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frang75 / nappgui_src

SDK for building cross-platform desktop apps in ANSI-C
https://www.nappgui.com
MIT License
448 stars 45 forks source link

Creating a custom control #49

Closed MikeLorenz closed 5 months ago

MikeLorenz commented 1 year ago

How would I go about creating a reusable custom control? For instance, if I wanted to take the "IP Address" sample and wrap those 4 textboxes, character filtering, and error checking into a single control that could be added to a window in a single step, how would I do that?

frang75 commented 1 year ago

Hi Mike! Thanks for the feedback and for using NAppGUI.

The IP-Input control works the way you describe. The editboxes, buttons, and logic are encapsulated in a Panel object, which is itself an individual control (or widget) that can be linked to any window.

Panel *ip_input(void);

If you want to get rid of the buttons, and keep only the 4 editboxes and the '.''s, you should remove the buttons and the layout(1,3) in ipinput.c.

You have a more advanced example in layoubind.h/.c where data structures are also linked within the panel itself

Panel *layoutbind(void);

Custom rehusable Panel complex_rehusable_panel

On the other hand, if what you are looking for is a "custom control" that allows you to draw whatever you want and have control of the mouse and/or keyboard, take a look at listbox.h/.c. This control uses a generic View and internally manages all the logic and drawing of the control. A more advanced example of a Custom Control would be tableview.h/.c.

Custom Control Lisboxes

I hope I've helped Greetings.