internal void NativeShow()
{
// Applies config struct and other settings, then
// calls main Win32 function.
if (settings == null)
{
throw new InvalidOperationException(LocalizedMessages.NativeTaskDialogConfigurationError);
}
// Do a last-minute parse of the various dialog control lists,
// and only allocate the memory at the last minute.
MarshalDialogControlStructs();
// Make the call and show the dialog.
// NOTE: this call is BLOCKING, though the thread
// WILL re-enter via the DialogProc.
try {
ShowState = DialogShowState.Showing;
int selectedButtonId;
int selectedRadioButtonId;
bool checkBoxChecked;
// Here is the way we use "vanilla" P/Invoke to call TaskDialogIndirect().
HResult hresult = TaskDialogNativeMethods.TaskDialogIndirect(
nativeDialogConfig,
out selectedButtonId,
out selectedRadioButtonId,
out checkBoxChecked);
if (CoreErrorHelper.Failed(hresult))
{
string msg;
switch (hresult)
{
case HResult.InvalidArguments:
msg = LocalizedMessages.NativeTaskDialogInternalErrorArgs;
break;
case HResult.OutOfMemory:
msg = LocalizedMessages.NativeTaskDialogInternalErrorComplex;
break;
default:
msg = string.Format(System.Globalization.CultureInfo.InvariantCulture,
LocalizedMessages.NativeTaskDialogInternalErrorUnexpected,
hresult);
break;
}
Exception e = Marshal.GetExceptionForHR((int)hresult);
throw new Win32Exception(msg, e);
}
SelectedButtonId = selectedButtonId;
SelectedRadioButtonId = selectedRadioButtonId;
CheckBoxChecked = checkBoxChecked;
} catch (EntryPointNotFoundException exc) {
throw new NotSupportedException(LocalizedMessages.NativeTaskDialogVersionError, exc);
} finally {
ShowState = DialogShowState.Closed;
}
}
/// <summary>
/// Sets important text properties.
/// </summary>
/// <param name="dialogConfig">An instance of a <see cref="TaskDialogNativeMethods.TaskDialogConfiguration"/> object.</param>
private void ApplyTextConfiguration(TaskDialogNativeMethods.TaskDialogConfiguration dialogConfig) {
// note that nulls or empty strings are fine here.
dialogConfig.content = text;
dialogConfig.windowTitle = caption;
dialogConfig.mainInstruction = instructionText;
dialogConfig.expandedInformation = detailsExpandedText;
dialogConfig.expandedControlText = detailsExpandedLabel;
dialogConfig.collapsedControlText = detailsCollapsedLabel;
dialogConfig.footerText = footerText;
dialogConfig.verificationText = checkBoxText;
}
private void ApplyOptionConfiguration(TaskDialogNativeMethods.TaskDialogConfiguration dialogConfig) {
// Handle options - start with no options set.
TaskDialogNativeMethods.TaskDialogOptions options = TaskDialogNativeMethods.TaskDialogOptions.None;
if (cancelable) {
options |= TaskDialogNativeMethods.TaskDialogOptions.AllowCancel;
}
if (footerCheckBoxChecked.HasValue && footerCheckBoxChecked.Value) {
options |= TaskDialogNativeMethods.TaskDialogOptions.CheckVerificationFlag;
}
if (hyperlinksEnabled) {
options |= TaskDialogNativeMethods.TaskDialogOptions.EnableHyperlinks;
}
if (detailsExpanded) {
options |= TaskDialogNativeMethods.TaskDialogOptions.ExpandedByDefault;
}
if (Tick != null) {
options |= TaskDialogNativeMethods.TaskDialogOptions.UseCallbackTimer;
}
if (startupLocation == TaskDialogStartupLocation.CenterOwner) {
options |= TaskDialogNativeMethods.TaskDialogOptions.PositionRelativeToWindow;
}
// Note: no validation required, as we allow this to
// be set even if there is no expanded information
// text because that could be added later.
// Default for Win32 API is to expand into (and after)
// the content area.
if (expansionMode == TaskDialogExpandedDetailsLocation.ExpandFooter) {
options |= TaskDialogNativeMethods.TaskDialogOptions.ExpandFooterArea;
}
// Finally, apply options to config.
dialogConfig.taskDialogFlags = options;
}
private void ApplyGeneralNativeConfiguration(TaskDialogNativeMethods.TaskDialogConfiguration dialogConfig) {
// If an owner wasn't specifically specified,
// we'll use the app's main window.
if (ownerWindow != IntPtr.Zero) {
dialogConfig.parentHandle = ownerWindow;
}
// Other miscellaneous sets.
dialogConfig.mainIcon = new TaskDialogNativeMethods.IconUnion((int)icon);
dialogConfig.footerIcon = new TaskDialogNativeMethods.IconUnion((int)footerIcon);
dialogConfig.commonButtons = (TaskDialogNativeMethods.TaskDialogCommonButtons)standardButtons;
}
