/// <summary>
/// Adds an item to the list.
/// </summary>
/// <param name="item">Index at which to add the item.</param>
/// <param name="a">Item to add.</param>
/// <returns>true if successful.</returns>
public bool Add(string item, Availability a)
{
if (itemsArray.Count < maxNumberOfItems)
{
CustomListItem listItem;
listItem = new CustomListItem(this, item, this.UniqueId, a);
itemsArray.Add(listItem);
// Initialize the selection if necessary.
if (currentSelection < 0)
{
currentSelection = 0;
listItem.IsSelected = true;
}
this.Invalidate(); // update to draw new added item
// Raise a UI Automation event.
if (myListProvider != null)
{
ListProvider.OnStructureChangeAdd(listItem.Container);
}
return(true);
}
return(false);
}
/// <summary>
/// Removes an item from the list.
/// </summary>
/// <param name="itemIndex">Index of the item.</param>
/// <returns>true if successful.</returns>
public bool Remove(int itemIndex)
{
if ((this.ItemCount == minNumberOfItems) || (itemIndex <= -1) || (itemIndex >= this.ItemCount))
{
// If the number of items in the list is already at minimum,
// no additional items can be removed.
return(false);
}
CustomListItem itemToBeRemoved = (CustomListItem)itemsArray[itemIndex];
// Notify the provider that item it going to be destroyed.
itemToBeRemoved.IsAlive = false;
// Force refresh.
this.Invalidate();
// Raise notification.
if (myListProvider != null)
{
ListProvider.OnStructureChangeRemove(itemToBeRemoved.Container);
}
itemsArray.RemoveAt(itemIndex);
currentSelection = 0; // Reset selection to first item.
return(true);
}
/// <summary>
/// Responds to a selection change by raising an event.
/// </summary>
/// <param name="listItem">The item that has been selected.</param>
public static void OnSelectionChange(CustomListItem listItem)
{
if (AutomationInteropProvider.ClientsAreListening)
{
AutomationEventArgs args = new AutomationEventArgs(SelectionItemPatternIdentifiers.ElementSelectedEvent);
AutomationInteropProvider.RaiseAutomationEvent(SelectionItemPatternIdentifiers.ElementSelectedEvent,
listItem.Provider, args);
}
}
/// <summary>
/// Responds to a focus change by raising an event.
/// </summary>
/// <param name="listItem">The item that has received focus.</param>
public static void OnFocusChange(CustomListItem listItem)
{
if (AutomationInteropProvider.ClientsAreListening)
{
AutomationEventArgs args = new AutomationEventArgs(
AutomationElementIdentifiers.AutomationFocusChangedEvent);
AutomationInteropProvider.RaiseAutomationEvent(
AutomationElementIdentifiers.AutomationFocusChangedEvent,
listItem.Provider, args);
}
}
/// <summary>
/// Responds to Paint event.
/// </summary>
/// <param name="e">Event arguments.</param>
protected override void OnPaint(PaintEventArgs e)
{
// Use SystemBrushes for colors of a control.
System.Drawing.Brush backgroundBrush = SystemBrushes.Window;
System.Drawing.Brush focusedBrush;
if (this.Focused)
{
focusedBrush = SystemBrushes.Highlight;
}
else
{
focusedBrush = new SolidBrush(Color.DarkGray);
}
e.Graphics.FillRectangle(backgroundBrush, DisplayRectangle);
// Colors for online/offline image.
System.Drawing.Brush itemOnBrush = Brushes.Green;
System.Drawing.Brush itemOffBrush = Brushes.Red;
System.Drawing.Font itemTextFont = SystemFonts.DefaultFont;
System.Drawing.Brush itemInk = SystemBrushes.ControlText;
System.Drawing.Brush selectedItemInk = SystemBrushes.HighlightText;
// Loop through items to draw their text onto screen
for (int i = 0; i < itemsArray.Count; i++)
{
System.Drawing.Point pt = new System.Drawing.Point(DisplayRectangle.Left + 2, DisplayRectangle.Top + (i * itemHeight));
CustomListItem listItem = ((CustomListItem)itemsArray[i]);
Rectangle rc = GetRectForItem(i);
rc = new Rectangle(rc.X, rc.Y + 2, imageWidth, imageHeight);
if (listItem.Status == Availability.Online)
{
e.Graphics.FillRectangle(itemOnBrush, rc);
}
else
{
e.Graphics.FillRectangle(itemOffBrush, rc);
}
rc = new Rectangle(rc.X + textIndent, rc.Y - 2, listWidth - textIndent, itemHeight);
if (i == SelectedIndex)
{
e.Graphics.FillRectangle(focusedBrush, rc);
e.Graphics.DrawString(listItem.Text, itemTextFont, selectedItemInk, rc);
}
else
{
// Item not selected.
e.Graphics.DrawString(listItem.Text, itemTextFont, itemInk, rc);
}
}
e.Dispose();
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="rootProvider">UI Automation provider for the
/// fragment root (the containing list).</param>
/// <param name="thisItem">The control that owns this provider.</param>
public ListItemProvider(ListProvider rootProvider, CustomListItem thisItem)
{
ContainingListProvider = rootProvider;
ListItemControl = thisItem;
}
/// <summary>
/// Gets the index of the specified item.
/// </summary>
/// <param name="listItem">The item.</param>
/// <returns>The zero-based index.</returns>
public int ItemIndex(CustomListItem listItem)
{
// Allows CustomListItem to requery its index, as it can change.
return(itemsArray.IndexOf(listItem));
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="rootProvider">
/// UI Automation provider for the fragment root (the containing list).
/// </param>
/// <param name="thisItem">The control that owns this provider.</param>
public ListItemProvider(ListProvider rootProvider, CustomListItem thisItem)
{
containerListProvider = rootProvider;
listItemControl = thisItem;
selectedItems = new ArrayList();
}
