Mercurial Repositories > eric / file comparison
comparison: eric6/WebBrowser/SpeedDial/PageThumbnailer.py
eric6/WebBrowser/SpeedDial/PageThumbnailer.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7229
- 53054eb5b15a
equal
deleted
inserted
replaced
| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2012 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing an object to create a thumbnail image of a web site. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 from PyQt5.QtCore import pyqtSignal, QObject, QSize, Qt, QUrl, QTimer | |
| 13 from PyQt5.QtGui import QPixmap, QImage, QPainter | |
| 14 from PyQt5.QtWebEngineWidgets import QWebEngineView | |
| 15 | |
| 16 | |
| 17 class PageThumbnailer(QObject): | |
| 18 """ | |
| 19 Class implementing a thumbnail creator for web sites. | |
| 20 | |
| 21 @signal thumbnailCreated(QPixmap) emitted after the thumbnail has been | |
| 22 created | |
| 23 """ | |
| 24 thumbnailCreated = pyqtSignal(QPixmap) | |
| 25 | |
| 26 def __init__(self, parent=None): | |
| 27 """ | |
| 28 Constructor | |
| 29 | |
| 30 @param parent reference to the parent object (QObject) | |
| 31 """ | |
| 32 super(PageThumbnailer, self).__init__(parent) | |
| 33 | |
| 34 self.__size = QSize(231, 130) | |
| 35 self.__loadTitle = False | |
| 36 self.__title = "" | |
| 37 self.__url = QUrl() | |
| 38 | |
| 39 self.__view = QWebEngineView() | |
| 40 self.__view.setAttribute(Qt.WA_DontShowOnScreen) | |
| 41 self.__view.resize(1920, 1080) | |
| 42 self.__view.show() | |
| 43 | |
| 44 def setSize(self, size): | |
| 45 """ | |
| 46 Public method to set the size of the image. | |
| 47 | |
| 48 @param size size of the image (QSize) | |
| 49 """ | |
| 50 if size.isValid(): | |
| 51 self.__size = QSize(size) | |
| 52 | |
| 53 def setUrl(self, url): | |
| 54 """ | |
| 55 Public method to set the URL of the site to be thumbnailed. | |
| 56 | |
| 57 @param url URL of the web site (QUrl) | |
| 58 """ | |
| 59 if url.isValid(): | |
| 60 self.__url = QUrl(url) | |
| 61 | |
| 62 def url(self): | |
| 63 """ | |
| 64 Public method to get the URL of the thumbnail. | |
| 65 | |
| 66 @return URL of the thumbnail (QUrl) | |
| 67 """ | |
| 68 return QUrl(self.__url) | |
| 69 | |
| 70 def loadTitle(self): | |
| 71 """ | |
| 72 Public method to check, if the title is loaded from the web site. | |
| 73 | |
| 74 @return flag indicating, that the title is loaded (boolean) | |
| 75 """ | |
| 76 return self.__loadTitle | |
| 77 | |
| 78 def setLoadTitle(self, load): | |
| 79 """ | |
| 80 Public method to set a flag indicating to load the title from | |
| 81 the web site. | |
| 82 | |
| 83 @param load flag indicating to load the title (boolean) | |
| 84 """ | |
| 85 self.__loadTitle = load | |
| 86 | |
| 87 def title(self): | |
| 88 """ | |
| 89 Public method to get the title of the thumbnail. | |
| 90 | |
| 91 @return title of the thumbnail (string) | |
| 92 """ | |
| 93 if self.__title: | |
| 94 title = self.__title | |
| 95 else: | |
| 96 title = self.__url.host() | |
| 97 if not title: | |
| 98 title = self.__url.toString() | |
| 99 return title | |
| 100 | |
| 101 def start(self): | |
| 102 """ | |
| 103 Public method to start the thumbnailing action. | |
| 104 """ | |
| 105 self.__view.loadFinished.connect(self.__createThumbnail) | |
| 106 self.__view.load(self.__url) | |
| 107 | |
| 108 def __createThumbnail(self, status): | |
| 109 """ | |
| 110 Private slot creating the thumbnail of the web site. | |
| 111 | |
| 112 @param status flag indicating a successful load of the web site | |
| 113 (boolean) | |
| 114 """ | |
| 115 if not status: | |
| 116 self.thumbnailCreated.emit(QPixmap()) | |
| 117 return | |
| 118 | |
| 119 QTimer.singleShot(1000, self.__grabThumbnail) | |
| 120 | |
| 121 def __grabThumbnail(self): | |
| 122 """ | |
| 123 Private slot to grab the thumbnail image from the view. | |
| 124 """ | |
| 125 self.__title = self.__view.title() | |
| 126 | |
| 127 image = QImage(self.__view.size(), QImage.Format_ARGB32) | |
| 128 painter = QPainter(image) | |
| 129 self.__view.render(painter) | |
| 130 painter.end() | |
| 131 | |
| 132 scaledImage = image.scaled(self.__size, | |
| 133 Qt.KeepAspectRatioByExpanding, | |
| 134 Qt.SmoothTransformation) | |
| 135 | |
| 136 self.thumbnailCreated.emit(QPixmap.fromImage(scaledImage)) |
