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https://github.com/Apress/foundations-of-pygtk-development.git
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66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
#!/usr/bin/python3
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import sys
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import gi
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk
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import os
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from pathlib import Path
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class AppWindow(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_border_width(10)
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adj1 = Gtk.Adjustment.new(0.5, 0.0, 1.0, 0.01, 0.02, 0.02)
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adj2 = Gtk.Adjustment.new(0.5, 0.0, 1.02, 0.01, 0.02, 0.02)
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spin = Gtk.SpinButton.new(adj1, 0.01, 2)
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scale = Gtk.Scale.new(Gtk.Orientation.HORIZONTAL, adj2)
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check = Gtk.CheckButton.new_with_label("Synchronize Spin and Scale")
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check.set_active(True)
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scale.set_digits(2)
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scale.set_value_pos(Gtk.PositionType.RIGHT)
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spin.connect("value_changed", self.on_spin_value_changed, spin, scale, check)
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scale.connect("value_changed", self.on_scale_value_changed, spin, scale, check)
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vbox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 5);
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vbox.pack_start(spin, False, True, 0)
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vbox.pack_start(scale, False, True, 0);
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vbox.pack_start(check, False, True, 0);
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self.add(vbox)
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def on_spin_value_changed(self, widget, spin, scale, check):
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val1 = spin.get_value()
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val2 = scale.get_value()
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if (check.get_active() and val1 != val2):
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if isinstance(widget, Gtk.SpinButton):
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scale.set_value(val1)
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else:
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spin.set_value(val2)
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class Application(Gtk.Application):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, application_id="org.example.myapp",
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**kwargs)
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self.window = None
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def do_activate(self):
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if not self.window:
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self.window = AppWindow(application=self, title="Exercise 2")
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self.window.show_all()
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self.window.present()
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if __name__ == "__main__":
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app = Application()
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app.run(sys.argv)
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