private bool IsValidItem(HistoryItem item)
{
return(item != null && !string.IsNullOrEmpty(item.Code) && !string.IsNullOrEmpty(item.NewPrice));
}
private void SaveImageToClipboard(HistoryItem item)
{
Clipboard.SetImage(ImageHelper.ConvertToBitmapSource(imgPreview));
AddToHistory(item);
}
private void SaveImage(HistoryItem item)
{
ImageHelper.SaveToPng(imgPreview, DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".png");
AddToHistory(item);
}
private DrawingImage DrawPreview(HistoryItem item)
{
DrawingGroup drawingGroup = new DrawingGroup();
// Background: Product image
BitmapImage image = new BitmapImage(new Uri(currentItem.ImageSource, UriKind.Relative));
ImageDrawing imageDrawing = new ImageDrawing(image, new Rect(0, 0, image.Width, image.Height));
imageDrawing.Freeze();
drawingGroup.Children.Add(imageDrawing);
// Rectangle in the center
GeometryDrawing rectangle = new GeometryDrawing();
double rectRatio = 0.5;
double rectWidth = image.Width * rectRatio;
double rectHeight = image.Height * rectRatio;
double rectX = (image.Width - rectWidth) / 2;
double rectY = (image.Height - rectHeight) / 2;
var rectangleBrush = new SolidColorBrush(Colors.Gray);
rectangleBrush.Opacity = 0.7;
rectangle.Brush = rectangleBrush;
rectangle.Geometry = new RectangleGeometry(new Rect(rectX, rectY, rectWidth, rectHeight));
drawingGroup.Children.Add(rectangle);
double fontSize = image.Width * 0.08;
double lineHeight = fontSize * 1.2;
double textX = rectX + fontSize / 10;
double textY = rectY + lineHeight / 10;
// Text inside rectangle
DrawingVisual visual = new DrawingVisual();
using (var context = visual.RenderOpen())
{
context.DrawText(new FormattedText(item.TimeStamp.ToString("dd/MM/yyyy")
, CultureInfo.InvariantCulture
, FlowDirection.LeftToRight
, new Typeface("Arial")
, fontSize
, Brushes.White
, VisualTreeHelper.GetDpi(this).PixelsPerDip), new Point(textX, textY));
context.DrawText(new FormattedText((!string.IsNullOrEmpty(item.OldPrice)? item.OldPrice + " => " : "") + item.NewPrice
, CultureInfo.InvariantCulture
, FlowDirection.LeftToRight
, new Typeface("Arial")
, fontSize
, Brushes.White
, VisualTreeHelper.GetDpi(this).PixelsPerDip), new Point(textX, textY + lineHeight));
if (!string.IsNullOrEmpty(item.Note))
{
context.DrawText(new FormattedText(item.Note
, CultureInfo.InvariantCulture
, FlowDirection.LeftToRight
, new Typeface("Arial")
, fontSize
, Brushes.White
, VisualTreeHelper.GetDpi(this).PixelsPerDip), new Point(textX, textY + 2 * lineHeight));
}
}
drawingGroup.Children.Add(visual.Drawing);
DrawingImage drawingImage = new DrawingImage(drawingGroup);
return(drawingImage);
}
