PyQT4：将文件拖放到QListWidget中 [英] PyQT4: Drag and drop files into QListWidget
问题描述
我已经编写了OCR书籍扫描的东西（通过阅读页码重新命名页面），并从基本的CLI Python脚本切换到GUI。
I've been coding a OCR book scanning thing (it renames pages by reading the page number), and have switched to a GUI from my basic CLI Python script.
我正在使用PyQT4，并在拖放时查看了大量文档，但没有运气。它只是拒绝拿这些文件！我正在使用这些文章来进行UI设计：
I'm using PyQT4 and looked at a ton of documents on drag and drop, but no luck. It just refuses to take those files! I was using these to articles for my UI design:
http://zetcode.com/tutorials/pyqt4/dragdrop/
我注意到有一个TON的方法来设置一个PyQT4 GUI。
I noticed that there are a TON of ways to setup a PyQT4 GUI. Which one works the best?
哎呀，这里是项目的源代码。
Oops, here's the source code for the project.
主要脚本：
import sys
from PyQt4 import QtCore
from PyQt4 import QtGui
from PyQt4.QtGui import QListWidget
from layout import Ui_window
class StartQT4(QtGui.QMainWindow):
def __init__(self, parent = None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_window()
self.ui.setupUi(self)
QtCore.QObject.connect(self.ui.listWidget, QtCore.SIGNAL("dropped"), self.picture_dropped)
def picture_dropped(self, l):
for url in l:
if os.path.exists(url):
picture = Image.open(url)
picture.thumbnail((72, 72), Image.ANTIALIAS)
icon = QIcon(QPixmap.fromImage(ImageQt.ImageQt(picture)))
item = QListWidgetItem(os.path.basename(url)[:20] + "...", self.pictureListWidget)
item.setStatusTip(url)
item.setIcon(icon)
class DragDropListWidget(QListWidget):
def __init__(self, type, parent = None):
super(DragDropListWidget, self).__init__(parent)
self.setAcceptDrops(True)
self.setIconSize(QSize(72, 72))
def dragEnterEvent(self, event):
if event.mimeData().hasUrls:
event.accept()
else:
event.ignore()
def dragMoveEvent(self, event):
if event.mimeData().hasUrls:
event.setDropAction(Qt.CopyAction)
event.accept()
else:
event.ignore()
def dropEvent(self, event):
if event.mimeData().hasUrls:
event.setDropAction(Qt.CopyAction)
event.accept()
l = []
for url in event.mimeData().urls():
l.append(str(url.toLocalFile()))
self.emit(SIGNAL("dropped"), l)
else:
event.ignore()
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = StartQT4()
myapp.show()
sys.exit(app.exec_())
和UI文件...
# Form implementation generated from reading ui file 'layout.ui'
#
# Created: Thu Nov 11 00:22:52 2010
# by: PyQt4 UI code generator 4.8.1
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
_fromUtf8 = lambda s: s
class Ui_window(object):
def setupUi(self, window):
window.setObjectName(_fromUtf8("window"))
window.resize(543, 402)
window.setAcceptDrops(True)
self.centralwidget = QtGui.QWidget(window)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.listWidget = QtGui.QListWidget(self.centralwidget)
self.listWidget.setProperty(_fromUtf8("cursor"), QtCore.Qt.SizeHorCursor)
self.listWidget.setAcceptDrops(True)
self.listWidget.setObjectName(_fromUtf8("listWidget"))
self.verticalLayout.addWidget(self.listWidget)
window.setCentralWidget(self.centralwidget)
self.retranslateUi(window)
QtCore.QMetaObject.connectSlotsByName(window)
def retranslateUi(self, window):
window.setWindowTitle(QtGui.QApplication.translate("window", "PyNamer OCR", None, QtGui.QApplication.UnicodeUTF8))
感谢任何人可以帮助！
推荐答案
您使用的代码一个例子似乎工作正常，看起来很干净。根据您的评论，您的列表小部件尚未初始化;这应该是您问题的根本原因。我已经简化了你的代码，在Ubuntu 10.04LTS上尝试了一下，它工作正常。我的代码列在下面，看看它是否也会。您应该能够将文件拖放到列表窗口小部件中;一旦删除，添加一个新项目显示图像和图像的文件名。
The code you're using as an example seem to work fine and looks quite clean. According to your comment your list widget is not getting initialized; this should be the root cause of your issue. I've simplified your code a bit a tried it on my Ubuntu 10.04LTS and it worked fine. My code is listed below, see if it would for you also. You should be able to drag and drop a file into the list widget; once it's dropped a new item is added showing the image and image's file name.
import sys
import os
from PyQt4 import QtGui, QtCore
class TestListView(QtGui.QListWidget):
def __init__(self, type, parent=None):
super(TestListView, self).__init__(parent)
self.setAcceptDrops(True)
self.setIconSize(QtCore.QSize(72, 72))
def dragEnterEvent(self, event):
if event.mimeData().hasUrls:
event.accept()
else:
event.ignore()
def dragMoveEvent(self, event):
if event.mimeData().hasUrls:
event.setDropAction(QtCore.Qt.CopyAction)
event.accept()
else:
event.ignore()
def dropEvent(self, event):
if event.mimeData().hasUrls:
event.setDropAction(QtCore.Qt.CopyAction)
event.accept()
links = []
for url in event.mimeData().urls():
links.append(str(url.toLocalFile()))
self.emit(QtCore.SIGNAL("dropped"), links)
else:
event.ignore()
class MainForm(QtGui.QMainWindow):
def __init__(self, parent=None):
super(MainForm, self).__init__(parent)
self.view = TestListView(self)
self.connect(self.view, QtCore.SIGNAL("dropped"), self.pictureDropped)
self.setCentralWidget(self.view)
def pictureDropped(self, l):
for url in l:
if os.path.exists(url):
print(url)
icon = QtGui.QIcon(url)
pixmap = icon.pixmap(72, 72)
icon = QtGui.QIcon(pixmap)
item = QtGui.QListWidgetItem(url, self.view)
item.setIcon(icon)
item.setStatusTip(url)
def main():
app = QtGui.QApplication(sys.argv)
form = MainForm()
form.show()
app.exec_()
if __name__ == '__main__':
main()
希望这有助于，
这篇关于PyQT4：将文件拖放到QListWidget中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
