conductor(checkpoint): Checkpoint end of Phase 4 - UI Features & History List

src/gui_2.py

@@ -229,6 +229,7 @@ class App:
   self.show_windows.setdefault("Tier 4: QA", False)
   self.show_windows.setdefault('External Tools', False)
   self.show_windows.setdefault('Shader Editor', False)
+  self.show_windows.setdefault('Undo/Redo History', False)
   self.ui_multi_viewport = gui_cfg.get("multi_viewport", False)
   self.layout_presets = self.config.get("layout_presets", {})
   self._new_preset_name = ""
@@ -357,6 +358,14 @@ class App:
    sys.stderr.flush()
    self._apply_snapshot(entry.state)
 
+ def _handle_jump_to_history(self, index: int) -> None:
+  sys.stderr.write(f"[DEBUG History] Jumping to index {index}\n")
+  sys.stderr.flush()
+  current = self._take_snapshot()
+  entry = self.history.jump_to_undo(index, current, "Before Jump")
+  if entry:
+   self._apply_snapshot(entry.state)
+
  def _handle_redo(self) -> None:
   sys.stderr.write(f"[DEBUG History] _handle_redo called. can_redo={self.history.can_redo}\n")
   sys.stderr.flush()
@@ -654,9 +663,43 @@ class App:
     changed_bloom, self.shader_uniforms['bloom'] = imgui.slider_float('Bloom Threshold', self.shader_uniforms['bloom'], 0.0, 1.0)
    imgui.end()
 
+ def _render_history_window(self) -> None:
+  if not self.show_windows.get('Undo/Redo History', False):
+   return
+  
+  exp, opened = imgui.begin("Undo/Redo History", self.show_windows['Undo/Redo History'])
+  self.show_windows['Undo/Redo History'] = bool(opened)
+  if exp:
+   if imgui.button("Undo") and self.history.can_undo:
+    self._handle_undo()
+   imgui.same_line()
+   if imgui.button("Redo") and self.history.can_redo:
+    self._handle_redo()
+   
+   imgui.separator()
+   imgui.begin_child("history_list", imgui.ImVec2(0, 0), True)
+   history = self.history.get_history()
+   if not history:
+    imgui.text("No history available.")
+   else:
+    for i, entry in enumerate(reversed(history)):
+     # Actual index in undo stack
+     actual_idx = len(history) - 1 - i
+     desc = entry.get("description", "UI Change")
+     ts = entry.get("timestamp", 0.0)
+     import datetime
+     ts_str = datetime.datetime.fromtimestamp(ts).strftime("%H:%M:%S")
+     
+     label = f"[{ts_str}] {desc}##{actual_idx}"
+     if imgui.selectable(label)[0]:
+      self._handle_jump_to_history(actual_idx)
+   imgui.end_child()
+  imgui.end()
+
  def _gui_func(self) -> None:
   self._render_custom_title_bar()
   self._render_shader_live_editor()
+  self._render_history_window()
   pushed_prior_tint = False
   # Render background shader
   bg = bg_shader.get_bg()