Glossary of Terms #
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Widget: Widgets are the individual components for creating user interfaces in FreeCAD. Widgets can display data and status information, receive user input, and provide a container for other widgets that should be grouped together. FreeCAD uses the QtWidget toolkit.
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Element: A primary component of the FreeCAD User Interface consisting of a combination of widgets to support navigation and feature execution providing a means for user interaction.
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Panel: A window element which can be docked to the edge of the screen in a static position.
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Main View / 3D View: This is the main view area of the users screen where work is displayed and these two terms are largely interchangeable within FreeCAD.
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Contrast: Difference between colors. For accessibility, contrast refers strictly to the difference in tone. A difference of 40 in tone guarantees a WCAG contrast ratio ≥ 3.0; a difference of 50 in tone guarantees a contrast ratio ≥ 4.5. FreeCAD makes extensive use of colors and high contrast ratios should be a developers goal.
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Design guidelines: Guidelines are descriptive written and illustrated docs that demonstrate usage and behavior mainly through examples. They’re the long-form discussion of specs that help designers and developers with problem-solving and decision-making.