keyboard support

main.go

@@ -49,7 +49,10 @@ func main() {
 	ui.MainWindow.SetWindowTitle(os.Args[1] + " - " + appName)
 
 	ui.infoArea.AddItem(fmt.Sprintf("Sorting %d entries", len(entries)))
+	ui.infoArea.AddItem("Use [Q] and [Z] to select with the keyboard")
+	ui.infoArea.ScrollToBottom()
 
+	active := true
 	ret := make(chan bool, 0)
 	ui.b1.OnClicked(func() { // Set up click handlers only once
 		ret <- true
@@ -58,8 +61,29 @@ func main() {
 		ret <- false
 	})
 
+	ui.MainWindow.OnKeyPressEvent(func(super func(event *qt.QKeyEvent), event *qt.QKeyEvent) {
+		if !active {
+			super(event)
+			return
+		}
+
+		keytext := strings.ToLower(event.Text())
+		if keytext == `q` {
+			ret <- true
+
+		} else if keytext == `z` {
+			ret <- false
+
+		} else { // not our event
+			super(event)
+		}
+
+	})
+
 	ui.MainWindow.Show()
 
+	ui.infoArea.SetFocusPolicy(qt.NoFocus) // prevent stealing keyboard input
+
 	comparisons := 0
 
 	go func() {
@@ -78,6 +102,7 @@ func main() {
 
 			return <-ret
 		})
+		active = false
 
 		mainthread.Start(func() {
 			ui.b1.SetEnabled(false)