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List: pykde
Subject: Re: [PyQt] Show tooltip onto QLabel
From: Maurizio Berti <maurizio.berti () gmail ! com>
Date: 2019-01-22 19:00:04
Message-ID: CAPn+-XTF=-N5FWikUkb231W=p8uezsEfmDQ9Q=ooV_Df0q0Jhg () mail ! gmail ! com
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[Attachment #2 (multipart/alternative)]
Glad I could help!
I've never used HoverEvents, but if it suits your needs, that's ok :-)
Yes, another issue with QToolTip is the delay after their event is called.
Since Qt5 it can be customized, though, by setting a QProxyStyle that
returns the timeout in milliseconds when SH_ToolTip_WakeUpDelay styleHint
is requested.
This is a small example that allows you to set a 0 timeout for specific
widgets:
class MyStyle(QtWidgets.QProxyStyle):
toolTipTimeouts = {}
def styleHint(self, hint, option, widget, returnData):
if hint == QtWidgets.QStyle.SH_ToolTip_WakeUpDelay:
try:
return self.toolTipTimeouts[widget]
except:
pass
return QtWidgets.QProxyStyle.styleHint(self, hint, option, widget,
returnData)
class MyWindow(QtWidgets.QMainWindow):
def __init__(self):
[...]
self.widget = SomeWidget()
self.style().toolTipTimeouts[self.widget] = 0
#optional, if you need to remove widgets at a certain point,
#allowing the garbage collector to free up memory
self.widget.destroyed.connect(self.style().toolTipTimeouts.pop)
app = QtWidgets.QApplication(sys.argv)
app.setStyle(MyStyle())
In this way the QProxyStyle will immediately call the QEvent.ToolTip for
the specified widgets.
Maurizio
Il giorno mar 22 gen 2019 alle ore 16:21 Tong Zhang <warriorlance@gmail.com>
ha scritto:
> Thanks, Maurizio! I've got what I want from your message, BTW, I used
> hover event to trig the help message to show on a textedit, since I
> found tooltip event responses a little bit slower than I want, maybe
> there is someway to speed up.
>
> Tong
>
> On 1/21/19 6:40 PM, Maurizio Berti wrote:
> > Using standard tooltips might be an issue in some (not so special)
> > cases, as QToolTip events are strictly related to the widget events, so
> > you'll need to install an eventFilter on every single widget you'll want
> > the behavior you ask about.
> > A simple implementation would be something like this:
> >
> > def __init__(self, *args, **kwargs):
> > [...]
> > self.toolTipWidget = QtWidgets.QLabel()
> > [...]
> > self.someWidget = SomeWidget()
> > self.someWidget.setToolTip('I am a tooltip!')
> > self.someWidget.installEventFilter(self)
> > [...]
> >
> > def eventFilter(self, source, event):
> > if event.type() == QtCore.QEvent.ToolTip:
> > self.toolTipWidget.setText(source.toolTip())
> > return QtWidgets.QWidget.eventFilter(self, source, event)
> >
> > On the other hand, I'd suggest to use the StatusTip instead of the
> > ToolTip: it's something I've successfully used for something similar to
> > your needs: in this way you can keep the StatusTip for "simple" tooltip
> > text and the ToolTips for further customized messages, as they also
> > allow rich text content.
> > Here's a small example:
> >
> > def __init__(self, *args, **kwargs):
> > [...]
> > self.toolTipWidget = QtWidgets.QLabel()
> > [...]
> > self.someWidget = SomeWidget()
> > self.someWidget.setStatusTip('I am a statustip!')
> > [...]
> >
> > def event(self, event):
> > if event.type() == QtCore.QEvent.StatusTip and event.tip():
> > self.toolTipWidget.setText(event.tip())
> > return QtWidgets.QWidget.event(self, event)
> >
> > Note that here I used the setStatusTip() method instead of the
> > setToolTip() one.
> > Obviously, if you're using Designer you'll set the StatusTip property
> > from there, instead of the ToolTip property.
> >
> > How does it work?
> > Usually the StatusTip is only used on a QMainWindow with a QStatusBar
> > installed, but, interestingly enough, the event() method of *any* widget
> > can be used to catch /any/ StatusTip event called from both that widget
> > /and/ its children.
> >
> > In both cases you'd better think about a way to "clear" the tool/status
> > tip, as leaving it there might be confusing.
> > If you don't have too many widgets, the eventFilter way might be a good
> > solution, as you can also catch the QEvent.Leave event type to hide the
> > "tooltip" by clearing the label text, otherwise it's probably
> > better using a QTimer on the parent widget or the label, and set it as
> > singleShot (don't use the static method, as it could hide a new
> > statustip activated in the meantime), then connect it to something like
> > lambda: self.toolTipWidget.setText('')whenever you catch the StatusTip
> > event.
> >
> > If for some reason you'll need to stick with ToolTips, there's a
> > solution anyway.
> > If all widgets already have their tooltips, and the layout is static and
> > permanent once the main parent widget is being instantiated, just use
> > the children() iterator and check for both isWidgetType() and toolTip()
> > contents: if those condition match, install the eventFilter; if the
> > layout is dynamic instead, use the childEvent method on the parent and
> > check for QEvent.childAdded and QEvent.childRemoved events, then use
> > installEventFilter or removeEventFilter respectively.
> >
> > Regards,
> > Maurizio
> >
> >
> > Il giorno lun 21 gen 2019 alle ore 23:22 Tong Zhang
> > <warriorlance@gmail.com <mailto:warriorlance@gmail.com>> ha scritto:
> >
> > Hello,
> >
> > Can I show the tooltip of some widget onto a QLabel? e.g. Tooltip
> > will show when I move the mouse onto the pushbutton, how about show
> > the tooltip on another widget, say label?
> >
> > Thanks,
> > Tong
> > _______________________________________________
> > PyQt mailing list PyQt@riverbankcomputing.com
> > <mailto:PyQt@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
[Attachment #5 (text/html)]
<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div \
dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Glad I could \
help!</div><div dir="ltr">I've never used HoverEvents, but if it suits your \
needs, that's ok :-)</div><div dir="ltr"><br></div><div dir="ltr">Yes, another \
issue with QToolTip is the delay after their event is called.<br>Since Qt5 it can be \
customized, though, by setting a QProxyStyle that returns the timeout in milliseconds \
when SH_ToolTip_WakeUpDelay styleHint is requested.</div><div>This is a small example \
that allows you to set a 0 timeout for specific \
widgets:</div><div><br></div><div><div><font face="monospace, monospace">class \
MyStyle(QtWidgets.QProxyStyle):</font></div><div><font face="monospace, monospace"> \
toolTipTimeouts = {}</font></div><div><font face="monospace, monospace"> def \
styleHint(self, hint, option, widget, returnData):</font></div><div><font \
face="monospace, monospace"> if hint == \
QtWidgets.QStyle.SH_ToolTip_WakeUpDelay:<br></font></div><div><font face="monospace, \
monospace"> try:</font></div><div><font face="monospace, monospace"> \
return self.</font><span \
style="font-family:monospace,monospace">toolTipTimeouts[widget]</span></div><div><span \
style="font-family:monospace,monospace"> \
except:</span></div><div><font face="monospace, monospace"> \
pass</font></div><div><font face="monospace, monospace"> return \
QtWidgets.QProxyStyle.styleHint(self, hint, option, widget, </font><span \
style="font-family:monospace,monospace">returnData</span><font face="monospace, \
monospace">)</font></div></div><div><font face="monospace, \
monospace"><br></font></div><div><font face="monospace, monospace">class \
MyWindow(QtWidgets.QMainWindow):</font></div><div><font face="monospace, monospace"> \
def __init__(self):</font></div><div><font face="monospace, monospace"> \
[...]</font></div><div><font face="monospace, monospace"> self.widget = \
SomeWidget()</font></div><div><font face="monospace, monospace"> \
self.style()</font><font face="monospace, monospace">.</font><span \
style="font-family:monospace,monospace">toolTipTimeouts[</span><font face="monospace, \
monospace">self.widget] = 0</font><br></div><div><font face="monospace, monospace"> \
#optional, if you need to remove widgets at a certain point, </font></div><div><font \
face="monospace, monospace"> #allowing the garbage collector to free up \
memory</font></div><div><font face="monospace, monospace"> \
self.widget.destroyed.connect(self.style().toolTipTimeouts.pop)</font></div><div><font \
face="monospace, monospace"><br></font></div><div><div><font face="monospace, \
monospace">app = QtWidgets.QApplication(sys.argv)</font></div><div><font \
face="monospace, monospace">app.setStyle(MyStyle())</font></div></div><div><font \
face="monospace, monospace"><br></font></div><div><font face="arial, helvetica, \
sans-serif">In this way the QProxyStyle will immediately call the QEvent.ToolTip for \
the specified widgets.</font></div><div><font face="arial, helvetica, \
sans-serif"><br></font></div><div><font face="arial, helvetica, \
sans-serif">Maurizio</font></div></div></div></div></div></div></div></div></div></div><br><div \
class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno mar 22 gen 2019 alle \
ore 16:21 Tong Zhang <<a \
href="mailto:warriorlance@gmail.com">warriorlance@gmail.com</a>> ha \
scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px \
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Thanks, Maurizio! \
I've got what I want from your message, BTW, I used <br> hover event to trig the \
help message to show on a textedit, since I <br> found tooltip event responses a \
little bit slower than I want, maybe <br> there is someway to speed up.<br>
<br>
Tong<br>
<br>
On 1/21/19 6:40 PM, Maurizio Berti wrote:<br>
> Using standard tooltips might be an issue in some (not so special) <br>
> cases, as QToolTip events are strictly related to the widget events, so <br>
> you'll need to install an eventFilter on every single widget you'll want \
<br> > the behavior you ask about.<br>
> A simple implementation would be something like this:<br>
> <br>
> def __init__(self, *args, **kwargs):<br>
> [...]<br>
> self.toolTipWidget = QtWidgets.QLabel()<br>
> [...]<br>
> self.someWidget = SomeWidget()<br>
> self.someWidget.setToolTip('I am a tooltip!')<br>
> self.someWidget.installEventFilter(self)<br>
> [...]<br>
> <br>
> def eventFilter(self, source, event):<br>
> if event.type() == QtCore.QEvent.ToolTip:<br>
> self.toolTipWidget.setText(source.toolTip())<br>
> return QtWidgets.QWidget.eventFilter(self, source, event)<br>
> <br>
> On the other hand, I'd suggest to use the StatusTip instead of the <br>
> ToolTip: it's something I've successfully used for something similar to \
<br> > your needs: in this way you can keep the StatusTip for "simple" \
tooltip <br> > text and the ToolTips for further customized messages, as they also \
<br> > allow rich text content.<br>
> Here's a small example:<br>
> <br>
> def __init__(self, *args, **kwargs):<br>
> [...]<br>
> self.toolTipWidget = QtWidgets.QLabel()<br>
> [...]<br>
> self.someWidget = SomeWidget()<br>
> self.someWidget.setStatusTip('I am a statustip!')<br>
> [...]<br>
> <br>
> def event(self, event):<br>
> if event.type() == QtCore.QEvent.StatusTip and event.tip():<br>
> self.toolTipWidget.setText(event.tip())<br>
> return QtWidgets.QWidget.event(self, event)<br>
> <br>
> Note that here I used the setStatusTip() method instead of the <br>
> setToolTip() one.<br>
> Obviously, if you're using Designer you'll set the StatusTip property \
<br> > from there, instead of the ToolTip property.<br>
> <br>
> How does it work?<br>
> Usually the StatusTip is only used on a QMainWindow with a QStatusBar <br>
> installed, but, interestingly enough, the event() method of *any* widget <br>
> can be used to catch /any/ StatusTip event called from both that widget <br>
> /and/ its children.<br>
> <br>
> In both cases you'd better think about a way to "clear" the \
tool/status <br> > tip, as leaving it there might be confusing.<br>
> If you don't have too many widgets, the eventFilter way might be a good <br>
> solution, as you can also catch the QEvent.Leave event type to hide the <br>
> "tooltip" by clearing the label text, otherwise it's probably <br>
> better using a QTimer on the parent widget or the label, and set it as <br>
> singleShot (don't use the static method, as it could hide a new <br>
> statustip activated in the meantime), then connect it to something like <br>
> lambda: self.toolTipWidget.setText('')whenever you catch the StatusTip \
<br> > event.<br>
> <br>
> If for some reason you'll need to stick with ToolTips, there's a <br>
> solution anyway.<br>
> If all widgets already have their tooltips, and the layout is static and <br>
> permanent once the main parent widget is being instantiated, just use <br>
> the children() iterator and check for both isWidgetType() and toolTip() <br>
> contents: if those condition match, install the eventFilter; if the <br>
> layout is dynamic instead, use the childEvent method on the parent and <br>
> check for QEvent.childAdded and QEvent.childRemoved events, then use <br>
> installEventFilter or removeEventFilter respectively.<br>
> <br>
> Regards,<br>
> Maurizio<br>
> <br>
> <br>
> Il giorno lun 21 gen 2019 alle ore 23:22 Tong Zhang <br>
> <<a href="mailto:warriorlance@gmail.com" \
target="_blank">warriorlance@gmail.com</a> <mailto:<a \
href="mailto:warriorlance@gmail.com" \
target="_blank">warriorlance@gmail.com</a>>> ha scritto:<br> > <br>
> Hello,<br>
> <br>
> Can I show the tooltip of some widget onto a QLabel? e.g. Tooltip<br>
> will show when I move the mouse onto the pushbutton, how about show<br>
> the tooltip on another widget, say label?<br>
> <br>
> Thanks,<br>
> Tong<br>
> _______________________________________________<br>
> PyQt mailing list <a href="mailto:PyQt@riverbankcomputing.com" \
target="_blank">PyQt@riverbankcomputing.com</a><br> > <mailto:<a \
href="mailto:PyQt@riverbankcomputing.com" \
target="_blank">PyQt@riverbankcomputing.com</a>><br> > <a \
href="https://www.riverbankcomputing.com/mailman/listinfo/pyqt" rel="noreferrer" \
target="_blank">https://www.riverbankcomputing.com/mailman/listinfo/pyqt</a><br> > \
<br> > <br>
> <br>
> -- <br>
> È difficile avere una convinzione precisa quando si parla delle ragioni <br>
> del cuore. - "Sostiene Pereira", Antonio Tabucchi<br>
> <a href="http://www.jidesk.net" rel="noreferrer" \
target="_blank">http://www.jidesk.net</a><br> </blockquote></div><br \
clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">È difficile \
avere una convinzione precisa quando si parla delle ragioni del cuore. - \
"Sostiene Pereira", Antonio Tabucchi<br><a href="http://www.jidesk.net" \
target="_blank">http://www.jidesk.net</a></div>
[Attachment #6 (text/plain)]
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