Port to GTK4

[danirabbit]

Fixes #290
Fixes #732
Closes #804

todo:

• VAutoHider
• Drag and drop
• Backgrounding

[TheEvilSkeleton]

I made some changes to the Flatpak manifest and got it working:

From 46e706e0b8a83efcb418554ebb772a807f4ac3c5 Mon Sep 17 00:00:00 2001
From: Hari Rana <theevilskeleton@riseup.net>
Date: Fri, 27 Feb 2026 20:34:08 -0500
Subject: [PATCH] Make Flatpak work

---
 io.elementary.calendar.yml | 76 ++++++++++++++++++++++------------------------------------------------------
 1 file changed, 22 insertions(+), 54 deletions(-)

diff --git a/io.elementary.calendar.yml b/io.elementary.calendar.yml
index 895e518..7fa2b1f 100644
--- a/io.elementary.calendar.yml
+++ b/io.elementary.calendar.yml
@@ -1,6 +1,6 @@
 id: io.elementary.calendar
 runtime: io.elementary.Platform
-runtime-version: '8.2'
+runtime-version: 'daily'
 sdk: io.elementary.Sdk
 command: io.elementary.calendar
 finish-args:
@@ -50,7 +50,7 @@ modules:
     sources:
       - type: git
         url: https://github.com/libical/libical.git
-        tag: v3.0.9
+        tag: v3.0.20
 
   - name: evolution-data-server
     buildsystem: cmake-ninja
@@ -77,8 +77,8 @@ modules:
       - -DENABLE_EXAMPLES=OFF
     sources:
       - type: archive
-        url: https://download.gnome.org/sources/evolution-data-server/3.59/evolution-data-server-3.59.2.tar.xz
-        sha256: 15bd798c85dee923462bebe880761b4668b6c5065584e840900988389add83bf
+        url: https://download.gnome.org/sources/evolution-data-server/3.59/evolution-data-server-3.59.3.tar.xz
+        sha256: 49f7c887dd2c11de6c880c2de260b8efb1dfb843fc6812db2566c3aeba7310c6
         x-checker-data:
           type: gnome
           name: evolution-data-server
@@ -91,56 +91,6 @@ modules:
             url: https://launchpad.net/intltool/trunk/0.51.0/+download/intltool-0.51.0.tar.gz
             md5: 12e517cac2b57a0121cda351570f1e63
 
-  - name: clutter-gtk
-    cleanup:
-      - /share/gtk-doc
-    sources:
-      - type: archive
-        url: https://download.gnome.org/sources/clutter-gtk/1.8/clutter-gtk-1.8.4.tar.xz
-        sha256: 521493ec038973c77edcb8bc5eac23eed41645117894aaee7300b2487cb42b06
-    modules:
-      - name: cogl
-        config-opts:
-          - --disable-cogl-gst
-          - --disable-gtk-doc
-          - --enable-xlib-egl-platform
-          - --enable-wayland-egl-platform
-        cleanup:
-          - /share/gtk-doc
-          - /share/cogl/examples-data
-        sources:
-          - type: archive
-            url: https://download.gnome.org/sources/cogl/1.22/cogl-1.22.8.tar.xz
-            sha256: a805b2b019184710ff53d0496f9f0ce6dcca420c141a0f4f6fcc02131581d759
-      - name: clutter
-        config-opts:
-          - --disable-gtk-doc
-          - --enable-egl-backend
-          - --enable-wayland-backend
-          - --enable-deprecated=no
-        cleanup:
-          - /share/gtk-doc
-        sources:
-          - type: archive
-            url: https://download.gnome.org/sources/clutter/1.26/clutter-1.26.4.tar.xz
-            sha256: 8b48fac159843f556d0a6be3dbfc6b083fc6d9c58a20a49a6b4919ab4263c4e6
-      - name: clutter-gst
-        config-opts:
-          - --disable-gtk-doc
-        cleanup:
-          - /share/gtk-doc
-        sources:
-          - type: archive
-            url: https://download.gnome.org/sources/clutter-gst/3.0/clutter-gst-3.0.27.tar.xz
-            sha256: fe69bd6c659d24ab30da3f091eb91cd1970026d431179b0724f13791e8ad9f9d
-
-  - name: champlain
-    buildsystem: meson
-    sources:
-      - type: archive
-        url: https://download.gnome.org/sources/libchamplain/0.12/libchamplain-0.12.21.tar.xz
-        sha256: a915cd172a0c52944c5579fcb4683f8a878c571bf5e928254b5dafefc727e5a7
-
   - name: folks
     buildsystem: meson
     config-opts:
@@ -171,6 +121,24 @@ modules:
           type: gnome
           name: geocode-glib
 
+  - name: libshumate
+    buildsystem: meson
+    config-opts:
+      - -Dgtk_doc=false
+    sources:
+      - type: git
+        url: https://gitlab.gnome.org/GNOME/libshumate.git
+        branch: main
+    modules:
+      - name: protobuf-c
+        buildsystem: autotools
+        config-opts:
+          - --disable-protoc
+        sources:
+          - type: archive
+            url: https://github.com/protobuf-c/protobuf-c/releases/download/v1.5.2/protobuf-c-1.5.2.tar.gz
+            sha256: e2c86271873a79c92b58fef7ebf8de1aa0df4738347a8bd5d4e65a80a16d0d24
+
   - name: calendar
     buildsystem: meson
     sources:
--
libgit2 1.7.2