🎉 Add a dialog to ask for support

prefs.js

@@ -394,6 +394,25 @@ var PreferencesDialog = class PreferencesDialog {
           });
       }
 
+      // Count the number of times the user has opened the preferences window. Every now
+      // and then, we show a dialog asking the user to support the extension.
+      const showSupportDialog = this._settings.get_boolean('show-support-dialog');
+      if (showSupportDialog) {
+        const count = this._settings.get_int('prefs-open-count') + 1;
+        this._settings.set_int('prefs-open-count', count);
+
+        if (count % 10 == 0) {
+          const dialog = this._builder.get_object('support-dialog');
+          dialog.set_transient_for(window);
+          dialog.connect('response', (dialog, response) => {
+            if (response === 'never') {
+              this._settings.set_boolean('show-support-dialog', false);
+            }
+          });
+          dialog.show();
+        }
+      }
+
       // Populate the menu with actions.
       const group = Gio.SimpleActionGroup.new();
       window.insert_action_group('prefs', group);

resources/ui/adw/prefs.ui

@@ -37,6 +37,40 @@ SPDX-License-Identifier: GPL-3.0-or-later
     </style>
   </object>
 
+  <!-- This dialog is occasionaly shown to ask the user for support. -->
+  <object class="AdwMessageDialog" id="support-dialog">
+    <property name="heading">Do you want to support Burn-My-Windows?</property>
+    <property name="body">If only one out of ten users would support this project with 1$ / month, I could work full-time on open-source projects!</property>
+    <property name="default-response">later</property>
+    <property name="close-response">later</property>
+    <responses>
+      <response id="never" appearance="destructive">Do not show this again!</response>
+      <response id="later">Maybe later...</response>
+    </responses>
+    <property name="extra-child">
+      <object class="GtkBox">
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkLabel">
+            <property name="hexpand">true</property>
+            <property name="halign">start</property>
+            <property name="use-markup">true</property>
+            <property name="label">Support me on Ko-fi: &lt;a href='https://ko-fi.com/schneegans'&gt;https://ko-fi.com/schneegans&lt;/a&gt;</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkLabel">
+            <property name="hexpand">true</property>
+            <property name="halign">start</property>
+            <property name="use-markup">true</property>
+            <property name="label">Support me on GitHub: &lt;a href='https://github.com/sponsors/schneegans'&gt;https://github.com/sponsors/schneegans&lt;/a&gt;</property>
+          </object>
+        </child>
+      </object>
+    </property>
+
+  </object>
+
   <object class="AdwFlap" id="profile-editor-flap">
     <property name="orientation">vertical</property>
     <property name="fold-threshold-policy">natural</property>

schemas/org.gnome.shell.extensions.burn-my-windows.gschema.xml

@@ -43,6 +43,18 @@ SPDX-License-Identifier: CC0-1.0
       <description>Used to check whether the extension got updated from the extension side.</description>
     </key>
 
+    <key name="prefs-open-count" type="i">
+      <default>0</default>
+      <summary>Prefs Open Count</summary>
+      <description>The number of times the settings dialog was openend.</description>
+    </key>
+
+    <key name="show-support-dialog" type="b">
+      <default>true</default>
+      <summary>Show Support Dialog</summary>
+      <description>If set to false, the ask-for-support dialog will never be shown.</description>
+    </key>
+
   </schema>
 
 </schemalist>