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| diff --git a/pyqt.html.markdown b/pyqt.html.markdown new file mode 100644 index 00000000..6bdb6488 --- /dev/null +++ b/pyqt.html.markdown @@ -0,0 +1,82 @@ +--- +category: tool +tool: PyQT +filename: learnpyqt.py +contributors: +    - ["Nathan Hughes", "https://github.com/sirsharpest"] +--- + +**Qt** is a widely-known framework for developing cross-platform software that can be run on various software and hardware platforms with little or no change in the code, while having the power and speed of native applications. Though **Qt** was originally written in *C++*. + + +This is an adaption on the C++ intro to QT by [Aleksey Kholovchuk](https://github.com/vortexxx192 +), some of the code examples should result in the same functionality +this version just having been done using pyqt!  + +```python +import sys +from PyQt4 import QtGui +	 +def window(): +	# Create an application object  +    app = QtGui.QApplication(sys.argv) +	# Create a widget where our label will be placed in +    w = QtGui.QWidget() +	# Add a label to the widget  +    b = QtGui.QLabel(w) +	# Set some text for the label  +    b.setText("Hello World!") +	# Give some size and placement information  +    w.setGeometry(100, 100, 200, 50) +    b.move(50, 20) +	# Give our window a nice title  +    w.setWindowTitle("PyQt") +	# Have everything display +    w.show() +	# Execute what we have asked for, once all setup +    sys.exit(app.exec_()) + +if __name__ == '__main__': +    window() + +``` + +In order to get some of the more advanced features in **pyqt** we need to start looking at building additional elements.  +Here we show how to introduce a dialog popup box, useful for asking the user to confirm a decision or to provide information. + +```Python  +import sys +from PyQt4.QtGui import * +from PyQt4.QtCore import * + + +def window(): +    app = QApplication(sys.argv) +    w = QWidget() +    # Create a button and attach to widget w +    b = QPushButton(w) +    b.setText("Press me") +    b.move(50, 50) +    # Tell b to call this function when clicked +    # notice the lack of "()" on the function call +    b.clicked.connect(showdialog) +    w.setWindowTitle("PyQt Dialog") +    w.show() +    sys.exit(app.exec_()) +	 +# This function should create a dialog window with a button +# that waits to be clicked and then exits the program +def showdialog(): +    d = QDialog() +    b1 = QPushButton("ok", d) +    b1.move(50, 50) +    d.setWindowTitle("Dialog") +    # This modality tells the popup to block the parent whilst it's active +    d.setWindowModality(Qt.ApplicationModal) +    # On click I'd like the entire process to end +    b1.clicked.connect(sys.exit) +    d.exec_() + +if __name__ == '__main__': +    window() +``` | 
