From d13acea38a58d73d70ac8a3b70401e6764147505 Mon Sep 17 00:00:00 2001
From: Sophie Herold <sophie@hemio.de>
Date: Mon, 31 Jul 2023 21:13:27 +0200
Subject: [PATCH] imageView: Deny DragSource for touchscreens

Before, the DragSource gesture was claimed on touchscreens,
while no dnd was available there anyways. This caused swiping
through images to only work unreliably.

Issue #176

Part-of: <https://gitlab.gnome.org/GNOME/loupe/-/merge_requests/264>
---
 src/widgets/image_view.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/widgets/image_view.rs b/src/widgets/image_view.rs
index 4d00478..60fb5fc 100644
--- a/src/widgets/image_view.rs
+++ b/src/widgets/image_view.rs
@@ -174,8 +174,11 @@ mod imp {
                         .current_page()
                         .map(|p| p.image().is_hscrollable() || p.image().is_vscrollable());
 
-                    // do scrolling if scrollable
-                    if is_scrollable == Some(true) {
+                    if is_scrollable == Some(true)
+                        || gesture.device().map(|x| x.source())
+                            == Some(gdk::InputSource::Touchscreen)
+                    {
+                        // Do scrolling if scrollable and no drag and drop on touchscreen
                         gesture.set_state(gtk::EventSequenceState::Denied);
                         None
                     } else {