public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof(string))
{
ImageOverlay imageOverlay = value as ImageOverlay;
if (imageOverlay != null)
{
if (imageOverlay.Image == null)
{
return("(none)");
}
else
{
return("(set)");
}
}
TextOverlay textOverlay = value as TextOverlay;
if (textOverlay != null)
{
if (String.IsNullOrEmpty(textOverlay.Text))
{
return("(none)");
}
else
{
return("(set)");
}
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
TextOverlay GenerateOverlay()
{
TextOverlay ov = new TextOverlay();
ov.Alignment = ContentAlignment.MiddleCenter;
ov.TextColor = Color.White;
ov.BackColor = Color.GreenYellow;
ov.BorderColor = Color.Black;
ov.BorderWidth = 4.0f;
ov.Font = new Font("Segoe UI", 36);
ov.Text = "Loading...";
return ov;
}
/// <summary>
/// Create and configure the empty list msg overlay
/// </summary>
protected virtual void InitializeEmptyListMsgOverlay()
{
TextOverlay textOverlay = new TextOverlay();
textOverlay.Alignment = System.Drawing.ContentAlignment.MiddleCenter;
textOverlay.TextColor = SystemColors.ControlDarkDark;
textOverlay.BackColor = Color.BlanchedAlmond;
textOverlay.BorderColor = SystemColors.ControlDark;
textOverlay.BorderWidth = 2.0f;
this.EmptyListMsgOverlay = textOverlay;
}
/// <summary>
/// Initialize the standard image and text overlays
/// </summary>
protected virtual void InitializeStandardOverlays()
{
OverlayImage = new ImageOverlay();
AddOverlay(OverlayImage);
OverlayText = new TextOverlay();
AddOverlay(OverlayText);
}
