private void CheckUpdateElementText(TaskDialogUpdateElements updateFlags, TaskDialogUpdateElements flagToCheck,
TaskDialogElements element, string text)
{
if ((updateFlags & flagToCheck) == flagToCheck)
{
IntPtr strPtr = Marshal.StringToHGlobalUni(text);
try
{
// Note: SetElementText will resize the dialog while UpdateElementText will not (which would
// lead to clipped controls), so we use the former.
SendTaskDialogMessage(TaskDialogMessages.SetElementText, (int)element, strPtr);
}
finally
{
// We can now free the memory because SendMessage does not return until the
// message has been processed.
Marshal.FreeHGlobal(strPtr);
}
}
}
private void CheckUpdateIcon(TaskDialogUpdateElements updateFlags, TaskDialogUpdateElements flagToCheck,
TaskDialogIconElement element, IntPtr icon)
{
if ((updateFlags & flagToCheck) == flagToCheck)
{
SendTaskDialogMessage(TaskDialogMessages.UpdateIcon, (int)element, icon);
}
}
/// <summary>
/// Updates the specified dialog elements with the values from the current properties.
/// Note that when updating the main icon, the bar color will not change.
/// </summary>
/// <param name="updateFlags"></param>
public void UpdateElements(TaskDialogUpdateElements updateFlags)
{
CheckUpdateElementText(updateFlags, TaskDialogUpdateElements.Content, TaskDialogElements.Content, Content);
CheckUpdateElementText(updateFlags, TaskDialogUpdateElements.ExpandedInformation, TaskDialogElements.ExpandedInformation, ExpandedInformation);
CheckUpdateElementText(updateFlags, TaskDialogUpdateElements.Footer, TaskDialogElements.Footer, Footer);
CheckUpdateElementText(updateFlags, TaskDialogUpdateElements.MainInstruction, TaskDialogElements.MainInstruction, MainInstruction);
CheckUpdateIcon(updateFlags, TaskDialogUpdateElements.MainIcon, TaskDialogIconElement.Main, (IntPtr)MainIcon);
CheckUpdateIcon(updateFlags, TaskDialogUpdateElements.FooterIcon, TaskDialogIconElement.Footer, (IntPtr)FooterIcon);
}
