render

type Appearance ¶

type Appearance interface {
	DrawNode(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, n Node)
	DrawPad(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, p Pad)
	DrawEdge(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, e Edge)
}

Appearance represents an implementation which can display a flowchart.

type BasicRenderer ¶

type BasicRenderer struct{}

func (renderer *BasicRenderer) DrawEdge(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, e Edge)

func (r *BasicRenderer) DrawNode(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, n Node)

func (renderer *BasicRenderer) DrawPad(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, p Pad)

type ColoredPad ¶

type ColoredPad interface {
	PadColor() (float64, float64, float64)
}

ColoredPad describes a pad with a custom color.

type DecoratedNode ¶

type DecoratedNode interface {
	NodeDecorator() NodeDecorator
}

DecoratedNode describes nodes which provide decoration information.

type DrawFunc ¶ added in v0.4.0

type DrawFunc func(da *gtk.DrawingArea, cr *cairo.Context, animStep int64, x, y float64)

type Edge ¶

type Edge interface {
	FromPos() (float64, float64)
	ToPos() (float64, float64)
	Edge() flow.Edge
}

type FocusableElement ¶

type FocusableElement interface {
	Active() bool
}

FocusableElement types are elements which can be focused, and are drawn with a thicker outline if they are currently focused.

type HeadlineElement ¶

type HeadlineElement interface {
	NodeHeadline() string
}

HeadlineElement describes nodes which have text labels which should be rendered.

type Node ¶

type Node interface {
	Pos() (float64, float64)
	Node() flow.Node
}

type NodeDecorator ¶ added in v0.4.0

type NodeDecorator interface {
	NodeIcon() *gdk.Pixbuf
	NodeColor() (float64, float64, float64)
	NodeOverlayDraw() DrawFunc
}

NodeDecorator describes types which provide information about how to draw nodes.

type Pad ¶

type Pad interface {
	Pos() (float64, float64)
	Pad() flow.Pad
}