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E-book viewer: Fix bug that was causing viewer to sometimes not scroll to the top of the page when clicking a link in the Table of Contents that points to the top of the page.

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Kovid Goyal 2009-08-21 14:45:56 -06:00
parent 1ae9666d87
commit b1f5c25405
1 changed files with 10 additions and 3 deletions
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13
src/calibre/gui2/viewer/documentview.py
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@ -368,6 +368,7 @@ def __init__(self, *args):
self.setPage(self.document)
self.manager = None
self._reference_mode = False
self._ignore_scrollbar_signals = False
self.connect(self.document, SIGNAL('loadStarted()'), self.load_started)
self.connect(self.document, SIGNAL('loadFinished(bool)'), self.load_finished)
self.connect(self.document, SIGNAL('linkClicked(QUrl)'), self.link_clicked)
@ -467,13 +468,16 @@ def initialize_scrollbar(self):
if getattr(self, 'scrollbar', None) is not None:
delta = self.document.width - self.size().width()
if delta > 0:
self._ignore_scrollbar_signals = True
self.scrollbar.blockSignals(True)
self.scrollbar.setRange(0, delta)
self.scrollbar.setValue(0)
self.scrollbar.setSingleStep(1)
self.scrollbar.setPageStep(int(delta/10.))
self.scrollbar.blockSignals(False)
self.scrollbar.setVisible(delta > 0)
self.scrollbar.blockSignals(False)
self._ignore_scrollbar_signals = False
def load_finished(self, ok):
self._size_hint = self.document.mainFrame().contentsSize()
@ -565,6 +569,8 @@ def scroll_by(self, x=0, y=0, notify=True):
self.manager.scrolled(self.scroll_fraction)
def scroll_to(self, pos, notify=True):
if self._ignore_scrollbar_signals:
return
old_pos = self.document.ypos
if isinstance(pos, basestring):
self.document.jump_to_anchor(pos)
@ -572,8 +578,9 @@ def scroll_to(self, pos, notify=True):
if pos >= 1:
self.document.scroll_to(0, self.document.height)
else:
self.document.scroll_to(0, int(math.ceil(
pos*(self.document.height-self.document.window_height))))
y = int(math.ceil(
pos*(self.document.height-self.document.window_height)))
self.document.scroll_to(0, y)
if notify and self.manager is not None and self.document.ypos != old_pos:
self.manager.scrolled(self.scroll_fraction)