flo_animation 0.1.0

Describes a FlowBetween animation
Documentation 
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use super::element_id::*;

use super::super::raw_point::*;
use super::super::brush_properties::*;
use super::super::brush_definition::*;
use super::super::brush_drawing_style::*;

use std::sync::*;

///
/// Represents an edit involving painting
///
#[derive(Clone, PartialEq, Debug)]
pub enum PaintEdit {
    /// Selects the brush with the specified definition for painting
    SelectBrush(ElementId, BrushDefinition, BrushDrawingStyle),

    /// Sets the properties for brush strokes
    BrushProperties(ElementId, BrushProperties),

    /// Draws a brush stroke using the current brush and the specified set of input points
    BrushStroke(ElementId, Arc<Vec<RawPoint>>)
}

impl PaintEdit {
    ///
    /// If this edit contains an unassigned element ID, calls the specified function to supply a new
    /// element ID. If the edit already has an ID, leaves it unchanged.
    /// 
    pub fn assign_element_id<AssignFn: FnOnce() -> i64>(self, assign_element_id: AssignFn) -> PaintEdit {
        use self::PaintEdit::*;
        use self::ElementId::*;

        match self {
            SelectBrush(Unassigned, brush_def, brush_style) => SelectBrush(Assigned(assign_element_id()), brush_def, brush_style),
            BrushProperties(Unassigned, brush_props)        => BrushProperties(Assigned(assign_element_id()), brush_props),
            BrushStroke(Unassigned, points)                 => BrushStroke(Assigned(assign_element_id()), points),
            
            assigned => assigned
        }
    }
}