commit 7a0b29c83a6910494a9f162cfabc06faa56d5235
Author: oscarg <oscargrey.sld@proton.me>
Date:   Sun Jun 1 22:29:01 2025 +1200

    Initial Commit

diff --git a/main.py b/main.py
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+++ b/main.py
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+# Standard Library
+import sys
+
+# Local Library
+from util.gui.logic.app_window_types import MDIApp
+from util.gui.logic.characteristics import Characteristics, Window, Toolbar, ToolbarAction, SubWindow
+from util.gui.windows import Windows
+
+# External Library
+from PySide6.QtWidgets import QApplication, QTextEdit, QMdiSubWindow
+
+def main():
+    app = QApplication(sys.argv)
+
+    characteristics = Characteristics([
+        Window("Main Window"),
+        Toolbar("Main Toolbar", [
+            ToolbarAction("File", lambda app: print("File?")),
+            ToolbarAction("Connections", lambda app: print("Connections menu")),
+            ToolbarAction("Create Note", Windows.create_note)
+        ])
+    ])
+
+    application = MDIApp(characteristics)
+
+    application.show()
+    sys.exit(app.exec())
+
+
+if __name__ == '__main__':
+    main()
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diff --git a/util/gui/logic/app_window_types.py b/util/gui/logic/app_window_types.py
new file mode 100644
index 0000000..adce539
--- /dev/null
+++ b/util/gui/logic/app_window_types.py
@@ -0,0 +1,41 @@
+# Local Library
+from util.gui.logic.characteristics import Characteristics
+
+# External Library
+from PySide6.QtWidgets import (QApplication, QMainWindow, QMdiArea, QMdiSubWindow, QTextEdit, QPushButton, QVBoxLayout, QWidget, QToolBar)
+from PySide6.QtGui import QKeySequence, QShortcut
+
+class MDIApp(QMainWindow):
+    def __init__(self, characteristics: Characteristics):
+        super().__init__()
+
+        self.mdi_area = QMdiArea(self)
+        self.setCentralWidget(self.mdi_area)
+
+        for component in characteristics.components:
+            component.build(self)
+
+        self.fullscreen_shortcut = QShortcut(QKeySequence("F11"), self)
+        self.fullscreen_shortcut.activated.connect(self.toggle_fullscreen)
+
+    def toggle_fullscreen(self):
+        if self.isFullScreen():
+            self.showNormal()
+        else:
+            self.showFullScreen()
+
+class App(QMainWindow):
+    def __init__(self, characteristics: Characteristics):
+        super().__init__()
+
+        for component in characteristics.components:
+            component.build(self)
+
+        self.fullscreen_shortcut = QShortcut(QKeySequence("F11"), self)
+        self.fullscreen_shortcut.activated.connect(self.toggle_fullscreen)
+
+    def toggle_fullscreen(self):
+        if self.isFullScreen():
+            self.showNormal()
+        else:
+            self.showFullScreen()
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diff --git a/util/gui/logic/characteristics.py b/util/gui/logic/characteristics.py
new file mode 100644
index 0000000..c9903d2
--- /dev/null
+++ b/util/gui/logic/characteristics.py
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+# Standard Library 
+from dataclasses import dataclass
+from typing import List, Callable, Protocol
+
+# External Library
+from PySide6.QtWidgets import (QToolBar, QMainWindow, QWidget, QMdiArea,  QMdiSubWindow)
+from PySide6.QtGui import (QAction)
+
+class UIComponent(Protocol):
+    def build(self, app: QMainWindow):
+        pass
+
+@dataclass
+class ToolbarAction:
+    name: str
+    callback: Callable[[QMainWindow], None]
+
+@dataclass
+class Toolbar(UIComponent):
+    name: str
+    actions: List[ToolbarAction]
+
+    def build(self, app: QMainWindow):
+        toolbar = QToolBar(self.name)
+        for action in self.actions:
+            qt_action = QAction(action.name, app)
+            qt_action.triggered.connect(lambda checked=False, cb=action.callback: cb(app))
+            toolbar.addAction(qt_action)
+        app.addToolBar(toolbar)
+
+@dataclass
+class SubWindow(UIComponent):
+    name: str
+    content_factory: Callable[[], QWidget]
+
+    def build(self, app: QMainWindow):
+        if not hasattr(app, 'mdi_area'):
+            raise AttributeError("MDI area not found in app")
+
+        mdi_area: QMdiArea = getattr(app, 'mdi_area')
+        sub_window = QMdiSubWindow()
+        sub_window.setWidget(self.content_factory())
+        sub_window.setWindowTitle(self.name)
+        mdi_area.addSubWindow(sub_window)
+        sub_window.show()
+
+@dataclass
+class Window(UIComponent):
+    title: str
+
+    def build(self, app: QMainWindow):
+        app.setWindowTitle(self.title)
+
+@dataclass
+class Characteristics:
+    components: List[UIComponent]
+
diff --git a/util/gui/windows.py b/util/gui/windows.py
new file mode 100644
index 0000000..8020437
--- /dev/null
+++ b/util/gui/windows.py
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+# External Library
+from PySide6.QtWidgets import QApplication, QTextEdit, QMdiSubWindow
+
+class Windows:
+    note_counter = 0
+
+    @staticmethod
+    def create_note(app_instance):
+        Windows.note_counter += 1
+        sub = QMdiSubWindow()
+        sub.setWidget(QTextEdit(f"Notes {Windows.note_counter}"))
+        sub.setWindowTitle(f"Notes {Windows.note_counter}")
+        app_instance.mdi_area.addSubWindow(sub)
+        sub.show()
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