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/*
* Copyright (C) 2011 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.calendar;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
public class ExpandableTextView extends LinearLayout implements OnClickListener {
TextView mTv;
ImageButton mButton; // Button to expand/collapse
private boolean mRelayout = false;
private boolean mCollapsed = true; // Show short version as default.
private int mMaxCollapsedLines = 8; // The default number of lines;
private Drawable mExpandDrawable;
private Drawable mCollapseDrawable;
public ExpandableTextView(Context context) {
super(context);
init();
}
public ExpandableTextView(Context context, AttributeSet attrs) {
super(context, attrs, 0);
init();
}
public ExpandableTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
void init() {
mMaxCollapsedLines = getResources().getInteger((R.integer.event_info_desc_line_num));
mExpandDrawable = getResources().getDrawable(R.drawable.ic_expand_small_holo_light);
mCollapseDrawable = getResources().getDrawable(R.drawable.ic_collapse_small_holo_light);
}
@Override
public void onClick(View v) {
if (mButton.getVisibility() != View.VISIBLE) {
return;
}
mCollapsed = !mCollapsed;
mButton.setImageDrawable(mCollapsed ? mExpandDrawable : mCollapseDrawable);
mTv.setMaxLines(mCollapsed ? mMaxCollapsedLines : Integer.MAX_VALUE);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// If no change, measure and return
if (!mRelayout || getVisibility() == View.GONE) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
return;
}
mRelayout = false;
// Setup with optimistic case
// i.e. Everything fits. No button needed
mButton.setVisibility(View.GONE);
mTv.setMaxLines(Integer.MAX_VALUE);
// Measure
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// If the text fits in collapsed mode, we are done.
if (mTv.getLineCount() <= mMaxCollapsedLines) {
return;
}
// Doesn't fit in collapsed mode. Collapse text view as needed. Show
// button.
if (mCollapsed) {
mTv.setMaxLines(mMaxCollapsedLines);
}
mButton.setVisibility(View.VISIBLE);
// Re-measure with new setup
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void findViews() {
mTv = (TextView) findViewById(R.id.expandable_text);
mTv.setOnClickListener(this);
mButton = (ImageButton) findViewById(R.id.expand_collapse);
mButton.setOnClickListener(this);
}
public void setText(String text) {
mRelayout = true;
if (mTv == null) {
findViews();
}
String trimmedText = text.trim();
mTv.setText(trimmedText);
this.setVisibility(trimmedText.length() == 0 ? View.GONE : View.VISIBLE);
}
public CharSequence getText() {
if (mTv == null) {
return "";
}
return mTv.getText();
}
}
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