Drag and Drop

Listing 25 scripts/PYQT5/01_customize_widget/03_drag_and_drop/main.py

# -*- coding: utf-8 -*-

import sys
import codecs
from PyQt5.QtWidgets import QApplication, QLabel, QVBoxLayout, QWidget
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt
@@ -12,13 +13,15 @@ def __init__(self):
        self.label = QLabel(self)
        self.label.setText("Drag & Drop an Image or Text here!")
        self.label.setAlignment(Qt.AlignCenter)
        self.label.setWordWrap(True)

        layout = QVBoxLayout()
        layout.addWidget(self.label)

        self.setLayout(layout)

        self.setAcceptDrops(True)
        self.setMinimumSize(300, 200)

    def dragEnterEvent(self, event):
        mime = event.mimeData()
        if mime.hasUrls():  # 파일 URL이 있는지 확인
            # 첫 번째 URL만 사용 (다중 파일 선택을 지원하지 않음)
            file_url = mime.urls()[0]
            pixmap = QPixmap(file_url.toLocalFile())  # 파일 경로로 QPixmap 로드
            self.label.setFixedSize(pixmap.size())  # 라벨의 크기를 QPixmap의 크기에 맞게 조정
            self.label.setPixmap(pixmap)
            self.setFixedSize(pixmap.size())  # 메인 윈도우의 크기를 QPixmap의 크기에 맞게 조정
            file_url = mime.urls()[0].toLocalFile()
            if file_url.endswith('.txt'):
                with codecs.open(file_url, 'r', encoding='utf-8') as file:
                    content = file.read()
                self.label.setText(content)
                self.label.adjustSize()
                self.resize(self.label.width(), self.label.height() + 50)
            else:
                pixmap = QPixmap(file_url)
                self.label.setPixmap(pixmap)
                self.label.setFixedSize(pixmap.size())
                self.setFixedSize(pixmap.size())
        elif mime.hasText():
            self.label.setText(mime.text())
            self.label.adjustSize()  # 라벨 크기를 텍스트 크기에 맞게 조절
            self.resize(self.label.width(), self.label.height() + 50)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = DragDropWidget()
    window.show()
    sys.exit(app.exec_())

In this example, functionality has been implemented to display content on the widget when the user drag-and-drops a text or image file onto the widget.

setAcceptDrops(True): This setting enables the widget to accept drag and drop actions.
dragEnterEvent: Handles the event to accept if the dragged data is either text or an image.
dropEvent: Displays the dragged data on the label. For image files, it loads the image using a QPixmap object and adjusts the size of the label and the main window to the image size. For text, it directly displays the dragged text on the label.