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+# gtk-blueprint-tool
+
+A prototype markup language for GTK user interface files.
+
+## Motivation
+
+GtkBuilder XML format is quite verbose, and many app developers don't like
+using WYSIWYG editors for creating UIs. Blueprint files are intended to be a
+concise, easy-to-read format that makes it easier to create and edit GTK UIs.
+
+Internally, it compiles to GtkBuilder XML as part of an app's build system. It
+adds no new features, just makes the features that exist more accessible.
+
+Another goal is to have excellent developer tooling--including a language
+server--so that less knowledge of the format is required. Hopefully this will
+increase adoption of cool advanced features like GtkExpression.
+
+## Example
+
+Here is what [the libshumate demo's UI definition](https://gitlab.gnome.org/GNOME/libshumate/-/blob/main/demos/shumate-demo-window.ui)
+looks like ported to this new format:
+
+```
+@gtk 4.0;
+
+@import Adw 1.0;
+@import Shumate 1.0;
+
+@template ShumateDemoWindow : Gtk.ApplicationWindow {
+  can-focus: yes;
+  title: _("Shumate Demo");
+  default-width: 800;
+  default-height: 600;
+
+  [titlebar]
+  Gtk.HeaderBar {
+    Gtk.DropDown layers_dropdown {
+      notify::selected => on_layers_dropdown_notify_selected() swapped;
+    }
+  }
+
+  Gtk.Overlay overlay {
+    vexpand: true;
+    Shumate.Map map {}
+
+    [overlay]
+    Shumate.Scale scale {
+      halign: start;
+      valign: end;
+    }
+
+    [overlay]
+    Gtk.Box {
+      orientation: vertical;
+      halign: end;
+      valign: end;
+
+      Shumate.Compass compass {
+        halign: end;
+        map: map;
+      }
+      Shumate.License license {
+        halign: end;
+      }
+    }
+  }
+}
+```
+
+## License
+
+Copyright (C) 2021 James Westman <james@jwestman.net>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+## Donate
+
+You can support my work on GitHub Sponsors! <https://github.com/sponsors/flyingpimonster/>