add set_plot_bounds method, giving users the ability to set the plot bounds themselves. (#2320)

* add set_plot_bounds method

* call it from_min_max for consistency with Rect

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

crates/egui/src/widgets/plot/mod.rs

@@ -1040,6 +1040,11 @@ impl PlotUi {
         *self.last_screen_transform.bounds()
     }
 
+    /// Set the plot bounds. Can be useful for implementing alternative plot navigation methods.
+    pub fn set_plot_bounds(&mut self, plot_bounds: PlotBounds) {
+        self.last_screen_transform.set_bounds(plot_bounds);
+    }
+
     /// Move the plot bounds. Can be useful for implementing alternative plot navigation methods.
     pub fn translate_bounds(&mut self, delta_pos: Vec2) {
         self.last_screen_transform.translate_bounds(delta_pos);

crates/egui/src/widgets/plot/transform.rs

@@ -18,6 +18,10 @@ impl PlotBounds {
         max: [-f64::INFINITY; 2],
     };
 
+    pub fn from_min_max(min: [f64; 2], max: [f64; 2]) -> Self {
+        Self { min, max }
+    }
+
     pub fn min(&self) -> [f64; 2] {
         self.min
     }