internal void UpdateProgressBarRange()
{
AssertCurrentlyShowing();
// Build range LPARAM - note it is in REVERSE intuitive order.
long range = NativeTaskDialog.MakeLongLParam(
settings.ProgressBarMaximum,
settings.ProgressBarMinimum);
SendMessageHelper(SafeNativeMethods.TASKDIALOG_MESSAGES.TDM_SET_PROGRESS_BAR_RANGE, 0, range);
}
// Analyzes the final state of the NativeTaskDialog instance and creates the
// final TaskDialogResult that will be returned from the public API
private TaskDialogResult ConstructDialogResult(NativeTaskDialog nativeDialog)
{
Debug.Assert(nativeDialog.ShowState == NativeDialogShowState.Closed, "dialog result being constructed for unshown dialog");
string customButton = null;
string radioButton = null;
bool checkBoxChecked = false;
TaskDialogButtonBase button;
TaskDialogStandardButton standardButton = MapButtonIdToStandardButton(nativeDialog.SelectedButtonID);
// If returned ID isn't a standard button, let's fetch
if (standardButton == TaskDialogStandardButton.None)
{
button = GetButtonForId(nativeDialog.SelectedButtonID);
if (button == null)
throw new InvalidOperationException("received bad control ID from Win32 callback");
customButton = button.Name;
}
// If there were radio buttons and one was selected, figure out which one
if (radioButtons.Count > 0 && nativeDialog.SelectedRadioButtonID != NativeMethods.NO_DEFAULT_BUTTON_SPECIFIED)
{
button = GetButtonForId(nativeDialog.SelectedRadioButtonID);
if (button == null)
throw new InvalidOperationException("received bad control ID from Win32 callback");
radioButton = button.Name;
}
checkBoxChecked = nativeDialog.CheckBoxChecked;
return new TaskDialogResult(
standardButton,
customButton,
radioButton,
checkBoxChecked);
}
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;
}
