objects/mimeicon.go

package objects

import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/data"
import "git.tebibyte.media/tomo/tomo/canvas"

var _ tomo.Object = new(MimeIcon)

// MimeIcon displays an icon of a MIME type.
type MimeIcon struct {
	box  tomo.Box
	mime data.Mime
	size tomo.IconSize
}

// NewMimeIcon creates a new icon from a MIME type.
func NewMimeIcon (mime data.Mime, size tomo.IconSize) *MimeIcon {
	mimeIcon := &MimeIcon {
		box: tomo.NewBox(),
	}
	mimeIcon.box.SetRole(tomo.R("objects", "MimeIcon"))
	mimeIcon.SetIcon(mime, size)
	mimeIcon.box.OnIconSetChange(mimeIcon.handleIconSetChange)
	return mimeIcon
}

// GetBox returns the underlying box.
func (this *MimeIcon) GetBox () tomo.Box {
	return this.box
}

// SetIcon sets the MIME type and size of the icon.
func (this *MimeIcon) SetIcon (mime data.Mime, size tomo.IconSize) {
	if this.mime == mime && this.size == size { return }
	this.mime = mime
	this.size = size
	this.setTexture(tomo.MimeIconTexture(mime, size))
}

func (this *MimeIcon) handleIconSetChange () {
	this.setTexture(tomo.MimeIconTexture(this.mime, this.size))
}

func (this *MimeIcon) setTexture (texture canvas.Texture) {
	this.box.SetAttr(tomo.ATexture(texture))
	this.box.SetAttr(tomo.ATextureMode(tomo.TextureModeCenter))
	if texture == nil {
		this.box.SetAttr(tomo.AMinimumSize(0, 0))
	} else {
		bounds := texture.Bounds()
		this.box.SetAttr(tomo.AttrMinimumSize(bounds.Max.Sub(bounds.Min)))
	}
}