add keyboard filter

Author: OLuwis

app/utils/keyboard_utils.py

@@ -0,0 +1,30 @@
+from utils.display_utils import DisplayUtils
+from re import match
+from PySide6.QtWidgets import QWidget
+from PySide6.QtCore import QEvent, QObject
+from PySide6.QtGui import QKeyEvent
+
+class KeyboardUtils(QObject):
+  def __init__(self, parent: QObject, displayUtils: DisplayUtils):
+    super().__init__(parent)
+
+    self.displayUtils = displayUtils
+  
+  def eventFilter(self, window: QWidget, event: QEvent) -> bool:
+    if event.type() == QEvent.Type.KeyPress:
+      eventKey = QKeyEvent(event).key()
+      eventText = QKeyEvent(event).text()
+      
+      if eventKey == 16777220:
+        self.displayUtils.calculate()
+        return True
+      if eventKey == 67:
+        self.displayUtils.clear()
+        return True
+      if eventKey == 16777219:
+        self.displayUtils.delete()
+        return True
+      if bool(match(r"[0-9]|\.|\+|-|x|/|%", eventText)):
+        self.displayUtils.insert(eventText)
+        return True
+    return False