added stack example

handy/4-stack.py

@@ -0,0 +1,79 @@
+selamun = "aleyküm"
+
+import gi, os
+gi.require_version("Gtk", "3.0")
+gi.require_version("Handy", "1")
+from gi.repository import Gtk, Handy
+
+Handy.init()
+
+class MyWindow(Handy.Window):
+    def __init__(self):
+        super().__init__(title="Hello World")
+        self.set_default_size(500, 300)
+
+        # WindowHandle
+        self.handle = Handy.WindowHandle()
+        self.add(self.handle)
+
+        # Box
+        self.winbox = Gtk.Box(spacing=6, orientation=Gtk.Orientation.VERTICAL)
+        self.handle.add(self.winbox)
+
+        # Headerbar
+        self.hb = Handy.HeaderBar()
+        self.hb.set_show_close_button(True)
+        self.hb.props.title = "Stack Example"
+        self.winbox.pack_start(self.hb, False, True, 0)
+
+        # Stack
+        self.stack = Gtk.Stack()
+        self.stack.set_transition_type(Gtk.StackTransitionType.SLIDE_LEFT_RIGHT)
+        self.winbox.pack_start(self.stack, True, True, 0)
+
+        # Labels
+        self.label = Gtk.Label(label="Page 1")
+        self.stack.add_titled(self.label, "page0", "Label")
+
+        self.label = Gtk.Label(label="Page 2")
+        self.stack.add_titled(self.label, "page1", "Label")
+
+        self.label = Gtk.Label(label="Page 3")
+        self.stack.add_titled(self.label, "page2", "Label")
+        
+        self.label = Gtk.Label(label="Page 4")
+        self.stack.add_titled(self.label, "page3", "Label")
+
+        self.label = Gtk.Label(label="Page 5")
+        self.stack.add_titled(self.label, "page4", "Label")
+
+        # Headerbar button 1
+        self.button = Gtk.Button()
+        self.button = Gtk.Button.new_from_icon_name("pan-start-symbolic", Gtk.IconSize.MENU)
+        self.hb.pack_start(self.button)
+        self.button.connect('clicked', self.on_button1_clicked)
+
+        # Headerbar button 2
+        self.button2 = Gtk.Button()
+        self.button2 = Gtk.Button.new_from_icon_name("pan-end-symbolic", Gtk.IconSize.MENU)
+        self.hb.pack_start(self.button2)
+        self.button2.connect("clicked", self.on_button2_clicked)
+
+    def on_button1_clicked(self, widget):
+        pages = self.stack.get_children()
+        cur_page = self.stack.get_visible_child()
+        i = pages.index(cur_page)
+        if i == 0: return
+        self.stack.set_visible_child(pages[i-1])
+
+    def on_button2_clicked(self, widget):
+        pages = self.stack.get_children()
+        cur_page = self.stack.get_visible_child()
+        i = pages.index(cur_page)
+        if i == len(pages) - 1: return
+        self.stack.set_visible_child(pages[i+1])
+
+win = MyWindow()
+win.connect("destroy", Gtk.main_quit)
+win.show_all()
+Gtk.main()