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Code Issues Releases Wiki Activity

Issue 3875: Add more debugging lines to figure out what might be wrong with the new swipe algorithm.

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Fix some variable names.
This commit is contained in:
Andrew Chen 2012-01-03 20:32:05 -08:00
parent 81f0cb510a
commit fc5ea05e48
1 changed files with 35 additions and 7 deletions
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42
src/com/fsck/k9/activity/K9Activity.java
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@ -7,6 +7,7 @@ import android.app.Activity;
import android.content.Context; import android.content.Context;
import android.content.res.Configuration; import android.content.res.Configuration;
import android.os.Bundle; import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector; import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener; import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent; import android.view.MotionEvent;
@ -164,21 +165,48 @@ public class K9Activity extends Activity {
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
// Do fling-detection if gestures are force-enabled or we have system-wide gestures enabled. // Do fling-detection if gestures are force-enabled or we have system-wide gestures enabled.
if (gesturesEnabled || K9.gesturesEnabled()) { if (gesturesEnabled || K9.gesturesEnabled()) {
// Convert the dips to pixels // 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 float mGestureScale = getResources().getDisplayMetrics().density;
int min_distance = (int)(SWIPE_MIN_DISTANCE_DIP * mGestureScale + 0.5f); final int minDistance = (int)(SWIPE_MIN_DISTANCE_DIP * mGestureScale + 0.5f);
int min_velocity = (int)(SWIPE_THRESHOLD_VELOCITY_DIP * mGestureScale + 0.5f); final int minVelocity = (int)(SWIPE_THRESHOLD_VELOCITY_DIP * mGestureScale + 0.5f);
int max_off_path = (int)(SWIPE_MAX_OFF_PATH_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();
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));
Log.d(K9.LOG_TAG, String.format("New swipe algorithm: deltaX=%.2f deltaY=%.2f velocity=%.2f (min=%d)", deltaX, deltaY, velocityX, minVelocity));
}
try { try {
if (Math.abs(e1.getY() - e2.getY()) > max_off_path) if (Math.abs(deltaY) > maxOffPath) {
if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe too far off horizontal path.");
return false; return false;
}
if(Math.abs(velocityX) < minVelocity) {
if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe too slow.");
return false;
}
// right to left swipe // right to left swipe
if (e1.getX() - e2.getX() > min_distance && Math.abs(velocityX) > min_velocity) { if (deltaX < minDistance) {
onSwipeRightToLeft(e1, e2); onSwipeRightToLeft(e1, e2);
} else if (e2.getX() - e1.getX() > min_distance && Math.abs(velocityX) > min_velocity) { if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Right to Left swipe OK.");
} else if (deltaX > minDistance) {
onSwipeLeftToRight(e1, e2); onSwipeLeftToRight(e1, e2);
if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Left to Right swipe OK.");
} else {
if(K9.DEBUG)
Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe did not meet minimum distance requirements.");
return false;
} }
} catch (Exception e) { } catch (Exception e) {
// nothing // nothing