pyqt如何显示和打印本地pdf文件
时间: 2024-09-11 20:19:07 浏览: 78
在PyQt中,可以使用`PyQt5.QtPrintSupport`模块来展示和打印PDF文件,通常会结合`QPrinter`和`QPrintDialog`类来完成。以下是基本的步骤:
1. 首先,确保已安装了`PyQt5`以及支持PDF阅读的第三方库,如`qrcode`(用于生成二维码,以便预览)、`PDFdocument`等。
```python
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QImageReader, QPixmap, QPrinter
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction, QLabel, QMessageBox
```
2. 加载PDF文件并转换成QImage:
```python
def load_pdf(pdf_path):
reader = QImageReader(pdf_path)
if not reader.supportedImageFormats():
QMessageBox.warning(None, "Error", f"Unsupported PDF format for {pdf_path}")
return None
image = reader.read()
if not image:
QMessageBox.warning(None, "Error", f"Failed to read {pdf_path}")
return None
return image
image = load_pdf('path_to_your_pdf.pdf')
```
3. 创建QLabel来显示PDF图片,并用QPrintDialog预览和打印:
```python
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.pdf_label = QLabel(self)
self.setCentralWidget(self.pdf_label)
action = QAction("Print", self)
action.triggered.connect(self.print_pdf)
self.addAction(action)
def print_pdf(self):
printer = QPrinter()
dialog = QPrintDialog(printer, self)
if dialog.exec_() == QDialog.Accepted:
painter = QPainter(printer)
pixmap = QPixmap.fromImage(image)
painter.drawPixmap(0, 0, pixmap)
painter.end()
# 实例化并运行主窗口
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
```
4.
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