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)

daemon/core/gui/dialogs/simple.py

@@ -0,0 +1,48 @@
+import tkinter as tk
+from tkinter import ttk
+from typing import TYPE_CHECKING, Optional
+
+from core.gui.dialogs.dialog import Dialog
+from core.gui.themes import PADX, PADY
+
+if TYPE_CHECKING:
+    from core.gui.app import Application
+
+
+class SimpleStringDialog(Dialog):
+    def __init__(
+        self, master: tk.BaseWidget, app: "Application", title: str, prompt: str
+    ):
+        super().__init__(app, title, master=master)
+        self.prompt: str = prompt
+        self.value = tk.StringVar()
+        self.entry: Optional[ttk.Entry] = None
+        self.canceled = False
+        self.draw()
+
+    def draw(self) -> None:
+        self.top.columnconfigure(0, weight=1)
+        label = ttk.Label(self.top, text=self.prompt)
+        label.grid(sticky=tk.EW, pady=PADY)
+        entry = ttk.Entry(self.top, textvariable=self.value)
+        entry.grid(stick=tk.EW, pady=PADY)
+        entry.focus_set()
+        frame = ttk.Frame(self.top)
+        frame.grid(sticky=tk.EW)
+        for i in range(2):
+            frame.columnconfigure(i, weight=1)
+        button = ttk.Button(frame, text="Submit", command=self.destroy)
+        button.grid(row=0, column=0, sticky=tk.EW, padx=PADX)
+        button = ttk.Button(frame, text="Cancel", command=self.click_cancel)
+        button.grid(row=0, column=1, sticky=tk.EW)
+
+    def click_cancel(self):
+        self.canceled = True
+        self.destroy()
+
+    def ask(self) -> Optional[str]:
+        self.show()
+        if self.canceled:
+            return None
+        else:
+            return self.value.get()