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Issue 3875: Revert to the old way of determining minimum swipe distance.

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Fix my logic bug when determining left to right vs. right to left.
This commit is contained in:
Andrew Chen 2012-01-03 21:56:20 -08:00
parent 93ecf86806
commit 3c5a63adeb
1 changed files with 8 additions and 8 deletions
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16
src/com/fsck/k9/activity/K9Activity.java
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@ -141,7 +141,6 @@ public class K9Activity extends Activity {
this.gesturesEnabled = gesturesEnabled;
}
private static final float SWIPE_MIN_DISTANCE_DIP = 130.0f;
private static final float SWIPE_MAX_OFF_PATH_DIP = 250f;
private static final float SWIPE_THRESHOLD_VELOCITY_DIP = 325f;
@ -168,20 +167,21 @@ public class K9Activity extends Activity {
// Calculate the minimum distance required for this to count as a swipe.
// Convert the constant dips to pixels.
final float mGestureScale = getResources().getDisplayMetrics().density;
final int minDistance = (int)(SWIPE_MIN_DISTANCE_DIP * mGestureScale + 0.5f);
final int minVelocity = (int)(SWIPE_THRESHOLD_VELOCITY_DIP * mGestureScale + 0.5f);
final int maxOffPath = (int)(SWIPE_MAX_OFF_PATH_DIP * mGestureScale + 0.5f);
// Calculate how much was actually swiped.
final float deltaX = e2.getX() - e1.getX();
final float deltaY = e2.getY() - e1.getY();
// Calculate the minimum distance required for this to be considered a swipe.
final int minDistance = (int)Math.abs(deltaY * 4);
final boolean movedAcross = (Math.abs(deltaX) > Math.abs(deltaY * 4));
final boolean steadyHand = (Math.abs(deltaX / deltaY) > 2);
if(K9.DEBUG) {
Log.d(K9.LOG_TAG, "Old swipe algorithm: movedAcross=" + movedAcross + " steadyHand=" + steadyHand + " result=" + (movedAcross && steadyHand));
final int oldMin = (int)Math.abs(deltaY * 4);
Log.d(K9.LOG_TAG, String.format("New swipe algorithm: deltaX=%.2f deltaY=%.2f velocity=%.2f (min=%d, oldMin=%d)", deltaX, deltaY, velocityX, minVelocity, oldMin));
final boolean movedAcross = (Math.abs(deltaX) > Math.abs(deltaY * 4));
final boolean steadyHand = (Math.abs(deltaX / deltaY) > 2);
Log.d(K9.LOG_TAG, String.format("Old swipe algorithm: movedAcross=%s steadyHand=%s result=%s", movedAcross, steadyHand, movedAcross && steadyHand));
Log.d(K9.LOG_TAG, String.format("New swipe algorithm: deltaX=%.2f deltaY=%.2f minDistance=%d velocity=%.2f (min=%d)", deltaX, deltaY, minDistance, velocityX, minVelocity));
}
try {
@ -196,7 +196,7 @@ public class K9Activity extends Activity {
return false;
}
// right to left swipe
if (deltaX < minDistance) {
if (deltaX < (minDistance * -1)) {
onSwipeRightToLeft(e1, e2);
if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Right to Left swipe OK.");