Examples with ViewParent android.view.ViewParent used on opensource projects

Example 16 with ViewParent

use of android.view.ViewParent in project android_frameworks_base by ParanoidAndroid.

the class LayoutTransition method runChangeTransition.

/**
     * This function sets up animations on all of the views that change during layout.
     * For every child in the parent, we create a change animation of the appropriate
     * type (appearing, disappearing, or changing) and ask it to populate its start values from its
     * target view. We add layout listeners to all child views and listen for changes. For
     * those views that change, we populate the end values for those animations and start them.
     * Animations are not run on unchanging views.
     *
     * @param parent The container which is undergoing a change.
     * @param newView The view being added to or removed from the parent. May be null if the
     * changeReason is CHANGING.
     * @param changeReason A value of APPEARING, DISAPPEARING, or CHANGING, indicating whether the
     * transition is occurring because an item is being added to or removed from the parent, or
     * if it is running in response to a layout operation (that is, if the value is CHANGING).
     */
private void runChangeTransition(final ViewGroup parent, View newView, final int changeReason) {
    Animator baseAnimator = null;
    Animator parentAnimator = null;
    final long duration;
    switch(changeReason) {
        case APPEARING:
            baseAnimator = mChangingAppearingAnim;
            duration = mChangingAppearingDuration;
            parentAnimator = defaultChangeIn;
            break;
        case DISAPPEARING:
            baseAnimator = mChangingDisappearingAnim;
            duration = mChangingDisappearingDuration;
            parentAnimator = defaultChangeOut;
            break;
        case CHANGING:
            baseAnimator = mChangingAnim;
            duration = mChangingDuration;
            parentAnimator = defaultChange;
            break;
        default:
            // Shouldn't reach here
            duration = 0;
            break;
    }
    // If the animation is null, there's nothing to do
    if (baseAnimator == null) {
        return;
    }
    // reset the inter-animation delay, in case we use it later
    staggerDelay = 0;
    // used for later cleanup
    final ViewTreeObserver observer = parent.getViewTreeObserver();
    if (!observer.isAlive()) {
        // If the observer's not in a good state, skip the transition
        return;
    }
    int numChildren = parent.getChildCount();
    for (int i = 0; i < numChildren; ++i) {
        final View child = parent.getChildAt(i);
        // only animate the views not being added or removed
        if (child != newView) {
            setupChangeAnimation(parent, changeReason, baseAnimator, duration, child);
        }
    }
    if (mAnimateParentHierarchy) {
        ViewGroup tempParent = parent;
        while (tempParent != null) {
            ViewParent parentParent = tempParent.getParent();
            if (parentParent instanceof ViewGroup) {
                setupChangeAnimation((ViewGroup) parentParent, changeReason, parentAnimator, duration, tempParent);
                tempParent = (ViewGroup) parentParent;
            } else {
                tempParent = null;
            }
        }
    }
    // This is the cleanup step. When we get this rendering event, we know that all of
    // the appropriate animations have been set up and run. Now we can clear out the
    // layout listeners.
    observer.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {

        public boolean onPreDraw() {
            parent.getViewTreeObserver().removeOnPreDrawListener(this);
            int count = layoutChangeListenerMap.size();
            if (count > 0) {
                Collection<View> views = layoutChangeListenerMap.keySet();
                for (View view : views) {
                    View.OnLayoutChangeListener listener = layoutChangeListenerMap.get(view);
                    view.removeOnLayoutChangeListener(listener);
                }
            }
            layoutChangeListenerMap.clear();
            return true;
        }
    });
}

Example 17 with ViewParent

use of android.view.ViewParent in project android_frameworks_base by ParanoidAndroid.

the class EditTextPreference method onBindDialogView.

@Override
protected void onBindDialogView(View view) {
    super.onBindDialogView(view);
    EditText editText = mEditText;
    editText.setText(getText());
    ViewParent oldParent = editText.getParent();
    if (oldParent != view) {
        if (oldParent != null) {
            ((ViewGroup) oldParent).removeView(editText);
        }
        onAddEditTextToDialogView(view, editText);
    }
}

Example 18 with ViewParent

use of android.view.ViewParent in project android_frameworks_base by ParanoidAndroid.

the class AbsListView method startScrollIfNeeded.

private boolean startScrollIfNeeded(int y) {
    // Check if we have moved far enough that it looks more like a
    // scroll than a tap
    final int deltaY = y - mMotionY;
    final int distance = Math.abs(deltaY);
    final boolean overscroll = mScrollY != 0;
    if (overscroll || distance > mTouchSlop) {
        createScrollingCache();
        if (overscroll) {
            mTouchMode = TOUCH_MODE_OVERSCROLL;
            mMotionCorrection = 0;
        } else {
            mTouchMode = TOUCH_MODE_SCROLL;
            mMotionCorrection = deltaY > 0 ? mTouchSlop : -mTouchSlop;
        }
        final Handler handler = getHandler();
        // say it's possible.
        if (handler != null) {
            handler.removeCallbacks(mPendingCheckForLongPress);
        }
        setPressed(false);
        View motionView = getChildAt(mMotionPosition - mFirstPosition);
        if (motionView != null) {
            motionView.setPressed(false);
        }
        reportScrollStateChange(OnScrollListener.SCROLL_STATE_TOUCH_SCROLL);
        // Time to start stealing events! Once we've stolen them, don't let anyone
        // steal from us
        final ViewParent parent = getParent();
        if (parent != null) {
            parent.requestDisallowInterceptTouchEvent(true);
        }
        scrollIfNeeded(y);
        return true;
    }
    return false;
}

Example 19 with ViewParent

use of android.view.ViewParent in project android_frameworks_base by ParanoidAndroid.

the class ListView method findAccessibilityFocusedChild.

/**
     * @param focusedView the view that has accessibility focus.
     * @return the direct child that contains accessibility focus.
     */
private View findAccessibilityFocusedChild(View focusedView) {
    ViewParent viewParent = focusedView.getParent();
    while ((viewParent instanceof View) && (viewParent != this)) {
        focusedView = (View) viewParent;
        viewParent = viewParent.getParent();
    }
    if (!(viewParent instanceof View)) {
        return null;
    }
    return focusedView;
}

Example 20 with ViewParent

use of android.view.ViewParent in project android_frameworks_base by ParanoidAndroid.

the class HorizontalScrollView method onTouchEvent.

@Override
public boolean onTouchEvent(MotionEvent ev) {
    initVelocityTrackerIfNotExists();
    mVelocityTracker.addMovement(ev);
    final int action = ev.getAction();
    switch(action & MotionEvent.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            {
                if (getChildCount() == 0) {
                    return false;
                }
                if ((mIsBeingDragged = !mScroller.isFinished())) {
                    final ViewParent parent = getParent();
                    if (parent != null) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                }
                /*
                 * If being flinged and user touches, stop the fling. isFinished
                 * will be false if being flinged.
                 */
                if (!mScroller.isFinished()) {
                    mScroller.abortAnimation();
                }
                // Remember where the motion event started
                mLastMotionX = (int) ev.getX();
                mActivePointerId = ev.getPointerId(0);
                break;
            }
        case MotionEvent.ACTION_MOVE:
            final int activePointerIndex = ev.findPointerIndex(mActivePointerId);
            if (activePointerIndex == -1) {
                Log.e(TAG, "Invalid pointerId=" + mActivePointerId + " in onTouchEvent");
                break;
            }
            final int x = (int) ev.getX(activePointerIndex);
            int deltaX = mLastMotionX - x;
            if (!mIsBeingDragged && Math.abs(deltaX) > mTouchSlop) {
                final ViewParent parent = getParent();
                if (parent != null) {
                    parent.requestDisallowInterceptTouchEvent(true);
                }
                mIsBeingDragged = true;
                if (deltaX > 0) {
                    deltaX -= mTouchSlop;
                } else {
                    deltaX += mTouchSlop;
                }
            }
            if (mIsBeingDragged) {
                // Scroll to follow the motion event
                mLastMotionX = x;
                final int oldX = mScrollX;
                final int oldY = mScrollY;
                final int range = getScrollRange();
                final int overscrollMode = getOverScrollMode();
                final boolean canOverscroll = overscrollMode == OVER_SCROLL_ALWAYS || (overscrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && range > 0);
                if (overScrollBy(deltaX, 0, mScrollX, 0, range, 0, mOverscrollDistance, 0, true)) {
                    // Break our velocity if we hit a scroll barrier.
                    mVelocityTracker.clear();
                }
                onScrollChanged(mScrollX, mScrollY, oldX, oldY);
                if (canOverscroll) {
                    final int pulledToX = oldX + deltaX;
                    if (pulledToX < 0) {
                        mEdgeGlowLeft.onPull((float) deltaX / getWidth());
                        if (!mEdgeGlowRight.isFinished()) {
                            mEdgeGlowRight.onRelease();
                        }
                    } else if (pulledToX > range) {
                        mEdgeGlowRight.onPull((float) deltaX / getWidth());
                        if (!mEdgeGlowLeft.isFinished()) {
                            mEdgeGlowLeft.onRelease();
                        }
                    }
                    if (mEdgeGlowLeft != null && (!mEdgeGlowLeft.isFinished() || !mEdgeGlowRight.isFinished())) {
                        postInvalidateOnAnimation();
                    }
                }
            }
            break;
        case MotionEvent.ACTION_UP:
            if (mIsBeingDragged) {
                final VelocityTracker velocityTracker = mVelocityTracker;
                velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);
                int initialVelocity = (int) velocityTracker.getXVelocity(mActivePointerId);
                if (getChildCount() > 0) {
                    if ((Math.abs(initialVelocity) > mMinimumVelocity)) {
                        fling(-initialVelocity);
                    } else {
                        if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) {
                            postInvalidateOnAnimation();
                        }
                    }
                }
                mActivePointerId = INVALID_POINTER;
                mIsBeingDragged = false;
                recycleVelocityTracker();
                if (mEdgeGlowLeft != null) {
                    mEdgeGlowLeft.onRelease();
                    mEdgeGlowRight.onRelease();
                }
            }
            break;
        case MotionEvent.ACTION_CANCEL:
            if (mIsBeingDragged && getChildCount() > 0) {
                if (mScroller.springBack(mScrollX, mScrollY, 0, getScrollRange(), 0, 0)) {
                    postInvalidateOnAnimation();
                }
                mActivePointerId = INVALID_POINTER;
                mIsBeingDragged = false;
                recycleVelocityTracker();
                if (mEdgeGlowLeft != null) {
                    mEdgeGlowLeft.onRelease();
                    mEdgeGlowRight.onRelease();
                }
            }
            break;
        case MotionEvent.ACTION_POINTER_UP:
            onSecondaryPointerUp(ev);
            break;
    }
    return true;
}