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Merge pull request #2049 from superbland/get_relative_image_size

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Add method for getting the relative size of an image
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Ian Gilman 2021-11-05 11:50:50 -07:00 committed by GitHub
commit f0d5d4bedd
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2 changed files with 24 additions and 1 deletions
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9
src/tiledimage.js
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@ -419,6 +419,15 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
return new $.Point(this.source.dimensions.x, this.source.dimensions.y);
},
/**
* @returns {OpenSeadragon.Point} The TiledImage's content size, in window coordinates.
*/
getSizeInWindowCoordinates: function() {
var topLeft = this.imageToWindowCoordinates(new $.Point(0, 0));
var bottomRight = this.imageToWindowCoordinates(this.getContentSize());
return new $.Point(bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);
},
// private
_viewportToImageDelta: function( viewerX, viewerY, current ) {
var scale = (current ? this._scaleSpring.current.value : this._scaleSpring.target.value);

16
test/modules/tiledimage.js
View File

@ -41,8 +41,11 @@
viewer.addHandler('open', function(event) {
var image = viewer.world.getItemAt(0);
var contentSize = image.getContentSize();
var sizeInWindowCoords = image.getSizeInWindowCoordinates();
assert.equal(contentSize.x, 500, 'contentSize.x');
assert.equal(contentSize.y, 2000, 'contentSize.y');
assert.equal(sizeInWindowCoords.x, 125, 'sizeInWindowCoords.x');
assert.equal(sizeInWindowCoords.y, 500, 'sizeInWindowCoords.y');
checkBounds(assert, image, new OpenSeadragon.Rect(5, 6, 10, 40), 'initial bounds');
@ -74,7 +77,18 @@
image.setHeight(4);
checkBounds(assert, image, new OpenSeadragon.Rect(7, 8, 1, 4), 'bounds after width');
assert.equal(handlerCount, 1, 'correct number of handlers called');
viewer.addHandler('zoom', function zoomHandler(event) {
var sizeInWindowCoords = image.getSizeInWindowCoordinates();
viewer.removeHandler('zoom', zoomHandler);
handlerCount++;
assert.equal(sizeInWindowCoords.x, 4000, 'sizeInWindowCoords.x after zoom');
assert.equal(sizeInWindowCoords.y, 16000, 'sizeInWindowCoords.y after zoom');
});
viewer.viewport.zoomTo(8, null, true);
assert.equal(handlerCount, 2, 'correct number of handlers called');
done();
});