private void SetupUI(DocumentScanType scanType)
{
PageTitle.Text = (scanType == DocumentScanType.Text) ? "Extracted Results" : "Recognition Results";
CopyButton.HorizontalOptions = (scanType == DocumentScanType.Text) ? LayoutOptions.End : LayoutOptions.CenterAndExpand;
SpeakButton.IsVisible = (scanType == DocumentScanType.Text);
CopyButton.IsVisible = (scanType == DocumentScanType.Text);
ExportButton.IsVisible = (scanType == DocumentScanType.Document);
}
public DocumentViewerPage(string appDirectory,
string documentsDirectory,
LEADDocument document,
ObservableCollection <DocumentItemData> documents,
OcrOutputFormat sourceDocumentFormat,
OcrOutputFormat outputDocumentFormat,
int documentIndexInList,
DocumentConverterHelper documentConverterHelper,
DocumentScanType scanType,
string pageTitle,
string pageLanguage,
bool allowConversionInsideDocumentViewerPage)
{
MessagingCenter.Subscribe <object, string>(this, "OnSleep", (sender, parameter) =>
{
CancelSpeech();
});
_documents = documents;
_documentIndexInList = documentIndexInList;
_pageLanguage = !string.IsNullOrWhiteSpace(pageLanguage) ? pageLanguage : "en";
_applicationDirectory = appDirectory;
_documentsDirectory = documentsDirectory;
_documentConverterHelper = documentConverterHelper;
SourceDocumentFormat = sourceDocumentFormat;
OutputDocumentFormat = outputDocumentFormat;
AllowConversionInsideDocumentViewerPage = allowConversionInsideDocumentViewerPage;
_cts = new CancellationTokenSource();
InitializeComponent();
if (Device.RuntimePlatform == Device.iOS)
{
HasSystemPadding = false;
}
// Set thumbnails and annotations layouts heights and margins
double bottomMargin = DemoUtilities.Instance.SafeAreaBottom;
double thumbnailsLayoutHeight = DemoUtilities.DisplayHeight * 0.7 - bottomMargin;
double annotationsLayoutHeight = DemoUtilities.DisplayHeight * 0.5 - bottomMargin;
ThumbnailsLayout.Margin = new Thickness(0, 0, 0, bottomMargin);
ThumbnailsLayout.HeightRequest = thumbnailsLayoutHeight;
AnnotationsLayout.Margin = new Thickness(0, 0, 0, bottomMargin);
AnnotationsLayout.HeightRequest = annotationsLayoutHeight;
InitDocumentViewer(scanType);
SetDocument(document);
SetupUI(scanType, pageTitle);
}
private void SetDocument(string documentPath, DocumentScanType scanType)
{
LEADDocument leadDocument = DocumentFactory.LoadFromFile(documentPath, new LoadDocumentOptions()
{
UseCache = false, FirstPageNumber = 1, LastPageNumber = -1, MimeType = (scanType == DocumentScanType.Text) ? "text/plain" : null
});
leadDocument.Text.ImagesRecognitionMode = DocumentTextImagesRecognitionMode.Auto;
leadDocument.Text.TextExtractionMode = DocumentTextExtractionMode.Auto;
// Set it in the document viewer
_documentViewer.SetDocument(leadDocument);
}
// Create the document viewer
private void InitDocumentViewer(string documentPath, DocumentScanType scanType)
{
var createOptions = new DocumentViewerCreateOptions();
// Set the UI part where the main view is displayed
createOptions.ViewContainer = DocumentViewerContainer;
createOptions.UseAnnotations = false;
// Now create the viewer
_documentViewer = DocumentViewerFactory.CreateDocumentViewer(createOptions);
// Set the user name
_documentViewer.UserName = Environment.UserName;
// We prefer SVG viewing (if supported)
_documentViewer.View.PreferredItemType = DocumentViewerItemType.Svg;
var imageViewer = _documentViewer.View.ImageViewer;
if (scanType == DocumentScanType.Document)
{
imageViewer.ScrollOffsetChanged += ImageViewer_ScrollOffsetChanged;
}
imageViewer.BackgroundColor = Color.FromHex("#F5F7FA");
imageViewer.IsFastScrollEnabled = true;
imageViewer.Zoom(ControlSizeMode.FitWidth, 1, imageViewer.DefaultZoomOrigin);
// Helps with debugging of there was a rendering error
imageViewer.RenderError += (sender, e) =>
{
var message = string.Format("Error during render item {0} part {1}: {2}",
e.Item != null ? imageViewer.Items.IndexOf(e.Item) : -1,
e.Part,
e.Error.Message);
System.Diagnostics.Debug.WriteLine(message);
};
_documentViewer.Text.AutoGetText = true;
_documentViewer.Commands.Run(DocumentViewerCommands.InteractiveAutoPan);
// Enable the pan/zoom interactive mode only if the scan type is Document and not Text because
// we want the suer to be able to select text in case of extracted text mode.
if (scanType == DocumentScanType.Document)
{
_documentViewer.Commands.Run(DocumentViewerCommands.InteractivePanZoom);
}
// Enable inertia scroll
ToggleInertiaScroll(true);
SetDocument(documentPath, scanType);
}
public DocumentViewerPage(string documentPath, DocumentScanType scanType, string pageLanguage)
{
InitializeComponent();
#if __IOS__
HasSystemPadding = false;
#endif
_documentPath = documentPath;
_pageLanguage = pageLanguage;
_cts = new CancellationTokenSource();
SetupUI(scanType);
InitDocumentViewer(documentPath, scanType);
}
private void SetupUI(DocumentScanType scanType, string pageTitle)
{
PageTitle.Text = pageTitle;
}
// Create the document viewer
private void InitDocumentViewer(DocumentScanType scanType)
{
var createOptions = new DocumentViewerCreateOptions();
// Set the UI part where the main view is displayed
createOptions.ViewContainer = DocumentViewerContainer;
createOptions.ThumbnailsContainer = ThumbnailsLayout;
createOptions.UseAnnotations = true;
// Now create the viewer
_documentViewer = DocumentViewerFactory.CreateDocumentViewer(createOptions);
// Set the user name
_documentViewer.UserName = Environment.UserName;
// We prefer SVG viewing (if supported)
_documentViewer.View.PreferredItemType = DocumentViewerItemType.Svg;
// Set thumbnail viewer options
ImageViewer thumbnailsImageViewer = _documentViewer.Thumbnails.ImageViewer;
thumbnailsImageViewer.BackgroundColor = Color.Transparent;
thumbnailsImageViewer.ItemHorizontalAlignment = ControlAlignment.Near;
thumbnailsImageViewer.ItemVerticalAlignment = ControlAlignment.Near;
thumbnailsImageViewer.SelectedItemBackgroundColor = Color.FromRgb(80, 131, 242);
_documentViewer.Operation += _documentViewer_Operation;
var imageViewer = _documentViewer.View.ImageViewer;
imageViewer.BackgroundColor = Color.FromHex("#F5F7FA");
#if LEADTOOLS_V21_OR_LATER
imageViewer.IsFastScrollGadgetEnabled = true;
#endif // #if LEADTOOLS_V21_OR_LATER
imageViewer.ViewVerticalAlignment = ControlAlignment.Near;
imageViewer.ViewBorderThickness = 0;
imageViewer.ItemBorderThickness = 0;
imageViewer.ImageBorderThickness = 0;
imageViewer.Zoom(ControlSizeMode.FitWidth, 1, imageViewer.DefaultZoomOrigin);
imageViewer.InteractiveService.KeyDown += InteractiveService_KeyDown;
// By default, document viewer has 11 interactive modes added and we don't need them all in our document viewer page.
// So remove them all exception PanZoom, SelectText and Annotations interactive modes.
ImageViewerPanZoomInteractiveMode panZoomMode = null;
var panZoomModes = imageViewer.InteractiveModes.Where(mode => mode.GetType() == typeof(ImageViewerPanZoomInteractiveMode) && (mode as ImageViewerPanZoomInteractiveMode).EnablePan && (mode as ImageViewerPanZoomInteractiveMode).EnablePinchZoom);
if (panZoomModes != null && panZoomModes.Count() > 0)
{
panZoomMode = panZoomModes.ElementAt(0) as ImageViewerPanZoomInteractiveMode;
}
DocumentViewerSelectTextInteractiveMode selectTextMode = null;
var selectTextModes = imageViewer.InteractiveModes.Where(mode => mode.GetType() == typeof(DocumentViewerSelectTextInteractiveMode));
if (selectTextModes != null && selectTextModes.Count() > 0)
{
selectTextMode = selectTextModes.ElementAt(0) as DocumentViewerSelectTextInteractiveMode;
}
AnnotationsInteractiveMode annotationsMode = null;
var annotationsModes = imageViewer.InteractiveModes.Where(mode => mode.GetType() == typeof(AnnotationsInteractiveMode));
if (annotationsModes != null && annotationsModes.Count() > 0)
{
annotationsMode = annotationsModes.ElementAt(0) as AnnotationsInteractiveMode;
}
imageViewer.BeginUpdate();
imageViewer.InteractiveModes.Clear();
imageViewer.InteractiveModes.Add(annotationsMode);
imageViewer.InteractiveModes.Add(panZoomMode);
imageViewer.InteractiveModes.Add(selectTextMode);
imageViewer.EndUpdate();
// Helps with debugging of there was a rendering error
imageViewer.RenderError += (sender, e) =>
{
var message = string.Format("Error while rendering item {0} part {1}: {2}",
e.Item != null ? imageViewer.Items.IndexOf(e.Item) : -1,
e.Part,
e.Error.Message);
System.Diagnostics.Debug.WriteLine(message);
};
InitAutomation();
_documentViewer.Text.AutoGetText = true;
//_documentViewer.Commands.Run(DocumentViewerCommands.InteractiveAutoPan);
_documentViewer.View.ImageViewer.ScrollOffsetChanged -= ImageViewer_ScrollOffsetChanged;
if (scanType == DocumentScanType.Document)
{
_documentViewer.View.ImageViewer.ScrollOffsetChanged += ImageViewer_ScrollOffsetChanged;
}
// If the scan type is Document enable the pan/zoom interactive mode by default otherwise (Text scan type) enable select text interactive mode by default.
if (scanType == DocumentScanType.Document)
{
_documentViewer.Commands.Run(DocumentViewerCommands.InteractivePanZoom);
_activeInteractiveMode = DocumentViewerCommands.InteractivePanZoom;
}
else
{
_activeInteractiveMode = DocumentViewerCommands.InteractiveSelectText;
}
UpdateUIState();
// Enable inertia scroll
ToggleInertiaScroll(false);
}
