Having arrow keys send clicks when using QListWidget - pyqt

Question

I've worked through the excellent Matplotlib GUI tutorial found at: http://blog.rcnelson.com/building-a-matplotlib-gui-with-qt-designer-part-1/. This program uses a QListWidget to select plots to show. Everything works correctly but I have one additional need. Once a item in the list is selected you can select the next or previous item with the arrow keys. The next or previous item is highlighted. What I want is a means to trigger the same event that is triggered by clicking. The click event is handled by the following code:
self.mplfigs.itemClicked.connect(self.changefig)
I've tried the following and neither works:
self.mplfigs.itemEntered.connect(self.changefig)
self.mplfigs.currentRowChanged.connect(self.changefig)
Much Google searching hasn't helped so any hints are very welcome.

Answer 1

You probably need to use itemSelectionChanged signal, in your case self.mplfigs.itemSelectionChanged.connect(self.changefig) should trigger the function, I don't have the full code but that should work and please take look here
Adding a minimal working example:
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys
class myListWidget(QListWidget):
def Clicked(self,item=None):
if not item:
item = self.currentItem()
QMessageBox.information(self, "ListWidget", "You clicked: "+item.text())
def main():
app = QApplication(sys.argv)
listWidget = myListWidget()
#Resize width and height
listWidget.resize(300,120)
listWidget.addItem("Item 1");
listWidget.addItem("Item 2");
listWidget.addItem("Item 3");
listWidget.addItem("Item 4");
listWidget.setWindowTitle('PyQT QListwidget Demo')
listWidget.itemSelectionChanged.connect(listWidget.Clicked)
listWidget.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
Original code is take from here

Answer 2

#Achayan got me very close. Here is what solved the problem. Using the following line is as was suggested:
self.mplfigs.itemSelectionChanged.connect(self.changefig)
I needed to change changefig from:
def changefig(self, item):
text = item.text()
self.rmmpl()
self.addmpl(self.fig_dict[text])
To:
def changefig(self, item=None):
if not item:
item = self.mplfigs.currentItem()
text = item.text()
self.rmmpl()
self.addmpl(self.fig_dict[text])
Unlike itemClicked, itemSelectionChanged doesn't emit the item so the extra if statement was needed to get the particular item necessary within changefig.
However, the following line of code seems to work without modifying changefig.
self.mplfigs.currentItemChanged.connect(self.changefig)
Evidently currentItemChanged emits the item like itemClicked does.