QT把widget转换成图片后打印-白红宇

QT把widget转换成图片后打印

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发布时间：2019-06-29

本文共 2407 字，大约阅读时间需要 8 分钟。

from PyQt5.QtWidgets import (QApplication, QWidget, QTableWidget,QPushButton,                              QVBoxLayout,                             QTableWidgetItem)from PyQt5.QtGui import  QPixmap, QPainter, QImage, QTextDocumentfrom PyQt5.QtPrintSupport import  QPrinter, QPrintDialog, QPrintPreviewDialogfrom PyQt5.QtCore import QRect, QPoint, QSize ,  Qt   def on_picButton_clicked():    printer =QPrinter(QPrinter.HighResolution)#/* 打印预览 */    preview =QPrintPreviewDialog(printer,widget )       """     * QPrintPreviewDialog类提供了一个打印预览对话框，里面功能比较全，     * paintRequested(QPrinter *printer)是系统提供的，     * 当preview.exec()执行时该信号被触发，     * plotPic(QPrinter *printer)是用户自定义的槽函数，图像的绘制就在这个函数里。    """    preview.paintRequested.connect(plotPic)    preview.exec(); #/* 等待预览界面退出 */def  plotPic(printer):          painter =QPainter(printer);    image = QPixmap()    image=widget.grab(QRect( QPoint( 0, 0 ),                                             QSize( widget.size().width(),                                                         widget.size().height()                                                    )                                         )                                )# /* 绘制窗口至画布 */   #QRect     rect = painter.viewport();   #QSize     size = image.size();    size.scale(rect.size(), Qt.KeepAspectRatio)#     //此处保证图片显示完整    painter.setViewport(rect.x(), rect.y(),size.width(), size.height());    painter.setWindow(image.rect());    painter.drawPixmap(0,0,image); #/* 数据显示至预览界面 */import sysapp = QApplication(sys.argv)tablewidget = QTableWidget()## 设置列数tablewidget.setColumnCount(4)tablewidget.horizontalHeader().setDefaultSectionSize(150)## QStringList在PyQt5header= ["name", "last modify time","type",  "size"]tablewidget.setHorizontalHeaderLabels(header)tablewidget.insertRow(0)tablewidget.insertRow(0)pItem1 =  QTableWidgetItem("aa" )pItem2 =  QTableWidgetItem("bb" )pItem3 =  QTableWidgetItem("cc" )pItem4 =  QTableWidgetItem("dd" )tablewidget.setItem( 0, 0, pItem1 )tablewidget.setItem( 0, 1, pItem2 )tablewidget.setItem( 0, 2, pItem3 )tablewidget.setItem( 0, 3, pItem4 )tablewidget.setMinimumSize(800, 600)button = QPushButton('打印界面')button.clicked.connect(on_picButton_clicked)widget = QWidget()layout = QVBoxLayout(widget)layout.addWidget(button)layout.addWidget(button_txt)layout.addWidget(tablewidget)widget.show()sys.exit(app.exec_())

转载于:https://www.cnblogs.com/ribavnu/p/4680734.html

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