Added double click delay to config

config.go

@@ -1,8 +1,14 @@
 package tomo
 
+import "time"
+
 // Config can return global configuration parameters.
 type Config interface {
 	// ScrollVelocity returns how many pixels should be scrolled every time
 	// a scroll button is pressed.
 	ScrollVelocity () int
+
+	// DoubleClickDelay returns the maximum delay between two clicks for
+	// them to be registered as a double click.
+	DoubleClickDelay () time.Duration
 }

default/config/config.go

@@ -1,5 +1,6 @@
 package config
 
+import "time"
 import "git.tebibyte.media/sashakoshka/tomo"
 
 // Default specifies default configuration values.
@@ -11,17 +12,28 @@ func (Default) ScrollVelocity () int {
 	return 16
 }
 
+// DoubleClickDelay returns the default double click delay.
+func (Default) DoubleClickDelay () time.Duration {
+	return time.Second / 2
+}
+
 // Wrapped wraps a configuration and uses Default if it is nil.
 type Wrapped struct {
 	tomo.Config
 }
 
-// ScrollVelocity returns how many pixels should be scrolled every time
-// a scroll button is pressed.
+// ScrollVelocity returns how many pixels should be scrolled every time a scroll
+// button is pressed.
 func (wrapped Wrapped) ScrollVelocity () int {
 	return wrapped.ensure().ScrollVelocity()
 }
 
+// DoubleClickDelay returns the maximum delay between two clicks for them to be
+// registered as a double click.
+func (wrapped Wrapped) DoubleClickDelay () time.Duration {
+	return wrapped.ensure().DoubleClickDelay()
+}
+
 func (wrapped Wrapped) ensure () (real tomo.Config) {
 	real = wrapped.Config
 	if real == nil { real = Default { } }

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()
 		}