file_dialogs.kv

#:kivy 1.1.0
#: import os os
#: import sys sys
#filename editor.kv
<LoadDialog>:
	BoxLayout:
		size: root.size
		pos: root.pos
		orientation: "vertical"
		
		FileChooserListView:
			id: filechooser
			##path: os.path.abspath(os.path.dirname(sys.argv[0]))
			## The next line sets the load/save path to a safe
			## directory/folder for the OS. On Windows 10, it
			## automatically creates a folder in
			## <user>\AppData\Roaming\ named for the application.
			## It gets the name by removing the 'App' suffix from
			## whatever the app is named and converting the result
			## to all lowercase. In this instance, this folder is
			## named '<user>\AppData\Roaming\editor'
			path: app.user_data_dir
			filters: ['*.csv']
			
		BoxLayout:
			size_hint_y: None
			height: 30
			
			Button:
				text: "Cancel"
				on_release: root.cancel()
				
			Button:
				text: "Load"
				
				on_release:
					print("calling load_button")
					root.load_button(filechooser.path, filechooser.selection)
	
<SaveDialog>:
	text_input: text_input
	
	BoxLayout:
		size: root.size
		pos: root.pos
		orientation: "vertical"
		
		FileChooserListView:
			id: filechooser
			filters: ['*.csv']
			path: app.user_data_dir

			on_selection:
				text_input.text = self.selection and self.selection[0] or ''

		TextInput:
			id: text_input
			size_hint_y: None
			height: 30
			multiline: False
		
		BoxLayout:
			size_hint_y: None
			height: 30
			
			Button:
				text: "Cancel"
				on_release: root.cancel_button()
				
			Button:
				text: "Save"
				
				on_release:
					root.set_pathname(filechooser.path)
					root.set_filename(text_input.text)
					root.cancel_button()
					root.save_button()