techy2 commented on issue #20825:
URL: https://github.com/apache/echarts/issues/20825#issuecomment-2723118150
I didn't expect the form to try and HTML format the diff, sigh.... here it
is without the attempted formatting
<pre>
--- ../echarts.js.orig Thu Mar 13 18:33:05 2025
+++ echarts.js Thu Mar 13 18:36:09 2025
@@ -71820,7 +71820,8 @@
*/
function retrieveRawOption(option) {
var ret = {};
- each(['start', 'end', 'startValue', 'endValue', 'throttle'], function
(name) {
+// MODIFIED, get anchor value for pinning chart to left or right end during
dataZoom
+ each(['start', 'end', 'startValue', 'endValue', 'throttle',
'anchor'], function (name) {
option.hasOwnProperty(name) && (ret[name] = option[name]);
});
return ret;
@@ -80120,8 +80121,14 @@
var directionInfo = getDirectionInfo[coordSysMainType](null,
[e.originX, e.originY], axisModel, controller, coordSysInfo);
var percentPoint = (directionInfo.signal > 0 ?
directionInfo.pixelStart + directionInfo.pixelLength - directionInfo.pixel :
directionInfo.pixel - directionInfo.pixelStart) / directionInfo.pixelLength *
(range[1] - range[0]) + range[0];
var scale = Math.max(1 / e.scale, 0);
- range[0] = (range[0] - percentPoint) * scale + percentPoint;
- range[1] = (range[1] - percentPoint) * scale + percentPoint;
+// MODIFIED, logic to conditionally pin the plot to the left or right side
of the viewBox
+ var anchor = this.__model?.option?.anchor || null;
+ if (anchor !== 'start') { // pin zoom to left side of the X axis
viewBox
+ range[0] = (range[0] - percentPoint) * scale + percentPoint;
+ }
+ if (anchor !== 'end') { // pin zoom to the right side of the X axis
viewBox
+ range[1] = (range[1] - percentPoint) * scale + percentPoint;
+ }
// Restrict range.
var minMaxSpan =
this.dataZoomModel.findRepresentativeAxisProxy().getMinMaxSpan();
sliderMove(0, range, [0, 100], 0, minMaxSpan.minSpan,
minMaxSpan.maxSpan);
</pre>
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