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Merge pull request #666 from fs-webdev/master

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Added code to handle the case where autoResize=true. In this mode th…
This commit is contained in:
Ian Gilman 2015-06-29 14:14:19 -07:00
commit 769221f659
2 changed files with 27 additions and 5 deletions
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4
src/openseadragon.js
View File

@ -252,6 +252,9 @@
* @property {Boolean} [autoResize=true]
* Set to false to prevent polling for viewer size changes. Useful for providing custom resize behavior.
*
* @property {Boolean} [preserveImageSizeOnResize=false]
* Set to true to have the image size preserved when the viewer is resized. This requires autoResize=true (default).
*
* @property {Number} [pixelsPerWheelLine=40]
* For pixel-resolution scrolling devices, the number of pixels equal to one scroll line.
*
@ -987,6 +990,7 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
maxZoomPixelRatio: 1.1, //-> higher allows 'over zoom' into pixels
pixelsPerWheelLine: 40,
autoResize: true,
preserveImageSizeOnResize: false, // requires autoResize=true
//DEFAULT CONTROL SETTINGS
showSequenceControl: true, //SEQUENCE

28
src/viewer.js
View File

@ -2824,13 +2824,31 @@ function updateOnce( viewer ) {
return;
}
var containerSize;
if ( viewer.autoResize ) {
var containerSize = _getSafeElemSize( viewer.container );
containerSize = _getSafeElemSize( viewer.container );
if ( !containerSize.equals( THIS[ viewer.hash ].prevContainerSize ) ) {
// maintain image position
var oldBounds = viewer.viewport.getBounds();
var oldCenter = viewer.viewport.getCenter();
resizeViewportAndRecenter(viewer, containerSize, oldBounds, oldCenter);
if ( viewer.preserveImageSizeOnResize ) {
var prevContainerSize = THIS[ viewer.hash ].prevContainerSize;
var bounds = viewer.viewport.getBounds(true);
var deltaX = (containerSize.x - prevContainerSize.x);
var deltaY = (containerSize.y - prevContainerSize.y);
var viewportDiff = viewer.viewport.deltaPointsFromPixels(new OpenSeadragon.Point(deltaX, deltaY), true);
viewer.viewport.resize(new OpenSeadragon.Point(containerSize.x, containerSize.y), false);
// Keep the center of the image in the center and just adjust the amount of image shown
bounds.width += viewportDiff.x;
bounds.height += viewportDiff.y;
bounds.x -= (viewportDiff.x / 2);
bounds.y -= (viewportDiff.y / 2);
viewer.viewport.fitBoundsWithConstraints(bounds, true);
}
else {
// maintain image position
var oldBounds = viewer.viewport.getBounds();
var oldCenter = viewer.viewport.getCenter();
resizeViewportAndRecenter(viewer, containerSize, oldBounds, oldCenter);
}
THIS[ viewer.hash ].prevContainerSize = containerSize;
THIS[ viewer.hash ].forceRedraw = true;
}