1 package org.robolectric.shadows; 2 3 import android.widget.Scroller; 4 import org.robolectric.annotation.Implementation; 5 import org.robolectric.annotation.Implements; 6 7 @Implements(Scroller.class) 8 public class ShadowScroller { 9 private int startX; 10 private int startY; 11 private int finalX; 12 private int finalY; 13 private long startTime; 14 private long duration; 15 private boolean started; 16 17 @Implementation 18 public int getStartX() { 19 return startX; 20 } 21 22 @Implementation 23 public int getStartY() { 24 return startY; 25 } 26 27 @Implementation 28 public int getCurrX() { 29 long dt = deltaTime(); 30 return dt >= duration ? finalX : startX + (int) ((deltaX() * dt) / duration); 31 } 32 33 @Implementation 34 public int getCurrY() { 35 long dt = deltaTime(); 36 return dt >= duration ? finalY : startY + (int) ((deltaY() * dt) / duration); 37 } 38 39 @Implementation 40 public int getFinalX() { 41 return finalX; 42 } 43 44 @Implementation 45 public int getFinalY() { 46 return finalY; 47 } 48 49 @Implementation 50 public int getDuration() { 51 return (int) duration; 52 } 53 54 @Implementation 55 public void startScroll(int startX, int startY, int dx, int dy, int duration) { 56 this.startX = startX; 57 this.startY = startY; 58 finalX = startX + dx; 59 finalY = startY + dy; 60 startTime = ShadowApplication.getInstance().getForegroundThreadScheduler().getCurrentTime(); 61 this.duration = duration; 62 started = true; 63 // enque a dummy task so that the scheduler will actually run 64 ShadowApplication.getInstance().getForegroundThreadScheduler().postDelayed(new Runnable() { 65 @Override 66 public void run() { 67 // do nothing 68 } 69 }, duration); 70 } 71 72 @Implementation 73 public boolean computeScrollOffset() { 74 if (!started) { 75 return false; 76 } 77 started &= deltaTime() < duration; 78 return true; 79 } 80 81 @Implementation 82 public boolean isFinished() { 83 return deltaTime() > duration; 84 } 85 86 @Implementation 87 public int timePassed() { 88 return (int) deltaTime(); 89 } 90 91 private long deltaTime() { 92 return ShadowApplication.getInstance().getForegroundThreadScheduler().getCurrentTime() - startTime; 93 } 94 95 private int deltaX() { 96 return (finalX - startX); 97 } 98 99 private int deltaY() { 100 return (finalY - startY); 101 } 102 } 103
