[icyspirit]

Summary

A crosshair in Point mode. It follows the mouse in the panel under it. A label beside it gives the values there, and dots mark where it meets the curves.

• Time traces: the header is t = 5 s, then one row per curve with its color, e.g. ■ Ip (equilibrium) [A] = 1.
• Profiles: the header is the coordinate, e.g. rho_tor_norm = 0.3, then one row per curve.
• Bars: the element (e.g. PF1), then its bars, one per source.
• Maps and time-space images: both coordinates, then the value of the image at that place.

Values:

• They are read along the lines of the curves, on log axes too.
• A curve that does not reach that x is left out.
• At most ten are listed, then "… N more".

The label:

• It keeps to the side of the cursor with more room, and stays within the plot.
• It is drawn over the legend and the title.
• It follows the view when the view changes (autoscale, shared x axes).
• Its values follow the time when the time is stepped with , . while the mouse rests on a profile.
• The crosshair goes away when the mouse leaves the plot, and in the Pan and Zoom modes.

Coordinates in the label and in the status bar:

• They are rounded to about a thousandth of the view, so 2.2e-16 shows as 0 (and a tiny negative coordinate as 0, not -0).
• On log axes they are the values, not their logarithms. The status bar used to show log10 of them.

Notes

• The lines and dots are in the coordinates of the view. The label is placed in pixels, like the title, so that it can be drawn over the legend.
• Its position is updated from the view box's sigTransformChanged. A guard skips the callback that the mapping itself can trigger.
• Clicking or dragging in a time trace still sets the time, as before.
• README: the Point mode bullet describes the crosshair.
• main (with Recent sources, and files dropped on the window #13) is merged in; the only conflict was the tests both branches added at the end of tests/test_gui.py, and both are kept.

Test plan

• QT_QPA_PLATFORM=offscreen pytest: 190 passed in the dev environment, a clean PySide6 6.11 environment and a PyQt5 5.15 environment, after merging main.
• New tests:
  • values and dots on time traces;
  • nothing beyond the data;
  • a profile whose values follow the time;
  • the value of a map and rounded coordinates;
  • the values of bars;
  • the label within the plot, over the legend, and beside the cursor after the view changes;
  • hidden when the mouse leaves the plot (also by a Leave event) and in Pan mode;
  • log axes: values, not logarithms, in the label and the status bar;
  • the rounding itself, including 0 rather than -0 (fails without the fix).
• Checked on screenshots of the demo: the label next to the legend of a trace, a profile, a time-space image, and a map corner.
• pyflakes src tests reports nothing.

🤖 Generated with Claude Code

https://claude.ai/code/session_018aVekYzCRLPE71Mm6UH8Zp