iris/ui/canvas_config.go

//go:build js && wasm

package ui

// CanvasDefaults contains default values for canvas rendering and interaction
type CanvasDefaults struct {
	// Interaction thresholds
	EdgeThreshold float64 // Distance from edge to trigger connection drawing (default: 15)
	DragThreshold float64 // Minimum movement to count as drag vs click (default: 2)

	// Resize constraints
	MinResizeWidth  float64 // Minimum width when resizing (default: 100)
	MinResizeHeight float64 // Minimum height when resizing (default: 100)

	// Resize handle sizes
	CornerHandleSize float64 // Size of corner resize handles (default: 12)
	EdgeHandleWidth  float64 // Width of edge resize handles (default: 8)
	EdgeHandleLength float64 // Length of edge resize handles (default: 24)

	// Connection rendering
	ConnectionHitWidth    float64 // Width of invisible hit area for connections (default: 12)
	LabelBackgroundWidth  float64 // Width of label background rect (default: 60)
	LabelBackgroundHeight float64 // Height of label background rect (default: 20)

	// Container layout
	ContainerHeaderHeight float64 // Height of container header bar for click detection (default: 32)
}

// DefaultCanvasDefaults returns the default configuration values
var DefaultCanvasDefaults = CanvasDefaults{
	// Interaction thresholds
	EdgeThreshold: 15.0,
	DragThreshold: 2.0,

	// Resize constraints
	MinResizeWidth:  100.0,
	MinResizeHeight: 100.0,

	// Resize handle sizes
	CornerHandleSize: 12.0,
	EdgeHandleWidth:  8.0,
	EdgeHandleLength: 24.0,

	// Connection rendering
	ConnectionHitWidth:    12.0,
	LabelBackgroundWidth:  60.0,
	LabelBackgroundHeight: 20.0,

	// Container layout
	ContainerHeaderHeight: 32.0,
}