Struct DropdownState 

pub struct DropdownState {
    pub region_idx: usize,
    pub param_id: u32,
    pub popup_rect: (f32, f32, f32, f32),
    pub options: Vec<String>,
    pub selected: usize,
    pub hover_option: Option<usize>,
    pub scroll_offset: usize,
    pub visible_count: usize,
}

State for an open dropdown popup.

Fields

region_idx: usize

Region index of the dropdown widget that is open.

param_id: u32

Parameter ID of the open dropdown.

popup_rect: (f32, f32, f32, f32)

Popup bounding rect: (x, y, w, h).

options: Vec<String>

Option labels.

selected: usize

Currently selected index.

hover_option: Option<usize>

Index under the cursor within the popup.

scroll_offset: usize

First visible option index (for scrollable popups).

visible_count: usize

Number of visible options (may be less than options.len() if clamped).