CreateDocumentViewer Method (original) (raw)
Summary
Creates a new instance of DocumentViewer from the specified options.
Syntax
Parameters
createOptions
Options to use when creating DocumentViewer. This parameter cannot be null.
Return Value
The new DocumentViewer object.
Example
using Leadtools;
using Leadtools.Controls;
using Leadtools.Document;
using Leadtools.Document.Viewer;
using Leadtools.Codecs;
using Leadtools.Caching;
using Leadtools.Annotations.Engine;
using Leadtools.Ocr;
public void DocumentViewer_Example()
{
// New Form to be used as our application
var form = new MyForm();
form.ShowDialog();
}
class MyForm : Form
{
public MyForm()
{
this.Size = new Size(800, 800);
this.Text = "LEADTOOLS Document Viewer Example";
}
protected override void OnLoad(EventArgs e)
{
if (!DesignMode)
{
// Init OCR. This is optional and not required for the PDF document we are loading.
// But if image documents are loaded and text functionality is used, then we need OCR
_ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD);
_ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS22\Bin\Common\OcrLEADRuntime");
Init();
}
base.OnLoad(e);
}
// Our document viewer instance
private DocumentViewer _documentViewer;
// Optional OCR engine to use in the example
private IOcrEngine _ocrEngine;
private void Init()
{
// Initialize the user interface
InitUI();
// Init the cache. This is optional, but it can speed up viewing of large documents
// if not needed, remove this section
DocumentFactory.Cache = new FileCache();
// Init the document viewer, pass along the panels
var createOptions = new DocumentViewerCreateOptions
{
// The middle panel for the view
ViewContainer = this.Controls.Find("middlePanel", false)[0],
// The left panel for the thumbnails
ThumbnailsContainer = this.Controls.Find("leftPanel", false)[0],
// The right panel is for bookmarks
BookmarksContainer = this.Controls.Find("rightPanel", false)[0],
// Not using annotations for now
UseAnnotations = false
};
// Create the document viewer
_documentViewer = DocumentViewerFactory.CreateDocumentViewer(createOptions);
// We prefer SVG viewing
_documentViewer.View.PreferredItemType = DocumentViewerItemType.Svg;
// Load a document
var fileName = @"C:\LEADTOOLS22\Resources\Images\Leadtools.pdf";
var document = DocumentFactory.LoadFromFile(
fileName,
new LoadDocumentOptions { UseCache = DocumentFactory.Cache != null });
_documentViewer.Operation += (sender, e) =>
{
if (e.Operation == DocumentViewerOperation.LoadingBookmarks)
{
// Disable the bookmarks when we are loading, enable when we are done
var rightPanel = this.Controls.Find("rightPanel", true)[0];
if (rightPanel.InvokeRequired)
{
rightPanel.Invoke((MethodInvoker)delegate { rightPanel.Enabled = e.IsPostOperation; });
}
else
{
rightPanel.Enabled = e.IsPostOperation;
}
}
};
// If we have an OCR engine, use it
document.Text.OcrEngine = _ocrEngine;
// Set it in the viewer
_documentViewer.SetDocument(document);
// Run pan/zoom
var interactiveComboBox = this.Controls.Find("interactiveComboBox", true)[0] as ComboBox;
interactiveComboBox.SelectedItem = DocumentViewerCommands.InteractivePanZoom;
}
private void InitUI()
{
// Add a panel on the left for the document viewer thumbnails part
var leftPanel = new Panel();
leftPanel.Name = "leftPanel";
leftPanel.Width = 200;
leftPanel.Dock = DockStyle.Left;
leftPanel.BackColor = Color.Gray;
leftPanel.BorderStyle = BorderStyle.FixedSingle;
this.Controls.Add(leftPanel);
// Add a panel to the right, this will work for the bookmarks or annotations part
var rightPanel = new Panel();
rightPanel.Name = "rightPanel";
rightPanel.Width = 200;
rightPanel.Dock = DockStyle.Right;
rightPanel.BackColor = Color.LightBlue;
rightPanel.BorderStyle = BorderStyle.FixedSingle;
this.Controls.Add(rightPanel);
// Add a panel to fill the rest, for the document viewer
var middlePanel = new Panel();
middlePanel.Name = "middlePanel";
middlePanel.BackColor = Color.DarkGray;
middlePanel.BorderStyle = BorderStyle.None;
middlePanel.Dock = DockStyle.Fill;
this.Controls.Add(middlePanel);
// Add a top panel to host our application controls
var topPanel = new Panel();
topPanel.Name = "topPanel";
topPanel.Height = 100;
topPanel.Dock = DockStyle.Top;
topPanel.BorderStyle = BorderStyle.FixedSingle;
this.Controls.Add(topPanel);
middlePanel.BringToFront();
// Add buttons for the UI
// Combo box for interactive modes
var interactiveComboBox = new ComboBox();
interactiveComboBox.Name = "interactiveComboBox";
interactiveComboBox.DropDownStyle = ComboBoxStyle.DropDownList;
// The command names for the items so we can just run them
interactiveComboBox.Items.Add(DocumentViewerCommands.InteractivePanZoom);
interactiveComboBox.Items.Add(DocumentViewerCommands.InteractiveSelectText);
interactiveComboBox.SelectedIndexChanged += (sender, e) =>
{
var commandName = interactiveComboBox.SelectedItem as string;
_documentViewer.Commands.Run(commandName);
};
topPanel.Controls.Add(interactiveComboBox);
// Generic label for information used by the examples
var infoLabel = new Label();
infoLabel.Name = "infoLabel";
infoLabel.Text = "Info...";
infoLabel.AutoSize = false;
infoLabel.Width = 400;
infoLabel.Left = interactiveComboBox.Right + 20;
topPanel.Controls.Add(infoLabel);
var exampleButton = new Button();
exampleButton.Top = interactiveComboBox.Bottom + 2;
exampleButton.Name = "exampleButton";
exampleButton.Text = "&Example";
exampleButton.Click += (sender, e) => Example(exampleButton);
topPanel.Controls.Add(exampleButton);
}
private void Example(Button exampleButton)
{
// Add the example code here
Console.WriteLine(this + " Ready");
}
}