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      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      */
     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      */
     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      */
     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      */
     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