| /* |
| * Copyright (C) 2008 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.launcher2; |
| |
| import android.widget.TextView; |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.RectF; |
| import android.graphics.drawable.Drawable; |
| import android.text.Layout; |
| |
| /** |
| * TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan |
| * because we want to make the bubble taller than the text and TextView's clip is |
| * too aggressive. |
| */ |
| public class BubbleTextView extends TextView { |
| static final float CORNER_RADIUS = 8.0f; |
| static final float PADDING_H = 5.0f; |
| static final float PADDING_V = 1.0f; |
| |
| private final RectF mRect = new RectF(); |
| private Paint mPaint; |
| |
| private boolean mBackgroundSizeChanged; |
| private Drawable mBackground; |
| private float mCornerRadius; |
| private float mPaddingH; |
| private float mPaddingV; |
| |
| public BubbleTextView(Context context) { |
| super(context); |
| init(); |
| } |
| |
| public BubbleTextView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| init(); |
| } |
| |
| public BubbleTextView(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| init(); |
| } |
| |
| private void init() { |
| setFocusable(true); |
| mBackground = getBackground(); |
| setBackgroundDrawable(null); |
| |
| mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| mPaint.setColor(getContext().getResources().getColor(R.color.bubble_dark_background)); |
| |
| final float scale = getContext().getResources().getDisplayMetrics().density; |
| mCornerRadius = CORNER_RADIUS * scale; |
| mPaddingH = PADDING_H * scale; |
| //noinspection PointlessArithmeticExpression |
| mPaddingV = PADDING_V * scale; |
| } |
| |
| @Override |
| protected boolean setFrame(int left, int top, int right, int bottom) { |
| if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { |
| mBackgroundSizeChanged = true; |
| } |
| return super.setFrame(left, top, right, bottom); |
| } |
| |
| @Override |
| protected boolean verifyDrawable(Drawable who) { |
| return who == mBackground || super.verifyDrawable(who); |
| } |
| |
| @Override |
| protected void drawableStateChanged() { |
| Drawable d = mBackground; |
| if (d != null && d.isStateful()) { |
| d.setState(getDrawableState()); |
| } |
| super.drawableStateChanged(); |
| } |
| |
| @Override |
| public void draw(Canvas canvas) { |
| final Drawable background = mBackground; |
| if (background != null) { |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| |
| if (mBackgroundSizeChanged) { |
| background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); |
| mBackgroundSizeChanged = false; |
| } |
| |
| if ((scrollX | scrollY) == 0) { |
| background.draw(canvas); |
| } else { |
| canvas.translate(scrollX, scrollY); |
| background.draw(canvas); |
| canvas.translate(-scrollX, -scrollY); |
| } |
| } |
| |
| final Layout layout = getLayout(); |
| final RectF rect = mRect; |
| final int left = getCompoundPaddingLeft(); |
| final int top = getExtendedPaddingTop(); |
| |
| rect.set(left + layout.getLineLeft(0) - mPaddingH, |
| top + layout.getLineTop(0) - mPaddingV, |
| Math.min(left + layout.getLineRight(0) + mPaddingH, mScrollX + mRight - mLeft), |
| top + layout.getLineBottom(0) + mPaddingV); |
| canvas.drawRoundRect(rect, mCornerRadius, mCornerRadius, mPaint); |
| |
| super.draw(canvas); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| mBackground.setCallback(this); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| mBackground.setCallback(null); |
| } |
| } |