FunctionUi

Construct the base function.

Actual state of the inner colour as determined by the SetupDrawing method.

Actual state of the outer colour as determined by the SetupDrawing method.

Gets all the arguments associated with this function. Arguments can be either of type Vector (i.e. 2D grips) or Scalar (i.e. 1D sliders) or referents (i.e. 1D functions).

Override this property and return false if the underlying function is expected to contain discontinuities.

The function hosted by the UI.

Gets or sets whether the grips (and scalars) of this function ought to be drawn.

Gets the icon associated with this function.

Gets the identifier of this UI instance.

The polyline segments the graph was most recently drawn with, in graph (content) coordinates. Empty when the function hasn't been drawn yet. Populated by DrawGraph(FunctionGraphics) from whatever GraphSegments(FunctionGraphics) yields, so subclasses that override GraphSegments (LinearFunction, ThresholdFunction, etc.) contribute here too. Hit-testing uses these so the click tolerance matches the rendered pixels exactly.

Gets the description of this function.

Gets or sets the stature of this function. The stature controls the visual style of the function, as well as its inclusion in any outputted collection.

Gets or sets the selected state.

Gets or sets the Open-Color family used to tint this function. A concrete shade is resolved at draw time based on the current background so the function stays legible under any theme. Use TintFor(Color) when a concrete Color is needed.

Gets or sets the user name assigned to this function.

Override this property if your function has a variable number of vector arguments.

Draw any decoration that should appear on top of the graph polyline. Called from DrawGraph(FunctionGraphics) after the polyline has been rendered.

Draw any decoration that should appear behind the graph polyline. Called from DrawGraph(FunctionGraphics) after GraphSegments(FunctionGraphics) has run, so LatestGraphSegments is populated and available.

Test whether a grip can be inserted at or near a coordinate.

Override this method to specifically okay removal off a specific grip.

Draw this function graph into a graphics context. Non-virtual: subclasses customise the rendering via GraphSegments(FunctionGraphics) (the polyline itself) and the BeforeDrawGraphSegments(FunctionGraphics) / AfterDrawGraphSegments(FunctionGraphics) hooks (any decorations before or after the curve). This keeps pen setup, rank thickness rules, obscure dashing, and segment capture in one place.

Draw all grip flourishes associated with this function.

Draw all grips associated with this function.

Draw the visual hints such as asymptotes, limits and markers associated with this function.

Draw all scalars associated with this function.

Compute an estimate of the distance from the function to the given point. This estimate is done by sampling the function at small intervals around the point. Note: implementors may choose to override this method and provide analytic distance measurements.

Compute an estimate of the point on the function closest to a search point. This estimate is done by sampling the function at small intervals around the point.

Override this method if you think you can provide a more performant way to generate a graphics path representing the graph curve.

Raise the FunctionChanged event.

Invoked when the context menu for this function is about to be shown.

Must be called prior to any draw method. This will ensure the colours and layout are correct.

Resolve Tint into a concrete colour that stands out against the supplied background.

Try and insert a grip at a coordinate.

Try and remove a set of grips.

Raised when the shape of the function changes due to non-grip/scalar events, for example when the function is modified via a custom menu item.