private void AutoCrop(AttachmentDialogImageItem img)
{
CannyEdgeDetector edgeDetector = new CannyEdgeDetector(img.Bitmap, 20, 80, 30);
edgeDetector.DetectEdges();
Rect bounds = edgeDetector.EdgeBounds;
AddResizer(img, bounds);
SetDirty();
}
private void OnCropImage(object sender, ExecutedRoutedEventArgs e)
{
AttachmentDialogImageItem img = this.selected as AttachmentDialogImageItem;
if (img == null)
{
return;
}
AutoCrop(img);
}
private void RotateLeft(object sender, ExecutedRoutedEventArgs e)
{
AttachmentDialogImageItem img = this.selected as AttachmentDialogImageItem;
if (img == null)
{
return;
}
img.RotateImage(-90.0);
OnItemChanged(img);
}
private void Scan(object sender, RoutedEventArgs e)
{
try
{
AppBarButton button = sender as AppBarButton;
// hmmm, reusing the device doesn't work because it somehow resets itself to capture higher resolution images.
bool hasDevice = false; // device != null;
GetScannerAsync(new Action(() =>
{
WIA.ImageFile imageFile = null;
if (!hasDevice)
{
imageFile = globalDialog.ShowAcquireImage(DeviceType: WIA.WiaDeviceType.ScannerDeviceType,
Bias: WIA.WiaImageBias.MinimizeSize, Intent: WIA.WiaImageIntent.TextIntent, AlwaysSelectDevice: false);
}
else
{
WIA.Item scannerItem = device.Items[1];
const string wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}";
object scanResult = globalDialog.ShowTransfer(scannerItem, wiaFormatPNG, false);
imageFile = (WIA.ImageFile)scanResult;
}
if (imageFile != null)
{
string temp = System.IO.Path.GetTempFileName();
if (File.Exists(temp))
{
File.Delete(temp);
}
imageFile.SaveFile(temp);
TempFilesManager.AddTempFile(temp);
AttachmentDialogImageItem image = new AttachmentDialogImageItem(temp);
AddItem(image);
LayoutContent();
SelectItem(image);
AutoCrop(image);
}
}));
}
catch (Exception ex)
{
device = null;
string message = GetWiaErrorMessage(ex);
MessageBox.Show(this, message, "Scan Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
private void Save(object sender, ExecutedRoutedEventArgs e)
{
try
{
int index = 0;
foreach (UIElement element in Canvas.Children)
{
AttachmentDialogItem item = element as AttachmentDialogItem;
if (item != null)
{
string fileName = Manager.GetUniqueFileName(this.Transaction, item.FileExtension);
string existing = item.FileName;
if (!string.IsNullOrEmpty(existing) && string.Compare(fileName, existing, StringComparison.OrdinalIgnoreCase) != 0)
{
// file name is different, so delete the old file.
TempFilesManager.DeleteFile(existing);
}
AttachmentDialogImageItem img = item as AttachmentDialogImageItem;
if (img != null)
{
if (item == selected && resizer != null)
{
// crop it.
Rect bounds = GetUnscaledBounds(resizer.Bounds);
img.Resize(bounds);
}
}
// in case an item was deleted in the middle, we need to re-index the items.
item.Save(fileName);
item.FileName = fileName;
index++;
}
}
ClearSelection();
LoadAttachments();
dirty = false;
}
catch (Exception ex)
{
MessageBox.Show(this, "Unexpected error saving new image: " + ex.Message, "Save Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
private void Paste(object sender, ExecutedRoutedEventArgs e)
{
AttachmentDialogItem newItem = null;
if (Clipboard.ContainsImage())
{
var image = Clipboard.GetImage();
if (image != null)
{
// for some reason this bitmap doesn't paint unless I save and reload it
// the in-memory copy from the clipboard is a bit touchy, probably comes from
// another process and so on, so persistence is better strategy here...
string path = Path.GetTempFileName();
AttachmentDialogImageItem item = new AttachmentDialogImageItem(image);
item.Save(path);
TempFilesManager.AddTempFile(path);
newItem = new AttachmentDialogImageItem(path);
}
}
else if (Clipboard.ContainsData(DataFormats.XamlPackage) ||
Clipboard.ContainsData(DataFormats.Rtf) ||
Clipboard.ContainsData(DataFormats.Text))
{
newItem = new AttachmentDialogDocumentItem(Clipboard.GetDataObject());
}
if (newItem != null)
{
AddItem(newItem);
LayoutContent();
SelectItem(newItem);
SetDirty();
}
}
