You can try to force binding with Qt.binding(). -Even
From: Interest [mailto:interest-bounces+even.kristoffersen=honeywell....@qt-project.org] On Behalf Of Shantanu Tushar Sent: 14. juli 2017 11:27 To: interest@qt-project.org Subject: [Interest] Updating NumberAnimation from/to at runtime Hi, Consider the following code which draws two rectangles - a red rectangle which contains another blue rectangle. Rectangle { id: r1 anchors.centerIn: parent width: 300; height: 100 color: "red" Rectangle { id: r2 width: 100; height: 100 color: "blue" NumberAnimation on x { loops: Animation.Infinite from: 0; to: r1.width-r2.width duration: 1000 onToChanged: console.log(to) } } NumberAnimation on width { loops: Animation.Infinite from: 300; to: 100 duration: 10000 } } The blue rectangle is supposed to keep moving inside the red rectangle by means of a NumberAnimation. However, the width of the red rectangle changes according to another animation. I thought this will work fine and the blue rectangle will be confined to the red rectangle because of the following binding- to: r1.width-r2.width However, thats not what happens. The blue rectangle overflows the red rectangle, as if the binding never got updated. But, I can see that the `console.log(to)` does prove the binding is working. (Screenshot at http://i.imgur.com/yDTYbv9.png<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fi.imgur.com%2FyDTYbv9.png&data=02%7C01%7Ceven.kristoffersen%40honeywell.com%7C5b50a750b34e473ffd8708d4ca9a91e0%7C96ece5269c7d48b08daf8b93c90a5d18%7C0%7C0%7C636356212616706749&sdata=D17jHatSL1gf3XFPYQpAebB2e1H7T7nmzhLvi%2BPcB5g%3D&reserved=0> ) Is this a limitation of NumberAnimation? Or am I using it wrong? -- Shantanu Tushar (UTC +0530) shantanu.io<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fshantanu.io&data=02%7C01%7Ceven.kristoffersen%40honeywell.com%7C5b50a750b34e473ffd8708d4ca9a91e0%7C96ece5269c7d48b08daf8b93c90a5d18%7C0%7C0%7C636356212616706749&sdata=E80rwaltPVsx1m%2FToEC8aIY1%2F9fwpeFCfxrLlThOxTs%3D&reserved=0>
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