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|
use diaphragm_core::{
types::{Float, ShapeContext},
ComplexShape, DrawResult, DynDrawable, SolverContext,
};
#[derive(Clone)]
pub struct Spacer {
pub margin_left: Float,
pub margin_right: Float,
pub margin_top: Float,
pub margin_bottom: Float,
pub content: DynDrawable,
}
impl Spacer {
pub fn builder<T: Into<DynDrawable>>(drawable: T) -> SpacerBuilder {
SpacerBuilder::new(drawable)
}
}
impl ComplexShape for Spacer {
fn draw(&self, context: &ShapeContext, solver: &mut dyn SolverContext) -> DrawResult {
let mut result = DrawResult::new();
let bounds_left = context.bounds().left(solver);
let bounds_right = context.bounds().right(solver);
let bounds_top = context.bounds().top(solver);
let bounds_bottom = context.bounds().bottom(solver);
let wanted_content_left = solver.float_add(&[bounds_left, self.margin_left]);
let content_left = self.content.bounds().left(solver);
let content_left_constraint = solver.float_eq(content_left, wanted_content_left);
solver.constrain(content_left_constraint);
let wanted_content_right = solver.float_sub(&[bounds_right, self.margin_right]);
let content_right = self.content.bounds().right(solver);
let content_right_constraint = solver.float_eq(content_right, wanted_content_right);
solver.constrain(content_right_constraint);
let wanted_content_top = solver.float_add(&[bounds_top, self.margin_top]);
let content_top = self.content.bounds().top(solver);
let content_top_constraint = solver.float_eq(content_top, wanted_content_top);
solver.constrain(content_top_constraint);
let wanted_content_bottom = solver.float_sub(&[bounds_bottom, self.margin_bottom]);
let content_bottom = self.content.bounds().bottom(solver);
let content_bottom_constraint = solver.float_eq(content_bottom, wanted_content_bottom);
solver.constrain(content_bottom_constraint);
result.push_dyn(self.content.clone());
result
}
}
#[derive(Clone)]
pub struct SpacerBuilder {
pub margin_left: Option<Float>,
pub margin_right: Option<Float>,
pub margin_top: Option<Float>,
pub margin_bottom: Option<Float>,
pub content: DynDrawable,
}
impl SpacerBuilder {
pub fn new<T: Into<DynDrawable>>(drawable: T) -> Self {
SpacerBuilder {
margin_left: None,
margin_right: None,
margin_top: None,
margin_bottom: None,
content: drawable.into(),
}
}
pub fn margin_left(&mut self, margin_left: Float) -> &mut Self {
self.margin_left = Some(margin_left);
self
}
pub fn margin_right(&mut self, margin_right: Float) -> &mut Self {
self.margin_right = Some(margin_right);
self
}
pub fn margin_top(&mut self, margin_top: Float) -> &mut Self {
self.margin_top = Some(margin_top);
self
}
pub fn margin_bottom(&mut self, margin_bottom: Float) -> &mut Self {
self.margin_bottom = Some(margin_bottom);
self
}
pub fn vertical_align_center(&mut self, solver: &mut dyn SolverContext) -> &mut Self {
let vertical_margin = solver.new_free_float();
self.margin_top = Some(vertical_margin);
self.margin_bottom = Some(vertical_margin);
self
}
pub fn vertical_align_center_with(&mut self, margin: Float) -> &mut Self {
self.margin_top = Some(margin);
self.margin_bottom = Some(margin);
self
}
pub fn horizontal_align_center(&mut self, solver: &mut dyn SolverContext) -> &mut Self {
let horizontal_margin = solver.new_free_float();
self.margin_left = Some(horizontal_margin);
self.margin_right = Some(horizontal_margin);
self
}
pub fn horizontal_align_center_with(&mut self, margin: Float) -> &mut Self {
self.margin_left = Some(margin);
self.margin_right = Some(margin);
self
}
pub fn build(&self, solver: &mut dyn SolverContext) -> Spacer {
Spacer {
margin_left: self.margin_left.unwrap_or_else(|| solver.new_free_float()),
margin_right: self.margin_right.unwrap_or_else(|| solver.new_free_float()),
margin_top: self.margin_top.unwrap_or_else(|| solver.new_free_float()),
margin_bottom: self
.margin_bottom
.unwrap_or_else(|| solver.new_free_float()),
content: self.content.clone(),
}
}
}
|
