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https://github.com/Taiko2k/GTK4PythonTutorial.git
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add part 2 wip
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79
README.md
79
README.md
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# Bitchin GTK4 Python tutorial
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# Taiko's GTK4 Python tutorial
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Wanna make apps for Linux but not sure how to start with GTK? Frustrated with the style of GTK4 documentation. This guide will hopefully get you started!
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@@ -68,7 +68,7 @@ app.run(sys.argv)
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Soo we have an instance of an app class and a window which we extend! We run our app and it makes a window!
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Dont worry too much if your Python knowledge isn't strong and the `__init__(self, *args, **kwargs)` stuff is giving you a headache.
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> **Tip:** Don't worry too much if your Python knowledge isn't strong and the `__init__(self, *args, **kwargs)` stuff is giving you a headache.
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### So! Whats next?
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@@ -86,7 +86,7 @@ self.set_child(self.box)
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We make a new box, and attach it to the window. Simple. If you run the app now you'll see no difference, because there's nothing in the layout yet either.
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### Add a button!
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## Add a button!
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One of the most basic widgets is a [Button](https://docs.gtk.org/gtk4/class.Button.html). Let's make one and add it to the layout.
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@@ -133,7 +133,7 @@ self.set_title("MyApp")
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## More boxes
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You'll notice our button is stenched with the window. Let's add two boxes inside that first box we made.
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You'll notice our button is stretched with the window. Let's add two boxes inside that first box we made.
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```python
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self.box1 = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
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@@ -212,6 +212,77 @@ It should look like this now:
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The file `part1.py` is an example of the code so far.
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## Adding a slider (Aka scale)
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Here's an example of adding a [Scale](https://docs.gtk.org/gtk4/ctor.Scale.new.html) with a range from 0 - 10
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```python
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self.slider = Gtk.Scale()
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self.slider.set_digits(0) # Number of decimal places to use
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self.slider.set_range(0, 10)
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self.slider.set_draw_value(True) # Show a label with current value
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self.slider.set_value(5) # Sets the current value/position
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self.slider.connect('value-changed', self.slider_changed)
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self.box2.append(self.slider)
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def slider_changed(self, slider):
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print(int(slider.get_value()))
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```
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## Adding a button into the header bar
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First we need to make a header bar
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```python
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self.header = Gtk.HeaderBar()
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self.set_titlebar(self.header)
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```
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Simple.
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Now add a button
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```python
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self.open_button = Gtk.Button(label="Open")
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self.header.pack_start(self.open_button)
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```
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We already know how to connect a function to the button, so i've omitted that.
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Done! But... it would look nicer with an icon rather than text.
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```python
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self.open_button.set_icon_name("document-open-symbolic")
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```
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This will be an icon name from the icon theme.
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For some defaults you can take a look at `/usr/share/icons/Adwaita/scalable/actions`.
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If you were adding a new action icon it would go in `/usr/share/icons/hicolor/scalable/actions`
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> **Help! Todo!** Is this the best way? How do icons work in a development environment?
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# Adding a button with menu
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First, lets add a ***MenuButton*** to our header bar
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```python
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self.hamburger = Gtk.MenuButton()
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self.header.pack_start(self.hamburger)
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```
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WIP
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## Todo...
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Text box: [Entry](https://docs.gtk.org/gtk4/class.Entry.html)
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Number changer: [SpinButton](https://docs.gtk.org/gtk4/class.SpinButton.html)
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90
part2.py
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90
part2.py
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import sys
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import gi
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gi.require_version('Gtk', '4.0')
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gi.require_version('Adw', '1')
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from gi.repository import Gtk, Adw
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class MainWindow(Gtk.ApplicationWindow):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.set_default_size(600, 250)
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self.set_title("MyApp")
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# Main layout containers
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self.box1 = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
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self.box2 = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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self.box3 = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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self.set_child(self.box1) # Horizontal box to window
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self.box1.append(self.box2) # Put vert box in that box
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self.box1.append(self.box3) # And another one, empty for now
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# Add a button
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self.button = Gtk.Button(label="Hello")
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self.button.connect('clicked', self.hello)
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self.box2.append(self.button) # But button in the first of the two vertical boxes
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# Add a check button
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self.check = Gtk.CheckButton(label="And goodbye?")
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self.box2.append(self.check)
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# Add a box containing a switch and label
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self.switch_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
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self.switch_box.set_spacing(5)
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self.switch = Gtk.Switch()
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self.switch.set_active(True) # Let's default it to on
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self.switch.connect("state-set", self.switch_switched) # Lets trigger a function on state change
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self.label = Gtk.Label(label="A switch")
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self.switch_box.append(self.switch)
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self.switch_box.append(self.label)
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self.box2.append(self.switch_box)
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self.slider = Gtk.Scale()
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self.slider.set_digits(0) # Number of decimal places to use
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self.slider.set_range(0, 10)
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self.slider.set_draw_value(True) # Show a label with current value
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self.slider.set_value(5) # Sets the current value/position
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self.slider.connect('value-changed', self.slider_changed)
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self.box2.append(self.slider)
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self.header = Gtk.HeaderBar()
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self.set_titlebar(self.header)
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self.open_button = Gtk.Button(label="Open")
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self.header.pack_start(self.open_button)
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self.open_button.set_icon_name("document-open-symbolic")
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self.hamburger = Gtk.MenuButton()
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self.header.pack_start(self.hamburger)
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def slider_changed(self, slider):
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print(int(slider.get_value()))
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def switch_switched(self, switch, state):
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print(f"The switch has been switched {'on' if state else 'off'}")
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def hello(self, button):
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print("Hello world")
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if self.check.get_active():
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print("Goodbye world!")
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self.close()
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class MyApp(Adw.Application):
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.connect('activate', self.on_activate)
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def on_activate(self, app):
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self.win = MainWindow(application=app)
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self.win.present()
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app = MyApp(application_id="com.example.GtkApplication")
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app.run(sys.argv)
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