Better handling of forcibly trying to shink something that can't be

emigui/src/containers/resize.rs

@@ -179,10 +179,18 @@ impl Resize {
         let inner_rect = Rect::from_min_size(region.cursor(), state.size);
         let desired_size = {
             let mut contents_region = region.child_region(inner_rect);
+            contents_region.clip_rect = region
+                .clip_rect()
+                .intersect(&inner_rect.expand(region.style().clip_rect_margin));
+
+            // region.debug_text_at(
+            //     inner_rect.min + last_frame_size,
+            //     &format!("last_frame_size: {:?}", last_frame_size),
+            // );
 
             // If we pull the resize handle to shrink, we want to TRY to shink it.
             // After laying out the contents, we might be much bigger.
-            // In those cases we don't want the clip_rect too be smaller, because
+            // In those cases we don't want the clip_rect to be smaller, because
             // then we will clip the contents of the region even thought the result gets larger. This is simply ugly!
             contents_region.clip_rect.max = contents_region
                 .clip_rect

emigui/src/containers/scroll_area.rs

@@ -8,6 +8,7 @@ pub struct State {
     pub show_scroll: bool, // TODO: default value?
 }
 
+// TODO: rename VScroll
 #[derive(Clone, Debug)]
 pub struct ScrollArea {
     max_height: f32,
@@ -59,29 +60,44 @@ impl ScrollArea {
         // outer: size of scroll area including scroll bar(s)
         // inner: excluding scroll bar(s). The area we clip the contents to.
 
-        let scroll_bar_width = 16.0;
+        let max_scroll_bar_width = 16.0;
+
+        let current_scroll_bar_width = if state.show_scroll || !self.auto_hide_scroll {
+            max_scroll_bar_width // TODO: animate?
+        } else {
+            0.0
+        };
 
         let outer_size = vec2(
             outer_region.available_width(),
             outer_region.available_height().min(self.max_height),
         );
-        let outer_rect = Rect::from_min_size(outer_region.cursor, outer_size);
 
-        let inner_size = if state.show_scroll || !self.auto_hide_scroll {
-            outer_size - vec2(scroll_bar_width, 0.0) // TODO: animate?
-        } else {
-            outer_size
-        };
+        let inner_size = outer_size - vec2(current_scroll_bar_width, 0.0);
         let inner_rect = Rect::from_min_size(outer_region.cursor, inner_size);
 
         let mut content_region = outer_region.child_region(Rect::from_min_size(
             outer_region.cursor() - state.offset,
             vec2(inner_size.x, f32::INFINITY),
         ));
-        content_region.clip_rect = outer_region.clip_rect().intersect(&inner_rect);
+        // content_region.clip_rect = outer_region.clip_rect().intersect(&inner_rect);
+        content_region.clip_rect = outer_region.clip_rect(); // Nice handling of forced resizing beyon the possible
         add_contents(&mut content_region);
         let content_size = content_region.bounding_size();
 
+        let inner_rect = Rect::from_min_size(
+            inner_rect.min,
+            vec2(
+                inner_rect.width().max(content_size.x), // Expand width to fit content
+                inner_rect.height(),
+            ),
+        );
+
+        let outer_rect = Rect::from_min_size(
+            inner_rect.min,
+            inner_rect.size() + vec2(current_scroll_bar_width, 0.0),
+        );
+
         let content_interact = outer_region.interact_rect(&inner_rect, scroll_area_id.with("area"));
         if content_interact.active {
             // Dragging scroll area to scroll:
@@ -166,10 +182,11 @@ impl ScrollArea {
         }
 
         // let size = content_size.min(inner_rect.size());
-        let size = vec2(
-            content_size.x, // ignore inner_rect, i.e. try to expand horizontally if necessary
-            content_size.y.min(inner_rect.size().y), // respect vertical height.
-        );
+        // let size = vec2(
+        //     content_size.x, // ignore inner_rect, i.e. try to expand horizontally if necessary
+        //     content_size.y.min(inner_rect.size().y), // respect vertical height.
+        // );
+        let size = outer_rect.size();
         outer_region.reserve_space(size, None);
 
         state.offset.y = state.offset.y.min(content_size.y - inner_rect.height());

emigui/src/region.rs

@@ -52,9 +52,6 @@ pub struct Region {
     pub(crate) cursor: Pos2,
 }
 
-// Allow child widgets to be just on the border and still have an outline with some thickness
-const CLIP_RECT_MARGIN: f32 = 3.0;
-
 impl Region {
     // ------------------------------------------------------------------------
     // Creation:
@@ -65,7 +62,7 @@ impl Region {
             ctx,
             id,
             layer,
-            clip_rect: rect.expand(CLIP_RECT_MARGIN),
+            clip_rect: rect.expand(style.clip_rect_margin),
             desired_rect: rect,
             child_bounds: Rect::from_min_size(rect.min, Vec2::zero()), // TODO: Rect::nothing() ?
             style,
@@ -76,9 +73,10 @@ impl Region {
     }
 
     pub fn child_region(&self, child_rect: Rect) -> Self {
-        let clip_rect = self
-            .clip_rect
-            .intersect(&child_rect.expand(CLIP_RECT_MARGIN));
+        // let clip_rect = self
+        //     .clip_rect
+        //     .intersect(&child_rect.expand(self.style().clip_rect_margin));
+        let clip_rect = self.clip_rect(); // Keep it unless the child explciitly desires differently
         Region {
             ctx: self.ctx.clone(),
             layer: self.layer,
@@ -374,7 +372,11 @@ impl Region {
 
     /// Paint some debug text at current cursor
     pub fn debug_text(&self, text: &str) {
-        self.ctx.debug_text(self.cursor, text);
+        self.debug_text_at(self.cursor, text);
+    }
+
+    pub fn debug_text_at(&self, pos: Pos2, text: &str) {
+        self.ctx.debug_text(pos, text);
     }
 
     /// Show some text anywhere in the region.

emigui/src/style.rs

@@ -37,6 +37,9 @@ pub struct Style {
 
     pub window: Window,
 
+    /// Allow child widgets to be just on the border and still have an outline with some thickness
+    pub clip_rect_margin: f32,
+
     // -----------------------------------------------
     // Debug rendering:
     pub debug_regions: bool,
@@ -61,6 +64,7 @@ impl Default for Style {
             text_cursor_width: 2.0,
             animation_time: 1.0 / 20.0,
             window: Window::default(),
+            clip_rect_margin: 3.0,
             debug_regions: false,
         }
     }