Question

I am writing an app that dynamically adds and removes widgets to a QScrollView. The code below, using Qt3 and python, will give me dynamic widgets, but when I add too many to be seen, no scroll bar appears. It is not yet scrollable. I've put the relevant pieces of code below.

Any answers must be in Qt3 because my company only uses Qt3. I'm new to programming and Qt in general.

PL = parser.Plist()

class EC_Conf_App(QDialog):

def __init__(self,parent = None,name = None,modal = 0,fl = 0):
    QDialog.__init__(self,parent,name,modal,fl)

    self.gridLayout = QGridLayout(self)        
    self.scrollArea = QScrollView(self)        
    self.scrollArea.setGeometry(0, 0, 369, 286)            
    self.Form1Layout = QGridLayout(self.scrollArea)        
    self.gridLayout.addWidget(self.scrollArea, 0, 0)  

    for item in PL.plist:
        self.section_create(item.name, item.variables)

def section_create(self, name, variables):


    # ADD ROW BUTTON 
    for key, value in sorted(variables.iteritems()):
        if len(value) > 3:  # if there is more than one option for the combobox
            self.addButton = QPushButton(self.scrollArea, name + '_AddButton')


            self.addButton.setText('Add Row')
            self.Form1Layout.addWidget(self.addButton, self.Ay, self.Ax)
            self.addButton.show()                
           self.connect(self.addButton,SIGNAL("clicked()"),self.add_rows)

def add_rows(self):
    self.addButton = self.sender()
    self.addButton.name()
    copy_class = self.addButton.name()
    clean_name = copy_class[:-10]
    for item in PL.plist:
        if item.name == clean_name:
            PL.insert(item.name, item.heading, item.variables)
            self.remove_widgets()
            break

def remove_widgets(self):
    for item in self.widgets:
        item.deleteLater()
        self.Form1Layout.remove(item)             

    self.construct()

def construct(self):
    for item in PL.plist:
        self.section_create(item.name, item.variables)

Answer 1

The only way to use a layout with a QScrollView is to set the layout on its viewport(), not the view itself. This is documented.

Replace self.Form1Layout = QGridLayout(self.scrollArea) with

self.Form1Layout = QGridLayout(self.scrollArea.viewport())

This question deals with the same problem for Qt4/5.

How to add widgets to a QScrollView with Python

1 个答案: