/// <summary>
 /// ストップボタン押下
 /// </summary>
 /// <param name="parameter"></param>
 private void stopExecute(object parameter)
 {
     isExecuting = false;
     captureImageWindow.Close();
     captureImageWindow = null;
 }
        /// <summary>
        /// Dropイベント
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void drop(object sender, DragEventArgs e)
        {
            string[] images = e.Data.GetData(DataFormats.FileDrop) as string[];
            if (images == null) return;

            // キャプチャ中なら停止する
            if (captureImageWindow != null)
            {
                captureImageWindow.Close();
                captureImageWindow = null;
            }
            if (isExecuting)
            {
                isExecuting = false;
            }

            // ヒストグラムを計算
            Bitmap image = new Bitmap(images[0]);
            UInt32[] histogram = calcHistogram(image);

            // ヒストグラム表示
            chart.ChartAreas.Clear();
            chart.ChartAreas.Add("ChartArea1");
            Series series = new Series();
            series.ChartType = SeriesChartType.Column;
            series.MarkerStyle = MarkerStyle.None;
            for (int i = 0; i < histogram.Length; i++)
            {
                series.Points.AddXY((double)i, (double)histogram[i]);
            }
            chart.Series.Clear();
            chart.Series.Add(series);

            // X軸の設定
            chart.ChartAreas["ChartArea1"].AxisX.Minimum = 0;
            chart.ChartAreas["ChartArea1"].AxisX.Maximum = 255;
            chart.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;

            // Y軸の設定
            if (ScaleY != 0)
            {
                chart.ChartAreas["ChartArea1"].AxisY.Minimum = 0;
                chart.ChartAreas["ChartArea1"].AxisY.Maximum = ScaleY;
            }
            chart.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
            chart.ChartAreas["ChartArea1"].AxisY.Enabled = AxisEnabled.False;

            // 画像を表示
            CaptureImage = getBitmapImage(image);
            image.Dispose();

            // 子Windows表示
            captureImageWindow = new CaptureImageWindow(this);
            captureImageWindow.Show();
        }
        /// <summary>
        /// スタートボタン押下
        /// </summary>
        /// <param name="parameter"></param>
        private void startExecute(object parameter)
        {
            isExecuting = true;
            Task.Run(() => 
            {
                Bitmap screen;
                Graphics g;
                UInt32[] histo;

                while (isExecuting)
                {
                    // スクリーンキャプチャ(70ms)
                    selectedWindowRect = wm.GetWindowRectangle(SelectedProcess);
                    if (selectedWindowRect == Rectangle.Empty)
                    {
                        isExecuting = false;
                        App.Current.Dispatcher.Invoke(() => 
                        {
                            captureImageWindow.Close();
                            captureImageWindow = null;
                            RaiseCanExecuteChanged();
                        });
                        
                        break;
                    }
                    UpdatePosition();
                    Rectangle captureRect = new Rectangle(selectedWindowRect.X + OffsetX, selectedWindowRect.Y + OffsetY, Width, Width / 2);
                    screen = new Bitmap(captureRect.Width, captureRect.Height, PixelFormat.Format32bppArgb);
                    g = Graphics.FromImage(screen);
                    g.CopyFromScreen(captureRect.X, captureRect.Y, 0, 0, screen.Size);
                    g.Dispose();

                    // 輝度計算(25ms)
                    histo = calcHistogram(screen);

                    // チャート表示(0ms)
                    App.Current.Dispatcher.Invoke(() => 
                    {
                        chart.ChartAreas.Clear();
                        chart.ChartAreas.Add("ChartArea1");
                        Series series = new Series();
                        series.ChartType = SeriesChartType.Column;
                        series.MarkerStyle = MarkerStyle.None;
                        for (int i = 0; i < histo.Length; i++)
                        {
                            series.Points.AddXY((double)i, (double)histo[i]);
                        }
                        chart.Series.Clear();
                        chart.Series.Add(series);

                        // X軸の設定
                        chart.ChartAreas["ChartArea1"].AxisX.Minimum = 0;
                        chart.ChartAreas["ChartArea1"].AxisX.Maximum = 255;
                        chart.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;

                        // Y軸の設定
                        if (ScaleY != 0)
                        {
                            chart.ChartAreas["ChartArea1"].AxisY.Minimum = 0;
                            chart.ChartAreas["ChartArea1"].AxisY.Maximum = ScaleY;
                        }
                        chart.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
                        chart.ChartAreas["ChartArea1"].AxisY.Enabled = AxisEnabled.False;
                    });

                    // キャプチャ画像表示
                    CaptureImage = getBitmapImage(screen);
                    screen.Dispose();

                    Thread.Sleep(100);
                }

                // 停止したらヒストグラムを消す
                App.Current.Dispatcher.Invoke(() => 
                {
                    chart.ChartAreas.Clear();
                    chart.Series.Clear();
                });
            });

            captureImageWindow = new CaptureImageWindow(this);
            captureImageWindow.Show();
        }