PyQt5將Textedit保存到圖像

Question

我想將Qtexedit的文本保存到最好是PNG的圖像中。

可以使用QTextEdit :: document QTextDocument :: drawContents完成

但是我沒有找到任何例子。

Answer 1

您必須做的第一件事是創建一個具有適當大小的QPixmap ，用一些背景色填充它，然后創建一個QPainter ，這將負責在QPixmap上進行繪制，我們使用drawContents()進行繪制，並完成繪制end() ，最后我們使用QPixmap的save()函數將其save() 。

例：

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

html = """<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Cantarell'; font-size:11pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; font-style:italic; color:#000000; background-color:#ffffff;">Lorem ipsum</span><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; color:#000000; background-color:#ffffff;"> dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. </span><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; font-weight:600; color:#000000; background-color:#ffffff;">Duis aute irure dolor</span><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; color:#000000; background-color:#ffffff;"> in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, </span><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; text-decoration: underline; color:#000000; background-color:#ffffff;">sunt in culpa qui officia deserunt mollit anim id est laborum.</span></p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:'Open Sans,Arial,sans-serif'; font-size:14px; text-decoration: underline; color:#000000;"><br /></p>
<p align="center" style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style=" font-family:'Open Sans,Arial,sans-serif'; font-size:14px; color:#000000; background-color:#ffffff;">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</span></p></body></html>"""


def save(doc):
    pixmap = QPixmap(doc.idealWidth(), doc.size().height())
    pixmap.fill(Qt.white)
    painter = QPainter(pixmap)
    doc.drawContents(painter, QRectF(0, 0, doc.idealWidth(),  doc.size().height()))
    painter.end()
    pixmap.save("output.png", "PNG")

if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)
    w = QWidget()

    lay = QVBoxLayout(w)

    btn = QPushButton("Save")
    te = QTextEdit()

    lay.addWidget(btn)
    lay.addWidget(te)

    te.setHtml(html)

    w.show()
    btn.clicked.connect(lambda checked, doc=te.document(): save(doc))

    sys.exit(app.exec_())

GUI

PNG

加：

如果要反轉每個像素的顏色，則使用QImage更合適：

def save(doc):
    image = QImage(doc.idealWidth(), doc.size().height(), QImage.Format_RGB32)
    image.fill(Qt.white)
    painter = QPainter(image)
    doc.drawContents(painter, QRectF(0, 0, doc.idealWidth(),  doc.size().height()))
    painter.end()
    image.invertPixels(QImage.InvertRgb)
    image.save("output.png", "PNG")

PyQt5將Textedit保存到圖像

問題描述

1 個解決方案

解決方案1
1 已采納 2018-01-04 18:26:47

PyQt5將Textedit保存到圖像

問題描述

1 個解決方案

解決方案1 1 已采納 2018-01-04 18:26:47

解決方案1
1 已采納 2018-01-04 18:26:47