How do I get keyPressEvent on a QLabel?

[Geuse]

I'm sorry if I'm flooding the forum with my posts by now. But I'm getting stuck.
This is another script which I actually would rather run outside of Maya, but I haven't been able to create an executable of it. So until I figure that out I'm just running it from Maya because that's what I'm used to.

So it's a file search UI and it works as intended, (but clearly not the most optimal search solution).
Now, I managed to create custom QLabels and adding them to a listwidget. I then overload the double mouse button click on the label to open exlorer and navigate to the directory. But I also would like to implement so that I can press enter too.
Now this is where I get stuck. I haven't succeded in implementing this. What are the steps I need to to to get this working?
At the bottom I have a method "keyPressEvent", but clearly incorrect.

# usage: run this:
'''
import dag_findFiles
from imp import reload
reload(dag_findFiles)

if __name__ == "__main__":
    try:
        test_dialog.close()
        test_dialog.deleteLater()
    except:
        pass

    test_dialog = dag_findFiles.MainWindow()
    test_dialog.show()
'''


import sys
from PySide2.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QVBoxLayout, QPushButton, QCheckBox, QFileDialog, QScrollArea
import os

from PySide2 import QtWidgets, QtGui, QtCore
from functools import partial
import maya.OpenMayaUI as omui
from shiboken2 import wrapInstance
from functools import partial

def maya_main_window():
    main_window_ptr = omui.MQtUtil.mainWindow()
    return wrapInstance(int(main_window_ptr), QWidget)    
    
    
class MainWindow(QtWidgets.QMainWindow):
    qLabels = []
    def __init__(self, parent=maya_main_window()):
        super(MainWindow, self).__init__(parent)
        self.init_ui()

    def init_ui(self):
        
        self.setWindowTitle("Find Files")
        self.setMinimumSize(400, 200)
        
        directory_label = QLabel("Directory:")
        self.directory_edit = QLineEdit()
        self.browse_button = QPushButton("Browse")
        self.browse_button.clicked.connect(self.browse_directory)
        search_word_label = QLabel("Search Word:")
        self.search_word_edit = QLineEdit()
        self.folder_checkbox = QCheckBox("Folders")
        self.folder_checkbox.setChecked(True)
        self.file_checkbox = QCheckBox("Files")
        self.file_contents_checkbox = QCheckBox("File Contents")
        self.search_button = QPushButton("Search")
        self.search_button.clicked.connect(self.find_files)
        
        self.layout = QVBoxLayout()
        self.layout.addWidget(directory_label)
        self.layout.addWidget(self.directory_edit)
        self.layout.addWidget(self.browse_button)
        self.layout.addWidget(search_word_label)
        self.layout.addWidget(self.search_word_edit)
        self.layout.addWidget(self.folder_checkbox)
        self.layout.addWidget(self.file_checkbox)
        self.layout.addWidget(self.file_contents_checkbox)
        self.layout.addWidget(self.search_button)
        
        self.listWidget = QtWidgets.QListWidget()
        self.layout.addWidget(self.listWidget)       
        
        
        central_widget = QtWidgets.QWidget()
        central_widget.setLayout(self.layout)
        self.setCentralWidget(central_widget)
        
        '''
        for i in range(10):
            label = ClickableLabel(str(i))
            #self.scrollAreaLayout.addWidget(label)
            QtWidgets.QListWidgetItem('ITEM-%04d'%i, self.listWidget)
        '''
    
    def browse_directory(self):
        directory = QFileDialog.getExistingDirectory(self, "Select Directory")
        self.directory_edit.setText(directory)

    def openDir():
        print(f'dir open:')

    def find_files(self):
        # clear listwidget
        self.listWidget.clear()
        
        directory = self.directory_edit.text()
        search_word = self.search_word_edit.text()
        matches = []
        # folder search
        if self.folder_checkbox.isChecked():
            for root, dirs, files in os.walk(directory):
                for folder in dirs:
                    if search_word.lower() in folder.lower():
                        folder_path = os.path.join(root, folder)
                        matches.append(f"{folder_path}")
        # file search
        if self.file_checkbox.isChecked():
            for root, dirs, files in os.walk(directory):
                for file in files:
                    if search_word.lower() in file.lower():
                        file_path = os.path.join(root, file)
                        matches.append(f"{file_path}")
        # file content search
        if self.file_contents_checkbox.isChecked():
            for root, dirs, files in os.walk(directory):
                for file in files:
                    file_path = os.path.join(root, file)
                    with open(file_path, "r") as f:
                        contents = f.read()
                        if search_word.lower() in contents.lower():
                            matches.append(f"{file_path}")



        '''                            
        if matches:
            result = "\n".join(matches)
        else:
            result = "No matches found."
        self.result_label.setText(result)
        '''
        for match in matches:           
            myItem = ClickableLabel(match)
            item = QtWidgets.QListWidgetItem()
            #item.setSizeHint(QtCore.QSize(0,5))
            self.listWidget.addItem(item)
            self.listWidget.setItemWidget(item, myItem)


# custom QLabel
class ClickableLabel(QLabel):
    def __init__(self, parent=None):
        super(ClickableLabel, self).__init__(parent)

    # override mouse double-click to open explorer and navigate to the directory
    def mouseDoubleClickEvent(self, event):
        if event.buttons() == QtCore.Qt.LeftButton:
            path = os.path.normpath(str(self.text()))
            print(path)
            os.startfile(path)
            
    def keyPressEvent(self, event):
        if event.key() == QtCore.Qt.Key_Enter:
            path = os.path.normpath(str(self.text()))
            print(path)
            os.startfile(path)

[jsulm]

@Geuse said in How do I get keyPressEvent on a QLabel?:

At the bottom I have a method "keyPressEvent", but clearly incorrect

Should be OK.
Is keyPressEvent called?

[Geuse]

@jsulm Thank you. No it doesn't seem it gets called. =/

[jsulm]

@Geuse Even this version:

def keyPressEvent(self, event):
    print("keyPressEvent")

?

[Geuse]

@jsulm No, it doesn't work =/

[JoeCFD]

@Geuse Does QLabel react to keyPressEvent?
Try installEventFilter( this ); use label's parent or grandparent as this? Or change qlabel to a button.

[SGaist]

Hi,

Unless your label has focus, it won't react to key press event.

[Geuse]

@SGaist I mean, the label is selected by stepping up and down the items in the list. No?

[SGaist]

@Geuse no, as the documentation says, using setItemWidget should only be used to present static content. The widget is put on top of the cell content but it's not managed by it. If you want full interaction as provided by the view, use a QStyledItemDelegate.

[Geuse]

@SGaist Thank you! I will read up on that and see how far I come.
Thank you.

[jeremy_k]

If the goal is only to detect when an item in the list is clicked or has enter pressed, putting the logic in the delegate seems like the wrong way to go.

QAbstractItemView::activated(), clicked(), QListWidget::itemActivated(), itemClicked, and several other signals are available to indicate user interaction with the view. If the *activated signals aren't triggered for the target platforms with the desired key and mouse input, override the events in the view, and use QAbstractItemView::indexAt() and currentIndex(), or QListWidget::itemAt() and currentItem().