PyQt5画面の部分をグラブして保存する

Question

私はスクリプトを起動できるはずですので、画面の一部を選択してからEnterキーを押すか、トリガーして選択内容を保存してください。

私は他の投稿やものからコードの良いビットを持っていますが、今は固まっています。私は画面の任意の部分を選択し、必要に応じてサイズを変更することができますが、私はそれが "入力"キーを認識するように見えることはできません。今、 "keyPressEvent"関数はメッセージを出力することになっているので、それはうまくいきますが、何も得られません。何か案は？

import sys 
from PyQt5 import QtGui, QtCore, QtWidgets 
from PyQt5.QtCore import Qt, QPoint, QRect, QSize 
from PyQt5.QtGui import QScreen 
from PyQt5.QtWidgets import QApplication, QLabel, QRubberBand 


class MyLabel(QtWidgets.QLabel): 

    def __init__(self, parent=None): 
     QtWidgets.QLabel.__init__(self, parent) 
     self.selection = QtWidgets.QRubberBand(QtWidgets.QRubberBand.Rectangle, self) 


    def keyPressEvent(self, qKeyEvent): 
     print(qKeyEvent.key()) 
     if qKeyEvent.key() == QtCore.Qt.Key_Return: 
      print('Enter pressed') 
     else: 
      super().keyPressEvent(qKeyEvent) 

    def mousePressEvent(self, event): 
     ''' 
      Mouse is pressed. If selection is visible either set dragging mode (if close to border) or hide selection. 
      If selection is not visible make it visible and start at this point. 
     ''' 

     if event.button() == QtCore.Qt.LeftButton: 

      position = QtCore.QPoint(event.pos()) 
      if self.selection.isVisible(): 
       # visible selection 
       if (self.upper_left - position).manhattanLength() < 20: 
        # close to upper left corner, drag it 
        self.mode = "drag_upper_left" 
       elif (self.lower_right - position).manhattanLength() < 20: 
        # close to lower right corner, drag it 
        self.mode = "drag_lower_right" 
       else: 
        # clicked somewhere else, hide selection 
        self.selection.hide() 
      else: 
       # no visible selection, start new selection 
       self.upper_left = position 
       self.lower_right = position 
       self.mode = "drag_lower_right" 
       self.selection.show() 

    def mouseMoveEvent(self, event): 
     ''' 
      Mouse moved. If selection is visible, drag it according to drag mode. 
     ''' 

     if self.selection.isVisible(): 
      # visible selection 
      if self.mode is "drag_lower_right": 
       self.lower_right = QtCore.QPoint(event.pos()) 
      elif self.mode is "drag_upper_left": 
       self.upper_left = QtCore.QPoint(event.pos()) 
      # update geometry 
      self.selection.setGeometry(QtCore.QRect(self.upper_left, self.lower_right).normalized()) 


class mainUI(QtWidgets.QWidget): 

    def __init__(self): 
     super(mainUI, self).__init__() 
     self.initUI() 

    def initUI(self): 
     layout = QtWidgets.QVBoxLayout(self) 

     label = MyLabel(self) 
     pixmap = QScreen.grabWindow(app.primaryScreen(), app.desktop().winId()) 
     label.setPixmap(pixmap) 
     layout.addWidget(label) 

     self.setLayout(layout) 

     geometry = app.desktop().availableGeometry() 

     self.setFixedSize(geometry.width(), geometry.height()) 

     # self.setWindowFlags(self.windowFlags() | Qt.FramelessWindowHint) 
     self.show() 


if __name__ == '__main__': 
    app = QtWidgets.QApplication(sys.argv) 

    window = mainUI() 

    sys.exit(app.exec_()) 

EDIT

さてさて、このコードは動作しますが、正直に言うが、私は、なぜ100％わかりません。

import sys 
from PyQt5 import QtGui, QtCore, QtWidgets 
from PyQt5.QtCore import Qt, QPoint, QRect, QSize 
from PyQt5.QtGui import QScreen 
from PyQt5.QtWidgets import QApplication, QLabel, QRubberBand, QAction 

class KpeWindow(QtWidgets.QLabel): 
    def __init__(self, parent=None): 
     QtWidgets.QLabel.__init__(self,parent) 
     main = QtWidgets.QVBoxLayout(self) 
     self.selection = QtWidgets.QRubberBand(QtWidgets.QRubberBand.Rectangle, self) 

     # label = QLabel(self) 
     # label.setText('Test the keyPressEvent') 
     # main.addWidget(label) 

     # self.adjustSize() 
     # self.setLayout(main) 

    def keyPressEvent(self, event): 
     print(event.key()) 
     if event.key() == QtCore.Qt.Key_Return: 
      print('yay') 

     #QtWidgets.QMessageBox.warning(self, 'MDI', 'keyPressEvent') 
     self.parent().keyPressEvent(event) 


    def mousePressEvent(self, event): 
     ''' 
      Mouse is pressed. If selection is visible either set dragging mode (if close to border) or hide selection. 
      If selection is not visible make it visible and start at this point. 
     ''' 
     print(event) 
     if event.button() == QtCore.Qt.LeftButton: 

      position = QtCore.QPoint(event.pos()) 
      if self.selection.isVisible(): 
       # visible selection 
       if (self.upper_left - position).manhattanLength() < 20: 
        # close to upper left corner, drag it 
        self.mode = "drag_upper_left" 
       elif (self.lower_right - position).manhattanLength() < 20: 
        # close to lower right corner, drag it 
        self.mode = "drag_lower_right" 
       else: 
        # clicked somewhere else, hide selection 
        self.selection.hide() 
      else: 
       # no visible selection, start new selection 
       self.upper_left = position 
       self.lower_right = position 
       self.mode = "drag_lower_right" 
       self.selection.show() 

    def mouseMoveEvent(self, event): 
     ''' 
      Mouse moved. If selection is visible, drag it according to drag mode. 
     ''' 

     if self.selection.isVisible(): 
      # visible selection 
      if self.mode is "drag_lower_right": 
       self.lower_right = QtCore.QPoint(event.pos()) 
      elif self.mode is "drag_upper_left": 
       self.upper_left = QtCore.QPoint(event.pos()) 
      # update geometry 
      self.selection.setGeometry(QtCore.QRect(self.upper_left, self.lower_right).normalized()) 

class MainWindow(QtWidgets.QWidget): 
    def __init__(self): 
     super(MainWindow, self).__init__() 
     QtWidgets.QMainWindow.__init__(self) 
     #self.setWindowTitle('KeyPressEvent Test') 
     # main = QtWidgets.QVBoxLayout(self) 
     # child = KpeWindow(self) 
     # child.setFocusPolicy(Qt.StrongFocus) 
     # self.setFocusProxy(child) 
     # main.addWidget(child) 
     # child.setFocus(True) 

     layout = QtWidgets.QVBoxLayout(self) 

     label = KpeWindow(self) 
     pixmap = QScreen.grabWindow(app.primaryScreen(), app.desktop().winId()) 
     label.setPixmap(pixmap) 
     layout.addWidget(label) 
     #new 
     label.setFocusPolicy(Qt.StrongFocus) 
     self.setFocusProxy(label) 
     label.setFocus(True) 

     self.setLayout(layout) 

     geometry = app.desktop().availableGeometry() 

     self.setFixedSize(geometry.width(), geometry.height()) 


     # self.setWindowFlags(self.windowFlags() | Qt.FramelessWindowHint) 
     self.show() 

if __name__ == '__main__': 
    app = QApplication(sys.argv) 
    mainWin = MainWindow() 
    mainWin.show() 
    sys.exit(app.exec_()) 

Answer 1

あなたは、キーボードイベント取得するには、ラベルにset the focus policyする必要があります。答えを

class MyLabel(QtWidgets.QLabel): 

    def __init__(self, parent=None): 
     ... 
     self.setFocusPolicy(Qt.TabFocus)