objects/labelswatch.go

package objects

import "image/color"
import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/input"
import "git.tebibyte.media/tomo/tomo/event"
import "git.tebibyte.media/tomo/objects/layouts"

// LabelSwatch is a swatch with a label.
type LabelSwatch struct {
	tomo.ContainerBox
	swatch  *Swatch
	label   *Label
}

// NewLabelSwatch creates a new labeled swatch with the specified color and
// label text.
func NewLabelSwatch (value color.Color, text string) *LabelSwatch {
	box := &LabelSwatch {
		ContainerBox: tomo.NewContainerBox(),
		swatch:       NewSwatch(value),
		label:        NewLabel(text),
	}
	box.SetRole(tomo.R("objects", "LabelSwatch", ""))
	box.swatch.label = text
	box.label.SetAlign(tomo.AlignStart, tomo.AlignMiddle)
	box.Add(box.swatch)
	box.Add(box.label)
	box.SetLayout(layouts.Row { false, true })

	box.OnMouseUp(box.handleMouseUp)
	box.label.OnMouseUp(box.handleMouseUp)
	return box
}

// SetValue sets the color of the swatch.
func (this *LabelSwatch) SetValue (value color.Color) {
	this.swatch.SetValue(value)
}

// Value returns the color of the swatch.
func (this *LabelSwatch) Value () color.Color {
	return this.swatch.Value()
}

// RGBA satisfies the color.Color interface
func (this *LabelSwatch) RGBA () (r, g, b, a uint32) {
	return this.swatch.RGBA()
}

// OnValueChange specifies a function to be called when the swatch's color
// changes.
func (this *LabelSwatch) OnValueChange (callback func ()) event.Cookie {
	return this.swatch.OnValueChange(callback)
}

func (this *LabelSwatch) handleMouseUp (button input.Button) {
	if button != input.ButtonLeft { return }
	if this.MousePosition().In(this.Bounds()) {
		this.swatch.SetFocused(true)
		this.swatch.Choose()
	}
}