Generating a MouseEvent and using Qt_MouseButton

Comments

• cgelinek_radlogic

  May 2015 edited May 2015

  Hi Dave,

  This code actually works under Windows 7, using KLayout version 0.24-python-eval which uses Ruby 2.1.3 and Qt 4.8.2.

  As far as I know, this was changed in the transition from 0.23 to 0.24. The 0.23 version seems to use integers as Qt flags, so for example the following code works in 0.23.10:

  RBA::QMessageBox::Ok      # returns Ok (1024)
  RBA::QMessageBox::Cancel  # returns Cancel (4194304)
  OK = 1024
  CANCEL = 4194304
  RBA::QMessageBox::information(nil, "Title", "Text", OK | CANCEL)
  

  In 0.24, this was improved to the following:

  OK = RBA::QMessageBox::Ok          # returns Ok (1024)
  CANCEL = RBA::QMessageBox::Cancel  # returns Cancel (4194304)
  RBA::QMessageBox::information(nil, "Title", "Text", OK | CANCEL)
  

  Strangely enough, trying to convert your example to 0.23 using integers

  RBA::QEvent::MouseButtonPress        # returns MouseButtonPress (2)
  RBA::Qt_MouseButton::LeftButton      # returns LeftButton (1)
  RBA::Qt_KeyboardModifier::NoModifier # returns NoModifier (0)
  
  MOUSE_BUTTON_PRESS = 2
  LEFT_BUTTON = 1
  NO_MODIFIER = 0
  
  point = RBA::QPoint.new(123, 456)
  mouse_click = RBA::QMouseEvent.new( MOUSE_BUTTON_PRESS, point, LEFT_BUTTON, LEFT_BUTTON, NO_MODIFIER)
  

  ...didn't work for me, I got a RuntimeError: Unexpected object type (expected argument of class QEvent_Type, got Fixnum) in QMouseEvent::new.

  Maybe there is a clue in the Qt Binding documentation, but I would recommend upgrading to 0.24 as this is probably going to become standard eventually.

  Regards, Chris
• cgelinek_radlogic

  May 2015 edited May 2015

  Ok, seems like I didn't try hard enough. This hybrid worked under 0.23.10:

  point = RBA::QPoint.new(123, 456)
  LEFT_BUTTON = 1
  NO_MODIFIER = 0
  mouse_click = RBA::QMouseEvent.new( RBA::QEvent::MouseButtonPress, point, RBA::Qt_MouseButton::LeftButton, LEFT_BUTTON, NO_MODIFIER)
  

  Strange. Still, I'd move to 0.24 if possible.

  Regards, Chris
• davei

  May 2015 edited May 2015

  Thanks Chris.
  This got me out of a quagmire. Your QMouseEvent.new() invocation worked in my installation.

  I've taken note of your comments about versions. I can recompile a later version of KLayout,
  but moving Ruby and Qt are problems to change in my company environment.

  I really appreciate your help.

  Dave
• Matthias

  May 2015 edited May 2015

  Hi Dave, hi Chris,

  I am sorry for that confusion. I have mentioned the reason in a different thread: QFlags are classes in 0.24 and no longer mapped to integers. That enables a syntax close to C++ and all the features that QFlags offers, but lacking the backward compatibility. This is because there is either a class or an integer argument. There is no implicit translation of integers to QFlags classes yet.

  Seeing the problems this causes, I consider hardcoding a backward-compatible data path.

  Thanks for bringing this up.

  Matthias