feat: expose events (on_double_tap, on_pan_start) in WindowDragArea (#5043)

* improve events typing in gesture_detector.py

* window.start_dragging

* delete window_drag_area.dart

* rework WindowDragArea inheriting from GestureDetector

* export more utils

Author: ndonkoHenri

packages/flet/lib/flet.dart

@@ -19,23 +19,41 @@ export 'src/models/page_size_view_model.dart';
 export 'src/utils.dart';
 export 'src/utils/alignment.dart';
 export 'src/utils/animations.dart';
+export 'src/utils/auto_complete.dart';
+export 'src/utils/autofill.dart';
+export 'src/utils/badge.dart';
 export 'src/utils/borders.dart';
 export 'src/utils/box.dart';
+export 'src/utils/browser_context_menu.dart';
 export 'src/utils/buttons.dart';
+export 'src/utils/charts.dart';
+export 'src/utils/client_storage.dart';
+export 'src/utils/clipboard.dart';
 export 'src/utils/collections.dart';
 export 'src/utils/colors.dart';
+export 'src/utils/cupertino_colors.dart';
+export 'src/utils/cupertino_icons.dart';
 export 'src/utils/dash_path.dart';
 export 'src/utils/debouncer.dart';
+export 'src/utils/desktop.dart';
+export 'src/utils/dismissible.dart';
 export 'src/utils/drawing.dart';
 export 'src/utils/edge_insets.dart';
+export 'src/utils/form_field.dart';
 export 'src/utils/gradient.dart';
 export 'src/utils/icons.dart';
 export 'src/utils/images.dart';
+export 'src/utils/launch_url.dart';
+export 'src/utils/locale.dart';
+export 'src/utils/markdown.dart';
+export 'src/utils/material_icons.dart';
 export 'src/utils/material_state.dart';
 export 'src/utils/menu.dart';
 export 'src/utils/mouse.dart';
+export 'src/utils/networking.dart';
 export 'src/utils/numbers.dart';
 export 'src/utils/others.dart';
+export 'src/utils/overlay_style.dart';
 export 'src/utils/platform.dart';
 export 'src/utils/platform_utils_non_web.dart'
     if (dart.library.js) "src/utils/platform_utils_web.dart";
@@ -45,4 +63,5 @@ export 'src/utils/text.dart';
 export 'src/utils/textfield.dart';
 export 'src/utils/theme.dart';
 export 'src/utils/time.dart';
+export 'src/utils/tooltip.dart';
 export 'src/utils/transforms.dart';

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

@@ -116,7 +116,6 @@ import 'textfield.dart';
 import 'time_picker.dart';
 import 'transparent_pointer.dart';
 import 'vertical_divider.dart';
-import 'window_drag_area.dart';
 
 Widget createControl(Control? parent, String id, bool parentDisabled,
     {Widget? nextChild, bool? parentAdaptive}) {
@@ -980,13 +979,6 @@ Widget createWidget(
         parentAdaptive: parentAdaptive,
         children: controlView.children,
       );
-    case "windowdragarea":
-      return WindowDragAreaControl(
-          parent: parent,
-          control: controlView.control,
-          children: controlView.children,
-          parentDisabled: parentDisabled,
-          parentAdaptive: parentAdaptive);
     case "linechart":
       return LineChartControl(
           key: key,

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

@@ -5,8 +5,6 @@ import 'package:flutter/foundation.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:device_info_plus/device_info_plus.dart';
 
-
-
 import 'actions.dart';
 import 'flet_control_backend.dart';
 import 'models/app_state.dart';
@@ -97,7 +95,8 @@ AppState appReducer(AppState state, dynamic action) {
             try {
               DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
               AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
-              if (androidInfo.systemFeatures.contains('android.software.leanback')) {
+              if (androidInfo.systemFeatures
+                  .contains('android.software.leanback')) {
                 platformValue = "android_tv";
               }
             } on Exception catch (e) {
@@ -324,6 +323,9 @@ AppState appReducer(AppState state, dynamic action) {
         case "windowToFront":
           windowToFront();
           break;
+        case "windowStartDragging":
+          windowStartDragging();
+          break;
       }
       var clientStoragePrefix = "clientStorage:";
       if (action.payload.methodName.startsWith(clientStoragePrefix)) {

packages/flet/lib/src/reducers.dart

@@ -235,6 +235,12 @@ Future windowToFront() async {
   }
 }
 
+Future windowStartDragging() async {
+  if (isDesktopPlatform()) {
+    await windowManager.startDragging();
+  }
+}
+
 Future blurWindow() async {
   if (isDesktopPlatform() &&
       (defaultTargetPlatform == TargetPlatform.windows ||

packages/flet/lib/src/utils/desktop.dart

@@ -10,19 +10,10 @@
 from typing import Optional, cast
 
 import flet.version
-import flet_cli.utils.processes as processes
 import yaml
 from flet.utils import cleanup_path, copy_tree, is_windows, slugify
 from flet.utils.platform_utils import get_bool_env_var
 from flet.version import update_version
-from flet_cli.commands.base import BaseCommand
-from flet_cli.utils.hash_stamp import HashStamp
-from flet_cli.utils.merge import merge_dict
-from flet_cli.utils.project_dependencies import (
-    get_poetry_dependencies,
-    get_project_dependencies,
-)
-from flet_cli.utils.pyproject_toml import load_pyproject_toml
 from packaging import version
 from packaging.requirements import Requirement
 from rich.console import Console, Group
@@ -33,6 +24,16 @@
 from rich.table import Column, Table
 from rich.theme import Theme
 
+import flet_cli.utils.processes as processes
+from flet_cli.commands.base import BaseCommand
+from flet_cli.utils.hash_stamp import HashStamp
+from flet_cli.utils.merge import merge_dict
+from flet_cli.utils.project_dependencies import (
+    get_poetry_dependencies,
+    get_project_dependencies,
+)
+from flet_cli.utils.pyproject_toml import load_pyproject_toml
+
 PYODIDE_ROOT_URL = "https://cdn.jsdelivr.net/pyodide/v0.27.2/full"
 DEFAULT_TEMPLATE_URL = "gh:flet-dev/flet-build-template"
 
@@ -75,7 +76,6 @@ def __init__(self, parser: argparse.ArgumentParser) -> None:
         self.python_module_name = None
         self.get_pyproject = None
         self.python_app_path = None
-        self.no_rich_output = None
         self.emojis = {}
         self.dart_exe = None
         self.verbose = False
@@ -1145,7 +1145,9 @@ def setup_template_data(self):
                 "target_arch": (
                     target_arch
                     if isinstance(target_arch, list)
-                    else [target_arch] if isinstance(target_arch, str) else []
+                    else [target_arch]
+                    if isinstance(target_arch, str)
+                    else []
                 ),
                 "info_plist": info_plist,
                 "macos_entitlements": macos_entitlements,

sdk/python/packages/flet-cli/src/flet_cli/commands/build.py

@@ -79,37 +79,39 @@ def __init__(
         exclude_from_semantics: Optional[bool] = None,
         trackpad_scroll_causes_scale: Optional[bool] = None,
         allowed_devices: Optional[Set[PointerDeviceType]] = None,
-        on_tap=None,
-        on_tap_down=None,
-        on_tap_up=None,
-        on_multi_tap=None,
-        multi_tap_touches=None,
-        on_multi_long_press=None,
-        on_secondary_tap=None,
-        on_secondary_tap_down=None,
-        on_secondary_tap_up=None,
-        on_long_press_start=None,
-        on_long_press_end=None,
-        on_secondary_long_press_start=None,
-        on_secondary_long_press_end=None,
-        on_double_tap=None,
-        on_double_tap_down=None,
-        on_horizontal_drag_start=None,
-        on_horizontal_drag_update=None,
-        on_horizontal_drag_end=None,
-        on_vertical_drag_start=None,
-        on_vertical_drag_update=None,
-        on_vertical_drag_end=None,
-        on_pan_start=None,
-        on_pan_update=None,
-        on_pan_end=None,
-        on_scale_start=None,
-        on_scale_update=None,
-        on_scale_end=None,
-        on_hover=None,
-        on_enter=None,
-        on_exit=None,
-        on_scroll=None,
+        on_tap: OptionalEventCallable["TapEvent"] = None,
+        on_tap_down: OptionalEventCallable["TapEvent"] = None,
+        on_tap_up: OptionalEventCallable["TapEvent"] = None,
+        on_multi_tap: OptionalEventCallable["TapEvent"] = None,
+        multi_tap_touches: Optional[int] = None,
+        on_multi_long_press: OptionalEventCallable["LongPressEndEvent"] = None,
+        on_secondary_tap: OptionalEventCallable["TapEvent"] = None,
+        on_secondary_tap_down: OptionalEventCallable["TapEvent"] = None,
+        on_secondary_tap_up: OptionalEventCallable["TapEvent"] = None,
+        on_long_press_start: OptionalEventCallable["LongPressEndEvent"] = None,
+        on_long_press_end: OptionalEventCallable["LongPressEndEvent"] = None,
+        on_secondary_long_press_start: OptionalEventCallable[
+            "LongPressEndEvent"
+        ] = None,
+        on_secondary_long_press_end: OptionalEventCallable["LongPressEndEvent"] = None,
+        on_double_tap: OptionalEventCallable["TapEvent"] = None,
+        on_double_tap_down: OptionalEventCallable["TapEvent"] = None,
+        on_horizontal_drag_start: OptionalEventCallable["DragStartEvent"] = None,
+        on_horizontal_drag_update: OptionalEventCallable["DragUpdateEvent"] = None,
+        on_horizontal_drag_end: OptionalEventCallable["DragEndEvent"] = None,
+        on_vertical_drag_start: OptionalEventCallable["DragStartEvent"] = None,
+        on_vertical_drag_update: OptionalEventCallable["DragUpdateEvent"] = None,
+        on_vertical_drag_end: OptionalEventCallable["DragEndEvent"] = None,
+        on_pan_start: OptionalEventCallable["DragStartEvent"] = None,
+        on_pan_update: OptionalEventCallable["DragUpdateEvent"] = None,
+        on_pan_end: OptionalEventCallable["DragEndEvent"] = None,
+        on_scale_start: OptionalEventCallable["ScaleStartEvent"] = None,
+        on_scale_update: OptionalEventCallable["ScaleUpdateEvent"] = None,
+        on_scale_end: OptionalEventCallable["ScaleEndEvent"] = None,
+        on_hover: OptionalEventCallable["HoverEvent"] = None,
+        on_enter: OptionalEventCallable["HoverEvent"] = None,
+        on_exit: OptionalEventCallable["HoverEvent"] = None,
+        on_scroll: OptionalEventCallable["ScrollEvent"] = None,
         #
         # ConstrainedControl
         #
@@ -329,6 +331,7 @@ def _get_control_name(self):
         return "gesturedetector"
 
     def before_update(self):
+        super().before_update()
         self._set_attr_json("allowedDevices", self.__allowed_devices)
 
     def _get_children(self):

sdk/python/packages/flet/src/flet/core/gesture_detector.py

@@ -503,6 +503,9 @@ def close(self) -> None:
     def to_front(self) -> None:
         self.page._invoke_method("windowToFront")
 
+    def start_dragging(self) -> None:
+        self.page._invoke_method("windowStartDragging")
+
     # Events
     # on_event
     @property