Deprecate left/centered/right column functions in Ui

CHANGELOG.md

@@ -30,7 +30,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * `egui::App`: added `fn name(&self)` and `fn clear_color(&self)`.
 
 ### Deprecated
-* Deprecated `RawInput::screen_size` - use `RawInput::screen_rect` instead.
+* `RawInput::screen_size` - use `RawInput::screen_rect` instead.
+* left/centered/right column functions on `Ui`.
 
 
 ## 0.5.0 - 2020-12-13

egui/src/demos/fractal_clock.rs

@@ -58,17 +58,17 @@ impl FractalClock {
             ui.available_rect_before_wrap_finite(),
         );
         self.paint(&painter);
+        // Make sure we allocate what we used (everything)
+        ui.expand_to_include_rect(painter.clip_rect());
 
         Frame::popup(ui.style())
             .fill(Rgba::luminance_alpha(0.02, 0.5).into())
             .stroke(Stroke::none())
-            .show(&mut ui.left_column(320.0), |ui| {
+            .show(ui, |ui| {
+                ui.set_max_width(270.0);
                 CollapsingHeader::new("Settings")
                     .show(ui, |ui| self.options_ui(ui, seconds_since_midnight));
             });
-
-        // Make sure we allocate what we used (everything)
-        ui.allocate_space(painter.clip_rect().size());
     }
 
     fn options_ui(&mut self, ui: &mut Ui, seconds_since_midnight: Option<f64>) {

egui/src/ui.rs

@@ -834,19 +834,26 @@ impl Ui {
         (ret, self.interact_hover(rect))
     }
 
+    #[deprecated]
     pub fn left_column(&mut self, width: f32) -> Self {
+        #[allow(deprecated)]
         self.column(Align::Min, width)
     }
 
+    #[deprecated]
     pub fn centered_column(&mut self, width: f32) -> Self {
+        #[allow(deprecated)]
         self.column(Align::Center, width)
     }
 
+    #[deprecated]
     pub fn right_column(&mut self, width: f32) -> Self {
+        #[allow(deprecated)]
         self.column(Align::Max, width)
     }
 
     /// A column ui with a given width.
+    #[deprecated]
     pub fn column(&mut self, column_position: Align, width: f32) -> Self {
         let x = match column_position {
             Align::Min => 0.0,