Differences between Qt versions 5.0.2 and Qt 5.3

[pebbe]

I installed qml versions 0 and 1 against Qt versions 5.0.2 and 5.3

I build gofusion against all versions. (I made a few changes to make gofusion build with qml version 1)

With Qt version 5.0.2 the program runs fine. With Qt version 5.3 it show weird behavior. For instance, when it starts up with two numbers in different columns, and you press the down arrow, the nummers go to the bottom line, but no new number appears.

There is no difference in behavior between qml version 0 and 1.

I have no idea were this bug comes from. Is it in gofusion? Or has something changed from Qt 5.0.2 to 5.3 that qml doesn't handle correctly?

go version go1.3.1 linux/amd64

[niemeyer]

I'm not sure. I haven't tested the package much on Qt 5.3, other than checking that it basically works.

Do you have a small reproducible test case that shows the odd behavior?

[pebbe]

I found a way to fix it in gofusion.

The file gofusion.qml has this fragment:

            Behavior on x  {
                NumberAnimation  { duration: 500; easing.type: Easing.OutBounce;
                    onRunningChanged: {
                        if (!running) {
                            ctrl.handleMoveAnimationDone();
                        }
                    }
                }
            }
            Behavior on y  {
                NumberAnimation  { duration: 500; easing.type: Easing.OutBounce }
            }

When I change it to this, it works fine with Qt 5.3:

            Behavior on x  {
                NumberAnimation  { duration: 500; easing.type: Easing.OutBounce; 
                    onRunningChanged: {
                        if (!running) {
                            ctrl.handleMoveAnimationDone();
                        }
                    } 
                }
            }
            Behavior on y  {
                NumberAnimation  { duration: 500; easing.type: Easing.OutBounce; 
                    onRunningChanged: {
                        if (!running) {
                            ctrl.handleMoveAnimationDone();
                        }
                    } 
                }
            }

Without the change, vertical movements don't call handleMoveAnimationDone with Qt version 5.3.

With the change, horizontal and vertical movements call handleMoveAnimationDone twice with Qt version 5.0.2.

I don't know what to think of this.

[niemeyer]

It sounds like the behavior in 5.3 is correct. They've probably fixed a bug. There's no reason for the behavior on x to be affecting the behavior on y.