Thanks for the reply, Justin.
Oddly -- or maybe not, based on my code -- the drag-and-drop eventFilter
still doesn't seem to recognize either DragEnter or Drop.
If anyone has a chance to look at this chunk of code that I ripped out of
the rest of my code to simplify things, it's much appreciated. If I'm
missing something fundamental, it would be great to know that, too.
I've cobbled things together from disparate corners of the web, so maybe
I'm just not seeing something important.
import maya.cmds as mc
import maya.mel as mm
import maya.OpenMayaUI as omui
from Qt.QtCore import *
from Qt.QtGui import *
from Qt.QtWidgets import *
from maya.app.general.mayaMixin import MayaQWidgetBaseMixin,
MayaQWidgetDockableMixin
from shiboken2 import wrapInstance
import os
import sys
from pprint import pprint
# set global values for the main window
def getMayaWindow():
mayaMainWindowPtr = omui.MQtUtil.mainWindow()
return wrapInstance(long(mayaMainWindowPtr), QWidget)
class MainWindowFilter(QObject):
def eventFilter(self, receiver, event):
self.receiver = receiver
"""
if event.type() is QEvent.Enter:
print("ENTER EVENT, FOOL!")
self.mouse_button = QApplication.mouseButtons()
#event.accept()
return False
"""
if event.type() is QEvent.DragEnter:
print("DRAG ENTERED!")
event.accept()
"""
if e.mimeData().hasFormat('text/plain'):
event.accept()
else:
event.ignore()
"""
if event.type() is QEvent.Drop:
print("DROPPED")
library_w = event.source()
if self.mouse_button == Qt.LeftButton:
print 'you dropped the bomb.'
else:
print 'nothing dropped.'
return False
global filter
filter = MainWindowFilter()
class CreateMainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(CreateMainWindow, self).__init__(*args, **kwargs)
self.mayaMainWindow = getMayaWindow()
self.mayaMainWindow.setAcceptDrops(True)
self.mayaMainWindow.installEventFilter(filter)
self.initUI()
def initUI(self):
mainHBox = QHBoxLayout(self)
label1 = MyLabel(self)
mainHBox.addWidget(label1)
# Parent under main Maya window
self.setParent(self.mayaMainWindow)
self.setWindowFlags(Qt.Window)
#self.setObjectName('CreateMainWindow_611')
self.setWindowTitle('Drag This')
self.setGeometry(100, 100, 550, 350)
def closeEvent(self, e):
'''
Make sure the eventFilter is removed
'''
print 'closeEvent'
self.mayaMainWindow.removeEventFilter(filter)
return super(CreateMainWindow, self).closeEvent(e)
class MyLabel(QLabel):
def __init__(self, parent):
super(MyLabel, self).__init__(parent)
self.setStyleSheet("""
background-color: black;
color: white;
font: bold;
padding: 6px;
border-width: 2px;
border-style: solid;
border-radius: 16px;
border-color: white;
""")
def mouseMoveEvent(self, e):
print 'e.buttons() = {}'.format(e.buttons())
if e.buttons() != Qt.LeftButton:
print 'Left button not detected.'
return
else:
print 'Left button press detected.'
# grab the button to a pixmap
pixmap = QPixmap.grabWidget(self)
# write the relative cursor position to mime data
mimeData = QMimeData()
# simple string with 'x,y'
mimeData.setText('%d,%d' % (e.x(), e.y()))
# make a QDrag
drag = QDrag(self)
# put our MimeData
drag.setMimeData(mimeData)
# set its Pixmap
drag.setPixmap(pixmap)
# shift the Pixmap so that it coincides with the cursor position
drag.setHotSpot(e.pos())
# below makes the pixmap half transparent
painter = QPainter(pixmap)
painter.setCompositionMode(painter.CompositionMode_DestinationIn)
painter.fillRect(pixmap.rect(), QColor(0, 0, 0, 127))
painter.end()
mainWinDrag = QDrag(self)
dropAction = drag.start(Qt.MoveAction)
# start the drag operation
# exec_ will return the accepted action from dropEvent
#drag.exec_(Qt.DropAction.)
if dropAction == Qt.MoveAction:
print 'moved'
else:
print 'MoveAction = {}'.format(drag.exec_(Qt.MoveAction))
print 'copied'
def main():
ui = CreateMainWindow()
ui.show()
# ui.show(dockable=True, floating=True)
main()
On Wednesday, November 9, 2016 at 12:29:14 PM UTC-8, Justin Israel wrote:
>
>
>
> On Thu, Nov 10, 2016 at 6:21 AM Alec Fredericks <[email protected]
> <javascript:>> wrote:
>
>> Hi there,
>> I think I'm misunderstanding something fundamental about QT and Maya UI
>> interactions.
>> I've created a small PyQt window that contains some tabs and, in one of
>> my test tabs, I have a grid populated by a couple of custom QLabel widgets.
>> Those widgets are the bits I want to drag into the Maya viewport and, in
>> turn, execute some code when the drop is recognized.
>>
>> In my custom QLabel, I have a dragEnterEvent and mousePressEvent.
>>
>> For the main Maya window, I install an eventFilter that checks for
>> QEvent.Enter, DragEnter and Drop.
>>
>> The eventFilter only ever seems to fire off the QEvent.Enter code but
>> never DragEnter or Drop.
>>
>
> I would try not accepting the event + returning True in your block that
> handles QEvent.Enter. That indicates that you want to swallow the event and
> the viewport will never see it it to do any custom handling. Does it start
> working when you ditch that block or at least just return False? I have
> viewport code that looks similar to your DragEnter and Drop blocks.
>
> Also, your source label widgets shouldn't need a dragEnterEvent defined on
> them. That is for the case where they want to accept things dropped on them.
>
>
>>
>> Here's my eventFilter:
>>
>> def eventFilter(self, receiver, event):
>> self.receiver = receiver
>>
>> if event.type() is QEvent.Enter:
>> print("ENTERED, FOOL!")
>> self.mouse_button = QApplication.mouseButtons()
>> event.accept()
>> return True
>>
>> if event.type() is QEvent.DragEnter:
>> print("DRAG ENTERED!")
>> self.mouse_button = QApplication.mouseButtons()
>> event.accept()
>> return True
>>
>> if event.type() is QEvent.Drop:
>> print("DROPPED")
>> library_w = event.source()
>> if self.mouse_button == Qt.LeftButton:
>> print 'you dropped the bomb.'
>> return True
>> else:
>> print 'nothing dropped.'
>>
>> Is there something more I need to do to get DragEnter and Drop to
>> function in the eventFilter?
>>
>> Thanks,
>> Alec
>>
>>
>> --
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