viewLayout Property (original) (raw)
Syntax
Object.defineProperty(ImageViewer.prototype, 'viewLayout',
get: function(),
set: function(value)
)
Property Value
The view layout used by this ImageViewer. The default value is an instance of ImageViewerSingleViewLayout.
Example
This example will add a few items to the ImageViewer and add a button to toggle between a vertical and horizontal layout.
ViewLayout.ts
ImageViewer.ts
ViewLayout.js
ImageViewer.js
ViewLayout.html
import { ImageViewer_Example } from "../ImageViewer";
export class ImageViewer_ViewLayoutExample {
private viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
private run = (viewer: lt.Controls.ImageViewer) => {
let flip: boolean = false;
const setLayout = () => {
flip = !flip;
let layout: lt.Controls.ImageViewerViewLayout;
if (flip) {
layout = new lt.Controls.ImageViewerVerticalViewLayout();
(layout as lt.Controls.ImageViewerVerticalViewLayout).columns = 2;
}
else {
layout = new lt.Controls.ImageViewerHorizontalViewLayout();
(layout as lt.Controls.ImageViewerHorizontalViewLayout).rows = 2;
}
viewer.viewLayout = layout;
}
// Set the initial layout
setLayout();
// Add borders and padding
viewer.viewBorderThickness = 2;
viewer.itemPadding = lt.Controls.ControlPadding.createAll(20);
// Clear the items and add 6 new items
viewer.beginUpdate();
viewer.items.clear();
for (let i = 0; i < 6; i++) {
const item: lt.Controls.ImageViewerItem = new lt.Controls.ImageViewerItem();
item.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
item.text = "Item " + i;
viewer.items.add(item);
}
viewer.endUpdate();
// Zoom out so we can see all the items
viewer.zoom(lt.Controls.ControlSizeMode.fit, .5, viewer.defaultZoomOrigin);
// Add a button to update the layout
const button = document.createElement("button");
button.innerHTML = "Change Layout";
button.onclick = () => {
setLayout();
};
const output = document.getElementById("output");
output.appendChild(button);
}
}
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/js/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_ViewLayoutExample {
viewerExample;
constructor() {
this.viewerExample = new ImageViewer_Example(this.run);
}
run = (viewer) => {
let flip = false;
const setLayout = () => {
flip = !flip;
let layout;
if (flip) {
layout = new lt.Controls.ImageViewerVerticalViewLayout();
(layout).columns = 2;
}
else {
layout = new lt.Controls.ImageViewerHorizontalViewLayout();
(layout).rows = 2;
}
viewer.viewLayout = layout;
}
// Set the initial layout
setLayout();
// Add borders and padding
viewer.viewBorderThickness = 2;
viewer.itemPadding = lt.Controls.ControlPadding.createAll(20);
// Clear the items and add 6 new items
viewer.beginUpdate();
viewer.items.clear();
for (let i = 0; i < 6; i++) {
const item = new lt.Controls.ImageViewerItem();
item.url = "https://demo.leadtools.com/images/jpeg/cannon.jpg";
item.text = "Item " + i;
viewer.items.add(item);
}
viewer.endUpdate();
// Zoom out so we can see all the items
viewer.zoom(lt.Controls.ControlSizeMode.fit, .5, viewer.defaultZoomOrigin);
// Add a button to update the layout
const button = document.createElement("button");
button.innerHTML = "Change Layout";
button.onclick = () => {
setLayout();
};
const output = document.getElementById("output");
output.appendChild(button);
}
}
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/js/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 | ViewLayout</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.ViewLayout();
};
</script>
</html>