remember if maximized

data/ui/sernatur.window.ui

@@ -21,6 +21,7 @@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
     <property name="title">SERNATUR</property>
     <property name="icon_name">sernatur</property>
     <property name="show_menubar">False</property>
+    <signal name="window-state-event" handler="state_handler" swapped="no"/>
     <child>
       <placeholder/>
     </child>

src/sernatur-window.vala

@@ -24,6 +24,26 @@ namespace Sernatur {
 	[GtkTemplate (ui = "/cl/cromer/ubb/sernatur/sernatur.window.ui")]
 	public class MainWindow : Gtk.ApplicationWindow {
 
+		/**
+		 * This is a callback for when the window's state changes
+		 * @param widget The widget that called this GtkCallback
+		 * @param state The event window state_handler
+		 * @return Returns true or false
+		 */
+		[GtkCallback]
+		private bool state_handler(Gtk.Widget widget, Gdk.EventWindowState state) {
+			Settings settings = new Settings ("cl.cromer.ubb.sernatur");
+			if (state.changed_mask == Gdk.WindowState.MAXIMIZED && (state.new_window_state & Gdk.WindowState.MAXIMIZED) != 0) {
+				// Maximized
+				settings.set_boolean ("maximized", true);
+			}
+			else if (state.changed_mask == Gdk.WindowState.MAXIMIZED && (state.new_window_state & Gdk.WindowState.MAXIMIZED) == 0) {
+				// Unmaximized
+				settings.set_boolean ("maximized", false);
+			}
+			return true;
+		}
+
 		/**
 		* Initialize the main window class
 		* @param application The application used to make the GLib object

src/sernatur.vala

@@ -46,6 +46,7 @@ namespace Sernatur {
 			try {
 				window.icon = IconTheme.get_default ().load_icon ("sernatur", 48, 0);
 			}
+
 			catch (Error e) {
 				stderr.printf ("Could not load application icon: %s\n", e.message);
 			}