#############################################################################
##
## Copyright (C) 2021 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
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## $QT_BEGIN_LICENSE:BSD$
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## modification, are permitted provided that the following conditions are
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##   * Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer.
##   * Redistributions in binary form must reproduce the above copyright
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#############################################################################


import sys

from PyQt6.QtCore import QDir, Qt
from PyQt6.QtGui import QFont, QPalette
from PyQt6.QtWidgets import (QApplication, QCheckBox, QColorDialog, QDialog,
        QErrorMessage, QFileDialog, QFontDialog, QFrame, QGridLayout,
        QInputDialog, QLabel, QLineEdit, QMessageBox, QPushButton)


class Dialog(QDialog):
    MESSAGE = "<p>Message boxes have a caption, a text, and up to three " \
            "buttons, each with standard or custom texts.</p>" \
            "<p>Click a button to close the message box. Pressing the Esc " \
            "button will activate the detected escape button (if any).</p>"

    def __init__(self, parent=None):
        super().__init__(parent)

        self.openFilesPath = ''

        self.errorMessageDialog = QErrorMessage(self)

        frameStyle = QFrame.Shadow.Sunken | QFrame.Shape.Panel

        self.integerLabel = QLabel()
        self.integerLabel.setFrameStyle(frameStyle)
        self.integerButton = QPushButton("QInputDialog.get&Int()")

        self.doubleLabel = QLabel()
        self.doubleLabel.setFrameStyle(frameStyle)
        self.doubleButton = QPushButton("QInputDialog.get&Double()")

        self.itemLabel = QLabel()
        self.itemLabel.setFrameStyle(frameStyle)
        self.itemButton = QPushButton("QInputDialog.getIte&m()")

        self.textLabel = QLabel()
        self.textLabel.setFrameStyle(frameStyle)
        self.textButton = QPushButton("QInputDialog.get&Text()")

        self.colorLabel = QLabel()
        self.colorLabel.setFrameStyle(frameStyle)
        self.colorButton = QPushButton("QColorDialog.get&Color()")

        self.fontLabel = QLabel()
        self.fontLabel.setFrameStyle(frameStyle)
        self.fontButton = QPushButton("QFontDialog.get&Font()")

        self.directoryLabel = QLabel()
        self.directoryLabel.setFrameStyle(frameStyle)
        self.directoryButton = QPushButton("QFileDialog.getE&xistingDirectory()")

        self.openFileNameLabel = QLabel()
        self.openFileNameLabel.setFrameStyle(frameStyle)
        self.openFileNameButton = QPushButton("QFileDialog.get&OpenFileName()")

        self.openFileNamesLabel = QLabel()
        self.openFileNamesLabel.setFrameStyle(frameStyle)
        self.openFileNamesButton = QPushButton("QFileDialog.&getOpenFileNames()")

        self.saveFileNameLabel = QLabel()
        self.saveFileNameLabel.setFrameStyle(frameStyle)
        self.saveFileNameButton = QPushButton("QFileDialog.get&SaveFileName()")

        self.criticalLabel = QLabel()
        self.criticalLabel.setFrameStyle(frameStyle)
        self.criticalButton = QPushButton("QMessageBox.critica&l()")

        self.informationLabel = QLabel()
        self.informationLabel.setFrameStyle(frameStyle)
        self.informationButton = QPushButton("QMessageBox.i&nformation()")

        self.questionLabel = QLabel()
        self.questionLabel.setFrameStyle(frameStyle)
        self.questionButton = QPushButton("QMessageBox.&question()")

        self.warningLabel = QLabel()
        self.warningLabel.setFrameStyle(frameStyle)
        self.warningButton = QPushButton("QMessageBox.&warning()")

        self.errorLabel = QLabel()
        self.errorLabel.setFrameStyle(frameStyle)
        self.errorButton = QPushButton("QErrorMessage.show&M&essage()")

        self.integerButton.clicked.connect(self.setInteger)
        self.doubleButton.clicked.connect(self.setDouble)
        self.itemButton.clicked.connect(self.setItem)
        self.textButton.clicked.connect(self.setText)
        self.colorButton.clicked.connect(self.setColor)
        self.fontButton.clicked.connect(self.setFont)
        self.directoryButton.clicked.connect(self.setExistingDirectory)
        self.openFileNameButton.clicked.connect(self.setOpenFileName)
        self.openFileNamesButton.clicked.connect(self.setOpenFileNames)
        self.saveFileNameButton.clicked.connect(self.setSaveFileName)
        self.criticalButton.clicked.connect(self.criticalMessage)
        self.informationButton.clicked.connect(self.informationMessage)
        self.questionButton.clicked.connect(self.questionMessage)
        self.warningButton.clicked.connect(self.warningMessage)
        self.errorButton.clicked.connect(self.errorMessage)

        self.native = QCheckBox()
        self.native.setText("Use native file dialog.")
        self.native.setChecked(True)
        if sys.platform not in ("win32", "darwin"):
            self.native.hide()

        layout = QGridLayout()
        layout.setColumnStretch(1, 1)
        layout.setColumnMinimumWidth(1, 250)
        layout.addWidget(self.integerButton, 0, 0)
        layout.addWidget(self.integerLabel, 0, 1)
        layout.addWidget(self.doubleButton, 1, 0)
        layout.addWidget(self.doubleLabel, 1, 1)
        layout.addWidget(self.itemButton, 2, 0)
        layout.addWidget(self.itemLabel, 2, 1)
        layout.addWidget(self.textButton, 3, 0)
        layout.addWidget(self.textLabel, 3, 1)
        layout.addWidget(self.colorButton, 4, 0)
        layout.addWidget(self.colorLabel, 4, 1)
        layout.addWidget(self.fontButton, 5, 0)
        layout.addWidget(self.fontLabel, 5, 1)
        layout.addWidget(self.directoryButton, 6, 0)
        layout.addWidget(self.directoryLabel, 6, 1)
        layout.addWidget(self.openFileNameButton, 7, 0)
        layout.addWidget(self.openFileNameLabel, 7, 1)
        layout.addWidget(self.openFileNamesButton, 8, 0)
        layout.addWidget(self.openFileNamesLabel, 8, 1)
        layout.addWidget(self.saveFileNameButton, 9, 0)
        layout.addWidget(self.saveFileNameLabel, 9, 1)
        layout.addWidget(self.criticalButton, 10, 0)
        layout.addWidget(self.criticalLabel, 10, 1)
        layout.addWidget(self.informationButton, 11, 0)
        layout.addWidget(self.informationLabel, 11, 1)
        layout.addWidget(self.questionButton, 12, 0)
        layout.addWidget(self.questionLabel, 12, 1)
        layout.addWidget(self.warningButton, 13, 0)
        layout.addWidget(self.warningLabel, 13, 1)
        layout.addWidget(self.errorButton, 14, 0)
        layout.addWidget(self.errorLabel, 14, 1)
        layout.addWidget(self.native, 15, 0)
        self.setLayout(layout)

        self.setWindowTitle("Standard Dialogs")

    def setInteger(self):    
        i, ok = QInputDialog.getInt(self, "QInputDialog.getInt()",
                "Percentage:", 25, 0, 100, 1)
        if ok:
            self.integerLabel.setText("%d%%" % i)

    def setDouble(self):    
        d, ok = QInputDialog.getDouble(self, "QInputDialog.getDouble()",
                "Amount:", 37.56, -10000, 10000, 2)
        if ok:
            self.doubleLabel.setText("$%g" % d)

    def setItem(self):    
        items = ("Spring", "Summer", "Fall", "Winter")

        item, ok = QInputDialog.getItem(self, "QInputDialog.getItem()",
                "Season:", items, 0, False)
        if ok and item:
            self.itemLabel.setText(item)

    def setText(self):
        text, ok = QInputDialog.getText(self, "QInputDialog.getText()",
                "User name:", QLineEdit.Normal, QDir.home().dirName())
        if ok and text != '':
            self.textLabel.setText(text)

    def setColor(self):    
        color = QColorDialog.getColor(Qt.GlobalColor.green, self)
        if color.isValid(): 
            self.colorLabel.setText(color.name())
            self.colorLabel.setPalette(QPalette(color))
            self.colorLabel.setAutoFillBackground(True)

    def setFont(self):    
        font, ok = QFontDialog.getFont(QFont(self.fontLabel.text()), self)
        if ok:
            self.fontLabel.setText(font.key())
            self.fontLabel.setFont(font)

    def setExistingDirectory(self):    
        options = QFileDialog.DontResolveSymlinks | QFileDialog.ShowDirsOnly
        directory = QFileDialog.getExistingDirectory(self,
                "QFileDialog.getExistingDirectory()",
                self.directoryLabel.text(), options=options)
        if directory:
            self.directoryLabel.setText(directory)

    def setOpenFileName(self):    
        options = QFileDialog.Options()
        if not self.native.isChecked():
            options |= QFileDialog.DontUseNativeDialog
        fileName, _ = QFileDialog.getOpenFileName(self,
                "QFileDialog.getOpenFileName()", self.openFileNameLabel.text(),
                "All Files (*);;Text Files (*.txt)", options=options)
        if fileName:
            self.openFileNameLabel.setText(fileName)

    def setOpenFileNames(self):    
        options = QFileDialog.Options()
        if not self.native.isChecked():
            options |= QFileDialog.DontUseNativeDialog
        files, _ = QFileDialog.getOpenFileNames(self,
                "QFileDialog.getOpenFileNames()", self.openFilesPath,
                "All Files (*);;Text Files (*.txt)", options=options)
        if files:
            self.openFilesPath = files[0]
            self.openFileNamesLabel.setText("[%s]" % ', '.join(files))

    def setSaveFileName(self):    
        options = QFileDialog.Options()
        if not self.native.isChecked():
            options |= QFileDialog.DontUseNativeDialog
        fileName, _ = QFileDialog.getSaveFileName(self,
                "QFileDialog.getSaveFileName()",
                self.saveFileNameLabel.text(),
                "All Files (*);;Text Files (*.txt)", options=options)
        if fileName:
            self.saveFileNameLabel.setText(fileName)

    def criticalMessage(self):    
        reply = QMessageBox.critical(self, "QMessageBox.critical()",
                Dialog.MESSAGE,
                QMessageBox.StandardButton.Abort | QMessageBox.StandardButton.Retry | QMessageBox.StandardButton.Ignore)
        if reply == QMessageBox.StandardButton.Abort:
            self.criticalLabel.setText("Abort")
        elif reply == QMessageBox.StandardButton.Retry:
            self.criticalLabel.setText("Retry")
        else:
            self.criticalLabel.setText("Ignore")

    def informationMessage(self):    
        reply = QMessageBox.information(self,
                "QMessageBox.information()", Dialog.MESSAGE)
        if reply == QMessageBox.StandardButton.Ok:
            self.informationLabel.setText("OK")
        else:
            self.informationLabel.setText("Escape")

    def questionMessage(self):    
        reply = QMessageBox.question(self, "QMessageBox.question()",
                Dialog.MESSAGE,
                QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No | QMessageBox.StandardButton.Cancel)
        if reply == QMessageBox.StandardButton.Yes:
            self.questionLabel.setText("Yes")
        elif reply == QMessageBox.StandardButton.No:
            self.questionLabel.setText("No")
        else:
            self.questionLabel.setText("Cancel")

    def warningMessage(self):    
        msgBox = QMessageBox(QMessageBox.Icon.Warning, "QMessageBox.warning()",
                Dialog.MESSAGE, QMessageBox.StandardButton.NoButton, self)
        msgBox.addButton("Save &Again", QMessageBox.ButtonRole.AcceptRole)
        msgBox.addButton("&Continue", QMessageBox.ButtonRole.RejectRole)
        if msgBox.exec() == QMessageBox.ButtonRole.AcceptRole:
            self.warningLabel.setText("Save Again")
        else:
            self.warningLabel.setText("Continue")

    def errorMessage(self):    
        self.errorMessageDialog.showMessage("This dialog shows and remembers "
                "error messages. If the checkbox is checked (as it is by "
                "default), the shown message will be shown again, but if the "
                "user unchecks the box the message will not appear again if "
                "QErrorMessage.showMessage() is called with the same message.")
        self.errorLabel.setText("If the box is unchecked, the message won't "
                "appear again.")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = Dialog()
    dialog.show()
    sys.exit(app.exec())
