PyQt Plualsite coursework

Pluralsite_.idea_misc.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.6.1 (C:\Python36\python.exe)" project-jdk-type="Python SDK" />
</project>

Pluralsite_.idea_modules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectModuleManager">
    <modules>
      <module fileurl="file://$PROJECT_DIR$/.idea/Pluralsite.iml" filepath="$PROJECT_DIR$/.idea/Pluralsite.iml" />
    </modules>
  </component>
</project>

Pluralsite_.idea_Pluralsite.iml

<?xml version="1.0" encoding="UTF-8"?>
<module type="PYTHON_MODULE" version="4">
  <component name="NewModuleRootManager">
    <content url="file://$MODULE_DIR$" />
    <orderEntry type="jdk" jdkName="Python 3.6.1 (C:\Python36\python.exe)" jdkType="Python SDK" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
  <component name="TestRunnerService">
    <option name="PROJECT_TEST_RUNNER" value="Unittests" />
  </component>
</module>

Pluralsite_hello_Qt_world.py

"""
#   Author      :   Robert James Patterson
#   Date        :   5/21/2017
#   Project     :   Pluralsite
#   Synopsis    :   Trying out GUI development with Python and Qt
#
"""
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys

#------------------------------------------------------------------------------------------------------


class HelloWorld(QDialog):
    """
    Create our own class from QDialog so that we may override
    some of it's methods
    """
    def __init__(self):
        QDialog.__init__(self)

        layout = QGridLayout()

        self.label = QLabel("Hello Qt World!!")
        line_edit = QLineEdit()
        button = QPushButton("Close")

        layout.addWidget(self.label, 0, 0)
        layout.addWidget(line_edit, 0, 1)
        layout.addWidget(button, 1, 1)

        self.setLayout(layout)

        button.clicked.connect(self.close)
        line_edit.textChanged.connect(self.changeTextLabel)

    def changeTextLabel(self, text):
        self.label.setText(text)

#------------------------------------------------------------------------------------------------------


app = QApplication(sys.argv)

dialog = HelloWorld()
dialog.setWindowTitle("Python for GUI")
dialog.show()
sys.exit(app.exec_())

Pluralsite_pydownloader.py

"""
#   Author      :   Robert James Patterson
#   Created     :   5/21/2017
#   Modified    :   5/22/2017
#   Project     :   pydownloader.py
#   Synopsis    :   Downloads files from a URL provided by the end user using Python and Qt5
#
"""

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
import urllib.request


class Downloader(QDialog):

    def __init__(self):
        QDialog.__init__(self)

        # Declare the layout style.
        layout = QVBoxLayout()

        # Declare components used.
        # NOTE: the 'self' declaration makes these
        #       instance wide variables.
        self.url_text = QLineEdit()
        self.save_location_text = QLineEdit()
        self.progress_bar = QProgressBar()
        download_button = QPushButton("Download")
        browse_button = QPushButton("Browse")
        quit_button = QPushButton("Close")

        # Set the placeholder text for the text boxes.
        self.url_text.setPlaceholderText("URL")
        self.save_location_text.setPlaceholderText("File save location")

        # Set up the progress bar to list the progress
        # as a value on the graphic on this control.
        self.progress_bar.setValue(0)
        self.progress_bar.setAlignment(Qt.AlignHCenter)

        # Add the widgets to the layout.
        layout.addWidget(self.url_text)
        layout.addWidget(self.save_location_text)
        layout.addWidget(browse_button)
        layout.addWidget(self.progress_bar)
        layout.addWidget(download_button)
        layout.addWidget(quit_button)

        # Bring it all together to create the app window.
        self.setLayout(layout)
        self.setWindowIcon(QIcon("downloader.png"))
        self.setWindowTitle("PyDownloader")
        self.setFocus()

        # Event handler for the quit_button click event.
        quit_button.clicked.connect(self.close)

        # Event handler for the download_button click event.
        download_button.clicked.connect(self.download)

        # Event handler for browse_button click event.
        browse_button.clicked.connect(self.browse_file)

    def browse_file(self):
        """ This is the method to allow us to browse the local
            device and set the location to download the file to.
        """
        save_file = QFileDialog.getSaveFileName(self, caption="Save File As",
                                                directory=".",
                                                filter="All Files (*.*)")

        self.save_location_text.setText(str(save_file[0]))

    def download(self):
        """ This is the method that does the actual downloading of 
            and the saving of the file specified by the end user.
        """
        url = self.url_text.text()
        save_location = self.save_location_text.text()

        try:
            urllib.request.urlretrieve(url, save_location, self.report)
        except Exception as e:
            QMessageBox.warning(self, "Warning", "Download failed : {0}".format(e))
            return

        QMessageBox.information(self, "Information", "Your download is complete.")
        # Reset the widgets on the form to their default values.
        self.progress_bar.setValue(0)
        self.url_text.setText("")
        self.save_location_text.setText("")

    def report(self, blocknum, blocksize, totalsize):
        """ This is the method that drives the reporting done by 
            the progress_bar widget.
        """
        readsofar = blocknum * blocksize
        if totalsize > 0:
            percent = readsofar * 100 / totalsize
            self.progress_bar.setValue(int(percent))


def main():
    app = QApplication(sys.argv)
    dl = Downloader()
    dl.show()

    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

Pluralsite_structure.py

"""
#   Author      :   Robert James Patterson
#   Date        :   5/21/2017
#   Project     :   Pluralsite
#   Synopsis    :   Trying out GUI development with Python and Qt
#
"""
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys

#------------------------------------------------------------------------------------------------------


class HelloWorld(QDialog):
    """
    Create our own class from QDialog so that we may override
    some of it's methods
    """
    def __init__(self):
        QDialog.__init__(self)

        layout = QVBoxLayout()
        label = QLabel("Hello Qt World!!")
        line_edit = QLineEdit()
        button = QPushButton("Close")

        layout.addWidget(label)
        layout.addWidget(line_edit)
        layout.addWidget(button)

        self.setLayout(layout)

#------------------------------------------------------------------------------------------------------


app = QApplication(sys.argv)
dialog = HelloWorld()
#dialog.resize(250, 150)
#dialog.move(300, 300)
dialog.setWindowTitle("Python for GUI")
dialog.show()
sys.exit(app.exec_())

Homework files for the Pluralsite course : Python Desktop Application Development. URL for a test file to download : http://173.249.157.79/test100.zip