Not very sophisticated but something like the following might work for you:
1 SpinBox {
2 id: spin
3
4 property var history: []
5 property bool _internalUpdate: false
6
7 from: 0
8 to: 100
9 onValueChanged: {
10 if (!spin._internalUpdate) {
11 spin.history.push(value)
12 }
13 }
14 Component.onCompleted: {
15 spin.history.push(value)
16 }
17 }
18
19 Button {
20 text: <="" span="">
21 onClicked: {
22 if (spin.history.length > 0) {
23 spin._internalUpdate = true
24 spin.value = spin.history[
25 Math.max(0, spin.history.length - 2)
26 ]
27 spin._internalUpdate = false
28 if (spin.history.length > 1) {
29 spin.history.splice(spin.history.length - 1, 1)
30 }
31 }
32 }
Regards,
Furkan Üzümcü
On Mar 17, 2020, 16:26 -0400, Jérôme Godbout <godbo...@amotus.ca>, wrote:
> Hi,
> I’m trying to make an undo redo, I manage to have my whole thing working for
> user mouse drag n drop, add remove part into my model. One thing that bug me
> with the control 2 is the spinbox, the value is bind to the mode and the
> model get changed too, not sure this is the optimal way (I so wish we got 2
> way binding like C# one day, this is so deeply needed and not have everybody
> reimplement there own way).
>
> SpinBox
> {
> id: sequenceIndex_
>
> value: opsModel.index
>
> onValueChanged:
> {
> // This is called before value modified
> }
>
> onValueModified:
> {
> // The value is already modified, how can I get previous value to
> make my undo/redo ? seem too late and the value changed as already been called
> }
>
> Binding
> {
> target: ops_model
> property: "index"
> value: sequenceIndex_.value
> }
> }
>
> How does one manage to do it with this control?! I guess I will have the same
> challenge with the ComboBox and all the selector controls (button are fairly
> easy since I can capture the previous value before doing the action).
> _______________________________________________
> Interest mailing list
> Interest@qt-project.org
> https://lists.qt-project.org/listinfo/interest
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