/// <summary>
/// Invoked to check if a scanner button should be enabled. Uses context
/// to determine the 'enabled' state.
/// </summary>
/// <param name="arg">info about the scanner button</param>
public override void CheckWidgetEnabled(CheckEnabledArgs arg)
{
switch (arg.Widget.SubClass)
{
case "Back":
case "DeletePreviousWord":
if (_form != null && Windows.GetVisible(_form))
{
arg.Enabled = !_form.IsFilterEmpty();
}
else
{
arg.Enabled = true;
}
arg.Handled = true;
return;
case "clearText":
if (_form != null && Windows.GetVisible(_form))
{
arg.Enabled = !_form.IsFilterEmpty();
}
else
{
arg.Enabled = false;
}
arg.Handled = true;
return;
case "FileBrowserToggle":
arg.Handled = true;
arg.Enabled = false;
return;
}
checkWidgetEnabled(_supportedFeatures, arg);
}
