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implement MotionView.eventTime and VelocityTracker

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This is needed to make androidx ViewPager work with touch input
This commit is contained in:
Julian Winkler
2024-02-25 17:41:26 +01:00
parent 8dafa41ea9
commit bcf252d3a6
6 changed files with 52 additions and 19 deletions
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31
src/api-impl/android/view/VelocityTracker.java
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@@ -6,15 +6,40 @@ public class VelocityTracker {
return new VelocityTracker();
}
public void addMovement(MotionEvent event) {}
private float startX;
private float startY;
private long startEventTime;
private float currentX;
private float currentY;
private long currentEventTime;
public void addMovement(MotionEvent event) {
if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
startX = currentX = event.getX();
startY = currentY = event.getY();
startEventTime = currentEventTime = event.getEventTime();
} else {
currentX = event.getX();
currentY = event.getY();
currentEventTime = event.getEventTime();
}
}
public void recycle() {}
public void computeCurrentVelocity(int units, float maxVelocity) {}
public void computeCurrentVelocity(int units) {}
public float getXVelocity(int id) {return 0.f;}
public float getYVelocity(int id) {return 0.f;}
public float getXVelocity(int id) {
if (currentEventTime == startEventTime)
return 0.f;
return (currentX - startX) / (currentEventTime - startEventTime) * 1000;
}
public float getYVelocity(int id) {
if (currentEventTime == startEventTime)
return 0.f;
return (currentY - startY) / (currentEventTime - startEventTime) * 1000;
}
public void clear() {}
}