Object.defineProperty(ImageViewer.prototype, 'interpolationMode',
get: function(),
set: function(value)
)
interpolationMode: InterpolationMode;
The interpolation mode used by this ImageViewer. The default value is InterpolationMode.None.
In the below demo, click the "example" button to load document pages that will run interpolation and display status information about the interpolation for each page.
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_InterpolationModeExample {
private viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
private run = (viewer: lt.Controls.ImageViewer) => {
// NOTE: in order for this example to work, you must include the image processing scripts in a directory:
lt.Controls.ImageViewer.imageProcessingLibrariesPath = "../LT";
const _interpolationModeNames: string[] = ["None", "Resample", "ScaleToGray"];
const _interpolationModeStatus: string[] = ["Started", "Completed", "Aborted", "Error"];
const urls: string[] = [
"http://demo.leadtools.com/images/png/ocr1.png",
"http://demo.leadtools.com/images/png/ocr2.png",
"http://demo.leadtools.com/images/png/ocr3.png",
"http://demo.leadtools.com/images/png/ocr4.png"
];
// Optional: tell the imageViewer to interpolate in parallel
viewer.interpolationRunMode = lt.Controls.InterpolationRunMode.parallel;
// Begin updating the imageviewer (stops rendering until endUpdate is called)
viewer.beginUpdate();
viewer.items.clear();
viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout();
viewer.itemBorderThickness = 5;
viewer.itemMargin = lt.Controls.ControlPadding.createAll(5);
for (let urlIndex = 0; urlIndex < urls.length; urlIndex++) {
const item: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem();
item.text = "Item" + urlIndex;
item.url = urls[urlIndex];
viewer.items.add(item);
}
viewer.endUpdate();
viewer.interpolation.add((sender, e) => {
let lines = [];
const itemIndex: number = viewer.items.indexOf(e.item);
lines.push("Item " + itemIndex + " " + _interpolationModeNames[e.mode] + ": " + _interpolationModeStatus[e.status]);
if (e.status === lt.Controls.InterpolationStatus.error) {
lines.push(" Error name:" + e.error.name + " message:" + e.error.message);
}
addLines(lines);
});
const output = document.getElementById("output");
// Add a select to show the interpolation options
const select = document.createElement("select");
output.appendChild(select);
const interpolationModes: lt.Controls.InterpolationMode[] = [lt.Controls.InterpolationMode.none, lt.Controls.InterpolationMode.resample, lt.Controls.InterpolationMode.scaleToGray];
for (let index = 0; index < interpolationModes.length; index++) {
const value: lt.Controls.InterpolationMode = interpolationModes[index];
const option = document.createElement("option");
option.innerHTML = _interpolationModeNames[value];
select.appendChild(option);
}
select.addEventListener("change", () => {
const index: number = select.selectedIndex;
switch (index) {
case 0:
viewer.interpolationMode = lt.Controls.InterpolationMode.none;
break;
case 1:
viewer.interpolationMode = lt.Controls.InterpolationMode.resample;
break;
case 2:
viewer.interpolationMode = lt.Controls.InterpolationMode.scaleToGray;
break;
}
});
// Start with resample
select.selectedIndex = lt.Controls.InterpolationMode.resample;
viewer.interpolationMode = lt.Controls.InterpolationMode.resample;
const textOutput = document.createElement("div");
output.appendChild(textOutput);
const addLines = (messages) => {
const lines: string = messages.map((line) => { return "<p>" + line + "</p>" });
textOutput.innerHTML += lines;
}
}
}
export class ImageViewer_Example {
// LEADTOOLS ImageViewer to be used with this example
protected imageViewer: lt.Controls.ImageViewer = null;
// Generic state value used by the examples
public timesClicked: number = 0;
constructor(callback?: (viewer: lt.Controls.ImageViewer) => void) {
// Set the LEADTOOLS license. Replace this with your actual license file
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/v200/LEADTOOLSEVAL.txt", "EVAL", null);
// Create an image viewer inside the imageViewerDiv element
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions: lt.Controls.ImageViewerCreateOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
this.imageViewer = new lt.Controls.ImageViewer(createOptions);
this.imageViewer.viewVerticalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.viewHorizontalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.autoCreateCanvas = true;
// Add Pan/Zoom interactive mode
// Click and drag to pan, CTRL-Click and drag to zoom in and out
this.imageViewer.interactiveModes.add(new lt.Controls.ImageViewerPanZoomInteractiveMode());
// Load an image
this.imageViewer.imageUrl = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
this.imageViewer.zoom(lt.Controls.ControlSizeMode.fit, .9, this.imageViewer.defaultZoomOrigin);
const exampleButton = document.getElementById("exampleButton");
exampleButton.addEventListener("click", () => {
this.timesClicked++;
// Run the example
if (callback)
callback(this.imageViewer);
});
}
}
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_InterpolationModeExample {
viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
run = (viewer) => {
// NOTE: in order for this example to work, you must include the image processing scripts in a directory:
lt.Controls.ImageViewer.imageProcessingLibrariesPath = "../LT";
const _interpolationModeNames = ["None", "Resample", "ScaleToGray"];
const _interpolationModeStatus = ["Started", "Completed", "Aborted", "Error"];
const urls = [
"http://demo.leadtools.com/images/png/ocr1.png",
"http://demo.leadtools.com/images/png/ocr2.png",
"http://demo.leadtools.com/images/png/ocr3.png",
"http://demo.leadtools.com/images/png/ocr4.png"
];
// Optional: tell the imageViewer to interpolate in parallel
viewer.interpolationRunMode = lt.Controls.InterpolationRunMode.parallel;
// Begin updating the imageviewer (stops rendering until endUpdate is called)
viewer.beginUpdate();
viewer.items.clear();
viewer.viewLayout = new lt.Controls.ImageViewerVerticalViewLayout();
viewer.itemBorderThickness = 5;
viewer.itemMargin = lt.Controls.ControlPadding.createAll(5);
for (let urlIndex = 0; urlIndex < urls.length; urlIndex++) {
const item = new lt.Controls.ImageViewerItem();
item.text = "Item" + urlIndex;
item.url = urls[urlIndex];
viewer.items.add(item);
}
viewer.endUpdate();
viewer.interpolation.add((sender, e) => {
let lines = [];
const itemIndex = viewer.items.indexOf(e.item);
lines.push("Item " + itemIndex + " " + _interpolationModeNames[e.mode] + ": " + _interpolationModeStatus[e.status]);
if (e.status === lt.Controls.InterpolationStatus.error) {
lines.push(" Error name:" + e.error.name + " message:" + e.error.message);
}
addLines(lines);
});
const output = document.getElementById("output");
// Add a select to show the interpolation options
const select = document.createElement("select");
output.appendChild(select);
const interpolationModes = [lt.Controls.InterpolationMode.none, lt.Controls.InterpolationMode.resample, lt.Controls.InterpolationMode.scaleToGray];
for (let index = 0; index < interpolationModes.length; index++) {
const value = interpolationModes[index];
const option = document.createElement("option");
option.innerHTML = _interpolationModeNames[value];
select.appendChild(option);
}
select.addEventListener("change", () => {
const index = select.selectedIndex;
switch (index) {
case 0:
viewer.interpolationMode = lt.Controls.InterpolationMode.none;
break;
case 1:
viewer.interpolationMode = lt.Controls.InterpolationMode.resample;
break;
case 2:
viewer.interpolationMode = lt.Controls.InterpolationMode.scaleToGray;
break;
}
});
// Start with resample
select.selectedIndex = lt.Controls.InterpolationMode.resample;
viewer.interpolationMode = lt.Controls.InterpolationMode.resample;
const textOutput = document.createElement("div");
output.appendChild(textOutput);
const addLines = (messages) => {
const lines = messages.map((line) => { return "<p>" + line + "</p>" });
textOutput.innerHTML += lines;
}
}
}
export class ImageViewer_Example {
// LEADTOOLS ImageViewer to be used with this example
imageViewer = null;
// Generic state value used by the examples
timesClicked = 0;
constructor(callback) {
// Set the LEADTOOLS license. Replace this with your actual license file
lt.RasterSupport.setLicenseUri("https://demo.leadtools.com/licenses/v200/LEADTOOLSEVAL.txt", "EVAL", null);
// Create an image viewer inside the imageViewerDiv element
const imageViewerDiv = document.getElementById("imageViewerDiv");
const createOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
this.imageViewer = new lt.Controls.ImageViewer(createOptions);
this.imageViewer.viewVerticalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.viewHorizontalAlignment = lt.Controls.ControlAlignment.center;
this.imageViewer.autoCreateCanvas = true;
// Add Pan/Zoom interactive mode
// Click and drag to pan, CTRL-Click and drag to zoom in and out
this.imageViewer.interactiveModes.add(new lt.Controls.ImageViewerPanZoomInteractiveMode());
// Load an image
this.imageViewer.imageUrl = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
this.imageViewer.zoom(lt.Controls.ControlSizeMode.fit, .9, this.imageViewer.defaultZoomOrigin);
const exampleButton = document.getElementById("exampleButton");
exampleButton.addEventListener("click", () => {
this.timesClicked++;
// Run the example
if (callback)
callback(this.imageViewer);
});
}
}
<!doctype html>
<html lang="en">
<title>Controls Example | InterpolationMode</title>
<head>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"
integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script src="../../LT/Leadtools.js"></script>
<script src="../../LT/Leadtools.Controls.js"></script>
<script src="../../LT/Leadtools.Annotations.Engine.js"></script>
<script src="../../LT/Leadtools.Annotations.Designers.js"></script>
<script src="../../LT/Leadtools.Annotations.Rendering.Javascript.js"></script>
<script src="../../LT/Leadtools.Annotations.Automation.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Main.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Color.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Core.js"></script>
<script src="../../LT/Leadtools.ImageProcessing.Effects.js"></script>
<script src="../../LT/Leadtools.Document.js"></script>
<script src="../../LT/Leadtools.Document.Viewer.js"></script>
<style>
body {
font-family: 'Segoe UI', sans-serif;
}
#imageViewerDiv {
border: 1px solid #888;
width: 500px;
height: 500px;
background-color: #eee;
}
</style>
<!-- All demo files are bundled and appended to the window -->
<script src="../../bundle.js" type="text/javascript"></script>
</head>
<body>
<p>Press and drag on the image to pan.</p>
<p>Hold down the control key and press and drag on the image or pinch with two fingers to zoom in and out.</p>
<div>
<button type="button" id="exampleButton">Run Example</button>
</div>
<div id="imageViewerDiv"></div>
<div id="output"></div>
</body>
<script>
window.onload = () => {
const example = new window.examples.ImageViewer.InterpolationMode();
};
</script>
</html>
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