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Merge two pieces of code

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  • SGaistS SGaist

    You did not import the module.

    J Offline
    J Offline
    john_hobbyist
    wrote on last edited by
    #49

    @SGaist: Something else than these?

    import os
    import sys
    import cv2
    from matplotlib.figure import Figure
    import numpy as np
    from PyQt5.QtGui import QIcon
    from PyQt5.QtWidgets import (QMainWindow, QApplication, QWidget,QAction, QFileDialog, QMenu, 
                                 QToolBar, QHBoxLayout, QTreeView, QFileSystemModel, QSizePolicy, 
                                 QMessageBox)
    from PyQt5.QtCore import Qt, QDir, QStandardPaths, QFileInfo
    import matplotlib.backends.backend_qt5agg as mpl_qt
    from PyQt5 import QtWidgets, QtCore
    from PyQt5.QtGui import QPixmap
    
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    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #50

      You import QPixmap directly so use it directly as well.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      J 1 Reply Last reply
      1
      • SGaistS SGaist

        You import QPixmap directly so use it directly as well.

        J Offline
        J Offline
        john_hobbyist
        wrote on last edited by
        #51

        @SGaist: I used this:

        screen_pixmap = QPixmap.grabWidget(app.desktop())
        

        I get this:

        Traceback (most recent call last):
          File "code_2.py", line 335, in <module>
            screen_pixmap = QPixmap.grabWidget(app.desktop()) 
        AttributeError: type object 'QPixmap' has no attribute 'grabWidget'
        Segmentation fault (core dumped)
        
        

        I followed this: https://stackoverflow.com/questions/29260686/qpixmap-has-no-attribute-grabwindow

        and I changed to this:

        screen_pixmap = QScreen.grabWidget(app.desktop())
        

        and I get this:

        Traceback (most recent call last):
          File "code_2.py", line 336, in <module>
            screen_pixmap = QScreen.grabWidget(app.desktop()) 
        AttributeError: type object 'QScreen' has no attribute 'grabWidget'
        Segmentation fault (core dumped)
        

        When I changed to this:

        screen_pixmap = QScreen.grabWindow(app.desktop().winId())
        

        I get this:

        Must construct a QApplication first.
        Traceback (most recent call last):
          File "code_2.py", line 337, in <module>
            screen_pixmap = QScreen.grabWindow(app.desktop().winId()) 
        AttributeError: 'NoneType' object has no attribute 'winId'
        Segmentation fault (core dumped)
        

        When I changed to this:

        screen_pixmap = QScreen.grabWindow(app.desktop())
        

        I get this:

        Must construct a QApplication first.
        Traceback (most recent call last):
          File "code_2.py", line 338, in <module>
            screen_pixmap = QScreen.grabWindow(app.desktop())#.winId()) 
        TypeError: grabWindow(self, PyQt5.sip.voidptr, x: int = 0, y: int = 0, width: int = -1, height: int = -1): first argument of unbound method must have type 'QScreen'
        Segmentation fault (core dumped)
        

        I didn't find something about this...

        JonBJ 1 Reply Last reply
        0
        • J john_hobbyist

          @SGaist: I used this:

          screen_pixmap = QPixmap.grabWidget(app.desktop())
          

          I get this:

          Traceback (most recent call last):
            File "code_2.py", line 335, in <module>
              screen_pixmap = QPixmap.grabWidget(app.desktop()) 
          AttributeError: type object 'QPixmap' has no attribute 'grabWidget'
          Segmentation fault (core dumped)
          
          

          I followed this: https://stackoverflow.com/questions/29260686/qpixmap-has-no-attribute-grabwindow

          and I changed to this:

          screen_pixmap = QScreen.grabWidget(app.desktop())
          

          and I get this:

          Traceback (most recent call last):
            File "code_2.py", line 336, in <module>
              screen_pixmap = QScreen.grabWidget(app.desktop()) 
          AttributeError: type object 'QScreen' has no attribute 'grabWidget'
          Segmentation fault (core dumped)
          

          When I changed to this:

          screen_pixmap = QScreen.grabWindow(app.desktop().winId())
          

          I get this:

          Must construct a QApplication first.
          Traceback (most recent call last):
            File "code_2.py", line 337, in <module>
              screen_pixmap = QScreen.grabWindow(app.desktop().winId()) 
          AttributeError: 'NoneType' object has no attribute 'winId'
          Segmentation fault (core dumped)
          

          When I changed to this:

          screen_pixmap = QScreen.grabWindow(app.desktop())
          

          I get this:

          Must construct a QApplication first.
          Traceback (most recent call last):
            File "code_2.py", line 338, in <module>
              screen_pixmap = QScreen.grabWindow(app.desktop())#.winId()) 
          TypeError: grabWindow(self, PyQt5.sip.voidptr, x: int = 0, y: int = 0, width: int = -1, height: int = -1): first argument of unbound method must have type 'QScreen'
          Segmentation fault (core dumped)
          

          I didn't find something about this...

          JonBJ Online
          JonBJ Online
          JonB
          wrote on last edited by
          #52

          @john_hobbyist
          The last answer in the stackoverflow link you quoted claims to have "Full example for PyQt5". Did you at least try that? Not your own version of it, just exactly the example given there.

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          0
          • J Offline
            J Offline
            john_hobbyist
            wrote on last edited by john_hobbyist
            #53

            @JonB Yes, it works, but I try different rubberband code...please look at my first posts up...

            1 Reply Last reply
            0
            • J Offline
              J Offline
              john_hobbyist
              wrote on last edited by
              #54
              This post is deleted!
              1 Reply Last reply
              0
              • J Offline
                J Offline
                john_hobbyist
                wrote on last edited by
                #55

                What modifications should I do in the command?

                1 Reply Last reply
                0
                • J Offline
                  J Offline
                  john_hobbyist
                  wrote on last edited by john_hobbyist
                  #56

                  I am trying to modify/incorporate from the correct running code from the stackoverflow that @JonB suggested. With this:

                  screen_pixmap = QScreen.grabWindow(app.primaryScreen(),QApplication.desktop().winId()).save(filename, 'png')
                  

                  I get this:

                  Must construct a QApplication first.
                  Traceback (most recent call last):
                    File "code_2.py", line 340, in <module>
                      screen_pixmap = QScreen.grabWindow(app.primaryScreen(),QApplication.desktop().winId()).save(filename, 'png')
                  AttributeError: 'NoneType' object has no attribute 'winId'
                  Segmentation fault (core dumped)
                  

                  And with this

                  screen_pixmap = QScreen.grabWindow(app.primaryScreen(),QApplication.desktop()).save(filename, 'png')
                  

                  I get again this:

                   construct a QApplication first.
                  Traceback (most recent call last):
                    File "code_2.py", line 341, in <module>
                      screen_pixmap = QScreen.grabWindow(app.primaryScreen(),QApplication.desktop()).save(filename, 'png')
                  TypeError: grabWindow(self, PyQt5.sip.voidptr, x: int = 0, y: int = 0, width: int = -1, height: int = -1): first argument of unbound method must have type 'QScreen'
                  Segmentation fault (core dumped)
                  
                  
                  

                  in which I cannot find a reliable solution from google/stackoverflow...

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                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #57

                    @john_hobbyist said in Merge two pieces of code:

                    grabWindow

                    This is not a class method, you need an instance of QScreen.

                    In what way is that related to your original QRubberBand question ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    J SGaistS 2 Replies Last reply
                    1
                    • SGaistS SGaist

                      @john_hobbyist said in Merge two pieces of code:

                      grabWindow

                      This is not a class method, you need an instance of QScreen.

                      In what way is that related to your original QRubberBand question ?

                      J Offline
                      J Offline
                      john_hobbyist
                      wrote on last edited by
                      #58

                      @SGaist Yes, I try to use stackoverflow code that has an approach for what I am trying so many days to do. Please look previous posts. And these are errors...

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                      0
                      • SGaistS SGaist

                        @john_hobbyist said in Merge two pieces of code:

                        grabWindow

                        This is not a class method, you need an instance of QScreen.

                        In what way is that related to your original QRubberBand question ?

                        SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #59

                        I already answered to the errors you are getting.

                        @SGaist said in Merge two pieces of code:

                        This is not a class method, you need an instance of QScreen.

                        You really should read the documentation of the classes you are using rather than just blindingly copy paste.

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        3
                        • J Offline
                          J Offline
                          john_hobbyist
                          wrote on last edited by
                          #60

                          I have been making many changes all day. The rest of the application runs, but nowhere I can see a rubberband rectangle in order to select/printscreen an area. I get these warnings though...I am searching it, but any idea would help...

                          QWidget::paintEngine: Should no longer be called
                          QPainter::begin: Paint device returned engine == 0, type: 1
                          QPainter::end: Painter not active, aborted
                          
                          1 Reply Last reply
                          0
                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #61

                            Where exactly are you doing custom painting ?

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                            1 Reply Last reply
                            1
                            • J Offline
                              J Offline
                              john_hobbyist
                              wrote on last edited by john_hobbyist
                              #62

                              I don't know! This is the modified last part of my code:

                              if __name__ == "__main__":
                                  app = QApplication(sys.argv)
                                  icon = QIcon(os.path.join(selfDir, '_static', 'orthoview.ico'))
                              
                                  app.setWindowIcon(icon)
                                  from PyQt5.QtWidgets import *
                                  data = take_screenshot()
                                  window = QWidget()
                                  layout = QtWidgets.QVBoxLayout(window) 
                              
                                  pixmap = QPixmap()
                                  pixmap.loadFromData(data)
                                  label = QtWidgets.QLabel()
                                  label.setPixmap(pixmap)
                                  
                                  layout.addWidget(label)         
                                  geometry = app.desktop().availableGeometry()        
                                  window.setFixedSize(geometry.width(), geometry.height())        
                              
                                  window = OrthoView()
                                  window.show()
                                  sys.exit(app.exec_())
                              

                              I used/modified this:

                              import sys
                              
                              from PySide2 import QtCore, QtGui, QtWidgets
                              
                              
                              def take_screenshot():
                                  from PyQt5 import QtCore as pyqt5c
                                  from PyQt5 import QtWidgets as pyqt5w
                              
                                  screen = pyqt5w.QApplication.primaryScreen()
                                  winid = pyqt5w.QApplication.desktop().winId()
                                  pixmap = screen.grabWindow(winid)
                              
                                  ba = pyqt5c.QByteArray()
                                  buff = pyqt5c.QBuffer(ba)
                                  pixmap.save(buff, "PNG")
                                  return ba.data()
                              
                              
                              if __name__ == "__main__":
                                  app = QtWidgets.QApplication(sys.argv)
                              
                                  data = take_screenshot()
                              
                                  pixmap = QtGui.QPixmap()
                                  pixmap.loadFromData(data)
                              
                                  label = QtWidgets.QLabel()
                                  label.setPixmap(pixmap)
                                  label.show()
                              
                                  sys.exit(app.exec_())
                              

                              (source: https://stackoverflow.com/questions/59118938/type-error-when-calling-qscreen-grabwindow)

                              JonBJ 1 Reply Last reply
                              0
                              • J john_hobbyist

                                I don't know! This is the modified last part of my code:

                                if __name__ == "__main__":
                                    app = QApplication(sys.argv)
                                    icon = QIcon(os.path.join(selfDir, '_static', 'orthoview.ico'))
                                
                                    app.setWindowIcon(icon)
                                    from PyQt5.QtWidgets import *
                                    data = take_screenshot()
                                    window = QWidget()
                                    layout = QtWidgets.QVBoxLayout(window) 
                                
                                    pixmap = QPixmap()
                                    pixmap.loadFromData(data)
                                    label = QtWidgets.QLabel()
                                    label.setPixmap(pixmap)
                                    
                                    layout.addWidget(label)         
                                    geometry = app.desktop().availableGeometry()        
                                    window.setFixedSize(geometry.width(), geometry.height())        
                                
                                    window = OrthoView()
                                    window.show()
                                    sys.exit(app.exec_())
                                

                                I used/modified this:

                                import sys
                                
                                from PySide2 import QtCore, QtGui, QtWidgets
                                
                                
                                def take_screenshot():
                                    from PyQt5 import QtCore as pyqt5c
                                    from PyQt5 import QtWidgets as pyqt5w
                                
                                    screen = pyqt5w.QApplication.primaryScreen()
                                    winid = pyqt5w.QApplication.desktop().winId()
                                    pixmap = screen.grabWindow(winid)
                                
                                    ba = pyqt5c.QByteArray()
                                    buff = pyqt5c.QBuffer(ba)
                                    pixmap.save(buff, "PNG")
                                    return ba.data()
                                
                                
                                if __name__ == "__main__":
                                    app = QtWidgets.QApplication(sys.argv)
                                
                                    data = take_screenshot()
                                
                                    pixmap = QtGui.QPixmap()
                                    pixmap.loadFromData(data)
                                
                                    label = QtWidgets.QLabel()
                                    label.setPixmap(pixmap)
                                    label.show()
                                
                                    sys.exit(app.exec_())
                                

                                (source: https://stackoverflow.com/questions/59118938/type-error-when-calling-qscreen-grabwindow)

                                JonBJ Online
                                JonBJ Online
                                JonB
                                wrote on last edited by JonB
                                #63

                                @john_hobbyist
                                Maybe I misunderstand, but you call take_screenshot()as the very first thing you do, before you have created or shown anything at all? What would you expect from that, logically?

                                EDIT
                                OK, you're trying to screenshot what's already on the screen? Sorry, I misunderstood. Still seems very early but may be correct. Ignore this post if it is :)

                                I'm not sure I see anything here to do with custom painting. Do you use a debugger? Do you step through your code to find out where your problems come from? We need you to (learn to) do that, people here don't know where the errors come in your code.

                                J 1 Reply Last reply
                                1
                                • JonBJ JonB

                                  @john_hobbyist
                                  Maybe I misunderstand, but you call take_screenshot()as the very first thing you do, before you have created or shown anything at all? What would you expect from that, logically?

                                  EDIT
                                  OK, you're trying to screenshot what's already on the screen? Sorry, I misunderstood. Still seems very early but may be correct. Ignore this post if it is :)

                                  I'm not sure I see anything here to do with custom painting. Do you use a debugger? Do you step through your code to find out where your problems come from? We need you to (learn to) do that, people here don't know where the errors come in your code.

                                  J Offline
                                  J Offline
                                  john_hobbyist
                                  wrote on last edited by
                                  #64

                                  @JonB Yes, I am trying to find the errors!

                                  JonBJ 1 Reply Last reply
                                  0
                                  • J john_hobbyist

                                    @JonB Yes, I am trying to find the errors!

                                    JonBJ Online
                                    JonBJ Online
                                    JonB
                                    wrote on last edited by
                                    #65

                                    @john_hobbyist
                                    So, nicely, do you use some Python debugger to execute your code?

                                    J 1 Reply Last reply
                                    1
                                    • JonBJ JonB

                                      @john_hobbyist
                                      So, nicely, do you use some Python debugger to execute your code?

                                      J Offline
                                      J Offline
                                      john_hobbyist
                                      wrote on last edited by
                                      #66

                                      @JonB I write the code on a simple text editor and run it on Ubuntu's command line..

                                      JonBJ 1 Reply Last reply
                                      0
                                      • J john_hobbyist

                                        @JonB I write the code on a simple text editor and run it on Ubuntu's command line..

                                        JonBJ Online
                                        JonBJ Online
                                        JonB
                                        wrote on last edited by JonB
                                        #67

                                        @john_hobbyist
                                        Yeah, that's not a great starting point :) That means you have to put print() statements everywhere if you want to know what's going on.

                                        Unfortunately so far as I know Qt Creator still offers nothing fur running/debugging Python. (Has this changed?) I used PyCharm as editor and debugger for my Python coding, it was great, but not integrated with Qt Creator if you are designing UI files there. Else, I don't know but running under pdb might be better than nothing at all.

                                        1 Reply Last reply
                                        1
                                        • J Offline
                                          J Offline
                                          john_hobbyist
                                          wrote on last edited by john_hobbyist
                                          #68

                                          Yes, I work with "prints" inside code.... So here how things are: The program goes to the below methods (source on my previous posts) , but it does not displays the rectangle so it does not call screenshot...Any ideas?

                                          Sorry! Updated the correct code!

                                              def mousePressEvent(self, event):
                                                  print("56")
                                                  '''
                                                      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:
                                                      print("57")
                                          
                                                      position = QtCore.QPoint(event.pos())
                                                      print("58")
                                                      if self.selection.isVisible():
                                                          print("59")
                                                          # visible selection
                                                          if (self.upper_left - position).manhattanLength() < 20:
                                                              print("60")
                                                              # close to upper left corner, drag it
                                                              self.mode = "drag_upper_left"
                                                              print("61")
                                                          elif (self.lower_right - position).manhattanLength() < 20:
                                                              print("62")
                                                              # close to lower right corner, drag it
                                                              self.mode = "drag_lower_right"
                                                              print("63")
                                                          else:
                                                              print("64")
                                                              # clicked somewhere else, hide selection
                                                              self.selection.hide()
                                                              print("65")
                                                      else:
                                                          # no visible selection, start new selection
                                                          print("66")
                                                          self.upper_left = position
                                                          print("67")
                                                          self.lower_right = position
                                                          print("68")
                                                          self.mode = "drag_lower_right"
                                                          print("69")
                                                          self.selection.show()
                                                          print("70")
                                          
                                              def mouseMoveEvent(self, event):
                                                  print("71")
                                                  '''
                                                      Mouse moved. If selection is visible, drag it according to drag mode.
                                                  '''
                                                  if self.selection.isVisible():
                                                      print("72")
                                                      # visible selection
                                                      if self.mode == "drag_lower_right":
                                                          print("73")
                                                          self.lower_right = QtCore.QPoint(event.pos())
                                                          print("74")
                                                      elif self.mode == "drag_upper_left":
                                                          print("75")
                                                          self.upper_left = QtCore.QPoint(event.pos())
                                                          print("76")
                                                      # update geometry
                                                      self.selection.setGeometry(QtCore.QRect(self.upper_left, self.lower_right).normalized())
                                                      print("77")
                                          
                                          def take_screenshot():
                                              print("205")
                                              from PyQt5 import QtCore as pyqt5c
                                              print("206")
                                              from PyQt5 import QtWidgets as pyqt5w
                                              print("207")
                                              screen = pyqt5w.QApplication.primaryScreen()
                                              print("208")
                                              winid = pyqt5w.QApplication.desktop().winId()
                                              print("209")
                                              pixmap = screen.grabWindow(winid)
                                              print("210")
                                          
                                              ba = pyqt5c.QByteArray()
                                              print("211")
                                              buff = pyqt5c.QBuffer(ba)
                                              print("212")
                                              pixmap.save(buff, "PNG")
                                              print("213")
                                              return ba.data()
                                          
                                          if __name__ == "__main__":
                                              print("214")
                                              app = QApplication(sys.argv)
                                              print("215")
                                              icon = QIcon(os.path.join(selfDir, '_static', 'orthoview.ico'))
                                              print("216")
                                              app.setWindowIcon(icon)
                                              print("217")
                                              from PyQt5.QtWidgets import *
                                              print("218")
                                              data = take_screenshot()
                                              print("219")
                                              window = QWidget()
                                              print("220")
                                              layout = QtWidgets.QVBoxLayout(window)
                                              print("221")
                                              pixmap = QPixmap()
                                              print("222")
                                              pixmap.loadFromData(data)
                                              print("223")
                                              label = QtWidgets.QLabel()
                                              print("224")
                                              label.setPixmap(pixmap)
                                              print("225")
                                              
                                              layout.addWidget(label)     
                                              print("226")
                                              geometry = app.desktop().availableGeometry()        
                                              print("227")
                                              window.setFixedSize(geometry.width(), geometry.height())       
                                              print("228")
                                              window = OrthoView()
                                              print("229")
                                              window.show()
                                              print("230")
                                              sys.exit(app.exec_())
                                          
                                          JonBJ 1 Reply Last reply
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