Python调用打印机参考例子

from PyQt5.QtWidgets import (QApplication, QWidget, QTableWidget,QPushButton,

QVBoxLayout,

QTableWidgetItem)

from PyQt5.QtGui import QPixmap, QPainter, QImage, QTextDocument

from PyQt5.QtPrintSupport import QPrinter, QPrintDialog, QPrintPreviewDialog

from PyQt5.QtCore import QRect, QPoint, QSize , Qt

# 有预览框<br># 908204694@qq.com<br>#

def on_htmlButton_clicked():

printer =QPrinter(QPrinter.HighResolution)

#/* 打印预览 */

preview =QPrintPreviewDialog(printer,widget )

preview.paintRequested.connect(printHtml)

#

# 显示预览框

#

#preview.exec()

preview.exec_()

def printHtml(printer):

html = '''<html>

<head></head>

<body>

<h1>55555</h1><b>bold</b><h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b><h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b><h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b><h1>55555</h1><b>bold</b>

<h1>55555</h1><b>bold</b>

</body>

</html>'''

textDocument = QTextDocument()

textDocument.setHtml(html)

#textDocument.print(printer)

textDocument.print_(printer)

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 sys

app = QApplication(sys.argv)

tablewidget = QTableWidget()

## 设置列数

tablewidget.setColumnCount(4)

tablewidget.horizontalHeader().setDefaultSectionSize(150)

## QStringList在PyQt5

header= ['name', 'last modify time','type', 'size']

tablewidget.setHorizontalHeaderLabels(header)

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)

button_txt = QPushButton('打印文字')

button_txt.clicked.connect(on_htmlButton_clicked)

widget = QWidget()

layout = QVBoxLayout(widget)

layout.addWidget(button)

layout.addWidget(button_txt)

layout.addWidget(tablewidget)

widget.show()

sys.exit(app.exec_())

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