Example usage for android.view.accessibility AccessibilityEvent getToIndex

Introduction

In this page you can find the example usage for android.view.accessibility AccessibilityEvent getToIndex.

Prototype

public int getToIndex() 

Source Link

Document

Gets the index of text selection end or the index of the last visible item when scrolling.

Usage

From source file:com.android.screenspeak.controller.TextCursorControllerApp.java

private void processTextSelectionChange(AccessibilityEvent event) {
    AccessibilityNodeInfo node = event.getSource();
    if (node == null) {
        clear();//from   w w  w .jav  a  2s.c  o  m
        return;
    }

    AccessibilityNodeInfoCompat compat = new AccessibilityNodeInfoCompat(node);
    if (compat.equals(mNode)) {
        mPreviousCursorPosition = mCurrentCursorPosition;
        mCurrentCursorPosition = event.getToIndex();
    } else {
        clear();
        mNode = compat;
        mCurrentCursorPosition = event.getToIndex();
    }
}

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From source file:com.android.screenspeak.SavedNode.java

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    switch (event.getEventType()) {
    case AccessibilityEvent.TYPE_WINDOWS_CHANGED:
        clearCache();//from   www  .j a  v  a  2 s.c o m
        break;
    case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED:
        AccessibilityNodeInfo source = event.getSource();
        if (source != null) {
            AccessibilityNodeInfoCompat copyNode = new AccessibilityNodeInfoCompat(
                    AccessibilityNodeInfo.obtain(source));
            Selection selection = new Selection(event.getFromIndex(), event.getToIndex());
            mSelectionCache.put(copyNode, selection);
        }
        break;
    }
}

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From source file:com.android.talkback.eventprocessor.ProcessorScrollPosition.java

private CharSequence getDescriptionForScrollEvent(AccessibilityEvent event) {
    // If the from index or item count are invalid, don't announce anything.
    final int fromIndex = (event.getFromIndex() + 1);
    final int itemCount = event.getItemCount();
    if ((fromIndex <= 0) || (itemCount <= 0)) {
        return null;
    }/*from  w ww . j  ava 2s.c om*/

    // If the to and from indices are the same, or if the to index is
    // invalid, only announce the item at the from index.
    final int toIndex = event.getToIndex() + 1;
    if ((fromIndex == toIndex) || (toIndex <= 0) || (toIndex > itemCount)) {
        return mContext.getString(R.string.template_scroll_from_count, fromIndex, itemCount);
    }

    // Announce the range of visible items.
    return mContext.getString(R.string.template_scroll_from_to_count, fromIndex, toIndex, itemCount);
}

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From source file:com.android.screenspeak.eventprocessor.ProcessorScrollPosition.java

private CharSequence getDescriptionForScrollEvent(AccessibilityEvent event) {
    // If the event has text, use that by default.
    final CharSequence text = AccessibilityEventUtils.getEventTextOrDescription(event);
    if (!TextUtils.isEmpty(text)) {
        return text;
    }//from  www  .  j a  v  a 2 s  . co  m

    // If the from index or item count are invalid, don't announce anything.
    final int fromIndex = (event.getFromIndex() + 1);
    final int itemCount = event.getItemCount();
    if ((fromIndex <= 0) || (itemCount <= 0)) {
        return null;
    }

    // If the to and from indices are the same, or if the to index is
    // invalid, only announce the item at the from index.
    final int toIndex = event.getToIndex() + 1;
    if ((fromIndex == toIndex) || (toIndex <= 0) || (toIndex > itemCount)) {
        return mContext.getString(R.string.template_scroll_from_count, fromIndex, itemCount);
    }

    // Announce the range of visible items.
    return mContext.getString(R.string.template_scroll_from_to_count, fromIndex, toIndex, itemCount);
}

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From source file:com.android.screenspeak.eventprocessor.ProcessorFocusAndSingleTap.java

private int getScrollDirection(AccessibilityEvent event) {
    //check scroll of AdapterViews
    if (event.getFromIndex() > mLastScrollFromIndex || event.getToIndex() > mLastScrollToIndex) {
        return MOVING_FORWARDS;
    } else if (event.getFromIndex() < mLastScrollFromIndex || event.getToIndex() < mLastScrollToIndex) {
        return MOVING_BACKWARDS;
    }//from   w w w  .ja va2  s . c o m

    //check scroll of ScrollViews
    if (event.getScrollX() > mLastScrollX || event.getScrollY() > mLastScrollY) {
        return MOVING_FORWARDS;
    } else if (event.getScrollX() < mLastScrollX || event.getScrollY() < mLastScrollY) {
        return MOVING_BACKWARDS;
    }

    return MOVING_UNDEFINED_DIRECTION;
}

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From source file:com.android.talkback.eventprocessor.ProcessorFocusAndSingleTap.java

private @TraversalStrategy.SearchDirectionOrUnknown int getScrollDirection(AccessibilityEvent event) {
    //check scroll of AdapterViews
    if (event.getFromIndex() > mLastScrollFromIndex || event.getToIndex() > mLastScrollToIndex) {
        return TraversalStrategy.SEARCH_FOCUS_FORWARD;
    } else if (event.getFromIndex() < mLastScrollFromIndex || event.getToIndex() < mLastScrollToIndex) {
        return TraversalStrategy.SEARCH_FOCUS_BACKWARD;
    }/*from   w  w w .j  a  va2s  . c o  m*/

    //check scroll of ScrollViews
    if (event.getScrollX() > mLastScrollX || event.getScrollY() > mLastScrollY) {
        return TraversalStrategy.SEARCH_FOCUS_FORWARD;
    } else if (event.getScrollX() < mLastScrollX || event.getScrollY() < mLastScrollY) {
        return TraversalStrategy.SEARCH_FOCUS_BACKWARD;
    }

    return TraversalStrategy.SEARCH_FOCUS_UNKNOWN;
}

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From source file:com.google.android.marvin.mytalkback.ProcessorFocusAndSingleTap.java

private void handleViewScrolled(AccessibilityEvent event, AccessibilityRecordCompat record) {
    mLastViewScrolledEvent = event.getEventTime();

    final AccessibilityNodeInfoCompat source = record.getSource();
    if (source == null) {
        LogUtils.log(this, Log.ERROR, "Drop scroll with no source node");
        return;//from w w  w .  j  a  v  a2s  . c  o  m
    }

    // Only move focus if we've already seen the source.
    if (source.equals(mLastScrollSource)) {
        final boolean isMovingForward = (mLastScrollAction == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD)
                || (event.getFromIndex() > mLastScrollFromIndex) || (event.getToIndex() > mLastScrollToIndex);
        final boolean wasScrollAction = (mLastScrollAction != 0);
        mHandler.followScrollDelayed(source, isMovingForward, wasScrollAction);

        // Performing a scroll action results in smooth scrolling, which may
        // send multiple events spaced at least 100ms apart.
        mHandler.clearScrollActionDelayed();
    } else {
        setScrollActionImmediately(0);
    }

    if (mLastScrollSource != null) {
        mLastScrollSource.recycle();
    }

    mLastScrollSource = source;
    mLastScrollFromIndex = record.getFromIndex();
    mLastScrollToIndex = record.getToIndex();
}

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