AddonHelper.FormEditor.timerSet_Tick C# (CSharp) Метод

        private void timerSet_Tick(object sender, EventArgs e)
        {
            if (buttonCover.Checked || buttonCrop.Checked) {
                this.boxPreview.Location = new Point(this.previewRect.X + this.Stage.Left, this.previewRect.Y + this.Stage.Top);
                this.boxPreview.Size = this.previewRect.Size;

                if (this.previewRect.Width > 0 && this.previewRect.Height > 0) {
                    Bitmap rectBmp = new Bitmap(this.previewRect.Width, this.previewRect.Height);
                    Graphics rectGfx = Graphics.FromImage(rectBmp);

                    rectGfx.DrawImage(this.img, new Rectangle(0, 0, this.previewRect.Width, this.previewRect.Height), this.previewRect, GraphicsUnit.Pixel);
                    Pen rectPen = new Pen(this.currentColor, 5);
                    rectGfx.DrawRectangle(rectPen, new Rectangle(0, 0, this.previewRect.Width, this.previewRect.Height));

                    this.boxPreview.Image = rectBmp;
                }
            }

            if (buttonDraw.Checked) {
                if (this.drawLines.Count > 1) {
                    g.DrawLines(new Pen(this.currentColor, 4), this.drawLines.ToArray());
                    Point lastPoint = this.drawLines.Last();
                    this.drawLines.Clear();
                    this.drawLines.Add(lastPoint);
                }
            }

            this.Stage.Image = img;
        }