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Translate: Header + Part 1
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fr-fr/pyqt-fr.html.markdown
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---
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category: tool
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tool: PyQT
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filename: learnpyqt-fr.py
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contributors:
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- ["Nathan Hughes", "https://github.com/sirsharpest"]
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translators:
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- ["DevHugo", "http://twitter.com/devhugo"]
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lang: fr-fr
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---
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**Qt** est un framework très connu pour le développement de logiciel cross-platform qui peuvent être lancé sur différents systèmes avec de petit ou aucun changement dans le code, tout en ayant la puissance et la vitesse des applications natives. Bien que **Qt** ait été écrit à l'origine en *C++*.
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Ceci est une adaptation de l'intro C++ à QT par [Aleksey Kholovchuk](https://github.com/vortexxx192
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), certains exemples du code doivent avoir la même fonctionnalité,
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cette version ayant juste été faite en utilisant pyqt!
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```python
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import sys
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from PyQt4 import QtGui
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def window():
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# Création de l'objet application
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app = QtGui.QApplication(sys.argv)
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# Création d'un widget où notre label sera placé
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w = QtGui.QWidget()
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# Ajout d'un label au widget
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b = QtGui.QLabel(w)
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# Assignation de texte au label
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b.setText("Hello World!")
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# Assignation des tailles et des informations de placement
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w.setGeometry(100, 100, 200, 50)
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b.move(50, 20)
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# Assignation d'un nom à notre fenêtre
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w.setWindowTitle("PyQt")
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# Affichage de la fenêtre
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w.show()
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# Exécution de l'application
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sys.exit(app.exec_())
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if __name__ == '__main__':
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window()
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```
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In order to get some of the more advanced features in **pyqt** we need to start looking at building additional elements.
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Here we show how to introduce a dialog popup box, useful for asking the user to confirm a decision or to provide information.
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```Python
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import sys
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from PyQt4.QtGui import *
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from PyQt4.QtCore import *
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def window():
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app = QApplication(sys.argv)
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w = QWidget()
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# Create a button and attach to widget w
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b = QPushButton(w)
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b.setText("Press me")
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b.move(50, 50)
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# Tell b to call this function when clicked
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# notice the lack of "()" on the function call
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b.clicked.connect(showdialog)
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w.setWindowTitle("PyQt Dialog")
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w.show()
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sys.exit(app.exec_())
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# This function should create a dialog window with a button
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# that waits to be clicked and then exits the program
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def showdialog():
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d = QDialog()
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b1 = QPushButton("ok", d)
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b1.move(50, 50)
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d.setWindowTitle("Dialog")
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# This modality tells the popup to block the parent whilst it's active
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d.setWindowModality(Qt.ApplicationModal)
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# On click I'd like the entire process to end
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b1.clicked.connect(sys.exit)
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d.exec_()
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if __name__ == '__main__':
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window()
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```
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