PySide

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Revision as of 20:27, 16 October 2014 by Renatorivo (talk | contribs) (Created page with "Quindi, usando il modulo PyQt all'interno di FreeCAD, si ha il controllo completo della sua interfaccia. È possibile ad esempio: * Aggiungere propri pannelli, widget e barre ...")
PySide

Recently, FreeCAD has switched internally to use PySide instead of PyQt. That change was mainly done because of the licenses, PySide having an LGPL license which is more compatible with FreeeCAD. Other than that, PySide works exactly the same way as PyQt, and in FreeCAD you can usually use any of them, as you prefer. If you choose to use PySide, just replace all "PyQt" in the example code below with "PySide".
Differences Between PySide and PyQt


PyQt è un modulo di Python che consente alle applicazioni in Python di creare, accedere e modificare le applicazioni Qt. Può essere utilizzato, per esempio, per creare i programmi Qt in Python oppure per accedere e modificare l'interfaccia di un'applicazione Qt in esecuzione, come FreeCAD.

Quindi, usando il modulo PyQt all'interno di FreeCAD, si ha il controllo completo della sua interfaccia. È possibile ad esempio:

  • Aggiungere propri pannelli, widget e barre degli strumenti
  • Aggiungere o nascondere gli elementi nei pannelli già esistenti
  • Modificare, reindirizzare o aggiungere connessioni tra tutti questi elementi

PyQt has an extensive API documentation, and there are many tutorials on the net to teach you how it works.

If you want to work on the FreeCAD interface, the very first thing to do is create a reference to the FreeCAD main window:

 import sys
 from PyQt4 import QtGui
 app = QtGui.qApp
 mw = app.activeWindow()

Then, you can for example browse through all the widgets of the interface:

 for child in mw.children():
    print 'widget name = ', child.objectName(), ', widget type = ', child

The widgets in a Qt interface are usually nested into "containers" widgets, so the children of our main window can themselves contain other children. Depending on the widget type, there are a lot of things you can do. Check the API documentation to see what is possible.

Adding a new widget, for example a dockWidget (which can be placed in one of FreeCAD's side panels) is easy:

 myWidget = QtGui.QDockWidget()
 mw.addDockWidget(QtCore.Qt.RightDockWidgetArea,myWidget)

You could then add stuff directly to your widget:

   myWidget.setObjectName("my Nice New Widget")
   myWidget.resize(QtCore.QSize(300,100)) # sets size of the widget
   label = QtGui.QLabel("Hello World", myWidget) # creates a label
   label.setGeometry(QtCore.QRect(50,50,200,24)) # sets its size
   label.setObjectName("myLabel") # sets its name, so it can be found by name

But a preferred method is to create a UI object which will do all of the setup of your widget at once. The big advantage is that such an UI object can be created graphically with the Qt Designer program. A typical object generated by Qt Designer is like this:

 class myWidget_Ui(object):
   def setupUi(self, myWidget):
     myWidget.setObjectName("my Nice New Widget")
     myWidget.resize(QtCore.QSize(300,100).expandedTo(myWidget.minimumSizeHint())) # sets size of the widget
 
     self.label = QtGui.QLabel(myWidget) # creates a label
     self.label.setGeometry(QtCore.QRect(50,50,200,24)) # sets its size
     self.label.setObjectName("label") # sets its name, so it can be found by name
 
   def retranslateUi(self, draftToolbar): # built-in QT function that manages translations of widgets
     myWidget.setWindowTitle(QtGui.QApplication.translate("myWidget", "My Widget", None, QtGui.QApplication.UnicodeUTF8))
     self.label.setText(QtGui.QApplication.translate("myWidget", "Welcome to my new widget!", None, QtGui.QApplication.UnicodeUTF8))

To use it, you just need to apply it to your freshly created widget like this:

 myNewFreeCADWidget = QtGui.QDockWidget() # create a new dckwidget
 myNewFreeCADWidget.ui = myWidget_Ui() # load the Ui script
 myNewFreeCADWidget.ui.setupUi(myNewFreeCADWidget) # setup the ui
 FCmw.addDockWidget(QtCore.Qt.RightDockWidgetArea,myNewFreeCADWidget) # add the widget to the main window
Pivy
Scripted objects