/// <summary>
/// Handle the Loaded and LostFocus event on the control
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">A <see cref="RoutedEventArgs"/> that contains the event data.</param>
private static void control_Loaded(object sender, RoutedEventArgs e)
{
Control control = (Control)sender;
if (PlaceholderService.shouldShowWatermark(control))
{
PlaceholderService.showWatermark(control);
}
}
/// <summary>
/// Show the watermark on the specified control
/// </summary>
/// <param name="control">Control to show the watermark on</param>
private static void showWatermark(Control control)
{
AdornerLayer layer = AdornerLayer.GetAdornerLayer(control);
// layer could be null if control is no longer in the visual tree
if (layer != null && control != null)
{
layer.Add(new PlaceholderAdorner(control, PlaceholderService.GetPlaceholder(control)));
}
}
/// <summary>
/// Handle the GotFocus event on the control
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">A <see cref="RoutedEventArgs"/> that contains the event data.</param>
private static void control_GotKeyboardFocus(object sender, RoutedEventArgs e)
{
Control c = (Control)sender;
if (PlaceholderService.shouldShowWatermark(c))
{
PlaceholderService.showWatermark(c);
}
else
{
PlaceholderService.removeWatermark(c);
}
}
/// <summary>
/// Event handler for the items changed event
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">A <see cref="ItemsChangedEventArgs"/> that contains the event data.</param>
private static void itemsChanged(object sender, ItemsChangedEventArgs e)
{
ItemsControl control;
if (itemsControls.TryGetValue(sender, out control))
{
if (PlaceholderService.shouldShowWatermark(control))
{
PlaceholderService.showWatermark(control);
}
else
{
PlaceholderService.removeWatermark(control);
}
}
}
/// <summary>
/// Event handler for the items source changed event
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">A <see cref="EventArgs"/> that contains the event data.</param>
private static void itemsSourceChanged(object sender, EventArgs e)
{
ItemsControl c = (ItemsControl)sender;
if (c.ItemsSource != null)
{
if (PlaceholderService.shouldShowWatermark(c))
{
PlaceholderService.showWatermark(c);
}
else
{
PlaceholderService.removeWatermark(c);
}
}
else
{
PlaceholderService.showWatermark(c);
}
}
