Example usage for android.widget ListAdapter isEnabled

Introduction

In this page you can find the example usage for android.widget ListAdapter isEnabled.

Prototype

boolean isEnabled(int position);

Source Link

Document

Returns true if the item at the specified position is not a separator.

Usage

From source file:com.aliasapps.seq.scroller.TwoWayView.java

/**
 * @param direction either {@link View#FOCUS_UP} or {@link View#FOCUS_DOWN} or
 *        {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT} depending on the
 *        current view orientation./*from www.  ja  v  a 2  s.  co  m*/
 *
 * @return The position of the next selectable position of the views that
 *         are currently visible, taking into account the fact that there might
 *         be no selection.  Returns {@link #INVALID_POSITION} if there is no
 *         selectable view on screen in the given direction.
 */
private int lookForSelectablePositionOnScreen(int direction) {
    forceValidFocusDirection(direction);

    final int firstPosition = mFirstPosition;
    final ListAdapter adapter = getAdapter();

    if (direction == View.FOCUS_DOWN || direction == View.FOCUS_RIGHT) {
        int startPos = (mSelectedPosition != INVALID_POSITION ? mSelectedPosition + 1 : firstPosition);

        if (startPos >= adapter.getCount()) {
            return INVALID_POSITION;
        }

        if (startPos < firstPosition) {
            startPos = firstPosition;
        }

        final int lastVisiblePos = getLastVisiblePosition();

        for (int pos = startPos; pos <= lastVisiblePos; pos++) {
            if (adapter.isEnabled(pos) && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) {
                return pos;
            }
        }
    } else {
        final int last = firstPosition + getChildCount() - 1;

        int startPos = (mSelectedPosition != INVALID_POSITION) ? mSelectedPosition - 1
                : firstPosition + getChildCount() - 1;

        if (startPos < 0 || startPos >= adapter.getCount()) {
            return INVALID_POSITION;
        }

        if (startPos > last) {
            startPos = last;
        }

        for (int pos = startPos; pos >= firstPosition; pos--) {
            if (adapter.isEnabled(pos) && getChildAt(pos - firstPosition).getVisibility() == View.VISIBLE) {
                return pos;
            }
        }
    }

    return INVALID_POSITION;
}

From source file:com.aliasapps.seq.scroller.TwoWayView.java

@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

    if (gainFocus && mSelectedPosition < 0 && !isInTouchMode()) {
        if (!mIsAttached && mAdapter != null) {
            // Data may have changed while we were detached and it's valid
            // to change focus while detached. Refresh so we don't die.
            mDataChanged = true;/*  w  ww .j a  v  a  2 s.  c o  m*/
            mOldItemCount = mItemCount;
            mItemCount = mAdapter.getCount();
        }

        resurrectSelection();
    }

    final ListAdapter adapter = mAdapter;
    int closetChildIndex = INVALID_POSITION;
    int closestChildStart = 0;

    if (adapter != null && gainFocus && previouslyFocusedRect != null) {
        previouslyFocusedRect.offset(getScrollX(), getScrollY());

        // Don't cache the result of getChildCount or mFirstPosition here,
        // it could change in layoutChildren.
        if (adapter.getCount() < getChildCount() + mFirstPosition) {
            mLayoutMode = LAYOUT_NORMAL;
            layoutChildren();
        }

        // Figure out which item should be selected based on previously
        // focused rect.
        Rect otherRect = mTempRect;
        int minDistance = Integer.MAX_VALUE;
        final int childCount = getChildCount();
        final int firstPosition = mFirstPosition;

        for (int i = 0; i < childCount; i++) {
            // Only consider selectable views
            if (!adapter.isEnabled(firstPosition + i)) {
                continue;
            }

            View other = getChildAt(i);
            other.getDrawingRect(otherRect);
            offsetDescendantRectToMyCoords(other, otherRect);
            int distance = getDistance(previouslyFocusedRect, otherRect, direction);

            if (distance < minDistance) {
                minDistance = distance;
                closetChildIndex = i;
                closestChildStart = (mIsVertical ? other.getTop() : other.getLeft());
            }
        }
    }

    if (closetChildIndex >= 0) {
        setSelectionFromOffset(closetChildIndex + mFirstPosition, closestChildStart);
    } else {
        requestLayout();
    }
}

From source file:com.artifex.mupdflib.TwoWayView.java

@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

    if (gainFocus && mSelectedPosition < 0 && !isInTouchMode()) {
        if (!mIsAttached && mAdapter != null) {
            // Data may have changed while we were detached and it's valid
            // to change focus while detached. Refresh so we don't die.
            mDataChanged = true;//www  . j  av  a  2  s. c om
            mOldItemCount = mItemCount;
            mItemCount = mAdapter.getCount();
        }

        resurrectSelection();
    }

    final ListAdapter adapter = mAdapter;
    int closetChildIndex = INVALID_POSITION;
    int closestChildStart = 0;

    if (adapter != null && gainFocus && previouslyFocusedRect != null) {
        previouslyFocusedRect.offset(getScrollX(), getScrollY());

        // Don't cache the result of getChildCount or mFirstPosition here,
        // it could change in layoutChildren.
        if (adapter.getCount() < getChildCount() + mFirstPosition) {
            mLayoutMode = LAYOUT_NORMAL;
            layoutChildren();
        }

        // Figure out which item should be selected based on previously
        // focused rect.
        Rect otherRect = mTempRect;
        int minDistance = Integer.MAX_VALUE;
        final int childCount = getChildCount();
        final int firstPosition = mFirstPosition;

        for (int i = 0; i < childCount; i++) {
            // Only consider selectable views
            if (!adapter.isEnabled(firstPosition + i)) {
                continue;
            }

            View other = getChildAt(i);
            other.getDrawingRect(otherRect);
            offsetDescendantRectToMyCoords(other, otherRect);
            int distance = getDistance(previouslyFocusedRect, otherRect, direction);

            if (distance < minDistance) {
                minDistance = distance;
                closetChildIndex = i;
                closestChildStart = getChildStartEdge(other);
            }
        }
    }

    if (closetChildIndex >= 0) {
        setSelectionFromOffset(closetChildIndex + mFirstPosition, closestChildStart);
    } else {
        requestLayout();
    }
}