PyQt5实现让QScrollArea支持鼠标拖动的操作方法

如下所示：

#!/usr/bin/evn python3
# -*- coding: utf-8 -*-
 
import sys
from pyqt5.qtwidgets import (qapplication, qwidget, qscrollarea, qlabel)
from pyqt5.qtcore import qevent
 
 
class testwindow(qwidget):
	def __init__(self):
		super(testwindow, self).__init__()
		self.resize(800, 600)
		self.move(0, 0)
		# self.setmousetracking(false)
		self.last_time_move = 0
		self.initui()
 
	def initui(self):
		self.central_widget = qwidget(self)
 
		self.scroll_area = qscrollarea(self)
		self.scroll_area.setgeometry(0, 0, 400, 400)
		self.scroll_area.setwidgetresizable(true)
		self.scroll_bar = self.scroll_area.verticalscrollbar()
 
		self.scroll_contents = qwidget()
		self.scroll_contents.setgeometry(0, 0, 400, 800)
		self.scroll_contents.setminimumsize(380, 1000)
 
		self.label_1 = qlabel(self.scroll_contents)
		self.label_1.move(50, 100)
		self.label_1.settext("helloryan")
 
		self.label_2 = qlabel(self.scroll_contents)
		self.label_2.move(50, 200)
		self.label_2.settext("你好")
 
		self.label_3 = qlabel(self.scroll_contents)
		self.label_3.move(50, 300)
		self.label_3.settext("-----------")
 
		self.label_4 = qlabel(self.scroll_contents)
		self.label_4.move(50, 400)
		self.label_4.settext("542543255235432543252")
 
		self.label_5 = qlabel(self.scroll_contents)
		self.label_5.move(50, 500)
		self.label_5.settext("5432543262542")
 
		self.label_6 = qlabel(self.scroll_contents)
		self.label_6.move(50, 600)
		self.label_6.settext("4325432532")
 
		self.scroll_area.setwidget(self.scroll_contents)
		self.scroll_area.installeventfilter(self)
 
	# def mousemoveevent(self, event):
	# 	if event.pos().x() > 0 and event.pos().x() < 400 and event.pos().y() > 0 and event.pos().y() < 400:
	# 		if self.last_time_move == 0:
	# 			self.last_time_move = event.pos().y()
	#
	# 		distance = self.last_time_move - event.pos().y()
	# 		self.scroll_bar.setvalue(self.scroll_bar.value() + distance)
	#
	# 		self.last_time_move = event.pos().y()
	# 		print("move%d" % event.pos().y())
	#
	# def mousereleaseevent(self, event):
	# 	self.last_time_move = 0
	# 	print("up")
 
	def eventfilter(self, source, event):
		if event.type() == qevent.mousemove:
			print(event.pos().y())
			
			if self.last_time_move == 0:
				self.last_time_move = event.pos().y()
				
			distance = self.last_time_move - event.pos().y()
			self.scroll_bar.setvalue(self.scroll_bar.value() + distance)
			self.last_time_move = event.pos().y()
			
		elif event.type() == qevent.mousebuttonrelease:
			self.last_time_move = 0
		return qwidget.eventfilter(self, source, event)
 
 
if __name__ == "__main__":
	app = qapplication(sys.argv)
	test = testwindow()
	test.show()
	sys.exit(app.exec_())

以上这篇pyqt5实现让qscrollarea支持鼠标拖动的操作方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。