System.Windows.Forms.ThemeWin32Classic.CalculateCheckBoxAutoSize C# (CSharp) Method

		public override Size CalculateCheckBoxAutoSize (CheckBox checkBox)
		{
			Size ret_size = Size.Empty;
			Size text_size = TextRenderer.MeasureTextInternal (checkBox.Text, checkBox.Font, checkBox.UseCompatibleTextRendering);
			Size image_size = checkBox.Image == null ? Size.Empty : checkBox.Image.Size;

			// Pad the text size
			if (checkBox.Text.Length != 0) {
				text_size.Height += 4;
				text_size.Width += 4;
			}

			switch (checkBox.TextImageRelation) {
				case TextImageRelation.Overlay:
					ret_size.Height = Math.Max (checkBox.Text.Length == 0 ? 0 : text_size.Height, image_size.Height);
					ret_size.Width = Math.Max (text_size.Width, image_size.Width);
					break;
				case TextImageRelation.ImageAboveText:
				case TextImageRelation.TextAboveImage:
					ret_size.Height = text_size.Height + image_size.Height;
					ret_size.Width = Math.Max (text_size.Width, image_size.Width);
					break;
				case TextImageRelation.ImageBeforeText:
				case TextImageRelation.TextBeforeImage:
					ret_size.Height = Math.Max (text_size.Height, image_size.Height);
					ret_size.Width = text_size.Width + image_size.Width;
					break;
			}

			// Pad the result
			ret_size.Height += (checkBox.Padding.Vertical);
			ret_size.Width += (checkBox.Padding.Horizontal) + 15;

			// There seems to be a minimum height
			if (ret_size.Height == checkBox.Padding.Vertical)
				ret_size.Height += 14;
				
			return ret_size;
		}