[PyQt] [PYQT5]Highlight search results in qtablewidget(select and highlight that text or character not all of the row or column)
Maziar Parsijani
maziar.parsijani at gmail.com
Mon Aug 20 17:58:06 BST 2018
Here I think Maurizio code will functioning like this :
from PyQt5 import QtCore, QtGui, QtWidgets
import random
import html
words = ["Hello", "world", "Stack", "Overflow", "Hello world",
"""<font color="red">Hello world</font>"""]
class HTMLDelegate(QtWidgets.QStyledItemDelegate):
def __init__(self, parent=None):
super(HTMLDelegate, self).__init__(parent)
self.doc = QtGui.QTextDocument(self)
def paint(self, painter, option, index):
substring = index.data(QtCore.Qt.UserRole)
painter.save()
options = QtWidgets.QStyleOptionViewItem(option)
self.initStyleOption(options, index)
res = ""
color = QtGui.QColor("orange")
if substring:
substrings = options.text.split(substring)
res = """<font
color="{}">{}</font>""".format(color.name(QtGui.QColor.HexRgb),
substring).join(list(map(html.escape, substrings)))
else:
res = html.escape(options.text)
self.doc.setHtml(res)
options.text = ""
style = QtWidgets.QApplication.style() if options.widget is None \
else options.widget.style()
style.drawControl(QtWidgets.QStyle.CE_ItemViewItem, options, painter)
ctx = QtGui.QAbstractTextDocumentLayout.PaintContext()
if option.state & QtWidgets.QStyle.State_Selected:
ctx.palette.setColor(QtGui.QPalette.Text, option.palette.color(
QtGui.QPalette.Active, QtGui.QPalette.HighlightedText))
else:
ctx.palette.setColor(QtGui.QPalette.Text, option.palette.color(
QtGui.QPalette.Active, QtGui.QPalette.Text))
textRect = style.subElementRect(
QtWidgets.QStyle.SE_ItemViewItemText, options)
if index.column() != 0:
textRect.adjust(5, 0, 0, 0)
thefuckyourshitup_constant = 4
margin = (option.rect.height() - options.fontMetrics.height()) // 2
margin = margin - thefuckyourshitup_constant
textRect.setTop(textRect.top() + margin)
painter.translate(textRect.topLeft())
painter.setClipRect(textRect.translated(-textRect.topLeft()))
self.doc.documentLayout().draw(painter, ctx)
painter.restore()
def sizeHint(self, option, index):
return QSize(self.doc.idealWidth(), self.doc.size().height())
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
hlay = QtWidgets.QHBoxLayout()
lay = QtWidgets.QVBoxLayout(self)
self.le = QtWidgets.QLineEdit()
self.button = QtWidgets.QPushButton("filter")
self.table = QtWidgets.QTableWidget(5, 5)
hlay.addWidget(self.le)
hlay.addWidget(self.button)
lay.addLayout(hlay)
lay.addWidget(self.table)
self.button.clicked.connect(self.find_items)
self.table.setItemDelegate(HTMLDelegate(self.table))
for i in range(self.table.rowCount()):
for j in range(self.table.columnCount()):
it = QtWidgets.QTableWidgetItem(random.choice(words))
self.table.setItem(i, j, it)
def find_items(self):
text = self.le.text()
# clear
allitems = self.table.findItems("", QtCore.Qt.MatchContains)
selected_items = self.table.findItems(self.le.text(),
QtCore.Qt.MatchContains)
for item in allitems:
item.setData(QtCore.Qt.UserRole, text if item in
selected_items else None)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
But the main problem of this method as you said is changing in font
size and aligning because my data's are Arabic and English.
On Mon, Aug 20, 2018 at 7:15 PM, Maurizio Berti <maurizio.berti at gmail.com>
wrote:
> I'm not an expert on regular expressions, maybe there's a better and
> faster approach than the one I used in the example.
> I initially tried using re.sub, but works correctly only if you want to
> match case, as the substitution string is fixed.
> Anyway, it seems fast enough to me, as the viewport update() takes care of
> repainting only visible elements.
>
> Another (derivate) approach could be subclassing the model too (the data()
> method), adding a custom user role for the html filtered text that can be
> read by the delegate, maybe with some sort of caching in the model to speed
> up reading. It may be slightly faster and more "elegant" (the model takes
> care of the string match, not the delegate), and could be useful for
> further implementation.
>
> I forgot to say: my example obviously doesn't consider spacings, grid
> lines pen width and icon decoration.
>
> Maurizio
>
> Il giorno lun 20 ago 2018 alle ore 16:01 Maziar Parsijani <
> maziar.parsijani at gmail.com> ha scritto:
>
>> Really thanks to Maurizio
>> I will try this.I agree with you and was thinking if someone had a
>> solution with re library and regix could be better for me .
>>
>>
>> On Mon, Aug 20, 2018 at 6:09 PM, Maurizio Berti <maurizio.berti at gmail.com
>> > wrote:
>>
>>> I know you already found a solution, but I decided to give it a try
>>> anyway, just out of curiosity.
>>> I didn't like the idea of using another QWidget, which might involve
>>> QStyle issues, then I found out that it's possible to use QTextDocument.
>>> This is a simple implementation that just matches the text in all items
>>> (no actual search in the model).
>>>
>>>
>>> class MatchDelegate(QtWidgets.QStyledItemDelegate):
>>> regex = re.compile('')
>>> fakeIndex = QtCore.QModelIndex()
>>>
>>> def paint(self, qp, option, index):
>>> self.initStyleOption(option, index)
>>> td = QtGui.QTextDocument()
>>> if self.regex.pattern:
>>> splitted = self.regex.split(option.text)
>>> matches = iter(self.regex.findall(option.text))
>>> text = ''
>>> for words in splitted[:-1]:
>>> text += words + '<b>{}</b>'.format(matches.next())
>>> text += splitted[-1]
>>> else:
>>> text = option.text
>>> td.setHtml(text)
>>> option.text = ''
>>> # Using an invalid index avoids painting of the text
>>> QtWidgets.QStyledItemDelegate.paint(self, qp, option,
>>> self.fakeIndex)
>>> qp.save()
>>> qp.translate(option.rect.topLeft())
>>> td.drawContents(qp, QtCore.QRectF(0, 0, option.rect.width(),
>>> option.rect.height()))
>>> qp.restore()
>>>
>>>
>>> class Widget(QtWidgets.QWidget):
>>> def __init__(self):
>>> [...]
>>> self.delegate = MatchDelegate()
>>> self.table.setItemDelegate(self.delegate)
>>> self.search = QtWidgets.QLineEdit()
>>> self.search.textChanged.connect(self.findText)
>>> [...]
>>>
>>> def findText(self, text):
>>> self.delegate.regex = re.compile(text, re.I)
>>> self.table.viewport().update()
>>>
>>>
>>> Of course it doesn't take the text size change into account whenever
>>> bold characters are in place, so the sizeHint is not perfect. Also, it
>>> might be possible to implement QFontMetrics' elidedText, again with some
>>> small issues about font size changes.
>>>
>>> Maurizio
>>>
>>>
>>> Il giorno lun 20 ago 2018 alle ore 11:31 Maziar Parsijani <
>>> maziar.parsijani at gmail.com> ha scritto:
>>>
>>>> Hi Denis Rouzaud
>>>>
>>>> This question was for 19days ago.But you are correct the best method is
>>>> html delegate and I did it but I couldn't fix that with my table and the
>>>> table was changed but it worked nice.
>>>>
>>>> On Mon, Aug 20, 2018 at 12:28 PM, Denis Rouzaud <
>>>> denis.rouzaud at gmail.com> wrote:
>>>>
>>>>> This is not easily done.
>>>>> You'd have to create a custom delegate using a QLabbel and use html in
>>>>> there.
>>>>>
>>>>> I have been creating a search tool for tables and ending up
>>>>> highlighting the whole cell.
>>>>> The effort and the risk of bad results is just not worth the effort
>>>>> IMHO.
>>>>>
>>>>> Denis
>>>>>
>>>>> Le mar. 31 juil. 2018 à 23:05, Maziar Parsijani <
>>>>> maziar.parsijani at gmail.com> a écrit :
>>>>>
>>>>>> I use method1 to find some text in qtablewidget rows.
>>>>>>
>>>>>> method1 :
>>>>>>
>>>>>> def FindItem(self):
>>>>>> items = self.SuraBRS.findItems(
>>>>>> self.SearchTbox.text(), QtCore.Qt.MatchContains)
>>>>>> if items:
>>>>>> results = '\n'.join(
>>>>>> 'row %d column %d' % (item.row() + 1, item.column() + 1)
>>>>>> for item in items)
>>>>>> else:
>>>>>> results = 'Found Nothing'
>>>>>> print(results)
>>>>>>
>>>>>> Now I want to know how to highlight results or change their color.*I
>>>>>> want to select and highlight that text or character not all of the row or
>>>>>> column*.
>>>>>> _______________________________________________
>>>>>> PyQt mailing list PyQt at riverbankcomputing.com
>>>>>> https://www.riverbankcomputing.com/mailman/listinfo/pyqt
>>>>>
>>>>> --
>>>>>
>>>>> Denis Rouzaud
>>>>> denis at opengis.ch <denis at opengis.ch>
>>>>> +41 76 370 21 22
>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> PyQt mailing list PyQt at riverbankcomputing.com
>>>> https://www.riverbankcomputing.com/mailman/listinfo/pyqt
>>>
>>>
>>>
>>> --
>>> È difficile avere una convinzione precisa quando si parla delle ragioni
>>> del cuore. - "Sostiene Pereira", Antonio Tabucchi
>>> http://www.jidesk.net
>>>
>>
>>
>
> --
> È difficile avere una convinzione precisa quando si parla delle ragioni
> del cuore. - "Sostiene Pereira", Antonio Tabucchi
> http://www.jidesk.net
>
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