/// <summary>Sets the children Cursor for a particular group.</summary>
/// <remarks>
/// Sets the children Cursor for a particular group. If there is an existing cursor
/// it will be closed.
/// <p>
/// This is useful when asynchronously querying to prevent blocking the UI.
/// </remarks>
/// <param name="groupPosition">The group whose children are being set via this Cursor.
/// </param>
/// <param name="childrenCursor">The Cursor that contains the children of the group.</param>
public virtual void setChildrenCursor(int groupPosition, android.database.Cursor
childrenCursor)
{
android.widget.CursorTreeAdapter.MyCursorHelper childrenCursorHelper = getChildrenCursorHelper
(groupPosition, false);
childrenCursorHelper.changeCursor(childrenCursor, false);
}
/// <summary>Deactivates the Cursor and removes the helper from cache.</summary>
/// <remarks>Deactivates the Cursor and removes the helper from cache.</remarks>
/// <param name="groupPosition">
/// The group whose children Cursor and helper should be
/// deactivated.
/// </param>
internal virtual void deactivateChildrenCursorHelper(int groupPosition)
{
lock (this)
{
android.widget.CursorTreeAdapter.MyCursorHelper cursorHelper = getChildrenCursorHelper
(groupPosition, true);
mChildrenCursorHelpers.remove(groupPosition);
cursorHelper.deactivate();
}
}
private void init(android.database.Cursor cursor, android.content.Context context
, bool autoRequery)
{
mContext = context;
mHandler = new android.os.Handler();
mAutoRequery = autoRequery;
mGroupCursorHelper = new android.widget.CursorTreeAdapter.MyCursorHelper(this, cursor
);
mChildrenCursorHelpers = new android.util.SparseArray<android.widget.CursorTreeAdapter
.MyCursorHelper>();
}
private void init(android.database.Cursor cursor, android.content.Context context
, bool autoRequery)
{
mContext = context;
mHandler = new android.os.Handler();
mAutoRequery = autoRequery;
mGroupCursorHelper = new android.widget.CursorTreeAdapter.MyCursorHelper(this, cursor
);
mChildrenCursorHelpers = new android.util.SparseArray <android.widget.CursorTreeAdapter
.MyCursorHelper>();
}
/// <summary>Gets the cursor helper for the children in the given group.</summary>
/// <remarks>Gets the cursor helper for the children in the given group.</remarks>
/// <param name="groupPosition">The group whose children will be returned</param>
/// <param name="requestCursor">
/// Whether to request a Cursor via
/// <see cref="getChildrenCursor(android.database.Cursor)">getChildrenCursor(android.database.Cursor)
/// </see>
/// (true), or to assume a call
/// to
/// <see cref="setChildrenCursor(int, android.database.Cursor)">setChildrenCursor(int, android.database.Cursor)
/// </see>
/// will happen shortly
/// (false).
/// </param>
/// <returns>The cursor helper for the children of the given group</returns>
internal virtual android.widget.CursorTreeAdapter.MyCursorHelper getChildrenCursorHelper
(int groupPosition, bool requestCursor)
{
lock (this)
{
android.widget.CursorTreeAdapter.MyCursorHelper cursorHelper = mChildrenCursorHelpers
.get(groupPosition);
if (cursorHelper == null)
{
if (mGroupCursorHelper.moveTo(groupPosition) == null)
{
return(null);
}
android.database.Cursor cursor = getChildrenCursor(mGroupCursorHelper.getCursor()
);
cursorHelper = new android.widget.CursorTreeAdapter.MyCursorHelper(this, cursor);
mChildrenCursorHelpers.put(groupPosition, cursorHelper);
}
return(cursorHelper);
}
}
public override android.view.View getChildView(int groupPosition, int childPosition
, bool isLastChild, android.view.View convertView, android.view.ViewGroup parent
)
{
android.widget.CursorTreeAdapter.MyCursorHelper cursorHelper = getChildrenCursorHelper
(groupPosition, true);
android.database.Cursor cursor = cursorHelper.moveTo(childPosition);
if (cursor == null)
{
throw new System.InvalidOperationException("this should only be called when the cursor is valid"
);
}
android.view.View v;
if (convertView == null)
{
v = newChildView(mContext, cursor, isLastChild, parent);
}
else
{
v = convertView;
}
bindChildView(v, mContext, cursor, isLastChild);
return(v);
}
/// <summary>Gets the cursor helper for the children in the given group.</summary>
/// <remarks>Gets the cursor helper for the children in the given group.</remarks>
/// <param name="groupPosition">The group whose children will be returned</param>
/// <param name="requestCursor">
/// Whether to request a Cursor via
/// <see cref="getChildrenCursor(android.database.Cursor)">getChildrenCursor(android.database.Cursor)
/// </see>
/// (true), or to assume a call
/// to
/// <see cref="setChildrenCursor(int, android.database.Cursor)">setChildrenCursor(int, android.database.Cursor)
/// </see>
/// will happen shortly
/// (false).
/// </param>
/// <returns>The cursor helper for the children of the given group</returns>
internal virtual android.widget.CursorTreeAdapter.MyCursorHelper getChildrenCursorHelper
(int groupPosition, bool requestCursor)
{
lock (this)
{
android.widget.CursorTreeAdapter.MyCursorHelper cursorHelper = mChildrenCursorHelpers
.get(groupPosition);
if (cursorHelper == null)
{
if (mGroupCursorHelper.moveTo(groupPosition) == null)
{
return null;
}
android.database.Cursor cursor = getChildrenCursor(mGroupCursorHelper.getCursor()
);
cursorHelper = new android.widget.CursorTreeAdapter.MyCursorHelper(this, cursor);
mChildrenCursorHelpers.put(groupPosition, cursorHelper);
}
return cursorHelper;
}
}
public override int getChildrenCount(int groupPosition)
{
android.widget.CursorTreeAdapter.MyCursorHelper helper = getChildrenCursorHelper(
groupPosition, true);
return((mGroupCursorHelper.isValid() && helper != null) ? helper.getCount() : 0);
}
