Initial commit

Basic_Widgets/Exercise_2.py

@@ -0,0 +1,65 @@
+#!/usr/bin/python3
+
+import sys
+import gi
+gi.require_version('Gtk', '3.0')
+from gi.repository import Gtk
+import os
+from pathlib import Path
+
+class AppWindow(Gtk.ApplicationWindow):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.set_border_width(10)
+
+        adj1 = Gtk.Adjustment.new(0.5, 0.0, 1.0, 0.01, 0.02, 0.02)
+        adj2 = Gtk.Adjustment.new(0.5, 0.0, 1.02, 0.01, 0.02, 0.02)
+
+        spin = Gtk.SpinButton.new(adj1, 0.01, 2)
+        scale = Gtk.Scale.new(Gtk.Orientation.HORIZONTAL, adj2)
+        check = Gtk.CheckButton.new_with_label("Synchronize Spin and Scale")
+
+        check.set_active(True)
+        scale.set_digits(2)
+        scale.set_value_pos(Gtk.PositionType.RIGHT)
+
+        spin.connect("value_changed", self.on_spin_value_changed, spin, scale, check)
+        scale.connect("value_changed", self.on_scale_value_changed, spin, scale, check)
+
+        vbox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 5);
+        vbox.pack_start(spin, False, True, 0)
+        vbox.pack_start(scale, False, True, 0);
+        vbox.pack_start(check, False, True, 0);
+
+        self.add(vbox)
+
+
+    def on_spin_value_changed(self, widget, spin, scale, check):
+        val1 = spin.get_value()
+        val2 = scale.get_value()
+
+        if (check.get_active() and val1 != val2):
+            if isinstance(widget, Gtk.SpinButton):
+                scale.set_value(val1)
+            else:
+                spin.set_value(val2)
+
+
+
+class Application(Gtk.Application):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, application_id="org.example.myapp",
+                         **kwargs)
+        self.window = None
+
+    def do_activate(self):
+        if not self.window:
+            self.window = AppWindow(application=self, title="Exercise 2")
+        self.window.show_all()
+        self.window.present()
+
+if __name__ == "__main__":
+    app = Application()
+    app.run(sys.argv)