1 files changed, 121 insertions, 0 deletions

diff --git a/examples/lib-dfscq-log/src/labeled_delimiter.rs b/examples/lib-dfscq-log/src/labeled_delimiter.rs
new file mode 100644
index 0000000..5a1c610
--- /dev/null
+++ b/examples/lib-dfscq-log/src/labeled_delimiter.rs
@@ -0,0 +1,121 @@
+use diaphragm_core::{
+    core_shapes::{StraightPath, Text},
+    types::{Bounds, Float, Point2D, ShapeContext},
+    ComplexShape, DrawResult, Drawable, SolverContext,
+};
+
+#[derive(Debug, Clone)]
+pub struct Delimiter {
+    pub width: Float,
+    pub label: Drawable<Text>,
+}
+
+#[derive(Debug, Clone)]
+pub struct LabeledDelimiter {
+    pub delimiters: Vec<Delimiter>,
+    pub tick_height: Float,
+}
+
+impl ComplexShape for LabeledDelimiter {
+    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_bottom = context.bounds().bottom(solver);
+        let bounds_width = context.bounds().width(solver);
+
+        let tick_top = context.bounds().top(solver);
+        let tick_bottom = solver.float_add(&[tick_top, self.tick_height]);
+
+        let first_tick = Drawable::builder(StraightPath::new(vec![
+            context.bounds().top_left(solver),
+            Point2D::new(bounds_left, tick_bottom),
+        ]))
+        .bounds(
+            Bounds::builder()
+                .top(tick_top)
+                .left(bounds_left)
+                .height(self.tick_height)
+                .width(Float::Fixed(0.))
+                .build(solver),
+        )
+        .stroke(context.stroke().clone())
+        .build(solver);
+
+        let baseline_y = first_tick.bounds().vert_center(solver);
+
+        result.push(first_tick);
+
+        // TODO: split everything into functions
+
+        let baseline = Drawable::builder(StraightPath::new(vec![
+            Point2D::new(bounds_left, baseline_y),
+            Point2D::new(bounds_right, baseline_y),
+        ]))
+        .bounds(
+            Bounds::builder()
+                .top(baseline_y)
+                .left(bounds_left)
+                .width(bounds_width)
+                .height(Float::Fixed(0.))
+                .build(solver),
+        )
+        .stroke(context.stroke().clone())
+        .build(solver);
+
+        result.push(baseline);
+
+        let mut section_end = bounds_left;
+        let mut all_label_bottoms = vec![];
+
+        for &Delimiter {
+            width: section_width,
+            ref label,
+        } in &self.delimiters
+        {
+            let section_begin = section_end;
+            section_end = solver.float_add(&[section_end, section_width]);
+
+            let section_half_width = solver.float_div(section_width, Float::Fixed(2.));
+            let section_middle = solver.float_add(&[section_begin, section_half_width]);
+
+            let tick = Drawable::builder(StraightPath::new(vec![
+                Point2D::new(section_end, tick_top),
+                Point2D::new(section_end, tick_bottom),
+            ]))
+            .bounds(
+                Bounds::builder()
+                    .top(tick_top)
+                    .left(section_end)
+                    .height(self.tick_height)
+                    .width(Float::Fixed(0.))
+                    .build(solver),
+            )
+            .stroke(context.stroke().clone())
+            .build(solver);
+
+            result.push(tick);
+
+            let label_top = label.bounds().top(solver);
+            let label_bottom = label.bounds().bottom(solver);
+            let label_horiz_center = label.bounds().horiz_center(solver);
+
+            let label_top_constraint = solver.float_eq(label_top, tick_bottom);
+            solver.constrain(label_top_constraint);
+
+            let label_middle_constraint = solver.float_eq(label_horiz_center, section_middle);
+            solver.constrain(label_middle_constraint);
+
+            result.push(label.clone());
+
+            all_label_bottoms.push(label_bottom);
+        }
+
+        let wanted_bounds_bottom = solver.float_max(&all_label_bottoms);
+        let bounds_bottom_constraint = solver.float_eq(bounds_bottom, wanted_bounds_bottom);
+        solver.constrain(bounds_bottom_constraint);
+
+        result
+    }
+}