1 /* 2 * Copyright (C) 2010 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.videoeditor.widgets; 18 19 import com.android.videoeditor.R; 20 21 import android.content.Context; 22 import android.content.res.Resources; 23 import android.graphics.Bitmap; 24 import android.graphics.BitmapFactory; 25 import android.graphics.Canvas; 26 import android.graphics.Rect; 27 28 /** 29 * Draw a progress bar for media items, transitions and the audio track 30 */ 31 class ProgressBar { 32 // The one 33 private static ProgressBar mProgressBar; 34 35 // Instance variables 36 private final Bitmap mProgressLeftBitmap; 37 private final Bitmap mProgressRightBitmap; 38 private final Rect mProgressSrcRect; 39 40 /** 41 * Get the progress bar singleton 42 * 43 * @param context The context 44 * 45 * @return The progress bar 46 */ getProgressBar(Context context)47 public static ProgressBar getProgressBar(Context context) { 48 if (mProgressBar == null) { 49 mProgressBar = new ProgressBar(context); 50 } 51 52 return mProgressBar; 53 } 54 55 /** 56 * Constructor 57 * 58 * @param context The context 59 */ ProgressBar(Context context)60 private ProgressBar(Context context) { 61 final Resources resources = context.getResources(); 62 63 // Prepare the progress bitmap 64 mProgressLeftBitmap = BitmapFactory.decodeResource(resources, 65 R.drawable.item_progress_left); 66 mProgressRightBitmap = BitmapFactory.decodeResource(resources, 67 R.drawable.item_progress_right); 68 69 mProgressSrcRect = new Rect(0, 0, mProgressLeftBitmap.getWidth(), 70 mProgressLeftBitmap.getHeight()); 71 } 72 73 /** 74 * @return The height 75 */ getHeight()76 public int getHeight() { 77 return mProgressLeftBitmap.getHeight(); 78 } 79 80 /** 81 * Draw the progress bar 82 * 83 * @param canvas The canvas 84 * @param progress The progress (between 0 and 100) 85 * @param dest The destination rectangle 86 * @param left The left offset 87 * @param width The width 88 */ draw(Canvas canvas, int progress, Rect dest, int left, int width)89 public void draw(Canvas canvas, int progress, Rect dest, int left, int width) { 90 switch (progress) { 91 case 0: { 92 dest.left = left; 93 dest.right = width; 94 canvas.drawBitmap(mProgressRightBitmap, mProgressSrcRect, dest, null); 95 break; 96 } 97 98 case 100: { 99 dest.left = left; 100 dest.right = width; 101 canvas.drawBitmap(mProgressLeftBitmap, mProgressSrcRect, dest, null); 102 break; 103 } 104 105 default: { 106 dest.right = ((width - left) * progress) / 100; 107 108 // Draw progress 109 if (progress > 0) { 110 dest.left = left; 111 canvas.drawBitmap(mProgressLeftBitmap, mProgressSrcRect, dest, null); 112 } 113 114 if (progress < 100) { 115 dest.left = dest.right; 116 dest.right = width; 117 canvas.drawBitmap(mProgressRightBitmap, mProgressSrcRect, dest, null); 118 } 119 120 break; 121 } 122 } 123 } 124 } 125