CODEWITHSUNDEEP
c++qtqt-designerqtgui
C. THIN
C. THIN

Reputation: 147

Qt QWidget multiple instances

We are multiple people working on one Qt app. I for one am implementing a library, which will be instanciated in multiple other parts of the app. This library has a display class+form along with it.

Until now I had simply created one single instance of the library, running on a dummy, and passed debug data to one instance of the display+form, and worked like that.

But now that core debugging is finished, goal is to have everything instantiable - not just the core library code, but also the form itself, and embed that form into other displays. Each caller/user would be reponsible for passing output data of the core library instance they are using to an instance of the form. Each instance of the form would separately display the information generated by a specific library instance, possibly with different display options - they are all independent.

Similarly, it is possible to enter values in my display. Goal is to be able to enter different values in different displays instantiated accross the app, and sending those to specific instances (caller's responsiblity).

Question is of course : how to do that ? Internet talks about promoting, but I still don't see anywhere in Qt Designer where to include so-called promoted objects in other objects.

TL;DR : : I want some existing form to appear in the menu on the left in Qt Designer to be able to instantiate it multiple times in other forms. How to do this ?

Thanks in advance for the help !

Charles

Upvotes: 0

Views: 1176

Answers (2)

LogicStuff
LogicStuff

Reputation: 19607

Qt QWidget multiple instances

You answered yourself. Qt Creator: "File->New->Qt->Qt Designer Form Class" with QWidget as a base class will suit you. Then you can promote a simple QWidget in the UI into this custom widget, to create an instance. Each instance will manage its own UI.

Upvotes: 1

Kuba hasn't forgotten Monica
Kuba hasn't forgotten Monica

Reputation: 98425

You can promote any QWidget to your control from within Qt Designer. Add a QWidget, right-click and promote.

Ideally, you should create a designer plugin for your control, make the relevant properties designable, and build the plugin as well as the library. That way you'll be able to drag your control from the palette, and it will behave like the real thing.

Upvotes: 2

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