mirror of
https://github.com/openseadragon/openseadragon.git
synced 2024-11-22 13:16:10 +03:00
fix Viewport._fixBounds to work with boundary constraints, and updated the demo page to show the behavior.
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Tom
parent
78c6295acf
commit
757bf8690e
@ -683,45 +683,55 @@ $.Viewport.prototype = {
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newBounds.y = center.y - newBounds.height / 2;
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var newZoom = 1.0 / newBounds.width;
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if (constraints) {
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var newBoundsAspectRatio = newBounds.getAspectRatio();
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var newConstrainedZoom = this._applyZoomConstraints(newZoom);
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if (newZoom !== newConstrainedZoom) {
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newZoom = newConstrainedZoom;
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newBounds.width = 1.0 / newZoom;
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newBounds.x = center.x - newBounds.width / 2;
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newBounds.height = newBounds.width / newBoundsAspectRatio;
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newBounds.y = center.y - newBounds.height / 2;
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}
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newBounds = this._applyBoundaryConstraints(newBounds);
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center = newBounds.getCenter();
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this._raiseConstraintsEvent(immediately);
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}
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if (immediately) {
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this.panTo(center, true);
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return this.zoomTo(newZoom, null, true);
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this.zoomTo(newZoom, null, true);
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if(constraints){
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this.applyConstraints(true);
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}
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return this;
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}
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this.panTo(this.getCenter(true), true);
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this.zoomTo(this.getZoom(true), null, true);
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var currentCenter = this.getCenter(true);
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var currentZoom = this.getZoom(true);
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this.panTo(currentCenter, true);
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this.zoomTo(currentZoom, null, true);
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var oldBounds = this.getBounds();
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var oldZoom = this.getZoom();
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if (oldZoom === 0 || Math.abs(newZoom / oldZoom - 1) < 0.00000001) {
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this.zoomTo(newZoom, true);
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return this.panTo(center, immediately);
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this.zoomTo(newZoom, null, true);
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this.panTo(center, immediately);
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if(constraints){
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this.applyConstraints(false);
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}
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return this;
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}
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newBounds = newBounds.rotate(-this.getRotation());
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var referencePoint = newBounds.getTopLeft().times(newZoom)
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var referencePoint;
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if(constraints){
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this.panTo(center, false);
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this.zoomTo(newZoom, null, false);
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var constrainedBounds = this.getConstrainedBounds();
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this.panTo(currentCenter, true);
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this.zoomTo(currentZoom, null, true);
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this.fitBounds(constrainedBounds);
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// this.zoomTo(newZoom, referencePoint, immediately);
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} else {
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var rotatedNewBounds = newBounds.rotate(-this.getRotation());
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referencePoint = rotatedNewBounds.getTopLeft().times(newZoom)
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.minus(oldBounds.getTopLeft().times(oldZoom))
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.divide(newZoom - oldZoom);
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return this.zoomTo(newZoom, referencePoint, immediately);
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this.zoomTo(newZoom, referencePoint, immediately);
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}
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return this;
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},
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/**
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@ -796,8 +806,9 @@ $.Viewport.prototype = {
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* Added to improve constrained panning
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* @param {Boolean} current - Pass true for the current location; defaults to false (target location).
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* @returns {OpenSeadragon.Rect} The bounds after applying constraints. The returned $.Rect contains additonal
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* properties xConstrained, yConstrained, constraintsApplied indicating the status
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* of the constraining operation; x and y are in the viewer element coordinate system.
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* properties constraintsApplied, xConstrained and yConstrained. These flags indicate
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* whether the viewport bounds were modified by the constraints of the viewer rectangle,
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* and in which dimension(s).
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*/
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getConstrainedBounds: function(current) {
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var bounds,
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@ -3,110 +3,159 @@
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<head>
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<title>OpenSeadragon fitBoundsWithConstraints() 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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height: 500px;
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border:thin black solid;
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margin-right:20px;
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}
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#highlights li {
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#controls li {
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cursor: pointer;
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}
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.layout{
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display:grid;
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grid-template-columns:auto 1fr;
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padding:10px;
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}
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.method{
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border:medium gray solid;
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margin:2px;
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background-color:rgb(240, 240, 240)
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}
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.method.selected{
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border:medium red solid;
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background-color: lightgoldenrodyellow;
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}
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</style>
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</head>
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<body>
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<div class="layout">
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<div id="contentDiv" class="openseadragon1"></div>
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<div id="controls">
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<div>
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Simple demo page to show 'viewport.fitBounds().applyConstraints()' issue.
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Simple demo page to show viewport.fitBounds() with and without constraints. The viewer
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is set up with visibilityRatio = 1 and constrainDuringPan = true to clearly demonstrate the
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constraints.
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</div>
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<div id="contentDiv" class="openseadragon1"></div>
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<div id="highlights"></div>
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<h3>Pick a method to use:</h3>
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<div>
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<div class="method selected" data-value="0">
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<pre>viewport.fitBounds(bounds); //Ignores constraints</pre>
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</div>
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<div class="method" data-value="1">
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<pre>viewport.fitBoundsWithConstraints(bounds);</pre>
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</div>
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<div class="method" data-value="4">
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<pre>viewport.fitBoundsWithConstraints(bounds, true); //immediate</pre>
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</div>
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<div class="method" data-value="2">
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<pre>//Initially ignore constraints
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viewport.fitBounds(bounds);
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//Apply constraints after 1 second delay
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setTimeout(() => viewport.applyConstraints(), 1000);</pre>
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</div>
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</div>
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<button id="rotate">Rotate the viewer</button>
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<h3>Click to fit overlay bounds:</h3>
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<ul></ul>
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<h4>overlay.getBounds(viewer.viewport):</h4>
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<pre class="bounds">Pick an overlay above to show the bounds</pre>
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</div>
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</div>
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<select onchange="changeMethod(this.value);">
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<option value=0>viewport.fitBoundsWithConstraints(bounds);</option>
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<option value=1>viewport.fitBounds(bounds);</option>
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<option value=2>viewport.fitBounds(bounds).applyConstraints();</option>
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</select>
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<input type="button" value="Go home" onclick="goHome()"/>
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<script type="text/javascript">
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var _viewer;
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var viewer;
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var _fittingMethod = 0;
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var _highlights = [
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{"queryPoint":[0.13789887359998443,0.43710575899579285], "radius":0.004479581945070337,"text":"Pipe"},
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{"queryPoint":[0.5923298766583593,0.6461653354541856], "radius":0.013175241014912752,"text":"Fuel here"},
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{"queryPoint":[0.43920338711232304,0.7483181389302148], "radius":0.09222668710438928, "text":"Wheel"},
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{"queryPoint":[0.07341677959486298,0.9028719921872319], "radius":0.08996845561083797, "text":"Nothing special"}
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];
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var generateUniqueHash = (function() {
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var counter = 0;
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return function() {
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return "openseadragon_" + (counter++);
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};
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})();
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var _viewer = OpenSeadragon({
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element: document.getElementById("contentDiv"),
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showNavigationControl: false,
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viewer = window.viewer = OpenSeadragon({
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id: "contentDiv",
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prefixUrl: "../../build/openseadragon/images/",
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hash: generateUniqueHash(), //this is only needed if you want to instantiate more than one viewer at a time.
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tileSources: {
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Image: {
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xmlns: "http://schemas.microsoft.com/deepzoom/2008",
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Url: 'http://cdn.photosynth.net/ps2/19d5cf2b-77ed-439f-ac21-d3046320384c/packet/undistorted/img0043/',
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Format: "jpg",
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Overlap: 1,
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TileSize: 510,
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Size: {
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Width: 4592,
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Height: 3448
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}
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}
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}
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});
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_viewer.addHandler("open", function() {
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var str = "<ul>";
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for (var i=0; i<_highlights.length; ++i) {
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var highlight = _highlights[i];
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str += "<li onclick='gotoHighlight("+i+")'>"+highlight.text+"</li>";
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}
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str += "</ul>";
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document.getElementById("highlights").innerHTML = str;
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tileSources: "../data/testpattern.dzi",
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minZoomImageRatio: 0,
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maxZoomPixelRatio: 10,
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visibilityRatio:1.0,
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constrainDuringPan:true,
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});
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function gotoHighlight(index) {
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var highlight = _highlights[index];
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viewer.addHandler("open", function(event) {
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var elt = document.createElement("div");
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elt.className = "runtime-overlay";
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elt.style.background = "green";
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elt.style.outline = "3px solid red";
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elt.style.opacity = "0.7";
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elt.textContent = "Within the image";
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viewer.addOverlay({
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element: elt,
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location: new OpenSeadragon.Rect(0.21, 0.21, 0.099, 0.299),
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rotationMode: OpenSeadragon.OverlayRotationMode.BOUNDING_BOX
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});
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var viewport = _viewer.viewport;
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var contentSize = viewport.contentSize;
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var scaling = 1.0 / viewport.viewportToImageZoom(viewport.getZoom());
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var radius = highlight.radius*Math.min(contentSize.x, contentSize.y);/*annotation.accurateRadius*scaling;*/
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var center = new OpenSeadragon.Point(contentSize.x*highlight.queryPoint[0], contentSize.y*highlight.queryPoint[1]);
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var bounds = viewport.imageToViewportRectangle(new OpenSeadragon.Rect(center.x-radius, center.y-radius, radius*2, radius*2));
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elt = document.createElement("div");
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elt.className = "runtime-overlay";
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elt.style.background = "white";
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elt.style.opacity = "0.5";
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elt.style.outline = "5px solid pink";
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elt.textContent = "Left edge rectangle";
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viewer.addOverlay({
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element: elt,
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location: new OpenSeadragon.Rect(-0.4, 0.7, 0.7, 0.15)
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});
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var elt = document.createElement("div");
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elt.className = "runtime-overlay";
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elt.style.background = "lightblue";
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elt.style.outline = "3px solid purple";
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elt.style.opacity = "0.7";
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elt.textContent = "Top right square";
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viewer.addOverlay({
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element: elt,
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location: new OpenSeadragon.Rect(0.9, -0.1, 0.2, 0.2),
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rotationMode: OpenSeadragon.OverlayRotationMode.BOUNDING_BOX
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});
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viewer.currentOverlays.forEach(overlay=>{
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var text = $(overlay.element).text();
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$('<li>').text(text).appendTo('#controls ul').on('click',()=>{
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var bounds = overlay.getBounds(viewer.viewport);
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$('.bounds').text(JSON.stringify(bounds,null,2));
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var _fittingMethod = parseInt($('.method.selected').data('value'));
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if (_fittingMethod === 0) {
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viewport.fitBoundsWithConstraints(bounds, false);
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viewer.viewport.fitBounds(bounds, false);
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}
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else if (_fittingMethod === 1) {
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viewport.fitBounds(bounds, false);
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viewer.viewport.fitBoundsWithConstraints(bounds, false);
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}
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else if (_fittingMethod === 4) {
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viewer.viewport.fitBoundsWithConstraints(bounds, true);
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}
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else if (_fittingMethod === 2) {
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viewport.fitBounds(bounds, false).applyConstraints();
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}
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viewer.viewport.fitBounds(bounds, false);
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setTimeout(()=>viewer.viewport.applyConstraints(), 1000);
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}
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});
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})
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function changeMethod(value) {
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_fittingMethod = parseInt(value, 10);
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}
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viewer.viewport.zoomTo(0.5, null, true);
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function goHome() {
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_viewer.viewport.goHome();
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}
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});
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$('.method').on('click',function(){
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$('.method').removeClass('selected');
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$(this).addClass('selected');
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})
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$("#rotate").click(function() {
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viewer.viewport.setRotation(viewer.viewport.getRotation() - 22.5);
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$("#degrees").text(viewer.viewport.getRotation() + "deg");
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});
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</script>
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</body>
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