// イベントハンドラー
private async void toggleButton_Click(object sender, RibbonControlEventArgs e)
{
try {
if (this.Task == null || this.Task.IsCompleted)
{
var lineArt = this.CreateLineArt();
try {
this.apexCountDropDown.Enabled = false;
this.afterImageCountDropDown.Enabled = false;
int apexCount = (int)this.apexCountDropDown.SelectedItem.Tag;
int afterImageCount = (int)this.afterImageCountDropDown.SelectedItem.Tag;
this.Task = new CancelableTask(canceler => lineArt.Start(apexCount, afterImageCount, canceler));
if (background)
{
this.Task.Start();
await this.Task;
}
else
{
this.Task.RunSynchronously();
}
} finally {
this.Task?.Dispose();
this.Task = null;
if (!this.ApplicationClosed)
{
this.apexCountDropDown.Enabled = true;
this.afterImageCountDropDown.Enabled = true;
this.toggleButton.Enabled = true;
this.toggleButton.Checked = false;
}
}
}
else
{
this.Task.Cancel();
this.toggleButton.Enabled = false;
}
} catch (Exception ex) {
MessageBox.Show(ex.Message);
MessageBox.Show(ex.StackTrace);
}
}
private async void StartButton_Click(object sender, RoutedEventArgs e)
{
int apexCount = this.GetApexCount();
int afterImageCount = this.GetAfterImageCount();
var lineArt = new LineArt(this, this.canvas);
using (this.task = new CancelableTask(canceler => lineArt.Start(apexCount, afterImageCount, canceler))) {
this.startButton.IsEnabled = false;
this.stopButton.IsEnabled = true;
this.apexCountComboBox.IsEnabled = false;
this.afterImageCountComboBox.IsEnabled = false;
this.task.Start();
await this.task;
this.canvas.Children.OfType <System.Windows.Shapes.Line>().ToList().ForEach(this.canvas.Children.Remove);
this.startButton.IsEnabled = true;
this.stopButton.IsEnabled = false;
this.apexCountComboBox.IsEnabled = true;
this.afterImageCountComboBox.IsEnabled = true;
}
}