Mercurial Repositories > eric / file comparison
comparison: eric7/WebBrowser/AutoScroll/FrameScroller.py
eric7/WebBrowser/AutoScroll/FrameScroller.py
- branch
- eric7
- changeset 8312
- 800c432b34c8
- parent 8218
- 7c09585bd960
- child 8318
- 962bce857696
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| 8311:4e8b98454baa | 8312:800c432b34c8 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2016 - 2021 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing an object to scroll a web page. | |
| 8 """ | |
| 9 | |
| 10 # | |
| 11 # This module is based on the Qupzilla frame scroller. | |
| 12 # Copyright (C) 2014 David Rosca <nowrep@gmail.com> | |
| 13 # | |
| 14 | |
| 15 import math | |
| 16 | |
| 17 from PyQt5.QtCore import pyqtSlot, QObject, QTimer | |
| 18 | |
| 19 | |
| 20 class FrameScroller(QObject): | |
| 21 """ | |
| 22 Class implementing a web page scroller object. | |
| 23 """ | |
| 24 def __init__(self, parent=None): | |
| 25 """ | |
| 26 Constructor | |
| 27 | |
| 28 @param parent reference to the parent object | |
| 29 @type QObject | |
| 30 """ | |
| 31 super().__init__(parent) | |
| 32 | |
| 33 self.__page = None | |
| 34 | |
| 35 self.__lengthX = 0 | |
| 36 self.__lengthY = 0 | |
| 37 self.__divider = 8.0 | |
| 38 | |
| 39 self.__timer = QTimer(self) | |
| 40 self.__timer.setInterval(10) | |
| 41 self.__timer.timeout.connect(self.__scrollStep) | |
| 42 | |
| 43 def setPage(self, page): | |
| 44 """ | |
| 45 Public method to set the web page to be scrolled. | |
| 46 | |
| 47 @param page page to be scrolled | |
| 48 @type WebBrowserPage | |
| 49 """ | |
| 50 self.__page = page | |
| 51 | |
| 52 def scrollDivider(self): | |
| 53 """ | |
| 54 Public method to get the current scroll divider value. | |
| 55 | |
| 56 @return scroll divider | |
| 57 @rtype float | |
| 58 """ | |
| 59 return self.__divider | |
| 60 | |
| 61 def setScrollDivider(self, divider): | |
| 62 """ | |
| 63 Public method to set the scroll divider value. | |
| 64 | |
| 65 @param divider scroll divider | |
| 66 @type float | |
| 67 """ | |
| 68 self.__divider = divider | |
| 69 | |
| 70 def startScrolling(self, lengthX, lengthY): | |
| 71 """ | |
| 72 Public method to start scrolling. | |
| 73 | |
| 74 @param lengthX X distance from scroll indicator | |
| 75 @type int | |
| 76 @param lengthY Y distance from scroll indicator | |
| 77 @type int | |
| 78 """ | |
| 79 self.__lengthX = lengthX | |
| 80 self.__lengthY = lengthY | |
| 81 | |
| 82 if not self.__lengthX and not self.__lengthY: | |
| 83 self.__timer.stop() | |
| 84 elif not self.__timer.isActive(): | |
| 85 self.__timer.start() | |
| 86 | |
| 87 def stopScrolling(self): | |
| 88 """ | |
| 89 Public method to stop scrolling. | |
| 90 """ | |
| 91 self.__timer.stop() | |
| 92 | |
| 93 @pyqtSlot() | |
| 94 def __scrollStep(self): | |
| 95 """ | |
| 96 Private slot to scroll one step. | |
| 97 """ | |
| 98 self.__page.scroll( | |
| 99 math.ceil(self.__lengthX / self.__divider), | |
| 100 math.ceil(self.__lengthY / self.__divider) | |
| 101 ) |
