• QFileDialog
• QMessageBox
• QInputDialog
• QColorDialog
• QFontDialog

• grp = QtWidgets.QGroupBox("QMessageBox")

  
  
  image.png

from PySide2 import QtCore, QtWidgets
from shiboken2 import wrapInstance

import maya.OpenMayaUI as omui
import maya.cmds as cmds
import pymel.core as pm

def get_maya_main_window():
    '''
    Maya main window widget as a pyside2 python object
    :return:
    '''
    maya_main_wnd = omui.MQtUtil.mainWindow()
    return wrapInstance(long(maya_main_wnd), QtWidgets.QWidget)

class ExampleDialog(QtWidgets.QDialog):

    FILE_FILTERS = 'Maya(*.ma *.mb);;Maya ASCII(*.ma);;Maya Binary(*.mb);;All Files(*.*)'
    selected_filter = 'All Files(*.*)'
    def __init__(self, parent=get_maya_main_window()):
        super(ExampleDialog, self).__init__(parent)

        self.setWindowTitle('Standard Qt Dialog UI')
        # self.setMinimumWidth(200)
        self.setWindowFlags(self.windowFlags())

        self.prefs_directory = cmds.internalVar(userPrefDir = True)

        self.create_widgets()
        self.create_layouts()
        self.create_connections()
        # QtCore.QMetaObject.connectSlotsByName(self)

    def create_widgets(self):

        # QFile_btn
        self.get_existing_dir_btn = QtWidgets.QPushButton('getExistingDirectory')
        self.get_open_file_name_btn = QtWidgets.QPushButton('getOpenFileName')
        self.get_open_file_names_btn = QtWidgets.QPushButton('getOpenFileNames')
        self.get_save_file_name_btn = QtWidgets.QPushButton('getSaveFileName')

        # QMessageBox_btn
        self.critical_btn = QtWidgets.QPushButton('critical')
        self.warning_btn = QtWidgets.QPushButton('waring')
        self.information_btn = QtWidgets.QPushButton('information')
        self.question_btn = QtWidgets.QPushButton('question')

        # QInput_btn
        self.get_double_btn = QtWidgets.QPushButton("getDouble")
        self.get_int_btn = QtWidgets.QPushButton("getInt")
        self.get_text_btn = QtWidgets.QPushButton("getText")
        self.get_multi_line_text_btn = QtWidgets.QPushButton("getMultiLineText")

        # QColorDialog_btn
        self.get_color_btn = QtWidgets.QPushButton("getColor")

        # QFontDialog_btn
        self.get_font_btn = QtWidgets.QPushButton("getFont")


    def create_layouts(self):
        main_layout = QtWidgets.QVBoxLayout(self)
        # QFileDialog_layout
        grp_layout = QtWidgets.QHBoxLayout()
        grp_layout.addWidget(self.get_existing_dir_btn)
        grp_layout.addWidget(self.get_open_file_name_btn)
        grp_layout.addWidget(self.get_open_file_names_btn)
        grp_layout.addWidget(self.get_save_file_name_btn)
        grp_layout.addStretch()
        grp = QtWidgets.QGroupBox("QFileDialog")
        grp.setLayout(grp_layout)
        main_layout.addWidget(grp)

        # QMessageBox_layout
        grp_layout = QtWidgets.QHBoxLayout()
        grp_layout.addWidget(self.critical_btn)
        grp_layout.addWidget(self.warning_btn)
        grp_layout.addWidget(self.information_btn)
        grp_layout.addWidget(self.question_btn)
        grp_layout.addStretch()
        grp = QtWidgets.QGroupBox("QMessageBox")
        grp.setLayout(grp_layout)
        main_layout.addWidget(grp)

        # QInput_layout
        grp_layout = QtWidgets.QHBoxLayout()
        grp_layout.addWidget(self.get_double_btn)
        grp_layout.addWidget(self.get_int_btn)
        grp_layout.addWidget(self.get_text_btn)
        grp_layout.addWidget(self.get_multi_line_text_btn)
        grp_layout.addStretch()
        grp = QtWidgets.QGroupBox("QInputDialog")
        grp.setLayout(grp_layout)
        main_layout.addWidget(grp)

        # QColorDialog_layout
        grp_layout = QtWidgets.QHBoxLayout()
        grp_layout.addWidget(self.get_color_btn)
        grp_layout.addStretch()
        grp = QtWidgets.QGroupBox("QColorDialog")
        grp.setLayout(grp_layout)
        main_layout.addWidget(grp)

        # QFontDialog_layout
        grp_layout = QtWidgets.QHBoxLayout()
        grp_layout.addWidget(self.get_font_btn)
        grp_layout.addStretch()
        grp = QtWidgets.QGroupBox("QFontDialog")
        grp.setLayout(grp_layout)
        main_layout.addWidget(grp)

        main_layout.addStretch()

    def create_connections(self):

        self.get_existing_dir_btn.clicked.connect(self.get_existing_directory)
        self.get_open_file_name_btn.clicked.connect(self.get_openFile_name)
        self.get_open_file_names_btn.clicked.connect(self.get_openFile_names)
        self.get_save_file_name_btn.clicked.connect(self.get_saveFile_name)

        self.critical_btn.clicked.connect(self.critical)
        self.warning_btn.clicked.connect(self.warning_)
        self.information_btn.clicked.connect(self.information)
        self.question_btn.clicked.connect(self.question)

        self.get_double_btn.clicked.connect(self.get_float)
        self.get_int_btn.clicked.connect(self.get_int)
        self.get_text_btn.clicked.connect(self.get_text)
        self.get_multi_line_text_btn.clicked.connect(self.get_multi_line_text)

        self.get_color_btn.clicked.connect(self.get_color)
        self.get_font_btn.clicked.connect(self.get_font)

    # ___Slots___
    # QFile
    def get_existing_directory(self):
        directory = QtWidgets.QFileDialog.getExistingDirectory(self, 'Select Directory',
                                                               self.prefs_directory)
        if directory:
            print 'File path: {}'.format(directory)

    def get_openFile_name(self):
        file_path, self.selected_filter = QtWidgets.QFileDialog.getOpenFileName(self, "Select File", "",
                                                                                self.FILE_FILTERS,
                                                                                self.selected_filter)

        if file_path:
            print 'File path: {}'.format(file_path)

    def get_openFile_names(self):
        file_paths, self.selected_filter = QtWidgets.QFileDialog.getOpenFileNames(self, "Select File", "",
                                                                                self.FILE_FILTERS,
                                                                                self.selected_filter)
        if file_paths:
            print 'File path: {}'.format(file_paths)

    def get_saveFile_name(self):
        file_path, self.selected_filter = QtWidgets.QFileDialog.getSaveFileName(self, "Save File", "",
                                                                                self.FILE_FILTERS,
                                                                                self.selected_filter)
        if file_path:
            print 'File path: {}'.format(file_path)

    #QMessageBox
    def critical(self):

        QtWidgets.QMessageBox.critical(self, "Error", "There was an Error somewhere")

    def warning_(self):

        QtWidgets.QMessageBox.warning(self, "Waring", 'Something odd just happened')

    def information(self):

        QtWidgets.QMessageBox.information(self, "Info", "Task completed successfully")

    def question(self):
        QtWidgets.QMessageBox.question(self, 'Question', 'Would you like to continue?')

    # QInput
    def get_float(self):
        value, ok = QtWidgets.QInputDialog.getDouble(self, 'Enter a Value', 'Value:')
        if ok:
            print value

    def get_int(self):
        value, ok = QtWidgets.QInputDialog.getInt(self, 'Enter a Value', 'Value:')
        if ok:
            print value

    def get_text(self):
        text, ok = QtWidgets.QInputDialog.getText(self, 'Enter Text', 'Text:')
        if ok:
            print text

    def get_multi_line_text(self):
        text, ok = QtWidgets.QInputDialog.getMultiLineText(self, 'Enter Text', 'Text:')
        if ok:
            print text

    # QColor
    def get_color(self):
        color = QtWidgets.QColorDialog.getColor(parent=self)
        if color:
            print("Red:{0} Green:{1} Blue:{2}".format(color.red(), color.green(), color.blue()))

    def get_font(self):
        font, ok = QtWidgets.QFontDialog.getFont(parent=self)
        if ok:
            print("Family: {0}  Point Size: {1}".format(font.family(), font.pointSize()))

if __name__ == '__main__':

    try:
        myTest_ui.close()  # pylint:disable = E0601
        myTest_ui.deleteLater()  # pylint:disable = E0601
    except:
        pass

    myTest_ui = ExampleDialog()
    myTest_ui.show()