How to move a window without a title bar?

[saiprasadhakki]

I have removed the NK_WINDOW_TITLE and NK_WINDOW_MINIMIZABLE flags, so I don't see any title bar. Now I do have the NK_WINDOW_MOVABLE but I am not sure how to move the window.

[MLuc24]

It still works — the drag handle just shrinks to a sliver you are probably missing. In nuklear_panel.c the movable region is computed like this:

struct nk_rect header;
header.x = win->bounds.x;
header.y = win->bounds.y;
header.w = win->bounds.w;
if (nk_panel_has_header(win->flags, title)) {
    header.h = font->height + 2.0f * style->window.header.padding.y;
    header.h += 2.0f * style->window.header.label_padding.y;
} else header.h = panel_padding.y;

With a title bar you get the full header height to grab. Without one you fall into the else and the draggable strip becomes panel_padding.y tall — a few pixels along the very top edge of the window, full width. Aim there and it drags.

That padding is your window style, via nk_panel_get_padding:

case NK_PANEL_WINDOW: return style->window.padding;

so if a couple of pixels is impractical, widening it gives you a bigger handle:

ctx->style.window.padding.y = 12;

The tradeoff is that it also pushes your content down by the same amount, since it is genuine panel padding rather than a dedicated grab area — fine if your layout has room, annoying if it does not.

If you want a proper grab zone without the padding, the usual approach is to drop NK_WINDOW_MOVABLE and move the window yourself: put a widget where you want the handle, and when it is held, add ctx->input.mouse.delta to the window bounds with nk_window_set_position. That is essentially what the code above does, just with a rectangle you choose.