Working on ColumnsManager. Added CycleStateControl and DataGridColumnsManager.

src/myfasthtml/controls/CycleStateControl.py

@@ -0,0 +1,52 @@
+from fasthtml.components import Div
+
+from myfasthtml.controls.BaseCommands import BaseCommands
+from myfasthtml.controls.helpers import mk
+from myfasthtml.core.commands import Command
+from myfasthtml.core.dbmanager import DbObject
+from myfasthtml.core.instances import MultipleInstance
+
+
+class CycleState(DbObject):
+  def __init__(self, owner, save_state):
+    with self.initializing():
+      super().__init__(owner, save_state=save_state)
+      self.state = None
+
+
+class Commands(BaseCommands):
+  def cycle_state(self):
+    return Command("CycleState",
+                   "Cycle state",
+                   self._owner,
+                   self._owner.cycle_state).htmx(target=f"#{self._id}")
+
+
+class CycleStateControl(MultipleInstance):
+  def __init__(self, parent, controls: dict, _id=None, save_state=True):
+    super().__init__(parent, _id)
+    self._state = CycleState(self, save_state)
+    self.controls_by_states = controls
+    self.commands = Commands(self)
+    
+    # init the state if required
+    if self._state.state is None and controls:
+      self._state.state = next(iter(controls.keys()))
+  
+  def cycle_state(self):
+    keys = list(self.controls_by_states.keys())
+    current_idx = keys.index(self._state.state)
+    self._state.state = keys[(current_idx + 1) % len(keys)]
+    return self
+  
+  def get_state(self):
+    return self._state.state
+  
+  def render(self):
+    return mk.mk(
+      Div(self.controls_by_states[self._state.state], id=self._id),
+      command=self.commands.cycle_state()
+    )
+  
+  def __ft__(self):
+    return self.render()