如何打印 QTableView [英] How to print a QTableView

问题描述

我有一个 Python 和 PySide 应用程序，它连接到 mysql 数据库并在 QTableView 中显示查询结果.我需要打印表格视图的内容.这是一些代码:

I have a Python and PySide app that connects to a mysql database and displays the results of a query in a QTableView. I need to print the contents of the table view. Here's some code:

    self.db_table = QtGui.QTableView(self)
    self.model =  QtSql.QSqlQueryModel()
    self.model.setQuery("SELECT * FROM simpsons")
    self.model.setHeaderData(1, QtCore.Qt.Horizontal, self.tr("First Name"))
    self.model.setHeaderData(2, QtCore.Qt.Horizontal, self.tr("Last Name"))
    self.db_table.setModel(self.model) 

    self.print_btn = QtGui.QPushButton("Print")
    self.print_btn.clicked.connect(self.print_btn_clicked)

    def print_btn_clicked(self):
        printDialog = QtGui.QPrintDialog(self.printer, self)
        if printDialog.exec_() == QtGui.QDialog.Accepted:
         #printing code

我找不到这方面的示例，而且我对文档的了解也不多，所以我希望得到一些帮助

I can't find an example for this and I don't understand much from the documentation so I'd appreciate some help

推荐答案

一种方法是将表格内容转储到 QTextDocument 中，然后打印出来.

One way to do it is to dump the table contents into a QTextDocument, and then print that.

以下演示使用一个简单的文本表，但可以使用 html 来获得更复杂的格式:

The following demo uses a simple text-table, but html could be used to get more sophisticated formatting:

from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):
    def __init__(self, rows, columns):
        QtGui.QWidget.__init__(self)
        self.table = QtGui.QTableView(self)
        model =  QtGui.QStandardItemModel(rows, columns, self.table)
        for row in range(rows):
            for column in range(columns):
                item = QtGui.QStandardItem('(%d, %d)' % (row, column))
                item.setTextAlignment(QtCore.Qt.AlignCenter)
                model.setItem(row, column, item)
        self.table.setModel(model)
        self.buttonPrint = QtGui.QPushButton('Print', self)
        self.buttonPrint.clicked.connect(self.handlePrint)
        self.buttonPreview = QtGui.QPushButton('Preview', self)
        self.buttonPreview.clicked.connect(self.handlePreview)
        layout = QtGui.QGridLayout(self)
        layout.addWidget(self.table, 0, 0, 1, 2)
        layout.addWidget(self.buttonPrint, 1, 0)
        layout.addWidget(self.buttonPreview, 1, 1)

    def handlePrint(self):
        dialog = QtGui.QPrintDialog()
        if dialog.exec_() == QtGui.QDialog.Accepted:
            self.handlePaintRequest(dialog.printer())

    def handlePreview(self):
        dialog = QtGui.QPrintPreviewDialog()
        dialog.paintRequested.connect(self.handlePaintRequest)
        dialog.exec_()

    def handlePaintRequest(self, printer):
        document = QtGui.QTextDocument()
        cursor = QtGui.QTextCursor(document)
        model = self.table.model()
        table = cursor.insertTable(
            model.rowCount(), model.columnCount())
        for row in range(table.rows()):
            for column in range(table.columns()):
                cursor.insertText(model.item(row, column).text())
                cursor.movePosition(QtGui.QTextCursor.NextCell)
        document.print_(printer)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window(25, 2)
    window.resize(300, 400)
    window.show()
    sys.exit(app.exec_())

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