Michael Chan | 99704a2 | 2011-11-11 10:24:37 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | |
| 17 | package com.android.calendar; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.graphics.drawable.Drawable; |
| 21 | import android.util.AttributeSet; |
| 22 | import android.view.View; |
| 23 | import android.view.View.OnClickListener; |
| 24 | import android.widget.ImageButton; |
| 25 | import android.widget.LinearLayout; |
| 26 | import android.widget.TextView; |
| 27 | |
| 28 | public class ExpandableTextView extends LinearLayout implements OnClickListener { |
| 29 | |
| 30 | TextView mTv; |
| 31 | ImageButton mButton; // Button to expand/collapse |
| 32 | |
| 33 | private boolean mRelayout = false; |
| 34 | private boolean mCollapsed = true; // Show short version as default. |
| 35 | private int mMaxCollapsedLines = 8; // The default number of lines; |
| 36 | private Drawable mExpandDrawable; |
| 37 | private Drawable mCollapseDrawable; |
| 38 | |
| 39 | public ExpandableTextView(Context context) { |
| 40 | super(context); |
| 41 | init(); |
| 42 | } |
| 43 | |
| 44 | public ExpandableTextView(Context context, AttributeSet attrs) { |
| 45 | super(context, attrs, 0); |
| 46 | init(); |
| 47 | } |
| 48 | |
| 49 | public ExpandableTextView(Context context, AttributeSet attrs, int defStyle) { |
| 50 | super(context, attrs, defStyle); |
| 51 | init(); |
| 52 | } |
| 53 | |
| 54 | void init() { |
| 55 | mMaxCollapsedLines = getResources().getInteger((R.integer.event_info_desc_line_num)); |
| 56 | mExpandDrawable = getResources().getDrawable(R.drawable.ic_expand_small_holo_light); |
| 57 | mCollapseDrawable = getResources().getDrawable(R.drawable.ic_collapse_small_holo_light); |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public void onClick(View v) { |
| 62 | if (mButton.getVisibility() != View.VISIBLE) { |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | mCollapsed = !mCollapsed; |
| 67 | mButton.setImageDrawable(mCollapsed ? mExpandDrawable : mCollapseDrawable); |
| 68 | mTv.setMaxLines(mCollapsed ? mMaxCollapsedLines : Integer.MAX_VALUE); |
| 69 | } |
| 70 | |
| 71 | @Override |
| 72 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 73 | // If no change, measure and return |
| 74 | if (!mRelayout || getVisibility() == View.GONE) { |
| 75 | super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| 76 | return; |
| 77 | } |
| 78 | mRelayout = false; |
| 79 | |
| 80 | // Setup with optimistic case |
| 81 | // i.e. Everything fits. No button needed |
| 82 | mButton.setVisibility(View.GONE); |
| 83 | mTv.setMaxLines(Integer.MAX_VALUE); |
| 84 | |
| 85 | // Measure |
| 86 | super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| 87 | |
| 88 | // If the text fits in collapsed mode, we are done. |
| 89 | if (mTv.getLineCount() <= mMaxCollapsedLines) { |
| 90 | return; |
| 91 | } |
| 92 | |
| 93 | // Doesn't fit in collapsed mode. Collapse text view as needed. Show |
| 94 | // button. |
| 95 | if (mCollapsed) { |
| 96 | mTv.setMaxLines(mMaxCollapsedLines); |
| 97 | } |
| 98 | mButton.setVisibility(View.VISIBLE); |
| 99 | |
| 100 | // Re-measure with new setup |
| 101 | super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| 102 | } |
| 103 | |
| 104 | private void findViews() { |
| 105 | mTv = (TextView) findViewById(R.id.expandable_text); |
| 106 | mTv.setOnClickListener(this); |
| 107 | mButton = (ImageButton) findViewById(R.id.expand_collapse); |
| 108 | mButton.setOnClickListener(this); |
| 109 | } |
| 110 | |
| 111 | public void setText(String text) { |
| 112 | mRelayout = true; |
| 113 | if (mTv == null) { |
| 114 | findViews(); |
| 115 | } |
| 116 | String trimmedText = text.trim(); |
| 117 | mTv.setText(trimmedText); |
| 118 | this.setVisibility(trimmedText.length() == 0 ? View.GONE : View.VISIBLE); |
| 119 | } |
| 120 | |
| 121 | public CharSequence getText() { |
Michael Chan | 3389397 | 2011-11-16 12:45:53 -0800 | [diff] [blame] | 122 | if (mTv == null) { |
| 123 | return ""; |
| 124 | } |
Michael Chan | 99704a2 | 2011-11-11 10:24:37 -0800 | [diff] [blame] | 125 | return mTv.getText(); |
| 126 | } |
| 127 | } |