Store canvas as html#22691
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Jun 24, 2026
TWebCanvas can create JSON for any canvas. Now let store such JSON in HTML file which also includes minimal JavaScript code to display such object. Supported also store of several canvases into single HTML file - using TCanvas::SaveAll() method.
In such case TWebCanvas methods invoked via interpreter
Use flex layout and shadows like in pure JSROOT
Like for all other images users can see which files are actually created and size of created files.
Test storage of single canvas and several canvases using TCanvas::SaveAll() method webgui component is required to run such tests
Add item in Save menu and add *.html to list of supported file types in SaveAs dialog
Add correspondent entries to "Save" and "Save as" menu commands.
1. Let store canvas as html file via context menu 1. Improve `TGraph` update 1. When draw TH2/TF2 with "surf same" draw option, only lines are drawn 1. Fix - prevent very long header in context menu 1. Fix - draw 3d contours in "surf3" twice https://root-forum.cern.ch/t/64910
After JSROOT update SURF3 produce more output for contour plot
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Test Results 22 files 22 suites 3d 16h 5m 12s ⏱️ Results for commit b6fb713. |
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Now canvas (or several canvases) can be stored in portable HTML file.
Just call
c1->SaveAs("canvas.html")or invoke correspondent menu item.To store several canvases in single HTML file one can use:
Produced HTML file will include canvas JSON data and JavaScript code to load and display canvas.
Such file can be loaded locally in any web browser or send as attachment in email to colleagues.
Also plain JSROOT now support such feature.
Add several tests to verify that HTML and JSON files are produced and have expected size.
Add release notes
Example of such stored file:
canvas.html
all.html