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#!/usr/bin/env python3
# Import necessary libraries.
import sys
import gi
# This line is crucial for working with PyGObject.
# It ensures we are using the correct versions of the libraries.
gi.require_version("Gtk", "4.0")
gi.require_version("Adw", "1")
from gi.repository import Gtk, Adw, GObject, Gio
# Define a custom GObject to hold our data. This is the modern,
# idiomatic way to handle list models in GTK4.
class DataItem(GObject.Object):
def __init__(self, name, category, value):
super().__init__()
self.name = name
self.category = category
self.value = value
# Define GObject properties for the data.
@GObject.Property(type=str)
def name(self):
return self._name
@name.setter
def name(self, value):
self._name = value
@GObject.Property(type=str)
def category(self):
return self._category
@category.setter
def category(self, value):
self._category = value
@GObject.Property(type=int)
def value(self):
return self._value
@value.setter
def value(self, value):
self._value = value
# Define the main application class.
# It inherits from Adw.Application, which provides a modern application shell.
class MyApp(Adw.Application):
def __init__(self, **kwargs):
# Call the parent class's constructor.
# Set the application ID, which is a unique identifier.
super().__init__(application_id="com.example.SidebarApp", **kwargs)
self.connect("activate", self.on_activate)
def on_activate(self, app):
"""
This method is called when the application is activated.
It's the main entry point for setting up the UI.
"""
# Changed to Adw.ViewStack for compatibility with Adw.ViewSwitcher.
self.content_stack = Adw.ViewStack()
# Gtk.StackSidebar is not compatible with Adw.ViewStack, so it has been removed.
# self.sidebar = Gtk.StackSidebar()
# self.sidebar.set_stack(self.content_stack)
# Create a new Adw.NavigationPage to act as the container for the sidebar.
# This page will now be empty.
sidebar_page = Adw.NavigationPage.new(Gtk.Box(), "Navigation")
# Create a main navigation view.
self.nav_view = Adw.NavigationSplitView(vexpand=True)
self.nav_view.set_sidebar(sidebar_page)
# The content also needs to be wrapped in an Adw.NavigationPage.
content_page = Adw.NavigationPage.new(self.content_stack, "Content")
self.nav_view.set_content(content_page)
# Create the widgets for the new dropdown section.
# FIX: Moved this code block to make the widgets available for the home_box.
device_label = Gtk.Label(label="Available Device(s):")
# Use Gtk.StringList for the dropdown's model with sample data.
device_model = Gtk.StringList.new(["Device 1", "Device 2", "Device 3"])
device_dropdown = Gtk.DropDown.new(device_model, None)
# Create a Gtk.Box to hold the device selection widgets.
device_selection_box = Gtk.Box(
orientation=Gtk.Orientation.HORIZONTAL,
spacing=10,
margin_start=10,
margin_end=10
)
device_selection_box.append(device_label)
device_selection_box.append(device_dropdown)
# Add all pages to the Adw.ViewStack.
home_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
spacing=10,
vexpand=True
)
# FIX: Appended the device selection box to the home_box.
home_box.append(device_selection_box)
home_label = Gtk.Label(label="Welcome to the Home Page!", halign=Gtk.Align.CENTER, valign=Gtk.Align.CENTER)
home_button = Gtk.Button(label="Go to Settings", icon_name="open-menu-symbolic", halign=Gtk.Align.CENTER)
home_box.append(home_label)
home_box.append(home_button)
# Using Adw.ViewStack.add_titled_with_icon to add pages for the view switcher.
self.content_stack.add_titled_with_icon(home_box, "home", "Home", "go-home-symbolic")
settings_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
halign=Gtk.Align.CENTER,
valign=Gtk.Align.CENTER,
spacing=10,
vexpand=True
)
settings_label = Gtk.Label(label="This is the Settings Page.")
settings_box.append(settings_label)
self.content_stack.add_titled_with_icon(settings_box, "settings", "Settings", "preferences-system-symbolic")
info_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
halign=Gtk.Align.CENTER,
valign=Gtk.Align.CENTER,
spacing=10,
vexpand=True
)
info_label = Gtk.Label(label="This is the Info Page.")
info_box.append(info_label)
self.content_stack.add_titled_with_icon(info_box, "info", "Info", "dialog-information-symbolic")
logs_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
halign=Gtk.Align.CENTER,
valign=Gtk.Align.CENTER,
spacing=10,
vexpand=True
)
logs_label = Gtk.Label(label="This is the Logs Page.")
logs_box.append(logs_label)
self.content_stack.add_titled_with_icon(logs_box, "logs", "Logs", "document-symbolic")
# Create a new page with a Gtk.ColumnView.
data_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
vexpand=True,
hexpand=True,
spacing=10,
margin_top=10,
margin_bottom=10
)
# Create the search entry.
self.search_entry = Gtk.SearchEntry(
placeholder_text="Search data...",
margin_start=10,
margin_end=10
)
# FIX: Use a Gio.ListStore with the custom DataItem type.
data_model = Gio.ListStore.new(item_type=DataItem)
# Add some dummy data to the store.
data_model.append(DataItem("Item 1", "Category A", 100))
data_model.append(DataItem("Item 2", "Category B", 250))
data_model.append(DataItem("Item 3", "Category A", 50))
data_model.append(DataItem("Item 4", "Category C", 320))
data_model.append(DataItem("Item 5", "Category B", 150))
# FIX: The filter is now a method of the class, passed directly to Gtk.CustomFilter.
search_filter = Gtk.CustomFilter.new(lambda item: self.filter_func(item, self.search_entry.get_text()))
# Create a FilterListModel from the data model and the filter.
filtered_model = Gtk.FilterListModel.new(data_model, search_filter)
# Connect the search entry to the filter.
# FIX: Remove the 'None' argument as Gtk.Filter.changed() does not accept it.
self.search_entry.connect("search-changed", lambda entry: search_filter.changed())
# Create factories for each column to display the correct property.
name_factory = Gtk.SignalListItemFactory()
def name_setup(factory, list_item):
list_item.set_child(Gtk.Label())
def name_bind(factory, list_item):
label = list_item.get_child()
data_item = list_item.get_item()
if data_item:
label.set_label(data_item.name)
name_factory.connect("setup", name_setup)
name_factory.connect("bind", name_bind)
category_factory = Gtk.SignalListItemFactory()
def category_setup(factory, list_item):
list_item.set_child(Gtk.Label())
def category_bind(factory, list_item):
label = list_item.get_child()
data_item = list_item.get_item()
if data_item:
label.set_label(data_item.category)
category_factory.connect("setup", category_setup)
category_factory.connect("bind", category_bind)
value_factory = Gtk.SignalListItemFactory()
def value_setup(factory, list_item):
list_item.set_child(Gtk.Label())
def value_bind(factory, list_item):
label = list_item.get_child()
data_item = list_item.get_item()
if data_item:
label.set_label(str(data_item.value))
value_factory.connect("setup", value_setup)
value_factory.connect("bind", value_bind)
# Use the filtered model for the column view.
column_view = Gtk.ColumnView.new(Gtk.SingleSelection.new(filtered_model))
column_view.set_vexpand(True)
column_view.set_hexpand(True)
name_column = Gtk.ColumnViewColumn.new("Name", name_factory)
category_column = Gtk.ColumnViewColumn.new("Category", category_factory)
value_column = Gtk.ColumnViewColumn.new("Value", value_factory)
column_view.append_column(name_column)
column_view.append_column(category_column)
column_view.append_column(value_column)
# Add a ScrolledWindow to the column view for scrolling.
scrolled_window = Gtk.ScrolledWindow()
scrolled_window.set_child(column_view)
data_box.append(self.search_entry)
data_box.append(scrolled_window)
self.content_stack.add_titled_with_icon(data_box, "data", "Data", "document-edit-symbolic")
# Create the new view switcher and its container box.
view_switcher = Adw.ViewSwitcher(stack=self.content_stack, halign=Gtk.Align.CENTER)
view_switcher_box = Gtk.Box(
orientation=Gtk.Orientation.HORIZONTAL,
halign=Gtk.Align.CENTER,
margin_top=10,
margin_bottom=10
)
view_switcher_box.append(view_switcher)
# Create a top-level box to hold the new dropdown and the navigation view.
main_window_box = Gtk.Box(
orientation=Gtk.Orientation.VERTICAL,
vexpand=True,
hexpand=True
)
main_window_box.append(view_switcher_box)
# The device_selection_box is no longer appended here.
main_window_box.append(self.nav_view)
# Create the main application window.
self.win = Adw.ApplicationWindow(application=app)
self.win.set_default_size(800, 600) # Set a default size for the window.
self.win.set_content(main_window_box) # Set the top-level box as the content.
def filter_func(self, item, search_text):
"""
The callback function used by the Gtk.CustomFilter.
Returns True if the item should be displayed, False otherwise.
"""
# FIX: Check for item being None before accessing its properties.
if item is None:
return False
if not search_text:
return True
search_text_lower = search_text.lower()
# Check if the search text is in any of the item's properties.
if search_text_lower in item.name.lower():
return True
if search_text_lower in item.category.lower():
return True
# Convert the integer value to a string for comparison.
if search_text_lower in str(item.value).lower():
return True
return False
# Run the application.
if __name__ == "__main__":
app = MyApp()
app.run(sys.argv)
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