**QPlotMarker** – an interactive marker for **QChart** (Qt). Supports color and orientation (vertical/horizontal) changes, snaps to data points, and displays intersection coordinates.

chart cpp cpp17 data-plotting data-visualization interactive-graphs markers plotting qplotmarker qt qt5 qt5-chart qt6 qt6-app qtcharts realtime-plotting scientific-plotting svg
1 Open Issue Need Help Last updated: Jun 30, 2025

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AI Summary: The task is to improve the QPlotMarker library by adding the ability to customize the background color of the coordinate display. Currently, the background color is automatically determined by the application's palette, leading to poor visibility in situations where the application's theme clashes with the operating system's theme (e.g., dark text on a dark background). The solution involves modifying the `GraphicsCoordItem::paint` function to allow setting a custom background color for the coordinate display, potentially using a separate setting or by intelligently adapting to the system theme.

Complexity: 2/5
help wanted

**QPlotMarker** – an interactive marker for **QChart** (Qt). Supports color and orientation (vertical/horizontal) changes, snaps to data points, and displays intersection coordinates.

C++
#chart#cpp#cpp17#data-plotting#data-visualization#interactive-graphs#markers#plotting#qplotmarker#qt#qt5#qt5-chart#qt6#qt6-app#qtcharts#realtime-plotting#scientific-plotting#svg