arrowhead

Documentation

Overview

Package arrowhead implements an arrowhead canvas object.

Index

• type Arrowhead
  • func MakeArrowhead(base, tip fyne.Position) *Arrowhead
  • func (a *Arrowhead) Hide()
  • func (a *Arrowhead) LeftPoint() fyne.Position
  • func (a *Arrowhead) MinSize() fyne.Size
  • func (a *Arrowhead) Move(p fyne.Position)
  • func (a *Arrowhead) Objects() []fyne.CanvasObject
  • func (a *Arrowhead) Position() fyne.Position
  • func (a *Arrowhead) Refresh()
  • func (a *Arrowhead) Resize(s fyne.Size)
  • func (a *Arrowhead) RightPoint() fyne.Position
  • func (a *Arrowhead) Show()
  • func (a *Arrowhead) Size() fyne.Size
  • func (a *Arrowhead) Visible() bool

Types

type Arrowhead

type Arrowhead struct {
	// Base is used to define the "base" of the arrow, which thus defines
	// the direction which the arrow faces.
	Base fyne.Position

	// Tip is the point at which the tip of the arrow will be placed.
	Tip fyne.Position

	// StrokeWidth is the width of the arrowhead lines
	StrokeWidth float32

	// StrokeColor is the color of the arrowhead
	StrokeColor color.Color

	// Theta is the angle between the two "tails" that intersect at the
	// tip.
	Theta float32

	// Length is the length of the two "tails" that intersect at the tip.
	Length int
	// contains filtered or unexported fields
}

Arrowhead defines a canvas object which renders an arrow pointing in a particular direction.

        Left
          \
           \  Length
      Theta \
Base ------- + Tip
            /
           /
          /
        Right

func MakeArrowhead

func MakeArrowhead(base, tip fyne.Position) *Arrowhead

func (*Arrowhead) Hide

func (a *Arrowhead) Hide()

func (*Arrowhead) LeftPoint

func (a *Arrowhead) LeftPoint() fyne.Position

func (*Arrowhead) MinSize

func (a *Arrowhead) MinSize() fyne.Size

func (*Arrowhead) Move

func (a *Arrowhead) Move(p fyne.Position)

func (*Arrowhead) Objects

func (a *Arrowhead) Objects() []fyne.CanvasObject

temporary hack, don't do this

func (*Arrowhead) Position

func (a *Arrowhead) Position() fyne.Position

func (*Arrowhead) Refresh

func (a *Arrowhead) Refresh()

func (*Arrowhead) Resize

func (a *Arrowhead) Resize(s fyne.Size)

func (*Arrowhead) RightPoint

func (a *Arrowhead) RightPoint() fyne.Position

func (*Arrowhead) Show

func (a *Arrowhead) Show()

func (*Arrowhead) Size

func (a *Arrowhead) Size() fyne.Size

func (*Arrowhead) Visible

func (a *Arrowhead) Visible() bool