Struct DragPreviewConfig 

pub struct DragPreviewConfig {
    pub opacity: f32,
    pub offset_x: i16,
    pub offset_y: i16,
    pub width: u16,
    pub height: u16,
    pub background: Option<PackedRgba>,
    pub show_border: bool,
}

Configuration for the drag preview overlay.

Controls visual properties of the widget shown at the cursor during a drag.

Fields

opacity: f32

Opacity of the preview widget (0.0 = invisible, 1.0 = fully opaque). Default: 0.7.

offset_x: i16

Horizontal offset from cursor position in cells. Default: 1.

offset_y: i16

Vertical offset from cursor position in cells. Default: 1.

width: u16

Width of the preview area in cells. Default: 20.

height: u16

Height of the preview area in cells. Default: 1.

background: Option<PackedRgba>

Background color for the preview area.

show_border: bool

Whether to render a border around the preview. Default: false.

Implementations

impl DragPreviewConfig

pub fn with_opacity(self, opacity: f32) -> Self

Set opacity (clamped to 0.0..=1.0).

pub fn with_offset(self, x: i16, y: i16) -> Self

Set cursor offset.

pub fn with_size(self, width: u16, height: u16) -> Self

Set preview dimensions.

pub fn with_background(self, color: PackedRgba) -> Self

Set background color.

pub fn with_border(self) -> Self

Enable border rendering.

pub fn preview_rect(&self, cursor: Position, viewport: Rect) -> Option<Rect>

Calculate the preview area given cursor position and viewport bounds.

Clamps the preview rectangle to stay within the viewport. Returns None if the preview would be fully outside the viewport.

Trait Implementations

impl Clone for DragPreviewConfig

fn clone(&self) -> DragPreviewConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DragPreviewConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DragPreviewConfig

fn default() -> Self

Returns the “default value” for a type.