From 880493885991098af29d5e3178fcf8f0019bc732 Mon Sep 17 00:00:00 2001
From: Huan Nguyen <goafanxx@gmail.com>
Date: Sun, 21 May 2023 16:17:48 +0000
Subject: [PATCH] window: Support forward and back mouse buttons

The button value for forward is 9. See <GNOME/gtk#515>.

Closes #172
---
 data/gtk/window.ui | 13 ++++++++++++-
 src/window.rs      | 15 +++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/data/gtk/window.ui b/data/gtk/window.ui
index fc0f0ac..ab31a43 100644
--- a/data/gtk/window.ui
+++ b/data/gtk/window.ui
@@ -194,7 +194,18 @@
                       </object>
                     </child>
                     <child>
-                      <object class="LpImageView" id="image_view"/>
+                      <object class="LpImageView" id="image_view">
+                        <child>
+                          <object class="GtkGestureClick" id="forward_click_gesture">
+                            <property name="button">9</property>
+                          </object>
+                        </child>
+                        <child>
+                          <object class="GtkGestureClick" id="backward_click_gesture">
+                            <property name="button">8</property>
+                          </object>
+                        </child>
+                      </object>
                     </child>
                     <child>
                       <object class="GtkDropTarget" id="drop_target">
diff --git a/src/window.rs b/src/window.rs
index 90db883..de92b38 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -91,6 +91,12 @@ mod imp {
         pub(super) properties_view: TemplateChild<LpPropertiesView>,
         #[template_child]
         pub(super) drop_target: TemplateChild<gtk::DropTarget>,
+
+        #[template_child]
+        pub(super) forward_click_gesture: TemplateChild<gtk::GestureClick>,
+        #[template_child]
+        pub(super) backward_click_gesture: TemplateChild<gtk::GestureClick>,
+
         /// Motion controller for complete window
         pub(super) motion_controller: gtk::EventControllerMotion,
         pub(super) pointer_position: Cell<(f64, f64)>,
@@ -241,6 +247,15 @@ mod imp {
 
             self.parent_constructed();
 
+            self.forward_click_gesture
+                .connect_pressed(clone!(@weak obj => move |_,_,_,_| {
+                    obj.image_view().navigate(Direction::Forward);
+                }));
+            self.backward_click_gesture
+                .connect_pressed(clone!(@weak obj => move |_,_,_,_| {
+                    obj.image_view().navigate(Direction::Back);
+                }));
+
             if config::PROFILE == ".Devel" {
                 obj.add_css_class("devel");
             }