Added double click delay to config

elements/file/directory.go

@@ -238,6 +238,10 @@ func (element *Directory) partition () {
 	}
 }
 
+func (element *Directory) Window () tomo.Window {
+	return element.core.Window()
+}
+
 // NotifyMinimumSizeChange notifies the container that the minimum size of a
 // child element has changed.
 func (element *Directory) NotifyMinimumSizeChange (child tomo.Element) {

elements/file/file.go

@@ -132,7 +132,7 @@ func (element *File) HandleMouseUp (x, y int, button input.Button) {
 	element.pressed = false
 	within := image.Point { x, y }.
 		In(element.Bounds())
-	if time.Since(element.lastClick) < time.Second / 2 {
+	if time.Since(element.lastClick) < element.config.DoubleClickDelay() {
 		if element.Enabled() && within && element.onChoose != nil {
 			element.onChoose()
 		}