Adds a new item from an HTML5 Canvas Element.
Source HTML5 Canvas Element.
The resolution to use for the image in dots/inch (DPI). A value of 0,0 or Empty means to use the default image resolution of 96 pixels.
The newly created item, if successful.
This method allows you to quickly add an item from an HTML5 Canvas Element. It is the equivalent of the following code:
var item = new lt.Controls.ImageViewerItem();
item.canvas = canvas;
item.resolution = resolution; // Optional
AddFromElement can be used as a shortcut for AddFromCanvas or AddFromImage. Passing a valid HTML5 Canvas Element to AddFromElement will create an ImageViewerItem with the Canvas property set, just as it does with AddFromCanvas. Similarly, passing a valid HTML Image Element to AddFromElement will create an ImageViewerItem with the Image property set, just as it does with AddFromImage. The item can have a value in only one of Image, Element or Canvas. Setting one value will automatically delete the values of the others.
If canvas is null, then an empty item is added.
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.fillStyle = "rgba(0, 0, 255, .5)";
context.fillRect(25, 25, 125, 125);
this._imageViewer.items.addFromCanvas(canvas, lt.LeadSizeD.create(96, 96));
Medical Web Viewer .NET