Optimized and added progressbar dialog

GUI/MainWindow.ui

@@ -58,7 +58,7 @@
     <property name="geometry">
      <rect>
       <x>20</x>
-      <y>86</y>
+      <y>90</y>
       <width>551</width>
       <height>24</height>
      </rect>
@@ -83,7 +83,7 @@
     <property name="geometry">
      <rect>
       <x>20</x>
-      <y>120</y>
+      <y>125</y>
       <width>551</width>
       <height>31</height>
      </rect>

GUI/ProgressDialog.ui

@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>500</width>
+    <height>120</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>500</width>
+    <height>120</height>
+   </size>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>500</width>
+    <height>120</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <widget class="QLabel" name="label">
+   <property name="geometry">
+    <rect>
+     <x>20</x>
+     <y>30</y>
+     <width>451</width>
+     <height>21</height>
+    </rect>
+   </property>
+   <property name="font">
+    <font>
+     <family>Courier New</family>
+     <pointsize>14</pointsize>
+    </font>
+   </property>
+   <property name="text">
+    <string>Downloading...</string>
+   </property>
+  </widget>
+  <widget class="QProgressBar" name="bar">
+   <property name="geometry">
+    <rect>
+     <x>20</x>
+     <y>60</y>
+     <width>451</width>
+     <height>25</height>
+    </rect>
+   </property>
+   <property name="maximum">
+    <number>100</number>
+   </property>
+   <property name="value">
+    <number>0</number>
+   </property>
+   <property name="textVisible">
+    <bool>true</bool>
+   </property>
+   <property name="orientation">
+    <enum>Qt::Horizontal</enum>
+   </property>
+   <property name="invertedAppearance">
+    <bool>false</bool>
+   </property>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

NGAudioDownloader.py

@@ -1,10 +1,14 @@
+import sys
 from PyQt5.uic import loadUi
 from PyQt5.QtWidgets import (
     QApplication, QMainWindow, QWidget,
     QDialog, QFileDialog, QInputDialog
 )
+from PyQt5.Qt import QThread, pyqtSignal
+from PyQt5 import QtCore
 from requests import get as load
 from bs4 import BeautifulSoup as parse
+from time import sleep
 
 
 class GUI(QMainWindow):
@@ -12,8 +16,10 @@ class GUI(QMainWindow):
 		super().__init__()
 		loadUi('GUI/MainWindow.ui',self)
 		self.dlbtn.clicked.connect(self.download)
+		self.inprocess=False
 
 	def download(self):
+		self.inprocess=True
 		# Validating input
 		songID=self.input.text()
 		page=parse(load(f'https://www.newgrounds.com/audio/listen/{songID}').text,'html.parser')
@@ -34,14 +40,56 @@ class GUI(QMainWindow):
 										 'MP3 Audio File (*.mp3)')[0]
 		if not dist: return
 		# Downloading
-		with open(dist,'wb') as out:
-			out.write(load(link).content)
+		file=load(link,stream=True)
+		global progress
+		progress.label.setText(f'Downloading "{songTitle}"...')
+		progress.setWindowTitle(f'Downloading "{songTitle}"...')
+		progress.bar.setValue(0)
+		progress.show()
+		self.thread=DownloadThread(file,dist)
+		self.thread.got_chunk.connect(lambda done:progress.bar.setValue(done))
+		self.thread.finished.connect(self.thread.finish)
+		self.thread.start()
 		self.input.clear()
+		self.inprocess=False
+
+
+class ProgressDialog(QDialog):
+	def __init__(self):
+		super().__init__()
+		loadUi('GUI/ProgressDialog.ui',self)
+		self.setWindowFlags(self.windowFlags()&~QtCore.Qt.WindowCloseButtonHint)
+
+
+class DownloadThread(QThread):
+	got_chunk=pyqtSignal(object)
+
+	def __init__(self,file,dist):
+		super().__init__()
+		self.file,self.dist=file,dist
+
+	def run(self):
+		global progress
+		total=self.file.headers.get('content-length')
+		if total is None: total=-1
+		else: total=int(total)
+		downloaded=0
+		with open(self.dist,'wb') as out:
+			for data in self.file.iter_content(chunk_size=max(total//100,1024)):
+				downloaded+=len(data)
+				out.write(data)
+				self.got_chunk.emit(100*downloaded//total)
+
+	def finish(self):
+		global progress
+		progress.hide()
+		self.deleteLater()
 
 
 if __name__ == '__main__':
     from sys import argv
     app=QApplication(argv)
     ngad=GUI()
+    progress=ProgressDialog()
     ngad.show()
-    app.exec_()
+    sys.exit(app.exec_())