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https://github.com/kovidgoyal/calibre.git
synced 2025-07-07 10:14:46 -04:00
Implement key based scrolling in the popup widget
This commit is contained in:
Kovid Goyal
parent
1c369d3528
commit
37352fefd7
@ -6,10 +6,11 @@ from __future__ import (unicode_literals, division, absolute_import,
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__license__ = 'GPL v3'
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__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
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import textwrap
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from math import ceil
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from PyQt5.Qt import (
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QWidget, Qt, QStaticText, QTextOption, QSize, QPainter, QTimer)
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QWidget, Qt, QStaticText, QTextOption, QSize, QPainter, QTimer, QPen)
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from calibre.gui2.tweak_book.widgets import make_highlighted_text
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from calibre.utils.icu import string_length
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@ -20,7 +21,7 @@ class CompletionPopup(QWidget):
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TOP_MARGIN = BOTTOM_MARGIN = 2
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def __init__(self, parent):
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def __init__(self, parent, max_height=1000):
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QWidget.__init__(self, parent)
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self.setFocusPolicy(Qt.NoFocus)
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self.setFocusProxy(parent)
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@ -29,6 +30,9 @@ class CompletionPopup(QWidget):
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self.matcher = None
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self.current_query = self.current_results = self.current_size_hint = None
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self.max_text_length = 0
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self.current_index = -1
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self.current_top_index = 0
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self.max_height = max_height
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self.text_option = to = QTextOption()
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to.setWrapMode(QTextOption.NoWrap)
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@ -52,17 +56,19 @@ class CompletionPopup(QWidget):
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self.clear_caches()
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self.set_query()
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def set_query(self, query=''):
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def set_query(self, query='', limit=100):
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self.current_size_hint = None
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self.current_query = query
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if self.matcher is None:
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self.current_results = ()
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else:
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if query:
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self.current_results = tuple(self.matcher(query).iteritems())
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self.current_results = tuple(self.matcher(query, limit=limit).iteritems())
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else:
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self.current_results = tuple((text, ()) for text in self.matcher.items)
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self.current_results = tuple((text, ()) for text in self.matcher.items[:limit])
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self.max_text_length = 0
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self.current_index = -1
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self.current_top_index = 0
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if self.current_results:
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self.max_text_length = max(string_length(text) for text, pos in self.current_results)
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@ -91,25 +97,62 @@ class CompletionPopup(QWidget):
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self.current_size_hint = QSize(max_width, height)
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return self.current_size_hint
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def iter_visible_items(self):
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y = self.TOP_MARGIN
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bottom = self.rect().bottom()
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for i, (text, positions) in enumerate(self.current_results[self.current_top_index:]):
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st = self.get_static_text(text, positions)
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height = self.BOTTOM_MARGIN + int(ceil(st.size().height()))
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if y + height > bottom:
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break
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yield i + self.current_top_index, st, y, height
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y += height
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def paintEvent(self, ev):
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painter = QPainter(self)
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painter.setClipRect(ev.rect())
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pal = self.palette()
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painter.fillRect(self.rect(), pal.color(pal.Base))
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painter.setFont(self.parent().font())
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y = self.TOP_MARGIN
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top, bottom = ev.rect().top(), ev.rect().bottom()
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for text, positions in self.current_results:
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st = self.get_static_text(text, positions)
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height = self.BOTTOM_MARGIN + int(ceil(st.size().height()))
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if y + height < top:
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continue
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if y + height > bottom:
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break
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painter.setPen(QPen(pal.color(pal.Text)))
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width = self.rect().width()
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for i, st, y, height in self.iter_visible_items():
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painter.save()
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if i == self.current_index:
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painter.fillRect(0, y, width, height, pal.color(pal.Highlight))
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painter.setPen(QPen(pal.color(pal.HighlightedText)))
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painter.drawStaticText(0, y, st)
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y += height
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painter.restore()
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painter.end()
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if self.current_size_hint is None:
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QTimer.singleShot(0, self.layout)
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def choose_next_result(self, previous=False):
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if self.current_results:
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if previous:
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if self.current_index == -1:
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self.current_index = len(self.current_results) - 1
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else:
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self.current_index -= 1
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else:
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if self.current_index == len(self.current_results) - 1:
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self.current_index = -1
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else:
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self.current_index += 1
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self.ensure_index_visible(self.current_index)
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self.update()
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def ensure_index_visible(self, index):
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if index < self.current_top_index:
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self.current_top_index = max(0, index)
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else:
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try:
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i = tuple(self.iter_visible_items())[-1][0]
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except IndexError:
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return
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if i < index:
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self.current_top_index += index - i
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def layout(self, cursor_rect=None):
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p = self.parent()
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if cursor_rect is None:
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@ -117,7 +160,7 @@ class CompletionPopup(QWidget):
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gutter_width = p.gutter_width
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vp = p.viewport()
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above = cursor_rect.top() > vp.height() - cursor_rect.bottom()
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max_height = (cursor_rect.top() if above else vp.height() - cursor_rect.bottom()) - 15
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max_height = min(self.max_height, (cursor_rect.top() if above else vp.height() - cursor_rect.bottom()) - 15)
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max_width = vp.width() - 25 - gutter_width
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sz = self.sizeHint()
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height = min(max_height, sz.height())
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@ -143,14 +186,41 @@ class CompletionPopup(QWidget):
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def eventFilter(self, obj, ev):
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if obj is self.parent() and self.isVisible():
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if ev.type() == ev.Resize:
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if ev.type() == ev.KeyPress:
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key = ev.key()
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if key == Qt.Key_Escape:
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self.hide()
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return True
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if key == Qt.Key_Tab:
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self.choose_next_result(previous=ev.modifiers() & Qt.ShiftModifier)
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return True
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if key == Qt.Key_Backtab:
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self.choose_next_result(previous=ev.modifiers() & Qt.ShiftModifier)
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return True
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if key in (Qt.Key_Up, Qt.Key_Down):
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self.choose_next_result(previous=key == Qt.Key_Up)
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return True
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elif ev.type() == ev.Resize:
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self.relayout_timer.start()
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return False
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if __name__ == '__main__':
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def test(editor):
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c = editor.__c = CompletionPopup(editor.editor)
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c.set_items('one two three four five'.split())
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c = editor.__c = CompletionPopup(editor.editor, max_height=100)
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c.set_items('one two three four five six seven eight nine ten'.split())
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QTimer.singleShot(10, c.show)
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from calibre.gui2.tweak_book.editor.widget import launch_editor
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launch_editor('''<p>Something something</p>''', path_is_raw=True, callback=test)
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raw = textwrap.dedent('''\
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Is the same as saying through shrinking from toil and pain. These
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cases are perfectly simple and easy to distinguish. In a free hour, when
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our power of choice is untrammelled and when nothing prevents our being
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able to do what we like best, every pleasure is to be welcomed and every
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pain avoided.
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But in certain circumstances and owing to the claims of duty or the obligations
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of business it will frequently occur that pleasures have to be repudiated and
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annoyances accepted. The wise man therefore always holds in these matters to
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this principle of selection: he rejects pleasures to secure.
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''')
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launch_editor(raw, path_is_raw=True, callback=test)
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