PyQt 拖入¶
更新日期 2017-09-19
- 2017-09-19 创建文档
PyQt支持拖入功能。比如拖入文件或者一段文本。
拖入文本¶
定义了一个label继承自QLabel，初始化时设置允许拖入。
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMainWindow, QApplication, QListWidget, QAbstractItemView
class CustomLabel(QLabel):
def __init__(self, title, parent):
super().__init__(title, parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasFormat('text/plain'):
e.accept()
else:
e.ignore()
def dropEvent(self, e):
self.setText(e.mimeData().text())
拖入文件，读取文件路径¶
这里继承了QLabel。Ui_MainWindow是用designer画出来的界面。
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMainWindow, QApplication, QListWidget, QAbstractItemView
class LabMainWindow(QMainWindow):
def __init__(self):
super(LabMainWindow, self).__init__()
self.ma = Ui_MainWindow()
self.ma.setupUi(self)
self.drag_in_widget = DragInWidget("Drag in", self)
def _init_ui(self):
self.drag_in_widget.move(0, 0)
class DragInWidget(QLabel):
def __init__(self, title, parent):
super().__init__(title, parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasUrls():
e.accept()
else:
e.ignore()
def dropEvent(self, e):
for url in e.mimeData().urls():
path = url.toLocalFile()
if os.path.isfile(path):
print(path)
拖入事件监听¶
QtWidgets.QFrame监听拖入事件¶
监听到有效拖动事件后，利用QtCore.pyqtSignal把信息传递出去
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMainWindow, QApplication, QListWidget, QAbstractItemView
class DragInWidget(QtWidgets.QFrame):
""" Drag files to this widget """
s_content = QtCore.pyqtSignal(str) # emit file path
def __init__(self, parent):
super(DragInWidget, self).__init__(parent)
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
if e.mimeData().hasUrls():
e.accept()
else:
e.ignore()
def dropEvent(self, e):
for url in e.mimeData().urls():
path = url.toLocalFile()
if os.path.isfile(path):
self.s_content.emit(path)
print(path)
这个Frame可以覆盖在其他控件上面时，会拦截操作
QListWidget拖入事件¶
向QListWidget拖入文件，获取文件路径
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMainWindow, QApplication, QListWidget, QAbstractItemView
class DragInWidget(QListWidget):
""" Drag files to this widget """
s_content = QtCore.pyqtSignal(str) # emit file path
def __init__(self, parent):
super(DragInWidget, self).__init__(parent)
self.setAcceptDrops(True)
self.setDragDropMode(QAbstractItemView.InternalMove)
def dragEnterEvent(self, e):
if e.mimeData().hasUrls():
e.accept()
else:
e.ignore()
def dropEvent(self, e):
for url in e.mimeData().urls():
path = url.toLocalFile()
if os.path.isfile(path):
self.s_content.emit(path)
print(path)
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