Slider.round to round slider value on a label

Fix #1045

Author: FeodorFitsner

package/lib/src/controls/slider.dart

@@ -89,6 +89,7 @@ class _SliderControlState extends State<SliderControl> {
     double min = widget.control.attrDouble("min", 0)!;
     double max = widget.control.attrDouble("max", 1)!;
     int? divisions = widget.control.attrInt("divisions");
+    int round = widget.control.attrInt("round", 0)!;
 
     final server = FletAppServices.of(context).server;
 
@@ -111,7 +112,8 @@ class _SliderControlState extends State<SliderControl> {
               min: min,
               max: max,
               divisions: divisions,
-              label: label?.replaceAll("{value}", _value.toString()),
+              label:
+                  label?.replaceAll("{value}", _value.toStringAsFixed(round)),
               activeColor: HexColor.fromString(Theme.of(context),
                   widget.control.attrString("activeColor", "")!),
               inactiveColor: HexColor.fromString(Theme.of(context),

sdk/python/packages/flet-core/src/flet_core/slider.py

@@ -72,6 +72,7 @@ def __init__(
         min: OptionalNumber = None,
         max: OptionalNumber = None,
         divisions: Optional[int] = None,
+        round: Optional[int] = None,
         autofocus: Optional[bool] = None,
         active_color: Optional[str] = None,
         inactive_color: Optional[str] = None,
@@ -115,6 +116,7 @@ def __init__(
         self.min = min
         self.max = max
         self.divisions = divisions
+        self.round = round
         self.autofocus = autofocus
         self.active_color = active_color
         self.inactive_color = inactive_color
@@ -164,7 +166,7 @@ def max(self) -> OptionalNumber:
     def max(self, value: OptionalNumber):
         self._set_attr("max", value)
 
-    # step
+    # divisions
     @property
     def divisions(self) -> Optional[int]:
         return self._get_attr("divisions")
@@ -173,6 +175,15 @@ def divisions(self) -> Optional[int]:
     def divisions(self, value: Optional[int]):
         self._set_attr("divisions", value)
 
+    # round
+    @property
+    def round(self) -> Optional[int]:
+        return self._get_attr("round")
+
+    @round.setter
+    def round(self, value: Optional[int]):
+        self._set_attr("round", value)
+
     # autofocus
     @property
     def autofocus(self) -> Optional[bool]: