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Scaling in viewport moving state locks into a magnified state.

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1. If the user changes the magnification level while moving the
   viewport the magnification is locked. The gesture handle has
   to put device back into a viewport moving state if this was
   the last state.

bug:7139363

Change-Id: I24992b973bb15624580114353b004efdb35c2faa
This commit is contained in:
Svetoslav Ganov
2012-09-10 16:34:53 -07:00
parent bdf8fa0c1b
commit 662538957f
1 changed files with 13 additions and 7 deletions
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20
services/java/com/android/server/accessibility/ScreenMagnifier.java
View File

@@ -114,15 +114,15 @@ public final class ScreenMagnifier implements EventStreamTransformation {
private static final boolean DEBUG_VIEWPORT_WINDOW = false;
private static final boolean DEBUG_WINDOW_TRANSITIONS = false;
private static final boolean DEBUG_ROTATION = false;
private static final boolean DEBUG_SCALE_GESTURE_DETECTOR = false;
private static final boolean DEBUG_GESTURE_DETECTOR = false;
private static final boolean DEBUG_MAGNIFICATION_CONTROLLER = false;
private static final String LOG_TAG = ScreenMagnifier.class.getSimpleName();
private static final int STATE_DELEGATING = 1;
private static final int STATE_DETECTING = 2;
private static final int STATE_VIEWPORT_DRAGGING = 4;
private static final int STATE_MAGNIFIED_INTERACTION = 6;
private static final int STATE_VIEWPORT_DRAGGING = 3;
private static final int STATE_MAGNIFIED_INTERACTION = 4;
private static final float DEFAULT_MAGNIFICATION_SCALE = 2.0f;
private static final int DEFAULT_SCREEN_MAGNIFICATION_AUTO_UPDATE = 1;
@@ -158,6 +158,7 @@ public final class ScreenMagnifier implements EventStreamTransformation {
private EventStreamTransformation mNext;
private int mCurrentState;
private int mPreviousState;
private boolean mTranslationEnabledBeforePan;
private PointerCoords[] mTempPointerCoords;
@@ -191,6 +192,7 @@ public final class ScreenMagnifier implements EventStreamTransformation {
@Override
public void onMotionEvent(MotionEvent event, int policyFlags) {
mGestureDetector.onMotionEvent(event);
switch (mCurrentState) {
case STATE_DELEGATING: {
handleMotionEventStateDelegating(event, policyFlags);
@@ -210,7 +212,6 @@ public final class ScreenMagnifier implements EventStreamTransformation {
throw new IllegalStateException("Unknown state: " + mCurrentState);
}
}
mGestureDetector.onMotionEvent(event);
}
@Override
@@ -330,6 +331,7 @@ public final class ScreenMagnifier implements EventStreamTransformation {
}
}
}
mPreviousState = mCurrentState;
mCurrentState = state;
}
@@ -380,7 +382,11 @@ public final class ScreenMagnifier implements EventStreamTransformation {
if (scale != getPersistedScale()) {
persistScale(scale);
}
transitionToState(STATE_DETECTING);
if (mPreviousState == STATE_VIEWPORT_DRAGGING) {
transitionToState(STATE_VIEWPORT_DRAGGING);
} else {
transitionToState(STATE_DETECTING);
}
}
}
@@ -395,7 +401,7 @@ public final class ScreenMagnifier implements EventStreamTransformation {
case STATE_MAGNIFIED_INTERACTION: {
mCurrScaleFactor = mScaleGestureDetector.getScaleFactor();
final float scaleDelta = Math.abs(1.0f - mCurrScaleFactor * mPrevScaleFactor);
if (DEBUG_SCALE_GESTURE_DETECTOR) {
if (DEBUG_GESTURE_DETECTOR) {
Slog.i(LOG_TAG, "scaleDelta: " + scaleDelta);
}
if (!mScaling && scaleDelta > DETECT_SCALING_THRESHOLD) {
@@ -411,7 +417,7 @@ public final class ScreenMagnifier implements EventStreamTransformation {
mScaleGestureDetector.getFocusY(),
mInitialFocus.x, mInitialFocus.y);
final float panDelta = mCurrPan + mPrevPan;
if (DEBUG_SCALE_GESTURE_DETECTOR) {
if (DEBUG_GESTURE_DETECTOR) {
Slog.i(LOG_TAG, "panDelta: " + panDelta);
}
if (!mPanning && panDelta > mScaledDetectPanningThreshold) {