Question

如何从我的destop应用程序打印QTableWidget并将单元格调整为文本的长度？该表可由用户食用，并且包含文本，单词，图片和下拉菜单？

我尝试使用下面的代码来执行此操作，但是它以“进程结束，退出代码为-1073740791（0xC0000409）”退出

我正在使用python 3.6和pyqt5。

from PyQt5 import QtWidgets, QtCore, QtPrintSupport, QtGui

from PyQt5.QtWidgets import *

list_a =['word_a 1', 'word_a 2']
list_b =['word_b 1 ', 'word_b 2']
list_c =['word_c 1', 'word_c 2']
combo_box_options = ["Option 1","Option 2","Option 3"]
list_d = ['good','bad']
data = {'Wort A':list_a, 'Wort B':list_b, 'Wort C': list_c, 'Dropdown': [], 'Word D': list_d}


class Window(QTabWidget):
    def __init__(self):
        QtWidgets.QWidget.__init__(self)
        super().__init__()
        self.setWindowTitle(self.tr('Document Printer'))
        self.table = QtWidgets.QTableWidget()
        self.table.setRowCount(5)
        self.table.setColumnCount(5)

        horHeaders = []
        for col, key in enumerate(sorted(data.keys())):
            horHeaders.append(key)
            for row, item in enumerate(data[key]):
                newitem = QTableWidgetItem(item)
                newitem.setTextAlignment(QtCore.Qt.AlignCenter)
                self.table.setItem(row, col, newitem)


        combo_attr = ['bad word', 'good word', 'very nice word', 'delet']
        i = 0
        for j in horHeaders:
            comboBox = QtWidgets.QComboBox()
            for t in combo_attr:
                comboBox.addItem(t)
            self.table.setCellWidget(i,3,comboBox)
            i += 1


        self.table.setHorizontalHeaderLabels(
            'Word A|Word B|Word C|Dropdown|Word D'.split('|'))
        self.buttonPrint = QtWidgets.QPushButton('Print', self)
        self.buttonPrint.clicked.connect(self.handlePrint)
        self.buttonPreview = QtWidgets.QPushButton('Preview', self)
        self.buttonPreview.clicked.connect(self.handlePreview)
        layout = QtWidgets.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 = QtPrintSupport.QPrintDialog()
        if dialog.exec_() == QtWidgets.QDialog.Accepted:
            self.handlePaintRequest(dialog.printer())

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

    def handlePaintRequest(self, printer):
        document = QtGui.QTextDocument()
        cursor = QtGui.QTextCursor(document)
        table = cursor.insertTable(
            self.table.rowCount(), self.table.columnCount())

        for row in range(table.rows()):
            print(row)
            for col in range(table.columns()):
                print(col)
                cursor.insertText(self.table.newitem(row, col).text())
                cursor.movePosition(QtGui.QTextCursor.NextCell)
        document.print_(printer)




if __name__ == '__main__':

    import sys
    app = QtWidgets.QApplication(sys.argv)
    window = Window()
    window.resize(640, 480)
    window.show()
    sys.exit(app.exec_())

Answer 1

首先，我建议如果程序崩溃而没有给您太多信息，那么您必须在终端或cmd中运行它。如果执行此操作，则会收到以下消息：

AttributeError: 'QTableWidget' object has no attribute 'newitem'

问题很明显：QTableWidget没有此方法，部分解决方案是按项目更改newitem，但这也会带来问题，因为某些项目不存在，因此必须首先进行验证：

def handlePaintRequest(self, printer):
    document = QtGui.QTextDocument()
    cursor = QtGui.QTextCursor(document)
    table = cursor.insertTable(self.table.rowCount(), self.table.columnCount())

    for row in range(table.rows()):
        for col in range(table.columns()):
            it = self.table.item(row, col)
            if it is not None:
                cursor.insertText(it.text())
            cursor.movePosition(QtGui.QTextCursor.NextCell)
    document.print_(printer)

打印QTableWidget并没有得到普遍的回应，因为当您指向一个小部件时，您必须根据所使用的小部件来修改代码，例如，在这种情况下，我将创建一个根据以下内容返回文本的函数：嵌入式小部件：

    def handlePaintRequest(self, printer):
        document = QtGui.QTextDocument()
        cursor = QtGui.QTextCursor(document)
        table = cursor.insertTable(self.table.rowCount(), self.table.columnCount())

        for row in range(table.rows()):
            for col in range(table.columns()):
                w = self.table.cellWidget(row, col)
                it = self.table.item(row, col)
                if w is not None:
                    cursor.insertText(get_text_from_widget(w))
                elif it is not None:
                    cursor.insertText(it.text())
                cursor.movePosition(QtGui.QTextCursor.NextCell)
        document.print_(printer)


def get_text_from_widget(w):
    t = ""
    if isinstance(w, QtWidgets.QComboBox):
        t = w.currentText()

    # if isinstance(w, another_widget):
    # t = w.some_method()

    return t

从QTableWidget打印表

1 个答案: