windowTitle: Add custom window title widget

Fixes #202

src/widgets/mod.rs

@@ -25,6 +25,7 @@ mod print;
 mod print_preview;
 mod properties_view;
 mod sliding_view;
+mod window_title;
 
 pub use drag_overlay::LpDragOverlay;
 pub use image::LpImage;
@@ -34,3 +35,4 @@ pub use print::LpPrint;
 pub use print_preview::LpPrintPreview;
 pub use properties_view::LpPropertiesView;
 pub use sliding_view::LpSlidingView;
+pub use window_title::LpWindowTitle;

src/widgets/window_title.rs

@@ -0,0 +1,97 @@
+// Copyright (c) 2023 Sophie Herold
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+//! A window title
+//!
+//! This window title does not claim its complete width as natural width. This
+//! avoids the window to grow to a large file name title instead of just
+//! fittingly for the image size.
+
+use adw::prelude::*;
+use adw::subclass::prelude::*;
+
+use crate::deps::*;
+
+mod imp {
+    use super::*;
+
+    #[derive(Debug, Default, glib::Properties)]
+    #[properties(wrapper_type = super::LpWindowTitle)]
+    pub struct LpWindowTitle {
+        #[property(type = String, set = Self::set_title)]
+        _title: (),
+        window_title: adw::WindowTitle,
+    }
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for LpWindowTitle {
+        const NAME: &'static str = "LpWindowTitle";
+        type Type = super::LpWindowTitle;
+        type ParentType = adw::Bin;
+    }
+
+    impl ObjectImpl for LpWindowTitle {
+        fn constructed(&self) {
+            self.parent_constructed();
+            let obj = self.obj();
+
+            obj.set_layout_manager(None::<gtk::LayoutManager>);
+            obj.set_child(Some(&self.window_title));
+            obj.set_hexpand(true);
+        }
+
+        fn properties() -> &'static [glib::ParamSpec] {
+            Self::derived_properties()
+        }
+
+        fn set_property(&self, id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
+            self.derived_set_property(id, value, pspec)
+        }
+
+        fn property(&self, id: usize, pspec: &glib::ParamSpec) -> glib::Value {
+            self.derived_property(id, pspec)
+        }
+    }
+    impl WidgetImpl for LpWindowTitle {
+        fn measure(&self, orientation: gtk::Orientation, for_size: i32) -> (i32, i32, i32, i32) {
+            let mut measure = self.window_title.measure(orientation, for_size);
+
+            if orientation == gtk::Orientation::Horizontal {
+                // Set natural size to minimal size
+                measure.1 = measure.0;
+            }
+
+            measure
+        }
+
+        fn size_allocate(&self, width: i32, height: i32, baseline: i32) {
+            self.window_title.allocate(width, height, baseline, None);
+        }
+    }
+    impl BinImpl for LpWindowTitle {}
+
+    impl LpWindowTitle {
+        fn set_title(&self, title: String) {
+            self.window_title.set_title(&title);
+        }
+    }
+}
+
+glib::wrapper! {
+    pub struct LpWindowTitle(ObjectSubclass<imp::LpWindowTitle>)
+        @extends gtk::Widget, adw::Bin;
+}

src/window.rs

@@ -52,6 +52,7 @@ const HIDE_CONTROLS_IDLE_TIMEOUT: u64 = 3000;
 
 mod imp {
     use super::*;
+    use crate::widgets::LpWindowTitle;
 
     // To use composite templates, you need
     // to use derive macro. Derive macros generate
@@ -78,6 +79,8 @@ mod imp {
         #[template_child]
         pub(super) headerbar: TemplateChild<adw::HeaderBar>,
         #[template_child]
+        pub(super) title: TemplateChild<LpWindowTitle>,
+        #[template_child]
         pub(super) headerbar_events: TemplateChild<gtk::EventControllerMotion>,
         #[template_child]
         pub(super) properties_button: TemplateChild<gtk::ToggleButton>,

src/window.ui

@@ -61,7 +61,6 @@
     <property name="default-height">498</property>
     <property name="width-request">360</property>
     <property name="height-request">360</property>
-    <property name="title" translatable="yes">Image Viewer</property>
     <child>
       <object class="AdwBreakpoint">
         <condition>max-width: 590sp</condition>
@@ -74,6 +73,11 @@
           <object class="AdwHeaderBar" id="headerbar">
             <property name="show-end-title-buttons" bind-source="LpWindow" bind-property="fullscreened" bind-flags="sync-create|invert-boolean" />
             <property name="show-start-title-buttons" bind-source="LpWindow" bind-property="fullscreened" bind-flags="sync-create|invert-boolean" />
+            <property name="title-widget">
+              <object class="LpWindowTitle" id="title">
+                <property name="title" bind-source="LpWindow" bind-property="title" />
+              </object>
+            </property>
             <style>
               <class name="fullscreen-osd" />
             </style>