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.camera.drawable;
18
19import android.content.res.Resources;
20import android.graphics.Canvas;
21import android.graphics.Color;
22import android.graphics.ColorFilter;
23import android.graphics.Paint;
24import android.graphics.Paint.Align;
25import android.graphics.Rect;
26import android.graphics.drawable.Drawable;
27import android.util.TypedValue;
28
29
30public class TextDrawable extends Drawable {
31
32    private static final int DEFAULT_COLOR = Color.WHITE;
33    private static final int DEFAULT_TEXTSIZE = 15;
34
35    private Paint mPaint;
36    private CharSequence mText;
37    private int mIntrinsicWidth;
38    private int mIntrinsicHeight;
39
40    public TextDrawable(Resources res, CharSequence text) {
41        mText = text;
42        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
43        mPaint.setColor(DEFAULT_COLOR);
44        mPaint.setTextAlign(Align.CENTER);
45        float textSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
46                DEFAULT_TEXTSIZE, res.getDisplayMetrics());
47        mPaint.setTextSize(textSize);
48        mIntrinsicWidth = (int) (mPaint.measureText(mText, 0, mText.length()) + .5);
49        mIntrinsicHeight = mPaint.getFontMetricsInt(null);
50    }
51
52    @Override
53    public void draw(Canvas canvas) {
54        Rect bounds = getBounds();
55        canvas.drawText(mText, 0, mText.length(),
56                bounds.centerX(), bounds.centerY(), mPaint);
57    }
58
59    @Override
60    public int getOpacity() {
61        return mPaint.getAlpha();
62    }
63
64    @Override
65    public int getIntrinsicWidth() {
66        return mIntrinsicWidth;
67    }
68
69    @Override
70    public int getIntrinsicHeight() {
71        return mIntrinsicHeight;
72    }
73
74    @Override
75    public void setAlpha(int alpha) {
76        mPaint.setAlpha(alpha);
77    }
78
79    @Override
80    public void setColorFilter(ColorFilter filter) {
81        mPaint.setColorFilter(filter);
82    }
83
84}
85