard_Key_keyLetterSize);
70        mKeyLetterSizeFromKeyboardView = ResourceUtils.getDimensionPixelSize(keyAttr,
71                R.styleable.Keyboard_Key_keyLetterSize);
72        mKeyLabelRatio = ResourceUtils.getFraction(keyAttr,
73                R.styleable.Keyboard_Key_keyLabelSize);
74        mKeyLabelSize = ResourceUtils.getDimensionPixelSize(keyAttr,
75                R.styleable.Keyboard_Key_keyLabelSize);
76        mKeyLargeLabelRatio = ResourceUtils.getFraction(keyAttr,
77                R.styleable.Keyboard_Key_keyLargeLabelRatio);
78        mKeyLargeLetterRatio = ResourceUtils.getFraction(keyAttr,
79                R.styleable.Keyboard_Key_keyLargeLetterRatio);
80        mKeyHintLetterRatio = ResourceUtils.getFraction(keyAttr,
81                R.styleable.Keyboard_Key_keyHintLetterRatio);
82        mKeyShiftedLetterHintRatio = ResourceUtils.getFraction(keyAttr,
83                R.styleable.Keyboard_Key_keyShiftedLetterHintRatio);
84        mKeyHintLabelRatio = ResourceUtils.getFraction(keyAttr,
85                R.styleable.Keyboard_Key_keyHintLabelRatio);
86        mKeyTextColor = keyAttr.getColor(
87                R.styleable.Keyboard_Key_keyTextColor, Color.WHITE);
88        mKeyTextInactivatedColor = keyAttr.getColor(
89                R.styleable.Keyboard_Key_keyTextInactivatedColor, Color.WHITE);
90        mKeyHintLetterColor = keyAttr.getColor(
91                R.styleable.Keyboard_Key_keyHintLetterColor, Color.TRANSPARENT);
92        mKeyHintLabelColor = keyAttr.getColor(
93                R.styleable.Keyboard_Key_keyHintLabelColor, Color.TRANSPARENT);
94        mKeyShiftedLetterHintInactivatedColor = keyAttr.getColor(
95                R.styleable.Keyboard_Key_keyShiftedLetterHintInactivatedColor, Color.TRANSPARENT);
96        mKeyShiftedLetterHintActivatedColor = keyAttr.getColor(
97                R.styleable.Keyboard_Key_keyShiftedLetterHintActivatedColor, Color.TRANSPARENT);
98        mKeyTypefaceFromKeyboardView = Typeface.defaultFromStyle(
99                keyAttr.getInt(R.styleable.Keyboard_Key_keyTypeface, Typeface.NORMAL));
100        mKeyTextShadowColor = keyAttr.getColor(
101                R.styleable.Keyboard_Key_keyTextShadowColor, Color.TRANSPARENT);
102        mKeyTextShadowRadius = keyAttr.getFloat(
103                R.styleable.Keyboard_Key_keyTextShadowRadius, 0f);
104    }
105
106    public void updateParams(final Keyboard keyboard) {
107        mKeyTypeface = (keyboard.mKeyTypeface != null)
108                ? keyboard.mKeyTypeface : mKeyTypefaceFromKeyboardView;
109        final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
110        mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight,
111                mKeyLetterSizeFromKeyboardView, mKeyLetterRatio,
112                mKeyLetterSizeFromKeyboardView);
113        // Override if size/ratio is specified in Keyboard.
114        mKeyLetterSize = selectTextSizeFromDimensionOrRatio(keyHeight, keyboard.mKeyLetterSize,
115                keyboard.mKeyLetterRatio, mKeyLetterSize);
116        if (ResourceUtils.isValidFraction(mKeyLabelRatio)) {
117            mKeyLabelSize = (int)(keyHeight * mKeyLabelRatio);
118        }
119        mKeyLargeLabelSize = (int)(keyHeight * mKeyLargeLabelRatio);
120        mKeyLargeLetterSize = (int)(keyHeight * mKeyLargeLetterRatio);
121        mKeyHintLetterSize = selectTextSizeFromKeyboardOrView(keyHeight,
122                keyboard.mKeyHintLetterRatio, mKeyHintLetterRatio);
123        mKeyShiftedLetterHintSize = selectTextSizeFromKeyboardOrView(keyHeight,
124                keyboard.mKeyShiftedLetterHintRatio, mKeyShiftedLetterHintRatio);
125        mKeyHintLabelSize = (int)(keyHeight * mKeyHintLabelRatio);
126    }
127
128    private static final int selectTextSizeFromDimensionOrRatio(final int keyHeight,
129            final int dimens, final float ratio, final int defaultDimens) {
130        if (ResourceUtils.isValidDimensionPixelSize(dimens)) {
131            return dimens;
132        }
133        if (ResourceUtils.isValidFraction(ratio)) {
134            return (int)(keyHeight * ratio);
135        }
136        return defaultDimens;
137    }
138
139    private static final int selectTextSizeFromKeyboardOrView(final int keyHeight,
140            final float ratioFromKeyboard, final float ratioFromView) {
141        final float ratio = ResourceUtils.isValidFraction(ratioFromKeyboard)
142                ? ratioFromKeyboard : ratioFromView;
143        return (int)(keyHeight * ratio);
144    }
145
146    public void blendAlpha(final Paint paint) {
147        final int color = paint.getColor();
148        paint.setARGB((paint.getAlpha() * mAnimAlpha) / Constants.Color.ALPHA_OPAQUE,
149                Color.red(color), Color.green(color), Color.blue(color));
150    }
151}
152