Add button to zoom document to real size

crates/rnote-ui/data/meson.build

@@ -336,6 +336,7 @@ rnote_ui_gresources_icons_files = files(
     'icons/scalable/actions/zoom-fit-width-symbolic.svg',
     'icons/scalable/actions/zoom-in-symbolic.svg',
     'icons/scalable/actions/zoom-out-symbolic.svg',
+    'icons/scalable/actions/zoom-real-width-symbolic.svg',
     'icons/scalable/apps/rnote-devel.svg',
     'icons/scalable/apps/rnote.svg',
     'icons/scalable/mimetypes/application-rnote.svg',

crates/rnote-ui/data/resources.gresource.xml

@@ -206,6 +206,7 @@
         <file compressed="true">icons/scalable/actions/workspacelistentryicon-weather-symbolic.svg</file>
         <file compressed="true">icons/scalable/actions/workspacelistentryicon-weight-symbolic.svg</file>
         <file compressed="true">icons/scalable/actions/zoom-fit-width-symbolic.svg</file>
+        <file compressed="true">icons/scalable/actions/zoom-real-width-symbolic.svg</file>
         <file compressed="true">icons/scalable/actions/zoom-in-symbolic.svg</file>
         <file compressed="true">icons/scalable/actions/zoom-out-symbolic.svg</file>
         <file compressed="true">icons/scalable/apps/rnote-devel.svg</file>

crates/rnote-ui/data/ui/canvasmenu.ui

@@ -114,6 +114,14 @@
                   <property name="action-name">win.zoom-fit-width</property>
                 </object>
               </child>
+              <child>
+                <object class="GtkButton" id="zoom_real_width_button">
+                  <property name="hexpand">false</property>
+                  <property name="icon_name">zoom-real-width-symbolic</property>
+                  <property name="tooltip_text" translatable="yes">Zoom to Real Size</property>
+                  <property name="action-name">win.zoom-real-width</property>
+                </object>
+              </child>
             </object>
           </child>
           <child>

crates/rnote-ui/src/appwindow/actions.rs

@@ -10,6 +10,7 @@ use gtk4::{
 use p2d::bounding_volume::BoundingVolume;
 use rnote_compose::SplitOrder;
 use rnote_compose::penevent::ShortcutKey;
+use rnote_engine::document::format::MeasureUnit;
 use rnote_engine::engine::StrokeContent;
 use rnote_engine::ext::GraphenePointExt;
 use rnote_engine::pens::PenStyle;
@@ -68,6 +69,8 @@ impl RnAppWindow {
         self.add_action(&action_zoom_reset);
         let action_zoom_fit_width = gio::SimpleAction::new("zoom-fit-width", None);
         self.add_action(&action_zoom_fit_width);
+        let action_zoom_real_width = gio::SimpleAction::new("zoom-real-width", None);
+        self.add_action(&action_zoom_real_width);
         let action_zoomin = gio::SimpleAction::new("zoom-in", None);
         self.add_action(&action_zoomin);
         let action_zoomout = gio::SimpleAction::new("zoom-out", None);
@@ -643,6 +646,34 @@ impl RnAppWindow {
             }
         ));
 
+        // Zoom real to width
+        action_zoom_real_width.connect_activate(clone!(
+            #[weak(rename_to=appwindow)]
+            self,
+            move |_, _| {
+                let Some(wrapper) = appwindow.active_tab_wrapper() else {
+                    return;
+                };
+                let canvas = wrapper.canvas();
+                let viewport_center = canvas.engine_ref().camera.viewport_center();
+                let Some(surface) = appwindow.surface() else {
+                    return;
+                };
+                let Some(monitor) = canvas.display().monitor_at_surface(&surface) else {
+                    return;
+                };
+                let ppi = monitor.geometry().width() as f64 / monitor.width_mm() as f64
+                    * MeasureUnit::AMOUNT_MM_IN_INCH;
+                let new_zoom = ppi / wrapper.canvas().engine_ref().document.config.format.dpi();
+                let mut widget_flags = canvas.engine_mut().zoom_w_timeout(new_zoom);
+                widget_flags |= canvas
+                    .engine_mut()
+                    .camera
+                    .set_viewport_center(viewport_center);
+                appwindow.handle_widget_flags(widget_flags, &canvas)
+            }
+        ));
+
         // Zoom in
         action_zoomin.connect_activate(clone!(
             #[weak(rename_to=appwindow)]

crates/rnote-ui/src/canvasmenu.rs

@@ -27,6 +27,8 @@ mod imp {
         #[template_child]
         pub(crate) zoom_fit_width_button: TemplateChild<Button>,
         #[template_child]
+        pub(crate) zoom_real_width_button: TemplateChild<Button>,
+        #[template_child]
         pub(crate) fixedsize_quickactions_box: TemplateChild<gtk4::Box>,
     }