gui_main.py

import os
import sys
from platform import system
from PyQt5 import QtGui
from PyQt5 import uic
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPalette, QColor
from PyQt5.QtWidgets import QInputDialog, QLineEdit, QStyleFactory, QDesktopWidget
from PyQt5.QtWidgets import QMainWindow, QApplication, QMessageBox, QFileDialog
import main

# Application root location ↓
if system() == "Windows":
    appFolder = os.path.dirname(os.path.realpath(sys.argv[0])) + "\\"
elif system() == "Linux":
    appFolder = os.path.dirname(os.path.realpath(sys.argv[0])) + "//"


class App(QMainWindow):
    def __init__(self):
        """Constructor."""
        super(App, self).__init__()
        uic.loadUi(appFolder + "ImaP.ui", self)  # Load the UI(User Interface) file.
        self.makeWindowCenter()
        self.run_system()  # main operating function of this GUI FIle
        # Status Bar Message
        self.statusBar().showMessage("Convert your image files to PDF(Portable Document Format).")
        self.setWindowTitle("Image To PDF Converter App For Desktop")

    def makeWindowCenter(self):
        """For launching windows in center."""
        qtRectangle = self.frameGeometry()
        centerPoint = QDesktopWidget().availableGeometry().center()
        qtRectangle.moveCenter(centerPoint)
        self.move(qtRectangle.topLeft())

    def run_system(self):
        """Main load function"""
        self.pushButton.clicked.connect(self.add_folder_button_on_click)
        self.pushButton_add.clicked.connect(self.add_images_button_on_click)
        self.pushButton_remove.clicked.connect(self.remove_button_on_click)
        self.pushButton_up.clicked.connect(self.up_button_on_click)
        self.pushButton_down.clicked.connect(self.down_button_on_click)
        self.pushButton_make_pdf.clicked.connect(self.make_pdf_button_on_click)
        self.pushButton_clear.clicked.connect(self.clear_button_on_click)

    def add_folder_button_on_click(self):
        """Add a Folder button"""

        dir_path = QFileDialog.getExistingDirectory(self, 'Open File')

        if dir_path != "":
            dir_files = main.make_pdf_all(dir_path)
            for i in dir_files:
                next_row = self.listWidget.count()
                self.listWidget.insertItem(next_row, i)
        else:
            return

    def add_images_button_on_click(self):
        file_name = QFileDialog.getOpenFileName(self, "Open File")
        next_row = self.listWidget.count()
        if file_name[0] != "":
            self.listWidget.insertItem(next_row, file_name[0])

    def remove_button_on_click(self):
        current_row = self.listWidget.currentRow()
        item = self.listWidget.item(current_row)
        if item is None:
            pass

        else:
            get_reply = QMessageBox.question(self, "Remove An Image File", "Do you want to remove " + str(item.text())
                                             + " from the list?", QMessageBox.Yes | QMessageBox.No)
            if get_reply == QMessageBox.Yes:
                element = self.listWidget.takeItem(current_row)
                del element
            else:
                pass

    def up_button_on_click(self):
        current_row = self.listWidget.currentRow()
        if current_row >= 1:
            item = self.listWidget.takeItem(current_row)
            self.listWidget.insertItem(current_row - 1, item)
            self.listWidget.setCurrentItem(item)

    def down_button_on_click(self):
        current_row = self.listWidget.currentRow()
        if current_row < self.listWidget.count() - 1:
            item = self.listWidget.takeItem(current_row)
            self.listWidget.insertItem(current_row + 1, item)
            self.listWidget.setCurrentItem(item)

    def clear_button_on_click(self):
        reply = QMessageBox.question(self, "Clear List Box", "Do you want to clear all the selections?",
                                     QMessageBox.Yes | QMessageBox.No)
        if reply == QMessageBox.Yes:
            self.listWidget.clear()

    def make_pdf_button_on_click(self):
        if self.listWidget.count() == 0:
            reply = QMessageBox.information(self, "Warning!", "List box is empty! Add files to list box first.",
                                            QMessageBox.Ok)

        else:
            items_list = []
            for i in range(self.listWidget.count()):
                items_list.append(str(self.listWidget.item(i).text()))

            pdf_name, ok = QInputDialog.getText(self, "PDF Name", "Give A Name To Your PDF File", QLineEdit.Normal)
            if pdf_name == "":
                QMessageBox.information(self, "Alert", "Please Give Your PDF a name.", QMessageBox.Ok)
                return
            if ok and pdf_name is not None:
                reply = QMessageBox.information(self, "PDF Location", "Let's Select A Destination "
                                                                      "To Save Your PDF File!", QMessageBox.Ok)

                if reply == QMessageBox.Ok:

                    pdf_location = QFileDialog.getExistingDirectory(self, 'Open File')
                    pdf_name += ".pdf"
                    if pdf_location == "":
                        return
                    main.make_pdf_only_selected(items_list, pdf_name, pdf_location)
                    last_reply = QMessageBox.information(self, "Done!", "Hurrah! Your PDF is ready! "
                                                                        "Go to your selected location to find "
                                                                        "the PDF.", QMessageBox.Ok)
                    if last_reply == QMessageBox.Ok:
                        pass
                else:
                    return


if __name__ == '__main__':
    app = QApplication(sys.argv)

    app.setStyle(QStyleFactory.create("Fusion"))

    darkPalette = QtGui.QPalette()
    darkColor = QColor(45, 45, 45)
    disabledColor = QColor(127, 127, 127)
    darkPalette.setColor(QPalette.Window, darkColor)
    darkPalette.setColor(QPalette.WindowText, Qt.white)
    darkPalette.setColor(QPalette.Base, QColor(40, 40, 40))
    darkPalette.setColor(QPalette.AlternateBase, darkColor)
    darkPalette.setColor(QPalette.ToolTipBase, Qt.white)
    darkPalette.setColor(QPalette.ToolTipText, Qt.white)
    darkPalette.setColor(QPalette.Text, Qt.white)
    darkPalette.setColor(QPalette.Disabled, QPalette.Text, disabledColor)
    darkPalette.setColor(QPalette.Button, darkColor)
    darkPalette.setColor(QPalette.ButtonText, Qt.white)
    darkPalette.setColor(QPalette.Disabled, QPalette.ButtonText, disabledColor)
    darkPalette.setColor(QPalette.BrightText, Qt.red)
    darkPalette.setColor(QPalette.Link, QColor(42, 130, 218))
    darkPalette.setColor(QPalette.Highlight, QColor(42, 130, 218))
    darkPalette.setColor(QPalette.HighlightedText, Qt.black)
    darkPalette.setColor(QPalette.Disabled, QPalette.HighlightedText, disabledColor)

    app.setPalette(darkPalette)
    app.setStyleSheet("QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }")

    run_main = App()  # Instantiate The App() class
    run_main.show()
    sys.exit(app.exec_())