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correctly set starting alpha for gesture trail

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Helium314 2024-01-23 16:25:36 +01:00
parent cb0cc4e65a
commit f699d16d10
1 changed files with 5 additions and 5 deletions
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10
app/src/main/java/org/dslul/openboard/inputmethod/keyboard/internal/GestureTrailDrawingPoints.java
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@ -13,13 +13,12 @@ import android.graphics.Path;
import android.graphics.Rect;
import android.os.SystemClock;
import org.dslul.openboard.inputmethod.latin.common.Constants;
import org.dslul.openboard.inputmethod.latin.common.ResizableIntArray;
/**
* This class holds drawing points to represent a gesture trail. The gesture trail may contain
* multiple non-contiguous gesture strokes and will be animated asynchronously from gesture input.
*
* <p>
* On the other hand, {@link GestureStrokeDrawingPoints} class holds drawing points of each gesture
* stroke. This class holds drawing points of those gesture strokes to draw as a gesture trail.
* Drawing points in this class will be asynchronously removed when fading out animation goes.
@ -109,13 +108,14 @@ final class GestureTrailDrawingPoints {
* @return the width of a gesture trail
*/
private static int getAlpha(final int elapsedTime, final GestureTrailDrawingParams params) {
final int fullAlpha = Color.alpha(params.mTrailColor);
if (elapsedTime < params.mFadeoutStartDelay) {
return Constants.Color.ALPHA_OPAQUE;
return fullAlpha;
}
final int decreasingAlpha = Constants.Color.ALPHA_OPAQUE
final int decreasingAlpha = fullAlpha
* (elapsedTime - params.mFadeoutStartDelay)
/ params.mFadeoutDuration;
return Constants.Color.ALPHA_OPAQUE - decreasingAlpha;
return fullAlpha - decreasingAlpha;
}
/**