[refactor] introduce NumExt with at_least and at_most

`x.min(maxumim)` can be confusing but `x.at_most(maximum)` is very clear

TODO.md

@@ -68,7 +68,7 @@ TODO-list for the Egui project. If you looking for something to do, look here.
   * [ ] Thin circles look bad
   * [ ] Allow adding multiple tooltips to the same widget, showing them all one after the other.
 * Math
-  * [ ] Change `width.min(max_width)` to `width.at_most(max_width)`
+  * [x] Change `width.min(max_width)` to `width.at_most(max_width)`
 * Id
   * struct TempId(u64); struct StateId(u64);
     * `TempId` is count-based. Only good for interaction. Can't be used for storing state.

egui/src/containers/collapsing_header.rs

@@ -191,7 +191,9 @@ impl CollapsingHeader {
             desired_width,
             galley.size.y + 2.0 * ui.style().spacing.button_padding.y,
         );
-        desired_size.y = desired_size.y.max(ui.style().spacing.clickable_diameter);
+        desired_size.y = desired_size
+            .y
+            .at_least(ui.style().spacing.clickable_diameter);
         let rect = ui.allocate_space(desired_size);
         let rect = rect.expand2(ui.style().spacing.button_expand);
 

egui/src/containers/resize.rs

@@ -140,7 +140,10 @@ impl Resize {
         let mut state = ui.memory().resize.get(&id).cloned().unwrap_or_else(|| {
             ui.ctx().request_repaint(); // counter frame delay
 
-            let default_size = self.default_size.max(self.min_size);
+            let default_size = self
+                .default_size
+                .at_least(self.min_size)
+                .at_most(self.max_size);
 
             State {
                 desired_size: default_size,
@@ -149,8 +152,10 @@ impl Resize {
             }
         });
 
-        state.desired_size = state.desired_size.max(self.min_size);
+        state.desired_size = state
-        state.desired_size = state.desired_size.min(self.max_size);
+            .desired_size
+            .at_least(self.min_size)
+            .at_most(self.max_size);
 
         let position = ui.available().min;
 
@@ -174,8 +179,10 @@ impl Resize {
         if let Some(requested_size) = state.requested_size.take() {
             state.desired_size = requested_size;
         }
-        state.desired_size = state.desired_size.max(self.min_size);
+        state.desired_size = state
-        state.desired_size = state.desired_size.min(self.max_size);
+            .desired_size
+            .at_least(self.min_size)
+            .at_most(self.max_size);
 
         // ------------------------------
 

egui/src/containers/scroll_area.rs

@@ -94,7 +94,7 @@ impl ScrollArea {
 
         let outer_size = vec2(
             ui.available().width(),
-            ui.available().height().min(max_height),
+            ui.available().height().at_most(max_height),
         );
 
         let inner_size = outer_size - vec2(current_scroll_bar_width, 0.0);

egui/src/containers/window.rs

@@ -255,7 +255,7 @@ impl<'open> Window<'open> {
                 &mut collapsing,
                 collapsible,
             );
-            resize.min_size.x = resize.min_size.x.max(title_bar.rect.width()); // Prevent making window smaller than title bar width
+            resize.min_size.x = resize.min_size.x.at_least(title_bar.rect.width()); // Prevent making window smaller than title bar width
 
             let content_rect = collapsing
                 .add_contents(&mut frame.content_ui, collapsing_id, |ui| {

egui/src/introspection.rs

@@ -36,8 +36,8 @@ impl Texture {
                 let v = remap_clamp(pos.y, rect.range_y(), 0.0..=tex_h);
 
                 let texel_radius = 32.0;
-                let u = u.max(texel_radius).min(tex_w - texel_radius);
+                let u = u.at_least(texel_radius).at_most(tex_w - texel_radius);
-                let v = v.max(texel_radius).min(tex_h - texel_radius);
+                let v = v.at_least(texel_radius).at_most(tex_h - texel_radius);
 
                 let uv_rect = Rect::from_min_max(
                     pos2((u - texel_radius) / tex_w, (v - texel_radius) / tex_h),

egui/src/math/mod.rs

@@ -180,3 +180,49 @@ fn test_remap() {
     assert_eq!(remap_clamp(1.0, 1.0..=0.0, 16.0..=0.0), 16.0);
     assert_eq!(remap_clamp(0.5, 1.0..=0.0, 16.0..=0.0), 8.0);
 }
+
+// ----------------------------------------------------------------------------
+
+pub trait NumExt {
+    /// More readable version of `self.max(lower_limit)`
+    fn at_least(self, lower_limit: Self) -> Self;
+
+    /// More readable version of `self.min(upper_limit)`
+    fn at_most(self, upper_limit: Self) -> Self;
+}
+
+impl NumExt for f32 {
+    /// More readable version of `self.max(lower_limit)`
+    fn at_least(self, lower_limit: Self) -> Self {
+        self.max(lower_limit)
+    }
+
+    /// More readable version of `self.min(upper_limit)`
+    fn at_most(self, upper_limit: Self) -> Self {
+        self.min(upper_limit)
+    }
+}
+
+impl NumExt for Vec2 {
+    /// More readable version of `self.max(lower_limit)`
+    fn at_least(self, lower_limit: Self) -> Self {
+        self.max(lower_limit)
+    }
+
+    /// More readable version of `self.min(upper_limit)`
+    fn at_most(self, upper_limit: Self) -> Self {
+        self.min(upper_limit)
+    }
+}
+
+impl NumExt for Pos2 {
+    /// More readable version of `self.max(lower_limit)`
+    fn at_least(self, lower_limit: Self) -> Self {
+        self.max(lower_limit)
+    }
+
+    /// More readable version of `self.min(upper_limit)`
+    fn at_most(self, upper_limit: Self) -> Self {
+        self.min(upper_limit)
+    }
+}

egui/src/paint/tessellator.rs

@@ -710,8 +710,8 @@ fn tessellate_paint_command(
             if !rect.is_empty() {
                 // It is common to (sometimes accidentally) create an infinitely sized rectangle.
                 // Make sure we can handle that:
-                rect.min = rect.min.max(pos2(-1e7, -1e7));
+                rect.min = rect.min.at_least(pos2(-1e7, -1e7));
-                rect.max = rect.max.min(pos2(1e7, 1e7));
+                rect.max = rect.max.at_most(pos2(1e7, 1e7));
 
                 path::rounded_rectangle(scratchpad_points, rect, corner_radius);
                 path.add_line_loop(scratchpad_points);

egui/src/ui.rs

@@ -197,7 +197,7 @@ impl Ui {
     /// You won't be able to shrink it beyond its current child bounds.
     pub fn set_desired_width(&mut self, width: f32) {
         let min_width = self.child_bounds.max.x - self.top_left().x;
-        let width = width.max(min_width);
+        let width = width.at_least(min_width);
         self.desired_rect.max.x = self.top_left().x + width;
     }
 
@@ -205,7 +205,7 @@ impl Ui {
     /// You won't be able to shrink it beyond its current child bounds.
     pub fn set_desired_height(&mut self, height: f32) {
         let min_height = self.child_bounds.max.y - self.top_left().y;
-        let height = height.max(min_height);
+        let height = height.at_least(min_height);
         self.desired_rect.max.y = self.top_left().y + height;
     }
 
@@ -584,7 +584,7 @@ impl Ui {
     /// After `add_contents` is called the contents of `bounding_size`
     /// will decide how much space will be used in the parent ui.
     pub fn add_custom_contents(&mut self, size: Vec2, add_contents: impl FnOnce(&mut Ui)) -> Rect {
-        let size = size.min(self.available().size());
+        let size = size.at_most(self.available().size());
         let child_rect = Rect::from_min_size(self.cursor, size);
         let mut child_ui = self.child_ui(child_rect);
         add_contents(&mut child_ui);

egui/src/widgets/color_picker.rs

@@ -64,7 +64,7 @@ fn color_button(ui: &mut Ui, color: Srgba) -> Response {
     background_checkers(ui.painter(), rect);
     ui.painter().add(PaintCmd::Rect {
         rect,
-        corner_radius: visuals.corner_radius.min(2.0),
+        corner_radius: visuals.corner_radius.at_most(2.0),
         fill: color,
         stroke: visuals.fg_stroke,
     });

egui/src/widgets/mod.rs

@@ -292,7 +292,9 @@ impl Widget for Button {
         let font = &ui.fonts()[text_style];
         let galley = font.layout_multiline(text, ui.available().width());
         let mut desired_size = galley.size + 2.0 * ui.style().spacing.button_padding;
-        desired_size.y = desired_size.y.max(ui.style().spacing.clickable_diameter);
+        desired_size.y = desired_size
+            .y
+            .at_least(ui.style().spacing.clickable_diameter);
         let rect = ui.allocate_space(desired_size);
         let rect = rect.expand2(ui.style().spacing.button_expand);
 
@@ -355,7 +357,9 @@ impl<'a> Widget for Checkbox<'a> {
         let button_padding = ui.style().spacing.button_padding;
         let mut desired_size =
             button_padding + vec2(icon_width, 0.0) + galley.size + button_padding;
-        desired_size.y = desired_size.y.max(ui.style().spacing.clickable_diameter);
+        desired_size.y = desired_size
+            .y
+            .at_least(ui.style().spacing.clickable_diameter);
         let rect = ui.allocate_space(desired_size);
 
         let response = ui.interact(rect, id, Sense::click());
@@ -437,7 +441,9 @@ impl Widget for RadioButton {
         let button_padding = ui.style().spacing.button_padding;
         let mut desired_size =
             button_padding + vec2(icon_width, 0.0) + galley.size + button_padding;
-        desired_size.y = desired_size.y.max(ui.style().spacing.clickable_diameter);
+        desired_size.y = desired_size
+            .y
+            .at_least(ui.style().spacing.clickable_diameter);
         let rect = ui.allocate_space(desired_size);
 
         let response = ui.interact(rect, id, Sense::click());
@@ -633,7 +639,7 @@ impl<'a> Widget for DragValue<'a> {
         } = self;
         let value = get(&mut value_function);
         let aim_rad = ui.input().physical_pixel_size(); // ui.input().aim_radius(); // TODO
-        let precision = (aim_rad / speed.abs()).log10().ceil().max(0.0) as usize;
+        let precision = (aim_rad / speed.abs()).log10().ceil().at_least(0.0) as usize;
         let value_text = format_with_minimum_precision(value as f32, precision); //  TODO: full precision
 
         let kb_edit_id = ui.make_position_id().with("edit");

egui/src/widgets/slider.rs

@@ -272,7 +272,7 @@ impl<'a> Widget for Slider<'a> {
         let font = &ui.fonts()[text_style];
         let height = font
             .line_spacing()
-            .max(ui.style().spacing.clickable_diameter);
+            .at_least(ui.style().spacing.clickable_diameter);
 
         if let Some(text) = &self.text {
             self.id = self.id.or_else(|| Some(ui.make_unique_child_id(text)));