Class ShapeVisualManager

Namespace

FlowGraph.Avalonia.Rendering.ShapeRenderers

Assembly

FlowGraph.Avalonia.dll

Manages the visual representation of shape elements on the canvas.

public class ShapeVisualManager

Inheritance

object

ShapeVisualManager

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

ShapeVisualManager follows the same pattern as NodeVisualManager and EdgeVisualManager, providing consistent management of visual-to-model mappings for shape elements.

It handles: - Creating visuals for shape elements - Positioning visuals in canvas coordinates - Updating visuals when properties change - Removing visuals when shapes are removed

Constructors

ShapeVisualManager(Canvas)

Creates a new ShapeVisualManager for the specified canvas.

public ShapeVisualManager(Canvas canvas)

Parameters

canvas Canvas

The canvas to manage shape visuals on.

Methods

AddOrUpdateShape(ShapeElement)

Adds or updates a shape visual on the canvas.

public void AddOrUpdateShape(ShapeElement shape)

Parameters

shape ShapeElement

The shape element to render.

Clear()

Removes all shape visuals from the canvas.

public void Clear()

GetShapeIds()

Gets all tracked shape IDs.

public IEnumerable<string> GetShapeIds()

Returns

IEnumerable<string>

GetVisual(string)

Gets the visual for a shape by ID.

public Control? GetVisual(string shapeId)

Parameters

shapeId string

The shape ID.

Returns

Control

The visual control, or null if not found.

RefreshAll()

Updates all shape visuals (e.g., after zoom change).

public void RefreshAll()

RemoveShape(string)

Removes a shape visual from the canvas.

public void RemoveShape(string shapeId)

Parameters

shapeId string

The ID of the shape to remove.

SetRenderContext(RenderContext)

Sets the render context for coordinate transformations and settings.

public void SetRenderContext(RenderContext context)

Parameters

context RenderContext

The render context to use.

SetTheme(ThemeResources)

Sets the theme for rendering resize handles.

public void SetTheme(ThemeResources theme)

Parameters

theme ThemeResources

UpdateResizeHandlePositions()

Updates the resize handle positions for all tracked shapes. Call this during shape dragging to keep resize handles in sync with shape positions.

public void UpdateResizeHandlePositions()

UpdateSelection(string, bool)

Updates the selection state of a shape visual.

public void UpdateSelection(string shapeId, bool isSelected)

Parameters

shapeId string

The ID of the shape to update.

isSelected bool

Whether the shape is selected.