use QMainWindow instead of QDialog because QDialog cannot show Maximize/Minimize button in Windows11

Author: zerobikappa

plugindevtools/PluginDevTools/PluginDevToolsDialog.py

@@ -1,16 +1,12 @@
 from krita import *
-from PyQt5.QtWidgets import QDialog, QHBoxLayout
+from PyQt5.QtWidgets import QMainWindow
 from .PluginDevToolsWidget import *
 
-class PluginDevToolsDialog(QDialog):
+class PluginDevToolsDialog(QMainWindow):
     signal_closed = pyqtSignal()
     def __init__(self, parent=None):
         super().__init__(parent) 
-        self.__layout = QHBoxLayout()
-        self.setLayout(self.__layout)
         self.setWindowTitle('Plugin Developer Tools')
-        # Can keep a standalone window after setParent with qwin
-        self.setWindowFlag(Qt.WindowType.Window, True)
 
 
     def closeEvent(self, event: QtGui.QCloseEvent):

plugindevtools/PluginDevTools/PluginDevToolsStatusManager.py

@@ -80,7 +80,7 @@ def applyDialogMode(self, senderName=str()):
             return
         self.docker.setFloating(False)
         self.docker.close()
-        self.dialog.layout().addWidget(self.centralwidget)
+        self.dialog.setCentralWidget(self.centralwidget)
         self.dialog.show()
         self.dialog.activateWindow()
         type(self).mutex.unlock()

plugindevtools/PluginDevTools/__init__.py

@@ -49,19 +49,13 @@ def setup():
     statusManager.setDocker(docker)
 
     # Prepare a standalone window
-    dialog = PluginDevToolsDialog()
+    dialog = PluginDevToolsDialog(qwin)
     statusManager.setDialog(dialog)
 
     # Prepare content widget. This widget will be added into docker or dialog. Only keep one instance.
     centralwidget = PluginDevToolsWidget()
     statusManager.setCentralWidget(centralwidget)
 
-    # Set dialog's parent to qwindow, when close qwindow, dialog will be closed as well
-    statusManager.dialog.setParent(qwin)
-    # Reset windowflag to keep as a standalone window
-    # Should always reset windowflag after setParent
-    statusManager.dialog.setWindowFlag(Qt.WindowType.Window, True)
-
     statusManager.setFirstAfterStart()
 
     # Status route: modeAllHide <--> modeDocker <--> modeDialog