#187 - First prototype of new UI main application, outer layer

Author: dmh23

src/prototype_ui/__init__.py

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+import os
+
+from PyQt6.QtGui import QAction, QIcon
+from PyQt6.QtWidgets import QStyle
+
+ICON_DIRECTORY = os.path.join("icons")
+ICON_FILE_EXTENSION = ".png"
+
+
+class Actions:
+    def __init__(self, style: QStyle):
+        self._style = style
+        assert os.path.isdir(ICON_DIRECTORY)
+
+        self.file_new = QAction("New")
+        self.file_new.setShortcut("Ctrl+N")
+        self.file_new.setIcon(style.standardIcon(QStyle.StandardPixmap.SP_ArrowBack))
+
+        self.file_open = QAction("Open")
+        self.file_open.setShortcut("Ctrl+O")
+        self.file_open.setIcon(self.get_custom_icon("sample_icon"))
+
+        self.file_save = QAction("Save")
+        self.file_save.setShortcut("Ctrl+S")
+        self.file_save.setIcon(style.standardIcon(QStyle.StandardPixmap.SP_DirHomeIcon))
+
+        self.file_save_as = QAction("Save As")
+        self.file_save_as.setShortcut("Ctrl+A")
+        self.file_save_as.setIcon(style.standardIcon(QStyle.StandardPixmap.SP_DialogOpenButton))
+
+    @staticmethod
+    def get_custom_icon(icon_name: str):
+        file_path = os.path.join(ICON_DIRECTORY, icon_name + ".png")
+        assert os.path.isfile(file_path)
+        return QIcon(file_path)

src/prototype_ui/actions.py

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+import sys
+import os
+
+from PyQt6.QtCore import Qt
+from PyQt6.QtWidgets import QMainWindow, QApplication, QLabel, QProgressBar
+
+from prototype_ui.actions import Actions
+from prototype_ui.menubar import MenuBarManager
+from prototype_ui.toolbar import ToolBarManager
+
+
+class MainWindow(QMainWindow):
+    def __init__(self):
+        super().__init__()
+
+        self.setMinimumSize(200, 200)
+        self.resize(500, 400)
+        self.setWindowTitle("Example")
+
+        # Status Bar
+        self._status_bar_label = QLabel("Hello Status Bar")
+        self._status_bar_progress = QProgressBar()
+        self._status_bar_progress.setRange(0, 10)
+        self._status_bar_progress.setValue(7)
+        self.statusBar().addPermanentWidget(self._status_bar_label)
+        self.statusBar().addPermanentWidget(self._status_bar_progress)
+
+        # Define UI actions
+        self._actions = Actions(self.style())
+
+        # Menu & Tool bars
+        self._menu_bar_manager = MenuBarManager(self.menuBar(), self._actions)
+        self._tool_bar_manager = ToolBarManager(self.addToolBar("Main"), self._actions)
+
+        # Connect actions with callback methods to implement them
+        self._actions.file_new.triggered.connect(self._new_file)
+        self._actions.file_open.triggered.connect(self._open_file)
+
+        self.canvas = QLabel("Hello")
+        self.setCentralWidget(self.canvas)
+
+        self.show()
+
+    def _new_file(self):
+        print("New File")
+        self.statusBar().showMessage("Hello Briefly", 5000)    # 5 secs
+
+    def _open_file(self):
+        self.canvas.setCursor(Qt.CursorShape.CrossCursor)
+
+
+if __name__ == '__main__':
+    app = QApplication([])
+
+    # app.setStyleSheet("QLabel { color: red }   QProgressBar::chunk { background-color: blue }")
+
+    window = MainWindow()
+    sys.exit(app.exec())

src/prototype_ui/icons/sample_icon.png

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+from PyQt6.QtWidgets import QMenuBar
+
+from prototype_ui.actions import Actions
+
+
+class MenuBarManager:
+    def __init__(self, menu_bar: QMenuBar, actions: Actions):
+        self._menu_bar = menu_bar
+        self._actions = actions
+        self.setup_menu_bar()
+
+    def setup_menu_bar(self):
+        self._create_file_menu()
+
+    def _create_file_menu(self):
+        menu = self._menu_bar.addMenu("File")
+        menu.addAction(self._actions.file_new)
+        menu.addAction(self._actions.file_open)
+        menu.addAction(self._actions.file_save)
+        menu.addAction(self._actions.file_save_as)

src/prototype_ui/main.py

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+from PyQt6.QtWidgets import QToolBar
+
+from prototype_ui.actions import Actions
+
+
+class ToolBarManager:
+    def __init__(self, tool_bar: QToolBar, actions: Actions):
+        self._toolbar = tool_bar
+        self._actions = actions
+        self.setup_tool_bar()
+
+    def setup_tool_bar(self):
+        self._toolbar.addAction(self._actions.file_new)
+        self._toolbar.addAction(self._actions.file_open)
+        self._toolbar.addAction(self._actions.file_save)
+        self._toolbar.addAction(self._actions.file_save_as)