How do you determine the initial reference when controlling a chart using visibleBounds?

Question

I used:var sel = app.documents[0].selection;
sel[j].visibleBounds = [sb[0], lcb, sb[2], rcb];to control two charts.I noticed that sometimes 00001 is placed at the front, and its height is used as the standard for changes. But sometimes 00002 is placed at the front, and its height is used as the reference.These are not based on which one was originally at the front, but seem to be based on the order of the filenames 00001 and 00002. Is this random? It doesn't seem so.How to ensure that the initial top-ranked item remains the standard reference and continues to rank first. That is, make it sb[0].

m1b · Accepted Answer

Hi @dublove the selection is an Array, which you can sort./*** Example of sorting frames by position on the page.** @author m1b* @version 2025-07-31* @discussion https://community.adobe.com/t5/indesign-discussions/how-do-you-determine-the-initial-reference-when-controlling-a-chart-using-visiblebounds/m-p/15437423*/(function () {    var doc = app.activeDocument;    // now we have an Array of selected page items    var frames = doc.selection;    // we have an array    alert('frames constructor name is "' + frames.constructor.name + '".');    if (0 === frames.length)        return alert('Please select some frames and try again.');    // sort the frame by left-right/top-bottom on the page    frames.sort(function (a, b) {        var aBounds = a.visibleBounds;        var bBounds = b.visibleBounds;        // compare the left edges        if (aBounds[1] < bBounds[1])            // a is left of b            return -1;        else if (aBounds[1] > bBounds[1])            // a is right of b            return 1;        else            // at the same horizontal position, so compare top edges            return aBounds[0] - bBounds[0];    });    // so now we know that frames[0] is above frames[1]    // just for demonstration!    frames[0].remove();})();

m1b · Answer

Hi @dublove I think you need to sort the array of graphics (or frames) based on their position on the page. Here is an example showing the Array.sort method at work:/*** Example of sorting graphics by position on the page.** @author m1b* @version 2025-07-31* @discussion https://community.adobe.com/t5/indesign-discussions/how-do-you-determine-the-initial-reference-when-controlling-a-chart-using-visiblebounds/m-p/15437423*/(function () {    var doc = app.activeDocument;    var graphics = [doc.allGraphics[0], doc.allGraphics[1]];    // sort the graphics by their frame's position on the page    graphics.sort(function (a, b) {        // we want the graphic's parent frame's bounds        var aBounds = a.parent.visibleBounds;        var bBounds = b.parent.visibleBounds;        // compare the left edges        if (aBounds[1] < bBounds[1])            // a is left of b            return -1;        else if (aBounds[1] > bBounds[1])            // a is right of b            return 1;        else            // at the same horizontal position, so compare top edges            return aBounds[0] - bBounds[0];    });    // so now we know that graphics[0] is to the left of graphics[1]        // just for demonstration!    graphics[0].remove();})(); After sorting, the graphics[0] will have the left-most frame.- Mark

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