From a9a80e4ebe7952a0210ac835affa0f7e4450b089 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Wed, 22 Feb 2023 20:18:59 -0800
Subject: [PATCH] =?utf8?q?gtk:=204=20=E2=86=92=203=20:(?=
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We want to be really easy to build.

Debian Stable doesn't have GTK4 yet.
---
 Makefile        |  2 +-
 batteryviewer.c | 10 ++++++++--
 default.nix     |  4 ++--
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 5a1cc25..8bc7dbb 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ INSTALL = install -D
 INSTALL_PROGRAM = $(INSTALL)
 
 batteryviewer: batteryviewer.c
-	gcc $(shell pkg-config --cflags gtk4) -o $@ $(CFLAGS) $< $(shell pkg-config --libs gtk4)
+	gcc $(shell pkg-config --cflags gtk+-3.0) -o $@ $(CFLAGS) $< $(shell pkg-config --libs gtk+-3.0)
 
 all: batteryviewer
 
diff --git a/batteryviewer.c b/batteryviewer.c
index 7be007c..6c4304c 100644
--- a/batteryviewer.c
+++ b/batteryviewer.c
@@ -9,16 +9,22 @@ static void activate(GtkApplication *app,
                      gpointer user_data __attribute__((unused))) {
   GtkWidget *window;
   GtkWidget *button;
+  GtkWidget *button_box;
 
   window = gtk_application_window_new(app);
   gtk_window_set_title(GTK_WINDOW(window), "Window");
   gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
 
+  button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
+  gtk_container_add(GTK_CONTAINER(window), button_box);
+
   button = gtk_button_new_with_label("Hello World");
   g_signal_connect(button, "clicked", G_CALLBACK(print_hello), NULL);
-  gtk_window_set_child(GTK_WINDOW(window), button);
+  g_signal_connect_swapped(button, "clicked", G_CALLBACK(gtk_widget_destroy),
+                           window);
+  gtk_container_add(GTK_CONTAINER(button_box), button);
 
-  gtk_window_present(GTK_WINDOW(window));
+  gtk_widget_show_all(window);
 }
 
 int main(int argc, char **argv) {
diff --git a/default.nix b/default.nix
index 577f8f3..51ead9f 100644
--- a/default.nix
+++ b/default.nix
@@ -1,5 +1,5 @@
 let
-  batteryviewer = { lib, stdenv, gtk4, pkg-config, }:
+  batteryviewer = { lib, stdenv, gtk3, pkg-config, }:
     stdenv.mkDerivation {
       pname = "batteryviewer";
       version = "0.1";
@@ -7,7 +7,7 @@ let
       src = lib.cleanSource ./.;
 
       nativeBuildInputs = [ pkg-config ];
-      buildInputs = [ gtk4 ];
+      buildInputs = [ gtk3 ];
 
       makeFlags = [ "prefix=$(out)" ];
     };
-- 
2.44.1