File. Why not.

file.go

@@ -0,0 +1,129 @@
+package objects
+
+import "time"
+import "unicode"
+import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/tomo/data"
+import "git.tebibyte.media/tomo/tomo/input"
+import "git.tebibyte.media/tomo/tomo/event"
+import "git.tebibyte.media/tomo/objects/layouts"
+
+var _ tomo.Object = new(File)
+
+// File is a representation of a file or directory.
+type File struct {
+	box tomo.ContainerBox
+
+	label *Label
+	icon  *MimeIcon
+	mime  data.Mime
+
+	lastClick time.Time
+
+	on struct {
+		doubleClick event.FuncBroadcaster
+	}
+}
+
+// NewFile creates a new file icon with the given name and MIME type.
+func NewFile (name string, mime data.Mime) *File {
+	file := &File {
+		box:   tomo.NewContainerBox(),
+		label: NewLabel(""),
+		icon:  NewMimeIcon(mime, tomo.IconSizeLarge),
+	}
+	file.box.SetRole(tomo.R("objects", "File"))
+	file.box.SetAttr(tomo.ALayout(layouts.ContractVertical))
+	
+	file.box.Add(file.icon)
+	file.box.Add(file.label)
+	file.box.SetAttr(tomo.AAlign(tomo.AlignMiddle, tomo.AlignStart))
+	file.label.SetAlign(tomo.AlignMiddle, tomo.AlignStart)
+	// file.label.SetOverflow(false, true)
+	// file.label.SetWrap(true)
+	file.SetType(mime)
+	file.SetName(name)
+
+	file.box.SetInputMask(true)
+	file.box.SetFocusable(true)
+	file.box.OnButtonDown(file.handleButtonDown)
+	file.box.OnButtonUp(file.handleButtonUp)
+	file.box.OnKeyDown(file.handleKeyDown)
+	file.box.OnKeyUp(file.handleKeyUp)
+	return file
+}
+
+// GetBox returns the underlying box.
+func (this *File) GetBox () tomo.Box {
+	return this.box
+}
+
+// SetFocused sets whether or not this file has keyboard focus. If set to
+// true, this method will steal focus away from whichever object currently has
+// focus.
+func (this *File) SetFocused (focused bool) {
+	this.box.SetFocused(focused)
+}
+
+// SetName sets the text of the file's label.
+func (this *File) SetName (text string) {
+	this.label.SetText(truncateText(text, 16))
+}
+
+// SetType sets the MIME type of the file.
+func (this *File) SetType (mime data.Mime) {
+	this.mime = mime
+	this.icon.SetIcon(mime, tomo.IconSizeLarge)
+}
+
+// OnDoubleClick specifies a function to be called when the file is
+// double-clicked.
+func (this *File) OnDoubleClick (callback func ()) event.Cookie {
+	return this.on.doubleClick.Connect(callback)
+}
+
+func (this *File) handleKeyDown (key input.Key, numberPad bool) bool {
+	if key != input.KeyEnter && key != input.Key(' ') { return false }
+	return true
+}
+
+func (this *File) handleKeyUp (key input.Key, numberPad bool) bool {
+	if key != input.KeyEnter && key != input.Key(' ') { return false }
+	this.on.doubleClick.Broadcast()
+	return true
+}
+
+func (this *File) handleButtonDown (button input.Button) bool {
+	if button != input.ButtonLeft { return false }
+	return true
+}
+
+func (this *File) handleButtonUp (button input.Button) bool {
+	if button != input.ButtonLeft { return false }
+	if this.box.Window().MousePosition().In(this.box.Bounds()) {
+		// TODO double click delay should be configurable
+		if time.Since(this.lastClick) < time.Second {
+			this.on.doubleClick.Broadcast()
+		}
+		this.lastClick = time.Now()
+	}
+	return true
+}
+
+func truncateText (text string, max int) string {
+	lastChar := -1
+	len := 0
+	for index, char := range text {
+		if !unicode.IsSpace(char) {
+			lastChar = index
+		}
+		len ++
+		if len >= max {
+			if lastChar != -1 {
+				return text[:lastChar] + "..."
+			}
+			break
+		}
+	}
+	return text
+}