Add breviously forgotten picture browsing app.

diff --git a/browser.py b/browser.py
new file mode 100755 (executable)
index 0000000..b8faa24
--- /dev/null
+++ b/browser.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+from os import scandir
+from os.path import splitext
+import gi
+gi.require_version('Gtk', '4.0')
+# pylint: disable=wrong-import-position
+from gi.repository import Gtk  # noqa: E402
+
+
+class Window(Gtk.ApplicationWindow):
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+        box_buttons = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL)
+        btn_close = Gtk.Button(label='close')
+        btn_close.connect('clicked', lambda _: self.close())
+        box_buttons.append(btn_close)
+        btn = Gtk.Button(label='oldest')
+        btn.connect('clicked', self.oldest)
+        box_buttons.append(btn)
+        btn = Gtk.Button(label='older')
+        btn.connect('clicked', self.older)
+        box_buttons.append(btn)
+        btn = Gtk.Button(label='newer')
+        btn.connect('clicked', self.newer)
+        box_buttons.append(btn)
+        btn = Gtk.Button(label='newest')
+        btn.connect('clicked', self.newest)
+        box_buttons.append(btn)
+
+        self.label_nothing = Gtk.Label(label='nothing to show')
+
+        self.box_outer = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
+        self.box_outer.append(box_buttons)
+        self.box_outer.append(self.label_nothing)
+        self.props.child = self.box_outer
+
+        self.entries = []
+        self.current_index = -1 
+        self.newest(None)
+
+    def _reload(self, set_max = False):
+        self.entries = [e for e in scandir('./empty')
+                        if e.is_file()
+                        and splitext(e)[1] in {'.png', '.jpg', '.jpeg'}]
+        self.entries.sort(key=lambda e: e.stat().st_mtime)
+        if set_max or self.current_index + 1 > len(self.entries):
+            self.current_index = len(self.entries) - 1
+        self.box_outer.remove(self.box_outer.get_last_child())
+        if self.current_index >= 0:
+            pic = Gtk.Picture.new_for_filename(self.entries[self.current_index].path)
+            self.box_outer.append(pic)
+        else:
+            self.box_outer.append(self.label_nothing)
+
+    def oldest(self, _widget):
+        self.current_index = 0
+        self._reload()
+
+    def older(self, _widget):
+        if self.current_index > 0:
+            self.current_index -= 1
+        self._reload()
+
+    def newer(self, _widget):
+        self.current_index += 1
+        self._reload()
+
+    def newest(self, _widget):
+        self._reload(set_max=True)
+
+
+def on_activate(app_):
+    win = Window(application=app_)
+    win.present()
+
+
+app = Gtk.Application(application_id='plomlompom.com.StablePixBrowser.App')
+app.connect('activate', on_activate)
+app.run(None)