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capturePointerDownWheelFilter.py
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capturePointerDownWheelFilter.py
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from PyQt5 import QtCore
from PyQt5.QtCore import QObject
from PyQt5.QtGui import QMouseEvent
from PyQt5.QtWidgets import QUndoCommand
from app import MusicMakerApp
from pointer import PointerEvent, PointerWheelEvent
class VolumeOperation(object):
def __init__(self, widget):
super(VolumeOperation, self).__init__()
self.widget = widget
def apply(self, event):
self.widget.adjustVolume(event.pointerAngleDelta * 8)
return True
class CapturePointerWheelEventFilter(QObject):
def __init__(self, qapp):
super(CapturePointerWheelEventFilter, self).__init__()
self.qapp = qapp
self.operations = dict()
def eventFilter(self, obj, event):
if type(event) is PointerEvent:
event = event # type: PointerEvent
pos = event.pointer.pos
if event.button() & QtCore.Qt.RightButton:
if event.type() == QMouseEvent.MouseButtonPress:
print("start capture")
widget = event.target
if (not widget or widget is self.qapp or type(widget) == MusicMakerApp):
return False
self.operations[event.pointer] = VolumeOperation(widget)
return True
if event.type() == QMouseEvent.MouseButtonRelease:
print("capture done")
operation = self.operations.get(event.pointer, None)
if operation:
self.operations.pop(event.pointer)
return True
elif event.type() == QMouseEvent.MouseMove:
operation = self.operations.get(event.pointer, None)
if operation:
# captured
return True
elif type(event) is PointerWheelEvent:
operation = self.operations.get(event.pointer, None)
if operation:
operation.apply(event)
return True
return False