initial classes to help support creating layers for toggling visibility on the canvas for associated items

daemon/core/gui/dialogs/layers.py

@@ -0,0 +1,60 @@
+import tkinter as tk
+from tkinter import messagebox, ttk
+from typing import TYPE_CHECKING, Optional
+
+from core.gui.dialogs.dialog import Dialog
+from core.gui.dialogs.simple import SimpleStringDialog
+from core.gui.themes import PADX, PADY
+from core.gui.widgets import ListboxScroll
+
+if TYPE_CHECKING:
+    from core.gui.app import Application
+
+
+class LayersDialog(Dialog):
+    def __init__(self, app: "Application") -> None:
+        super().__init__(app, "Canvas Layers", modal=False)
+        self.list: Optional[ListboxScroll] = None
+        self.draw()
+
+    def draw(self) -> None:
+        self.top.columnconfigure(0, weight=1)
+        self.list = ListboxScroll(self.top)
+        self.list.grid(sticky=tk.EW, pady=PADY)
+        for name in self.app.canvas.layers.names():
+            self.list.listbox.insert(tk.END, name)
+        frame = ttk.Frame(self.top)
+        frame.grid(sticky=tk.EW)
+        for i in range(3):
+            frame.columnconfigure(i, weight=1)
+        button = ttk.Button(frame, text="Add", command=self.click_add)
+        button.grid(row=0, column=0, sticky=tk.EW, padx=PADX)
+        button = ttk.Button(frame, text="Delete", command=self.click_delete)
+        button.grid(row=0, column=1, sticky=tk.EW, padx=PADX)
+        button = ttk.Button(frame, text="Toggle", command=self.click_toggle)
+        button.grid(row=0, column=2, sticky=tk.EW)
+
+    def click_add(self):
+        name = SimpleStringDialog(self, self.app, "Add Layer", "Layer Name").ask()
+        if name:
+            result = self.app.canvas.layers.add_layer(name)
+            if result:
+                self.list.listbox.insert(tk.END, name)
+            else:
+                messagebox.showerror(
+                    "Add Layer", f"Duplicate Layer: {name}", parent=self
+                )
+
+    def click_delete(self):
+        selection = self.list.listbox.curselection()
+        if not selection:
+            return
+        name = self.list.listbox.get(selection)
+        print(name)
+
+    def click_toggle(self):
+        selection = self.list.listbox.curselection()
+        if not selection:
+            return
+        name = self.list.listbox.get(selection)
+        print(name)