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如何更改 QTextDocument 中圖像的字體和大小？

[英]How to change the font and size of image in QTextDocument?

 原文  2020-10-17 14:00:50  3   1    python/ pyqt5/ qtextdocument

問題描述

我想打印一些由 qtdesigner 設計的文本和圖像。

如何在QTextDocument更改字體和其他格式？

from PyQt5 import QtCore, QtGui, QtWidgets, QtPrintSupport


class Ui_MainWindow(object):

    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)
        cursor.insertImage('logo4.jpg')
        cursor.insertBlock()
        cursor.insertText('MY TEXT')
        
        document.print_(printer)


    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_print_previw = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print_previw.setGeometry(QtCore.QRect(90, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print_previw.setFont(font)
        self.pushButton_print_previw.setObjectName("pushButton_print_previw")
        self.pushButton_print = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print.setGeometry(QtCore.QRect(440, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print.setFont(font)
        self.pushButton_print.setObjectName("pushButton_print")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        ############################################################
        self.pushButton_print_previw.clicked.connect(self.handlePreview)
        ############################################################

        ############################################################
        self.pushButton_print.clicked.connect(self.handlePrint)
        ############################################################



    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton_print_previw.setText(_translate("MainWindow", "Print Preview"))
        self.pushButton_print.setText(_translate("MainWindow", "Print"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

1 個解決方案

解決方案1
 0  2020-10-18 06:40:53

我想打印一些由qtdesigner設計的文本和圖像。

如何在QTextDocument更改字體和其他格式？

from PyQt5 import QtCore, QtGui, QtWidgets, QtPrintSupport


class Ui_MainWindow(object):

    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)
        cursor.insertImage('logo4.jpg')
        cursor.insertBlock()
        cursor.insertText('MY TEXT')
        
        document.print_(printer)


    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_print_previw = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print_previw.setGeometry(QtCore.QRect(90, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print_previw.setFont(font)
        self.pushButton_print_previw.setObjectName("pushButton_print_previw")
        self.pushButton_print = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print.setGeometry(QtCore.QRect(440, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print.setFont(font)
        self.pushButton_print.setObjectName("pushButton_print")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        ############################################################
        self.pushButton_print_previw.clicked.connect(self.handlePreview)
        ############################################################

        ############################################################
        self.pushButton_print.clicked.connect(self.handlePrint)
        ############################################################



    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton_print_previw.setText(_translate("MainWindow", "Print Preview"))
        self.pushButton_print.setText(_translate("MainWindow", "Print"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

解決方案2
 0  2020-12-31 14:06:56

document.print_(printer)很方便，但也不是很靈活。

因為您不使用QTextEdit ，所以您必須僅通過您的代碼編輯格式信息。 （預先設置的 setHtml 除外。）如果您喜歡繪制QPrinter文檔，則可以使用QPainter 。

通常情況下，雖然在paintEvent(self, event)使用了QPainter ，但只有將QPaintDevice的子類設置為QPainter構造函數，才可以隨意繪制。 但是您必須准確計算分配。

QPrinter 是QPaintDevice的子類。

陷阱

QPainter.drawText的左上角是 Text 的底線。

(x, y)→我的文字

這是代碼。

# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets, QtPrintSupport


class Ui_MainWindow(object):

    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)
#        cursor.insertImage('logo4.jpg')
#        cursor.insertBlock()
#        cursor.insertText('MY TEXT')
#        document.print_(printer)
        documentRootFrameFormat = document.rootFrame().frameFormat()
        documentLeftMargin = documentRootFrameFormat.leftMargin()
        documentTopMargin = documentRootFrameFormat.topMargin()
        drawn_im = QtGui.QImage("logo4.jpg")
        drawn_im_height = drawn_im.height()        

        painter = QtGui.QPainter(printer)
        painter.drawImage(documentLeftMargin, documentTopMargin, drawn_im)
        painter_font = painter.font()
        #you can set flag which font is used.
        custom_font = QtGui.QFont("Segoe UI Light", 18)        
        fontMetricsF = QtGui.QFontMetricsF(custom_font)
        painter.save()
        painter.setFont(custom_font)
        height_fontMetricsF = fontMetricsF.height()
        painter.drawText(documentLeftMargin, documentTopMargin + drawn_im_height + height_fontMetricsF, 'MY TEXT')
        painter.restore()



    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton_print_previw = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print_previw.setGeometry(QtCore.QRect(90, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print_previw.setFont(font)
        self.pushButton_print_previw.setObjectName("pushButton_print_previw")
        self.pushButton_print = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_print.setGeometry(QtCore.QRect(440, 270, 251, 91))
        font = QtGui.QFont()
        font.setPointSize(15)
        self.pushButton_print.setFont(font)
        self.pushButton_print.setObjectName("pushButton_print")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        ############################################################
        self.pushButton_print_previw.clicked.connect(self.handlePreview)
        ############################################################

        ############################################################
        self.pushButton_print.clicked.connect(self.handlePrint)
        ############################################################



    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton_print_previw.setText(_translate("MainWindow", "Print Preview"))
        self.pushButton_print.setText(_translate("MainWindow", "Print"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

我的結果我的結果

如果你想使用QTextCursor ，您可以使用的方法來設置字體和格式QTextCursor 。

您可以通過此代碼獲得類似的結果。 如果你不希望高度控制，我推薦這個。

其他解決方案

def handlePaintRequest(self, printer):
    document = QtGui.QTextDocument()
    cursor = QtGui.QTextCursor(document)
    
    cursor.insertImage("logo4.jpg")
    cursor.insertBlock()
    charFormat = cursor.charFormat()
    charFormat.setFont(QtGui.QFont("Segoe UI Light", 18))
    cursor.insertText('MY TEXT', charFormat)

    document.print_(printer)

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