1 /* 2 * Copyright (C) 2008 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.camera; 18 19 import com.android.gallery.R; 20 21 import android.content.Context; 22 import android.graphics.Canvas; 23 import android.graphics.Paint; 24 import android.graphics.RectF; 25 import android.text.Layout; 26 import android.util.AttributeSet; 27 import android.widget.TextView; 28 29 /** 30 * TextView that draws a bubble behind the text. We cannot use a 31 * LineBackgroundSpan because we want to make the bubble taller than the text 32 * and TextView's clip is too aggressive. 33 */ 34 public class ActionMenuButton extends TextView { 35 private static final int CORNER_RADIUS = 8; 36 private static final int PADDING_H = 5; 37 private static final int PADDING_V = 1; 38 39 private final RectF mRect = new RectF(); 40 private Paint mPaint; 41 ActionMenuButton(Context context)42 public ActionMenuButton(Context context) { 43 super(context); 44 init(); 45 } 46 ActionMenuButton(Context context, AttributeSet attrs)47 public ActionMenuButton(Context context, AttributeSet attrs) { 48 super(context, attrs); 49 init(); 50 } 51 ActionMenuButton(Context context, AttributeSet attrs, int defStyle)52 public ActionMenuButton(Context context, AttributeSet attrs, int defStyle) { 53 super(context, attrs, defStyle); 54 init(); 55 } 56 init()57 private void init() { 58 setFocusable(true); 59 // We need extra padding below to prevent the bubble being cut. 60 setPadding(PADDING_H, 0, PADDING_H, PADDING_V); 61 62 mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 63 mPaint.setColor(getContext().getResources() 64 .getColor(R.color.bubble_dark_background)); 65 } 66 67 @Override drawableStateChanged()68 protected void drawableStateChanged() { 69 invalidate(); 70 super.drawableStateChanged(); 71 } 72 73 @Override draw(Canvas canvas)74 public void draw(Canvas canvas) { 75 final Layout layout = getLayout(); 76 final RectF rect = mRect; 77 final int left = getCompoundPaddingLeft(); 78 final int top = getExtendedPaddingTop(); 79 80 rect.set(left + layout.getLineLeft(0) - PADDING_H, 81 top + layout.getLineTop(0) - PADDING_V, 82 Math.min(left + layout.getLineRight(0) + PADDING_H, 83 mScrollX + mRight - mLeft), 84 top + layout.getLineBottom(0) + PADDING_V); 85 canvas.drawRoundRect(rect, CORNER_RADIUS, CORNER_RADIUS, mPaint); 86 87 super.draw(canvas); 88 } 89 } 90