Determine in which direction the Dismissible was dismissed (flet-de…

…v#2330)

* pass DismissDirection as e.data

* add DismissibleDismissEvent

package/lib/src/controls/dismissible.dart

@@ -59,7 +59,7 @@ class DismissibleControl extends StatelessWidget {
                 : Container(color: Colors.transparent),
             onDismissed: (DismissDirection d) {
               server.sendPageEvent(
-                  eventTarget: control.id, eventName: "dismiss", eventData: "");
+                  eventTarget: control.id, eventName: "dismiss", eventData: d.name);
             },
             onResize: () {
               server.sendPageEvent(

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

@@ -21,9 +21,6 @@
 from flet_core.audio import Audio
 from flet_core.badge import Badge
 from flet_core.banner import Banner
-from flet_core.menu_bar import MenuBar, MenuStyle
-from flet_core.submenu_button import SubmenuButton
-from flet_core.menu_item_button import MenuItemButton
 from flet_core.blur import Blur, BlurTileMode
 from flet_core.border import Border, BorderSide
 from flet_core.border_radius import BorderRadius
@@ -79,7 +76,7 @@
     DataTable,
 )
 from flet_core.date_picker import DatePicker, DatePickerEntryMode, DatePickerMode
-from flet_core.dismissible import Dismissible
+from flet_core.dismissible import Dismissible, DismissibleDismissEvent
 from flet_core.divider import Divider
 from flet_core.drag_target import DragTarget, DragTargetAcceptEvent
 from flet_core.draggable import Draggable
@@ -130,6 +127,8 @@
 from flet_core.list_view import ListView
 from flet_core.margin import Margin
 from flet_core.markdown import Markdown, MarkdownExtensionSet
+from flet_core.menu_bar import MenuBar, MenuStyle
+from flet_core.menu_item_button import MenuItemButton
 from flet_core.navigation_bar import (
     NavigationBar,
     NavigationBarLabelBehavior,
@@ -181,6 +180,7 @@
 from flet_core.slider import Slider
 from flet_core.snack_bar import DismissDirection, SnackBar, SnackBarBehavior
 from flet_core.stack import Stack
+from flet_core.submenu_button import SubmenuButton
 from flet_core.switch import Switch
 from flet_core.tabs import Tab, Tabs
 from flet_core.template_route import TemplateRoute

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

@@ -1,9 +1,11 @@
 from typing import Any, Optional, Dict, Union
 
 from flet_core.constrained_control import ConstrainedControl
-from flet_core.snack_bar import DismissDirection
 from flet_core.control import Control, OptionalNumber
+from flet_core.control_event import ControlEvent
+from flet_core.event_handler import EventHandler
 from flet_core.ref import Ref
+from flet_core.snack_bar import DismissDirection
 from flet_core.types import (
     ResponsiveNumber,
     ScaleValue,
@@ -100,6 +102,9 @@ def __init__(
             data=data,
         )
 
+        self.__on_dismiss = EventHandler(lambda e: DismissibleDismissEvent(e.data))
+        self._add_event_handler("dismiss", self.__on_dismiss.get_handler())
+
         self.content = content
         self.background = background
         self.secondary_background = secondary_background
@@ -213,11 +218,12 @@ def dismiss_thresholds(
     # on_dismiss
     @property
     def on_dismiss(self):
-        return self._get_event_handler("action")
+        return self._get_event_handler("dismiss")
 
     @on_dismiss.setter
     def on_dismiss(self, handler):
-        self._add_event_handler("dismiss", handler)
+        self.__on_dismiss.subscribe(handler)
+        self._set_attr("dismiss", True if handler is not None else None)
 
     # on_update
     @property
@@ -236,3 +242,8 @@ def on_resize(self):
     @on_resize.setter
     def on_resize(self, handler):
         self._add_event_handler("resize", handler)
+
+
+class DismissibleDismissEvent(ControlEvent):
+    def __init__(self, d: str) -> None:
+        self.direction: DismissDirection = DismissDirection(d)