DialogTitle.java revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087 
1/*
2 * Copyright (C) 2008 Google Inc.
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.internal.widget;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.text.Layout;
22import android.util.AttributeSet;
23import android.util.TypedValue;
24import android.widget.TextView;
25
26/**
27 * Used by dialogs to change the font size and number of lines to try to fit
28 * the text to the available space.
29 */
30public class DialogTitle extends TextView {
31
32    public DialogTitle(Context context, AttributeSet attrs,
33            int defStyle) {
34        super(context, attrs, defStyle);
35    }
36
37    public DialogTitle(Context context, AttributeSet attrs) {
38        super(context, attrs);
39    }
40
41    public DialogTitle(Context context) {
42        super(context);
43    }
44
45    @Override
46    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
47        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
48
49        final Layout layout = getLayout();
50        if (layout != null) {
51            final int lineCount = layout.getLineCount();
52            if (lineCount > 0) {
53                final int ellipsisCount = layout.getEllipsisCount(lineCount - 1);
54                if (ellipsisCount > 0) {
55                    setSingleLine(false);
56
57                    TypedArray a = mContext.obtainStyledAttributes(
58                            android.R.style.TextAppearance_Medium,
59                            android.R.styleable.TextAppearance);
60                    final int textSize = a.getDimensionPixelSize(
61                            android.R.styleable.TextAppearance_textSize, 20);
62
63                    setTextSize(TypedValue.COMPLEX_UNIT_SP, textSize);
64                    setMaxLines(2);
65                    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
66                }
67            }
68        }
69    }
70
71}