// Configuration is applied at dialog creation time
internal NativeTaskDialog(
NativeTaskDialogSettings settings,
TaskDialog outerDialog)
{
nativeDialogConfig = settings.NativeConfiguration;
this.settings = settings;
// Wireup dialog proc message loop for this instance
nativeDialogConfig.pfCallback = new NativeMethods.PFTASKDIALOGCALLBACK(DialogProc);
// Keep a reference to the outer shell, so we can notify
this.outerDialog = outerDialog;
}
// Configuration is applied at dialog creation time
internal NativeTaskDialog(
NativeTaskDialogSettings settings,
TaskDialog outerDialog)
{
nativeDialogConfig = settings.NativeConfiguration;
this.settings = settings;
// Wireup dialog proc message loop for this instance
nativeDialogConfig.pfCallback = new NativeMethods.PFTASKDIALOGCALLBACK(DialogProc);
// Keep a reference to the outer shell, so we can notify
this.outerDialog = outerDialog;
}
// Builds the actual configuration that the NativeTaskDialog (and underlying Win32 API)
// expects, by parsing the various control lists, marshalling to the unmgd heap, etc.
private void MarshalDialogControlStructs(NativeTaskDialogSettings settings)
{
if (settings.Buttons != null && settings.Buttons.Length > 0)
{
buttonArray = AllocateAndMarshalButtons(settings.Buttons);
settings.NativeConfiguration.pButtons = buttonArray;
settings.NativeConfiguration.cButtons = (uint)settings.Buttons.Length;
}
if (settings.RadioButtons != null && settings.RadioButtons.Length > 0)
{
radioButtonArray = AllocateAndMarshalButtons(settings.RadioButtons);
settings.NativeConfiguration.pRadioButtons = radioButtonArray;
settings.NativeConfiguration.cRadioButtons = (uint)settings.RadioButtons.Length;
}
}
private void ApplySupplementalSettings(NativeTaskDialogSettings settings)
{
if (progressBar != null)
{
settings.ProgressBarMinimum = progressBar.Minimum;
settings.ProgressBarMaximum = progressBar.Maximum;
settings.ProgressBarState = progressBar.State;
settings.ProgressBarValue = progressBar.Value;
}
else if (marquee != null)
settings.ProgressBarState = marquee.State;
if (HelpInvoked != null)
settings.InvokeHelp = true;
}
private void ApplyElevatedIcons(NativeTaskDialogSettings settings, List<TaskDialogButtonBase> controls)
{
foreach (TaskDialogButton control in controls)
{
if (control.ShowElevationIcon)
{
if (settings.ElevatedButtons == null)
settings.ElevatedButtons = new List<int>();
settings.ElevatedButtons.Add(control.Id);
}
}
}
// Builds the actual configuration that the NativeTaskDialog (and underlying Win32 API)
// expects, by parsing the various control lists, marshalling to the unmgd heap, etc.
private void ApplyControlConfiguration(NativeTaskDialogSettings settings)
{
// Deal with progress bars/marquees
if (marquee != null)
settings.NativeConfiguration.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_SHOW_MARQUEE_PROGRESS_BAR;
else if (progressBar != null)
settings.NativeConfiguration.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_SHOW_PROGRESS_BAR;
// Build the native struct arrays that NativeTaskDialog needs - though NTD will handle
// the heavy lifting marshalling to make sure all the cleanup is centralized there
if (buttons.Count > 0 || commandLinks.Count > 0)
{
// These are the actual arrays/lists of the structs that we'll copy to the
// unmanaged heap
List<TaskDialogButtonBase> sourceList = (
buttons.Count > 0 ? buttons : commandLinks);
settings.Buttons = BuildButtonStructArray(sourceList);
// Apply option flag that forces all custom buttons to render as command links
if (commandLinks.Count > 0)
settings.NativeConfiguration.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_USE_COMMAND_LINKS;
// Set default button and add elevation icons to appropriate buttons
settings.NativeConfiguration.nDefaultButton = FindDefaultButtonId(sourceList);
ApplyElevatedIcons(settings, sourceList);
}
if (radioButtons.Count > 0)
{
settings.RadioButtons = BuildButtonStructArray(radioButtons);
// Set default radio button - radio buttons don't support
int defaultRadioButton = FindDefaultButtonId(radioButtons);
settings.NativeConfiguration.nDefaultRadioButton = defaultRadioButton;
if (defaultRadioButton == NativeMethods.NO_DEFAULT_BUTTON_SPECIFIED)
settings.NativeConfiguration.dwFlags |= NativeMethods.TASKDIALOG_FLAGS.TDF_NO_DEFAULT_RADIO_BUTTON;
}
}
private void ApplyCoreSettings(NativeTaskDialogSettings settings)
{
ApplyGeneralNativeConfiguration(settings.NativeConfiguration);
ApplyTextConfiguration(settings.NativeConfiguration);
ApplyOptionConfiguration(settings.NativeConfiguration);
ApplyControlConfiguration(settings);
}
private TaskDialogResult ShowCore()
{
TaskDialogResult result;
try
{
// Populate control lists, based on current contents - note we are
// somewhat late-bound on our control lists, to support XAML scenarios
SortDialogControls();
// First, let's make sure it even makes sense to try a show
ValidateCurrentDialogSettings();
// Create settings object for new dialog, based on current state
NativeTaskDialogSettings settings = new NativeTaskDialogSettings();
ApplyCoreSettings(settings);
ApplySupplementalSettings(settings);
// Show the dialog.
// NOTE: this is a BLOCKING call; the dialog proc callbacks
// will be executed by the same thread as the Show() call before
// the thread of execution contines to the end of this method.
nativeDialog = new NativeTaskDialog(settings, this);
isShowing = true;
nativeDialog.NativeShow();
// Build and return dialog result to public API - leaving it
// null after an exception is thrown is fine in this case
result = ConstructDialogResult(nativeDialog);
}
finally
{
isShowing = false;
CleanUp();
nativeDialog = null;
}
return result;
}
// Builds the actual configuration that the NativeTaskDialog (and underlying Win32 API)
// expects, by parsing the various control lists, marshalling to the unmgd heap, etc.
private void MarshalDialogControlStructs(NativeTaskDialogSettings settings)
{
if (settings.Buttons != null && settings.Buttons.Length > 0)
{
buttonArray = AllocateAndMarshalButtons(settings.Buttons);
settings.NativeConfiguration.pButtons = buttonArray;
settings.NativeConfiguration.cButtons = (uint)settings.Buttons.Length;
}
if (settings.RadioButtons != null && settings.RadioButtons.Length > 0)
{
radioButtonArray = AllocateAndMarshalButtons(settings.RadioButtons);
settings.NativeConfiguration.pRadioButtons = radioButtonArray;
settings.NativeConfiguration.cRadioButtons = (uint)settings.RadioButtons.Length;
}
}
