Android/frameworks_base
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Avoid calling into JNI if not needed.

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Short-circuit a few MotionEvent JNI calls in simple cases.

Change-Id: I6c97c06b5a5fd203a423dc88f428637b9dec71ae
This commit is contained in:
Jeff Brown
2012-03-21 19:49:27 -07:00
parent e67ca420e4
commit 9ea77fc821
1 changed files with 15 additions and 5 deletions
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20
core/java/android/view/MotionEvent.java
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@@ -1654,14 +1654,22 @@ public final class MotionEvent extends InputEvent implements Parcelable {
}
}
}
/**
* Scales down the coordination of this event by the given scale.
* Applies a scale factor to all points within this event.
*
* This method is used to adjust touch events to simulate different density
* displays for compatibility mode. The values returned by {@link #getRawX()},
* {@link #getRawY()}, {@link #getXPrecision()} and {@link #getYPrecision()}
* are also affected by the scale factor.
*
* @param scale The scale factor to apply.
* @hide
*/
public final void scale(float scale) {
nativeScale(mNativePtr, scale);
if (scale != 1.0f) {
nativeScale(mNativePtr, scale);
}
}
/** {@inheritDoc} */
@@ -2631,7 +2639,9 @@ public final class MotionEvent extends InputEvent implements Parcelable {
* @param deltaY Amount to add to the current Y coordinate of the event.
*/
public final void offsetLocation(float deltaX, float deltaY) {
nativeOffsetLocation(mNativePtr, deltaX, deltaY);
if (deltaX != 0.0f || deltaY != 0.0f) {
nativeOffsetLocation(mNativePtr, deltaX, deltaY);
}
}
/**
@@ -2644,7 +2654,7 @@ public final class MotionEvent extends InputEvent implements Parcelable {
public final void setLocation(float x, float y) {
float oldX = getX();
float oldY = getY();
nativeOffsetLocation(mNativePtr, x - oldX, y - oldY);
offsetLocation(x - oldX, y - oldY);
}
/**