CODEWITHSUNDEEP
pythonpyqt4qlistwidget
HelloWorld_PyNoob
HelloWorld_PyNoob

Reputation: 41

PyQt4: Move items from one QListWidget to another

I created an interface on Qt Designer and am using it in a QGIS plugin. The interface consists of a source listWidget, a destination listWidget, and pushButton.

I am trying to bring selected items over from the source listWidget to the destination listWidget.

I populated by my source listWidget using:

self.ui.listWidget_1.addItems(soilList)

And so far I have written my button signal as: 

QObject.connect(self.ui.pushButton, SIGNAL("clicked()"), self.click_pushButton)

But now I am having trouble writing the click_pushButton function that populates the destination listWidget. Any help would be appreciated, thanks!

Upvotes: 2

Views: 3260

Answers (2)

Joseph Reierson
Joseph Reierson

Reputation: 11

A QListwidgetitem can only exist in one QListwidget unless cloned.

Here is a straightforward PyQt5 solution which avoids the bookkeeping of indices:

self.ui.clone_items_button.clicked.connect(self.clone_selected_listwidgetitems)

def clone_selected_listwidgetitems(self)
    for sel_item in self.ui.source_listwidget.selectedItems():
        cloned_item = sel_item.clone()
        self.ui.destination_listwidget.addItem(cloned_item)

Upvotes: 1

Avaris
Avaris

Reputation: 36715

QListWidget.selectedIndexes() will return a list of indexes for selected items. Where each index has a .row() method returning the row of the item. Then you can use .takeItem() to get (and remove) the item from the first list, and add it to the second list via .addItem().

That translates to:

def click_pushButton(self):
    # sort rows in descending order in order to compensate shifting due to takeItem
    rows = sorted([index.row() for index in self.ui.listWidget_1.selectedIndexes()],
                  reverse=True)
    for row in rows:
        # assuming the other listWidget is called listWidget_2
        self.ui.listWidget_2.addItem(self.ui.listWidget_1.takeItem(row))

# moving all items:
def click_pushButton(self):
    for row in reversed(range(self.ui.listWidget_1.count()):
        # assuming the other listWidget is called listWidget_2
        self.ui.listWidget_2.addItem(self.ui.listWidget_1.takeItem(row))

By the way, please give your widgets/methods meaningful names. listWidget_1 or click_pushButton says nothing about what these stand for.

And use new style signals and slots. You can write that connect statement like this:

self.ui.pushButton.clicked.connect(self.click_pushButton)

Upvotes: 2

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