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https://github.com/openseadragon/openseadragon.git
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Add coordinates conversion methods to TiledImage.
This commit is contained in:
Antoine Vandecreme
parent
300cf6e777
commit
aa021d87c0
@ -406,6 +406,83 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
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);
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},
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/**
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* Convert pixel coordinates relative to the viewer element to image
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* coordinates.
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* @param {OpenSeadragon.Point} pixel
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* @returns {OpenSeadragon.Point}
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*/
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viewerElementToImageCoordinates: function( pixel ) {
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var point = this.viewport.pointFromPixel( pixel, true );
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return this.viewportToImageCoordinates( point );
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},
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/**
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* Convert pixel coordinates relative to the image to
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* viewer element coordinates.
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* @param {OpenSeadragon.Point} pixel
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* @returns {OpenSeadragon.Point}
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*/
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imageToViewerElementCoordinates: function( pixel ) {
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var point = this.imageToViewportCoordinates( pixel );
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return this.viewport.pixelFromPoint( point, true );
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},
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/**
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* Convert pixel coordinates relative to the window to image coordinates.
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* @param {OpenSeadragon.Point} pixel
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* @returns {OpenSeadragon.Point}
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*/
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windowToImageCoordinates: function( pixel ) {
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var viewerCoordinates = pixel.minus(
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OpenSeadragon.getElementPosition( this.viewer.element ));
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return this.viewerElementToImageCoordinates( viewerCoordinates );
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},
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/**
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* Convert image coordinates to pixel coordinates relative to the window.
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* @param {OpenSeadragon.Point} pixel
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* @returns {OpenSeadragon.Point}
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*/
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imageToWindowCoordinates: function( pixel ) {
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var viewerCoordinates = this.imageToViewerElementCoordinates( pixel );
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return viewerCoordinates.plus(
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OpenSeadragon.getElementPosition( this.viewer.element ));
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},
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/**
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* Convert a viewport zoom to an image zoom.
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* Image zoom: ratio of the original image size to displayed image size.
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* 1 means original image size, 0.5 half size...
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* Viewport zoom: ratio of the displayed image's width to viewport's width.
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* 1 means identical width, 2 means image's width is twice the viewport's width...
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* @function
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* @param {Number} viewportZoom The viewport zoom
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* @returns {Number} imageZoom The image zoom
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*/
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viewportToImageZoom: function( viewportZoom ) {
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var ratio = this._scaleSpring.current.value *
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this.viewport._containerInnerSize.x / this.source.dimensions.x;
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return ratio * viewportZoom ;
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},
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/**
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* Convert an image zoom to a viewport zoom.
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* Image zoom: ratio of the original image size to displayed image size.
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* 1 means original image size, 0.5 half size...
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* Viewport zoom: ratio of the displayed image's width to viewport's width.
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* 1 means identical width, 2 means image's width is twice the viewport's width...
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* Note: not accurate with multi-image.
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* @function
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* @param {Number} imageZoom The image zoom
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* @returns {Number} viewportZoom The viewport zoom
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*/
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imageToViewportZoom: function( imageZoom ) {
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var ratio = this._scaleSpring.current.value *
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this.viewport._containerInnerSize.x / this.source.dimensions.x;
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return imageZoom / ratio;
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},
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/**
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* Sets the TiledImage's position in the world.
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* @param {OpenSeadragon.Point} position - The new position, in viewport coordinates.
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@ -1,21 +1,21 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>OpenSeadragon Basic Demo</title>
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<title>OpenSeadragon Coordinates Demo</title>
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<script type="text/javascript" src='../../build/openseadragon/openseadragon.js'></script>
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<script type="text/javascript" src='../lib/jquery-1.9.1.min.js'></script>
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<style type="text/css">
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.openseadragon1 {
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width: 800px;
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height: 600px;
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}
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.openseadragon1 {
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width: 800px;
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height: 600px;
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}
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</style>
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</head>
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<body>
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<div>
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Simple demo page to show a default OpenSeadragon viewer.
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Simple demo page to show OpenSeadragon coordinates system.
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</div>
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<div id="contentDiv" class="openseadragon1"></div>
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<div>
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@ -24,16 +24,26 @@
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<th></th>
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<th>Window (pixel)</th>
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<th>Container (pixel)</th>
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<th>Image (pixel)</th>
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<th>Image 1 - top left (pixel)</th>
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<th>Image 2 - bottom right (pixel)</th>
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<th>Viewport (point)</th>
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</tr>
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<tr>
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<th>Cursor position</th>
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<td id="windowPosition"></td>
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<td id="containerPosition"></td>
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<td id="imagePosition"></td>
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<td id="image1Position"></td>
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<td id="image2Position"></td>
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<td id="viewportPosition"></td>
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</tr>
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<tr>
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<th>Zoom</th>
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<td>-</td>
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<td>-</td>
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<td id="image1Zoom"></td>
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<td id="image2Zoom"></td>
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<td id="viewportZoom"></td>
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</tr>
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</table>
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</div>
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<script type="text/javascript">
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@ -42,36 +52,57 @@
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// debugMode: true,
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id: "contentDiv",
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prefixUrl: "../../build/openseadragon/images/",
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tileSources: "../data/testpattern.dzi",
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showNavigator:true
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tileSources: [{
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tileSource: "../data/testpattern.dzi"
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},
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{
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tileSource: "../data/testpattern.dzi",
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x: 1,
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y: 1,
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width: 0.5
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}
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],
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showNavigator: true
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});
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function pointToString(point) {
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return point.x.toPrecision(4) + "," + point.y.toPrecision(4);
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}
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var onMouseTrackerMove = function(event) {
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var onMouseTrackerMove = function (event) {
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var viewerX = event.position.x;
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var viewerY = event.position.y;
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var windowPoint = new OpenSeadragon.Point(viewerX, viewerY);
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$("#windowPosition").text( pointToString(windowPoint));
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$("#windowPosition").text(pointToString(windowPoint));
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var containerPoint = windowPoint.minus(
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OpenSeadragon.getElementPosition(viewer.element));
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$("#containerPosition").text( pointToString(containerPoint));
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var imagePoint = viewer.viewport.windowToImageCoordinates(windowPoint);
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$("#imagePosition").text( pointToString(imagePoint));
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$("#containerPosition").text(pointToString(containerPoint));
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var image1 = viewer.world.getItemAt(0);
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var imagePoint = image1.windowToImageCoordinates(windowPoint);
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$("#image1Position").text(pointToString(imagePoint));
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var image2 = viewer.world.getItemAt(1);
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var imagePoint = image2.windowToImageCoordinates(windowPoint);
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$("#image2Position").text(pointToString(imagePoint));
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var viewportPoint = viewer.viewport.windowToViewportCoordinates(windowPoint);
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$("#viewportPosition").text( pointToString(viewportPoint));
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$("#viewportPosition").text(pointToString(viewportPoint));
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};
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mouseTracker = new OpenSeadragon.MouseTracker({
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element: document,
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moveHandler: onMouseTrackerMove
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}).setTracking(true);
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function onAnimation() {
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var viewportZoom = viewer.viewport.getZoom(true);
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$("#viewportZoom").text(viewportZoom.toFixed(3));
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var image1 = viewer.world.getItemAt(0);
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var image1Zoom = image1.viewportToImageZoom(viewportZoom);
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$("#image1Zoom").text(image1Zoom.toFixed(3));
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var image2 = viewer.world.getItemAt(1);
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var image2Zoom = image2.viewportToImageZoom(viewportZoom);
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$("#image2Zoom").text(image2Zoom.toFixed(3));
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}
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viewer.addHandler("animation", onAnimation);
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</script>
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</body>
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</html>
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