From 49e595cda2109b91397e298f4b89bd09e946667e Mon Sep 17 00:00:00 2001
From: Sophie Herold <sophie@hemio.de>
Date: Thu, 10 Nov 2022 20:03:12 +0100
Subject: [PATCH] image: Support rotate gesture

---
 src/widgets/image.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/widgets/image.rs b/src/widgets/image.rs
index 95863a5..caf1ecd 100644
--- a/src/widgets/image.rs
+++ b/src/widgets/image.rs
@@ -98,6 +98,18 @@ mod imp {
                 .target(&adw::PropertyAnimationTarget::new(&*obj, "rotation"))
                 .build();
             self.rotation_animation.replace(Some(rotation_animation));
+
+            let rotation_gesture = gtk::GestureRotate::new();
+            obj.add_controller(&rotation_gesture);
+
+            rotation_gesture.connect_angle_changed(glib::clone!(@weak obj => move |_, angle, _| {
+                obj.set_rotation(obj.imp().rotation_target.get() + angle.to_degrees());
+            }));
+
+            rotation_gesture.connect_end(glib::clone!(@weak obj => move |_, _| {
+                let angle = (obj.rotation() / 90.).round() * 90. - obj.imp().rotation_target.get();
+                obj.rotate(angle);
+            }));
         }
 
         fn dispose(&self) {