PyQt - mwicat/personal GitHub Wiki

Install

osx

brew install pyqt5

linux

sudo apt install python3-pyqt5 python3-pyqt5.qtwebengine

run in event loop

not working!

from PyQt5.QtCore import Qt, QTimer
QTimer.singleShot(0, lambda: myfun)

timer

from PyQt5.QtCore import Qt, QTimer


def tick():
    print 'tick'

timer = QTimer()
timer.timeout.connect(tick)

QTimer.singleShot(0, lambda: timer.start(1000))  # must be ran in event loop

Always on top

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import *
from PyQt5 import QtGui

app = QApplication([])

window = QWidget()
window.setWindowFlags(Qt.WindowStaysOnTopHint)
window.show()

app.exec_()

Focus window

getattr(window, "raise")()

Buttons with icons

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import *
from PyQt5 import QtGui


def on_click():
    print('PyQt5 button click')


app = QApplication([])

window = QWidget()
window.setWindowFlags(Qt.WindowStaysOnTopHint)

layout = QVBoxLayout()

button_up = QPushButton('Transpose Up')
button_up.setIcon(QtGui.QIcon('up.png'))
button_up.clicked.connect(on_click)

button_down = QPushButton('Transpose Down')
button_down.setIcon(QtGui.QIcon('down.png'))

layout.addWidget(button_up)
layout.addWidget(button_down)

window.setLayout(layout)
window.show()

app.exec_()

Listbox with checkbox

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import *


def on_item_click(item):
    print('checked:', item.checkState() == Qt.Checked)
    print('data', item.data(Qt.UserRole))


app = QApplication([])

window = QWidget()
window.setWindowFlags(Qt.WindowStaysOnTopHint)

layout = QVBoxLayout()

listwidget = QListWidget()
listwidget.itemClicked.connect(on_item_click)


def create_item(text, data):
    item = QListWidgetItem(text)
    item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
    item.setCheckState(Qt.Unchecked)
    item.setData(Qt.UserRole, data)
    return item


listwidget.addItem(create_item('Item 1', 'item1'))

layout.addWidget(listwidget)

window.setLayout(layout)
window.show()

app.exec_()

Timer

from PyQt4.QtCore import QTimer

def tick():
    print 'tick'

timer = QTimer()
timer.timeout.connect(tick)
timer.start(1000)

Embed website

from PyQt5.QtCore import Qt, QUrl
from PyQt5.QtWidgets import *
from PyQt5 import QtGui
from PyQt5.QtWebEngineWidgets import QWebEngineView as QWebView

app = QApplication([])

win = QWebView()

url = 'https://www.google.pl/'
win.load(QUrl(url))
win.show()

app.exec_()

Grid layout

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import *
from PyQt5 import QtGui


app = QApplication([])
win = QWidget()
grid = QGridLayout()


def get_widget(i):
    return QPushButton("Button %d" % i)


widgets = [get_widget(i) for i in range(16)]

pos = 0
for i in range(1, 5):
    for j in range(1, 5):
        grid.addWidget(widgets[pos], i, j)
        pos += 1


win.setLayout(grid)
win.show()
app.exec_()

App on top

Custom widget

package deploy exe dmg

QWebPage javascript callback

from PyQt4 import QtCore, QtGui, QtWebKit

class MyDialog(QtGui.QMainWindow):

    def __init__(self):
        super(MyDialog, self).__init__()
        self.setWindowTitle("QWebView JavaScript Events")

        web_view = QtWebKit.QWebView(self)
        web_view.setHtml("""
            <html>
                <body>
                    <input type="text" name="text1"/><br/>
                    <input type="text" name="text2"/><br/>
                    <input type="submit" value="OK"/>
                </body>
            </html>""")
        self.setCentralWidget(web_view)

        main_frame = web_view.page().mainFrame()
        main_frame.addToJavaScriptWindowObject("MainWindow", self)

        doc_element = main_frame.documentElement()
        doc_element.evaluateJavaScript("""
            function isTextElement(el) {
                return el.tagName == "INPUT" && el.type == "text";
            }
            this.addEventListener("DOMFocusIn", function(e) {
                if (isTextElement(e.target)) {
                    MainWindow.handleFocusIn(e.target.name);
                }
            }, false);
            this.addEventListener("DOMFocusOut", function(e) {
                if (isTextElement(e.target)) {
                    MainWindow.handleFocusOut(e.target.name);
                }
            }, false)
        """)

        self.resize(300, 150)

    @QtCore.pyqtSlot(QtCore.QVariant)
    def handleFocusIn(self, element_name):
        QtGui.QMessageBox.information(
            self, "HTML Event", "Focus In: " + element_name)

    @QtCore.pyqtSlot(QtCore.QVariant)
    def handleFocusOut(self, element_name):
        QtGui.QMessageBox.information(
            self, "HTML Event", "Focus Out: " + element_name)


app = QtGui.QApplication([])
dialog = MyDialog()
dialog.show()
app.exec_()

Embed qt console

https://gist.github.com/pberkes/5266744

Add a custom footer
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