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Playing with coroutines and QML

** aka Playing with coroutines and Qt (Part II)

From 5747a7530206ac410b6bd7c1b8490d7d389ad3a5 JavaScript Generators are supported in QML. This enables to write the Fibonacci example from the previous post using generators and QML.

Mandatory example:

import QtQuick 2.11
import QtQuick.Window 2.11
import QtQuick.Controls 2.2

Window { property var fibonacci: function* () { yield "0: 0" yield "1: 1" var f0 = 1, f1 = 0, n = 2; while (true) { var next = f1 + f0; f0 = f1; f1 = next; yield n++ + ": " + (f0 + f1); } }

visible: true width: 640 height: 480 title: qsTr("Fibonacci")

Row { anchors.fill: parent Button { id: button property var coroutine: fibonacci() width: parent.width / 2; height: parent.height text: coroutine.next().value onPressed: text = coroutine.next().value }

Button { text: "Reset!" width: parent.width / 2; height: parent.height onPressed: { button.coroutine = fibonacci() button.text = button.coroutine.next().value } } } }

Have fun!


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