CupertinoTimerPicker and CupertinorPicker Controls (flet-dev#2743)

* initial commit

* switch to ConstrainedControl

* remove children in CupertinoTimerPickerControl

* CupertinoTimerPicker: update types and defaults

* CupertinoPicker: initial commit

* Fix python side

* Fix pickers

* Make time picker work in seconds

---------

Co-authored-by: Feodor Fitsner <[email protected]>

packages/flet/lib/src/controls/create_control.dart

@@ -39,10 +39,12 @@ import 'cupertino_checkbox.dart';
 import 'cupertino_dialog_action.dart';
 import 'cupertino_list_tile.dart';
 import 'cupertino_navigation_bar.dart';
+import 'cupertino_picker.dart';
 import 'cupertino_radio.dart';
 import 'cupertino_slider.dart';
 import 'cupertino_switch.dart';
 import 'cupertino_textfield.dart';
+import 'cupertino_timer_picker.dart';
 import 'datatable.dart';
 import 'date_picker.dart';
 import 'dismissible.dart';
@@ -486,6 +488,22 @@ Widget createWidget(
           children: controlView.children,
           parentDisabled: parentDisabled,
           backend: backend);
+    case "cupertinotimerpicker":
+      return CupertinoTimerPickerControl(
+          parent: parent,
+          control: controlView.control,
+          parentDisabled: parentDisabled,
+          nextChild: nextChild,
+          backend: backend);
+    case "cupertinopicker":
+      return CupertinoPickerControl(
+          parent: parent,
+          control: controlView.control,
+          children: controlView.children,
+          parentAdaptive: parentAdaptive,
+          parentDisabled: parentDisabled,
+          nextChild: nextChild,
+          backend: backend);
     case "draggable":
       return DraggableControl(
           key: key,

packages/flet/lib/src/controls/cupertino_picker.dart

@@ -0,0 +1,147 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+import '../flet_control_backend.dart';
+import '../models/control.dart';
+import '../utils/colors.dart';
+import 'create_control.dart';
+import 'error.dart';
+
+const double _kItemExtent = 32.0;
+const double _kDefaultDiameterRatio = 1.07;
+const double _kSqueeze = 1.45;
+
+class CupertinoPickerControl extends StatefulWidget {
+  final Control? parent;
+  final Control control;
+  final List<Control> children;
+  final bool parentDisabled;
+  final bool? parentAdaptive;
+  final Widget? nextChild;
+  final FletControlBackend backend;
+
+  const CupertinoPickerControl(
+      {super.key,
+      this.parent,
+      required this.control,
+      required this.children,
+      required this.parentAdaptive,
+      required this.parentDisabled,
+      required this.nextChild,
+      required this.backend});
+
+  @override
+  State<CupertinoPickerControl> createState() => _CupertinoPickerControlState();
+}
+
+class _CupertinoPickerControlState extends State<CupertinoPickerControl> {
+  Widget _createPicker() {
+    bool disabled = widget.control.isDisabled || widget.parentDisabled;
+
+    List<Widget> ctrls = widget.children.where((c) => c.isVisible).map((c) {
+      return Center(
+          child: createControl(widget.control, c.id, disabled,
+              parentAdaptive: widget.parentAdaptive));
+    }).toList();
+
+    double itemExtent = widget.control.attrDouble("itemExtent", _kItemExtent)!;
+    int? selectedIndex = widget.control.attrInt("selectedIndex");
+    double diameterRatio =
+        widget.control.attrDouble("diameterRatio", _kDefaultDiameterRatio)!;
+    double magnification = widget.control.attrDouble("magnification", 1.0)!;
+    double squeeze = widget.control.attrDouble("squeeze", _kSqueeze)!;
+    double offAxisFraction = widget.control.attrDouble("offAxisFraction", 0.0)!;
+    bool useMagnifier = widget.control.attrBool("useMagnifier", false)!;
+    bool looping = widget.control.attrBool("looping", false)!;
+    Color? backgroundColor = HexColor.fromString(
+        Theme.of(context), widget.control.attrString("bgColor", "")!);
+
+    Widget picker = CupertinoPicker(
+      backgroundColor: backgroundColor,
+      diameterRatio: diameterRatio,
+      magnification: magnification,
+      squeeze: squeeze,
+      offAxisFraction: offAxisFraction,
+      itemExtent: itemExtent,
+      useMagnifier: useMagnifier,
+      looping: looping,
+      onSelectedItemChanged: (int index) {
+        widget.backend.updateControlState(
+            widget.control.id, {"selectedIndex": index.toString()});
+        widget.backend
+            .triggerControlEvent(widget.control.id, "change", index.toString());
+      },
+      scrollController: selectedIndex != null
+          ? FixedExtentScrollController(initialItem: selectedIndex)
+          : null,
+      children: ctrls,
+    );
+
+    return Container(
+      height: 216,
+      padding: const EdgeInsets.only(top: 6.0),
+      // The Bottom margin is provided to align the popup above the system navigation bar.
+      margin: EdgeInsets.only(
+        bottom: MediaQuery.of(context).viewInsets.bottom,
+      ),
+      // Provide a background color for the popup.
+      color: CupertinoColors.systemBackground.resolveFrom(context),
+      // Use a SafeArea widget to avoid system overlaps.
+      child: SafeArea(
+        top: false,
+        child: picker,
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    debugPrint("CupertinoPicker build: ${widget.control.id}");
+
+    bool lastOpen = widget.control.state["open"] ?? false;
+
+    var open = widget.control.attrBool("open", false)!;
+    var modal = widget.control.attrBool("modal", false)!;
+
+    debugPrint("Current open state: $lastOpen");
+    debugPrint("New open state: $open");
+
+    if (open && (open != lastOpen)) {
+      var dialog = _createPicker();
+      if (dialog is ErrorControl) {
+        return dialog;
+      }
+
+      // close previous dialog
+      if (ModalRoute.of(context)?.isCurrent != true) {
+        Navigator.of(context).pop();
+      }
+
+      widget.control.state["open"] = open;
+
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        showCupertinoModalPopup(
+            barrierDismissible: !modal,
+            useRootNavigator: false,
+            context: context,
+            builder: (context) => _createPicker()).then((value) {
+          lastOpen = widget.control.state["open"] ?? false;
+          debugPrint("Picker should be dismissed ($hashCode): $lastOpen");
+          bool shouldDismiss = lastOpen;
+          widget.control.state["open"] = false;
+
+          if (shouldDismiss) {
+            widget.backend
+                .updateControlState(widget.control.id, {"open": "false"});
+            widget.backend
+                .triggerControlEvent(widget.control.id, "dismiss", "");
+          }
+        });
+      });
+    } else if (open != lastOpen && lastOpen) {
+      Navigator.of(context).pop();
+    }
+
+    return widget.nextChild ?? const SizedBox.shrink();
+  }
+}

packages/flet/lib/src/controls/cupertino_timer_picker.dart

@@ -0,0 +1,132 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+import '../flet_control_backend.dart';
+import '../models/control.dart';
+import '../utils/alignment.dart';
+import '../utils/colors.dart';
+import 'error.dart';
+
+class CupertinoTimerPickerControl extends StatefulWidget {
+  final Control? parent;
+  final Control control;
+  final bool parentDisabled;
+  final Widget? nextChild;
+
+  final FletControlBackend backend;
+
+  const CupertinoTimerPickerControl(
+      {super.key,
+      this.parent,
+      required this.control,
+      required this.parentDisabled,
+      required this.nextChild,
+      required this.backend});
+
+  @override
+  State<CupertinoTimerPickerControl> createState() =>
+      _CupertinoTimerPickerControlState();
+}
+
+class _CupertinoTimerPickerControlState
+    extends State<CupertinoTimerPickerControl> {
+  Widget _createPicker() {
+    int value = widget.control.attrInt("value", 0)!;
+    Duration initialTimerDuration = Duration(seconds: value);
+    int minuteInterval =
+        widget.control.attrDouble("minuteInterval", 1)!.toInt();
+    int secondInterval =
+        widget.control.attrDouble("secondInterval", 1)!.toInt();
+    CupertinoTimerPickerMode mode = CupertinoTimerPickerMode.values.firstWhere(
+        (a) =>
+            a.name.toLowerCase() ==
+            widget.control.attrString("mode", "")!.toLowerCase(),
+        orElse: () => CupertinoTimerPickerMode.hms);
+
+    Color? backgroundColor = HexColor.fromString(
+        Theme.of(context), widget.control.attrString("bgColor", "")!);
+
+    Widget picker = CupertinoTimerPicker(
+      mode: mode,
+      initialTimerDuration: initialTimerDuration,
+      minuteInterval: minuteInterval,
+      secondInterval: secondInterval,
+      alignment:
+          parseAlignment(widget.control, "alignment") ?? Alignment.center,
+      backgroundColor: backgroundColor,
+      onTimerDurationChanged: (Duration d) {
+        widget.backend.updateControlState(
+            widget.control.id, {"value": d.inSeconds.toString()});
+        widget.backend.triggerControlEvent(
+            widget.control.id, "change", d.inSeconds.toString());
+      },
+    );
+
+    return Container(
+      height: 216,
+      padding: const EdgeInsets.only(top: 6.0),
+      // The Bottom margin is provided to align the popup above the system navigation bar.
+      margin: EdgeInsets.only(
+        bottom: MediaQuery.of(context).viewInsets.bottom,
+      ),
+      // Provide a background color for the popup.
+      color: CupertinoColors.systemBackground.resolveFrom(context),
+      // Use a SafeArea widget to avoid system overlaps.
+      child: SafeArea(
+        top: false,
+        child: picker,
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    debugPrint("CupertinoTimerPicker build: ${widget.control.id}");
+
+    bool lastOpen = widget.control.state["open"] ?? false;
+
+    var open = widget.control.attrBool("open", false)!;
+    var modal = widget.control.attrBool("modal", false)!;
+
+    debugPrint("Current open state: $lastOpen");
+    debugPrint("New open state: $open");
+
+    if (open && (open != lastOpen)) {
+      var dialog = _createPicker();
+      if (dialog is ErrorControl) {
+        return dialog;
+      }
+
+      // close previous dialog
+      if (ModalRoute.of(context)?.isCurrent != true) {
+        Navigator.of(context).pop();
+      }
+
+      widget.control.state["open"] = open;
+
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        showCupertinoModalPopup(
+            barrierDismissible: !modal,
+            useRootNavigator: false,
+            context: context,
+            builder: (context) => _createPicker()).then((value) {
+          lastOpen = widget.control.state["open"] ?? false;
+          debugPrint("Picker should be dismissed ($hashCode): $lastOpen");
+          bool shouldDismiss = lastOpen;
+          widget.control.state["open"] = false;
+
+          if (shouldDismiss) {
+            widget.backend
+                .updateControlState(widget.control.id, {"open": "false"});
+            widget.backend
+                .triggerControlEvent(widget.control.id, "dismiss", "");
+          }
+        });
+      });
+    } else if (open != lastOpen && lastOpen) {
+      Navigator.of(context).pop();
+    }
+
+    return widget.nextChild ?? const SizedBox.shrink();
+  }
+}

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

@@ -77,10 +77,15 @@
 from flet_core.cupertino_filled_button import CupertinoFilledButton
 from flet_core.cupertino_list_tile import CupertinoListTile
 from flet_core.cupertino_navigation_bar import CupertinoNavigationBar
+from flet_core.cupertino_picker import CupertinoPicker
 from flet_core.cupertino_radio import CupertinoRadio
 from flet_core.cupertino_slider import CupertinoSlider
 from flet_core.cupertino_switch import CupertinoSwitch
 from flet_core.cupertino_textfield import CupertinoTextField, VisibilityMode
+from flet_core.cupertino_timer_picker import (
+    CupertinoTimerPicker,
+    CupertinoTimerPickerMode,
+)
 from flet_core.datatable import (
     DataCell,
     DataColumn,

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

@@ -1,18 +1,10 @@
 from typing import Any, List, Optional, Union
 
-from flet_core.adaptive_control import AdaptiveControl
 from flet_core.control import Control, OptionalNumber
 from flet_core.ref import Ref
-from flet_core.types import (
-    AnimationValue,
-    OffsetValue,
-    ResponsiveNumber,
-    RotateValue,
-    ScaleValue,
-)
 
 
-class CupertinoActionSheet(AdaptiveControl):
+class CupertinoActionSheet(Control):
     """
     An iOS-style action sheet.
 
@@ -31,13 +23,12 @@ def __init__(
         open: bool = False,
         on_dismiss=None,
         #
-        # ConstrainedControl and AdaptiveControl
+        # Control
         #
         ref: Optional[Ref] = None,
         visible: Optional[bool] = None,
         disabled: Optional[bool] = None,
         data: Any = None,
-        adaptive: Optional[bool] = None,
     ):
         Control.__init__(
             self,
@@ -47,8 +38,6 @@ def __init__(
             data=data,
         )
 
-        AdaptiveControl.__init__(self, adaptive=adaptive)
-
         self.cancel = cancel
         self.title = title
         self.message = message