Mercurial Repositories > eric / file comparison
comparison: eric6/Helpviewer/HelpSnap.py
eric6/Helpviewer/HelpSnap.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2010 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing functions to generate page previews. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import QSize, Qt | |
| 13 from PyQt5.QtGui import QPixmap, QPainter | |
| 14 from PyQt5.QtWebKitWidgets import QWebFrame | |
| 15 | |
| 16 | |
| 17 def renderTabPreview(page, w, h): | |
| 18 """ | |
| 19 Public function to render a pixmap of a page. | |
| 20 | |
| 21 @param page reference to the page to be previewed (QWebPage) | |
| 22 @param w width of the preview pixmap (integer) | |
| 23 @param h height of the preview pixmap (integer) | |
| 24 @return preview pixmap (QPixmap) | |
| 25 """ | |
| 26 oldSize = page.viewportSize() | |
| 27 width = page.mainFrame().contentsSize().width() | |
| 28 page.setViewportSize(QSize(width, int(width * h / w))) | |
| 29 pageImage = __render(page, page.viewportSize().width(), | |
| 30 page.viewportSize().height()) | |
| 31 page.setViewportSize(oldSize) | |
| 32 return pageImage.scaled( | |
| 33 w, h, Qt.IgnoreAspectRatio, Qt.SmoothTransformation) | |
| 34 | |
| 35 | |
| 36 def __render(page, w, h): | |
| 37 """ | |
| 38 Private function to render a pixmap of given size for a web page. | |
| 39 | |
| 40 @param page reference to the page to be rendered (QWebPage) | |
| 41 @param w width of the pixmap (integer) | |
| 42 @param h height of the pixmap (integer) | |
| 43 @return rendered pixmap (QPixmap) | |
| 44 """ | |
| 45 # create the page image | |
| 46 pageImage = QPixmap(w, h) | |
| 47 pageImage.fill(Qt.transparent) | |
| 48 | |
| 49 # render it | |
| 50 p = QPainter(pageImage) | |
| 51 page.mainFrame().render(p, QWebFrame.ContentsLayer) | |
| 52 p.end() | |
| 53 | |
| 54 return pageImage |
