Basics

addons/pvzadventure/scripts/AdventureEditor.cs

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+using Godot;
+
+[Tool]
+public partial class AdventureEditor : MarginContainer
+{
+	public AdventureLevelResource editedResource;
+	public string editedPath;
+
+	public void Reload()
+	{
+		editedResource = ResourceLoader.Load<AdventureLevelResource>(editedPath);
+	}
+
+	public void Save()
+	{
+		ResourceSaver.Save(editedResource, editedPath);
+	}
+}

addons/pvzadventure/scripts/AdventureEditor.cs.uid

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+uid://dkgxtig5fwdgi

addons/pvzadventure/scripts/FileButton.cs

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+using Godot;
+
+[Tool]
+public partial class FileButton : MenuButton
+{
+	const int NEWFILE = 0;
+	const int SAVEFILE = 1;
+	const int OPENFILE = 2;
+	private AdventureEditor editor;
+	private FileDialog dialog;
+	private int chosenOption = -1;
+	public override void _Ready()
+	{
+		editor = (AdventureEditor)FindParent("AdventureEditor");
+		dialog = GetNode<FileDialog>("FileDialog");
+
+		GetPopup().IndexPressed += OnIndexPressed;
+		dialog.FileSelected += OnFileSelected;
+	}
+
+	private void OnIndexPressed(long index)
+	{
+		chosenOption = (int)index;
+		if (index == NEWFILE)
+		{
+			editor.editedResource = new AdventureLevelResource();
+			dialog.PopupCentered();
+			dialog.FileMode = FileDialog.FileModeEnum.SaveFile;
+		}
+		else if (index == SAVEFILE)
+		{
+			editor.Save();
+		}
+		else if (index == OPENFILE)
+		{
+			dialog.PopupCentered();
+			dialog.FileMode = FileDialog.FileModeEnum.OpenFile;
+		}
+	}
+	private void OnFileSelected(string path)
+	{
+		editor.editedPath = path;
+		if (chosenOption == NEWFILE)
+		{
+			editor.Save();
+		}
+		else if (chosenOption == OPENFILE)
+		{
+			editor.Reload();
+		}
+	}
+
+}

addons/pvzadventure/scripts/FileButton.cs.uid

@@ -0,0 +1 @@
+uid://binuuattefn7d