class Message(QWidget):
def __init__(self, parent):
QWidget.__init__(self, parent)
self.layout = QTextLayout()
self.layout.setFont(self.font())
self.layout.setCacheEnabled(True)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
self.last_layout_rect = None
def setText(self, text):
self.layout.setText(text)
self.last_layout_rect = None
self.update()
def sizeHint(self):
return QSize(10, 10)
def do_layout(self):
ly = self.layout
ly.beginLayout()
w = self.width() - 5
height = 0
leading = self.fontMetrics().leading()
while True:
line = ly.createLine()
if not line.isValid():
break
line.setLineWidth(w)
height += leading
line.setPosition(QPointF(5, height))
height += line.height()
ly.endLayout()
def paintEvent(self, ev):
if self.last_layout_rect != self.rect():
self.do_layout()
p = QPainter(self)
br = self.layout.boundingRect()
y = 0
if br.height() < self.height():
y = (self.height() - br.height()) / 2
self.layout.draw(p, QPointF(0, y))
class Message(QWidget):
def __init__(self, parent):
QWidget.__init__(self, parent)
self.layout = QTextLayout()
self.layout.setFont(self.font())
self.layout.setCacheEnabled(True)
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
self.last_layout_rect = None
def setText(self, text):
self.layout.setText(text)
self.last_layout_rect = None
self.update()
def sizeHint(self):
return QSize(10, 10)
def do_layout(self):
ly = self.layout
ly.beginLayout()
w = self.width() - 5
height = 0
leading = self.fontMetrics().leading()
while True:
line = ly.createLine()
if not line.isValid():
break
line.setLineWidth(w)
height += leading
line.setPosition(QPointF(5, height))
height += line.height()
ly.endLayout()
def paintEvent(self, ev):
if self.last_layout_rect != self.rect():
self.do_layout()
p = QPainter(self)
br = self.layout.boundingRect()
y = 0
if br.height() < self.height():
y = (self.height() - br.height()) / 2
self.layout.draw(p, QPointF(0, y))
def viewItemDrawText(self, painter, option, rect, text, color, searchText=''): # noqa C901
'''
@note: most of codes taken from QCommonStylePrivate::viewItemDrawText
added highlighting and simplified for single-line textlayouts
@param painter QPainter
@param option QStyleOptionViewItem
@param rect QRect
@param text QString
@param color QColor
@param searchText QString
@return: int
'''
if not text:
return 0
fontMetrics = QFontMetrics(painter.font())
elidedText = fontMetrics.elidedText(text, option.textElideMode, rect.width())
textOption = QTextOption()
textOption.setWrapMode(QTextOption.NoWrap)
textOption.setAlignment(QStyle.visualAlignment(textOption.textDirection(),
option.displayAlignment))
textLayout = QTextLayout()
textLayout.setFont(painter.font())
textLayout.setText(elidedText)
textLayout.setTextOption(textOption)
if searchText:
# QList<int>
delimiters = []
searchStrings = [ item.strip() for item in searchText.split(' ') ]
searchStrings = [ item for item in searchStrings if item ]
# Look for longer parts first
searchStrings.sort(key=lambda x: len(x), reverse=True)
text0 = text.lower()
for string in searchStrings:
string0 = string.lower()
delimiter = text0.find(string0)
while delimiter != -1:
start = delimiter
end = delimiter + len(string)
alreadyContains = False
for idx in range(0, len(delimiters), 2):
dStart = delimiters[idx]
dEnd = delimiters[idx+1]
if dStart <= start and dEnd >= end:
alreadyContains = True
break
if not alreadyContains:
delimiters.append(start)
delimiters.append(end)
delimiter = text0.find(string0, end)
# We need to sort delimiters to properly paint all parts that user typed
delimiters.sort()
# If we don't find any match, just paint it withoutany highlight
if delimiters and len(delimiters) % 2 == 0:
highlightParts = [] # QList<QTextLayout::FormatRange>
while delimiters:
highlightedPart = QTextLayout.FormatRange()
start = delimiters.pop(0)
end = delimiters.pop(0)
highlightedPart.start = start
highlightedPart.length = end - start
highlightedPart.format.setFontWeight(QFont.Bold)
highlightedPart.format.setUnderlineStyle(QTextCharFormat.SingleUnderline)
highlightParts.append(highlightedPart)
textLayout.setAdditionalFormats(highlightParts)
# do layout
self._s_viewItemDrawText(textLayout, rect.width())
if textLayout.lineCount() <= 0:
return 0
textLine = textLayout.lineAt(0)
# if elidedText after highlighting is longer than available width then
# re-elide it and redo layout
diff = textLine.naturalTextWidth() - rect.width()
if diff > 0:
# TODO: ?
elidedText = fontMetrics.elidedText(elidedText, option.textElideMode,
rect.width() - diff)
textLayout.setText(elidedText)
# redo layout
self._s_viewItemDrawText(textLayout, rect.width())
if textLayout.lineCount() <= 0:
return 0
textLine = textLayout.lineAt(0)
# draw line
painter.setPen(color)
# qreal
width = max(rect.width(), textLayout.lineAt(0).width())
# QRect
layoutRect = QStyle.alignedRect(option.direction, option.displayAlignment,
QSize(int(width), int(textLine.height())), rect)
# QPointF
position = layoutRect.topLeft()
textLine.draw(painter, position)
return int(min(rect.width(), textLayout.lineAt(0).naturalTextWidth()))
