Library: Port 'Revealer' to Python (#748)

Co-authored-by: Marco Capypara Köpcke <[email protected]>

Author: 2 people

src/Library/demos/Revealer/main.py

@@ -0,0 +1,30 @@
+from gi.repository import Gio
+import workbench
+
+button_slide = workbench.builder.get_object("button_slide")
+button_crossfade = workbench.builder.get_object("button_crossfade")
+revealer_slide = workbench.builder.get_object("revealer_slide")
+revealer_crossfade = workbench.builder.get_object("revealer_crossfade")
+image1 = workbench.builder.get_object("image1")
+image2 = workbench.builder.get_object("image2")
+
+image1.set_file(Gio.File.new_for_uri(workbench.resolve("./image1.png")))
+image2.set_file(Gio.File.new_for_uri(workbench.resolve("./image2.png")))
+
+button_slide.connect(
+    "toggled", lambda *_: revealer_slide.set_reveal_child(button_slide.get_active())
+)
+
+button_crossfade.connect(
+    "toggled",
+    lambda *_: revealer_crossfade.set_reveal_child(button_crossfade.get_active()),
+)
+
+revealer_slide.connect(
+    "notify::child-revealed",
+    lambda *_: print(
+        "Slide Revealer Shown"
+        if revealer_slide.get_child_revealed()
+        else "Slide Revealer Hidden"
+    ),
+)