drag
The data managed by the QMimeData object based on the QDrag class for MIME type-based drag-and-drop data transfer is associated with its corresponding MIME type.
The MimeData class function allows detection and use of the method's MIME type
| judgment function | Setting Functions | Get function | MIME type |
|---|---|---|---|
| hasText() | text() | setText() | text/plain |
| hasHtml() | html() | setHtml() | text/html |
| hasUrls() | urls() | setUrls() | text/uri-list |
| hasImage() | imageData() | setImageData() | image/* |
| hasColor() | colorData() | setColorData() | application/x-color |
Common Drag and Drop Events
| event | descriptive |
|---|---|
| DragEnterEvent | Triggered when a drag-and-drop control operation is performed and the mouse pointer enters the control. |
| DragMoveEvent | This event is triggered when a drag-and-drop operation is performed. |
| DragLeaveEvent | Triggered when a drag-and-drop control operation is performed and the mouse pointer leaves the control. |
| DropEvent | Fires when the drag-and-drop operation is released on the target control |
import sys
from import *
from import *
from import *
from import Qt
class Combo(QComboBox):
def __init__(self, title, parent):
super(Combo, self).__init__(parent)
(True)
def dragEnterEvent(self, e):
print(e)
if ().hasText():
()
else:
()
def dropEvent(self, e):
(().text())
class Example(QWidget):
def __init__(self):
super(Example, self).__init__()
()
def initUI(self):
lo = QFormLayout()
(QLabel("Please drag and drop the text on the left into the drop-down menu on the right."))
edit = QLineEdit()
(True)
com = Combo("Button", self)
(edit, com)
(lo)
("Simple Drag and Drop Example")
if __name__ == "__main__":
app = QApplication()
win = Example()
()
(app.exec_())
clipboard (computing)
The QClipboard class provides access to the system clipboard to copy and paste data between applications. It operates similarly to the QDrag class and uses similar data types.
The QApplication class has a static method clipboard() that returns a reference to the clipboard object. Any type of MimeData can be copied or pasted from the clipboard.
QClipboard common methods
| methodologies | descriptive |
|---|---|
| clear() | Clearing the contents of the clipboard |
| setImage() | Copying QImage objects to the clipboard |
| setMimeData() | Setting MIME data to the clipboard |
| setPixmap() | Copying Pixmap Objects from the Clipboard |
| setText() | Copying text from the clipboard |
| text() | Retrieving text from the clipboard |
Common signals in the QClipboard class
| code | hidden meaning |
|---|---|
| dataChanged | Triggered when the contents of the clipboard change |
import os
import sys
from import QMimeData
from import (QApplication, QDialog, QGridLayout, QLabel, QPushButton)
from import QPixmap
class Form(QDialog):
def __init__(self, parent=None):
super(Form, self).__init__(parent)
textCopyButton = QPushButton("&Copy Text")
textPasteButton = QPushButton("Paste &Text")
htmlCopyButton = QPushButton("C&opy HTML")
htmlPasteButton = QPushButton("Paste &HTML")
imageCopyButton = QPushButton("Co&py Image")
imagePasteButton = QPushButton("Paste &Image")
= QLabel("Original text")
= QLabel()
(QPixmap(((__file__), "images/")))
layout = QGridLayout()
(textCopyButton, 0, 0)
(imageCopyButton, 0, 1)
(htmlCopyButton, 0, 2)
(textPasteButton, 1, 0)
(imagePasteButton, 1, 1)
(htmlPasteButton, 1, 2)
(, 2, 0, 1, 2)
(, 2, 2)
(layout)
()
()
()
()
()
()
def copyText(self):
print(((__file__)))
clipboard = ()
("I've been clipped")
def pasteText(self):
clipboard = ()
(())
def copyImage(self):
clipboard = ()
(QPixmap(((__file__), "images/")))
def pasteImage(self):
clipboard = ()
(())
def copyHtml(self):
mimeData = QMimeData()
("<b>Bold and<font color=red>Red</font></b>")
clipboard = ()
(mimeData)
def pasteHtml(self):
clipboard = ()
mimeData = ()
if ():
(())
if __name__ == "__main__":
app = QApplication()
win = Form()
()
(app.exec_())
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