Figured another one out thanks to Stackoverflow.
https://stackoverflow.com/questions/43454882/paint-over-qlabel-with-pyqt
My paintEvent was done on QWidget, which was behind QLabel. Once the QLabel
got stylesheet'd it covered up my image I suppose. So paintEvent needed to
be implemented on the
Ran into a problem. When I set qdarkstyle, the images no longer showed up.
Neither load_stylesheet nor load_stylesheet_pyside worked.
environ['QT_API'] = 'pyside'
app = QApplication(sys.argv)
app.setStyleSheet(qdarkstyle.load_stylesheet())
SCRUB = ScrubbaleImageSequenceWidget(images)
# SCRUB =
QPixmapCache is a good candidate if you want to preload your images. There
is already a global cache that gets used anyways when you load QPixmaps
from files. You can insert them ahead of time if you want:
https://doc-snapshots.qt.io/qtforpython/PySide2/QtGui/QPixmapCache.html
When you load your
By the way I went with QPainter because it's the only way I could find how
to control opacity. Is opacity possible if I use QPixmap?
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Thank you everyone for your help. Learned a lot from this simple widget.
My current working code. If there's any room for adjustment please let me
know :)
Been thinking that it would be great to pre-load image sequences in advance.
Maybe create pixmap for each of them and store in a list?
#
You have two options two choose from, but you are actually currently doing
a mixture of both.
1) use a QPainter(self) (as per your example) and paint the icon manually,
from your stored self.pic. If you do this, you need to not set the pixmap
onto the QLabel, otherwise you will get the paint
I see. Thank you again Justin.
Moving to another functionality. I want to add a default icon with lowered
opacity when calling without passing images attribute. It is hard-coded
right now.
if not images or not isinstance(images, list):
self.disable = True
self.images =
self.pic.scaled() returns a new scalled QPixmap instance. So calling it the
way you doing is having no actual effect. You aren't doing anything with
the return value. That is why you have to pass a new scaled QPixmap into
the QLabel, which retains the aspect ratio.
Justin
On Tue, Jun 26, 2018
Thank you Justin. Wow so by setting minimal size it allows going smaller. I
wouldn't have suspected that.
By the way is it OK to call setPixmap over and over like I did in
resizeEvent? It seems a bit redundant.
def resizeEvent(self, event):
self.label.setPixmap(
That works. Thanks Justin.
At the moment I do setPixmap repeatedly on resizeEvent. Is that normal? I
tried self.pic.scaled and self.label.repaint but those 2 don't seem to have
any effect.
Not working
def resizeEvent(self, event):
self.pic.scaled(self.label.width(), self.label.height(),
On Tue, Jun 26, 2018, 12:39 AM Panupat Chongstitwattana
wrote:
> Question on Pixmap resizing.
>
> I tried switching from fixed size to allow resizing.
> This is what I have at the moment and what happens is that I can increase
> my widget size,
> but it won't let me decrease. How should I
On Tue, Jun 26, 2018, 12:32 AM Panupat Chongstitwattana
wrote:
> Thank you for your suggestion Justin. Did you mean the mouseMoveEvent
> method? Made some adjustments and is working as intended.
>
Yep, that was what I meant. In a previous example you had alot of repeat
checking of the event
Question on Pixmap resizing.
I tried switching from fixed size to allow resizing.
This is what I have at the moment and what happens is that I can increase
my widget size,
but it won't let me decrease. How should I approach this?
in __init__
self.pic = QPixmap(self.images[self.image_index])
#
Thank you for your suggestion Justin. Did you mean the mouseMoveEvent
method? Made some adjustments and is working as intended.
def mouseMoveEvent(self, event):
if not self.tracking:
return
distance = self.mouse_start - event.x()
if distance >= self.mouse_threshold:
One last tip about the event handlers. It might be good for you to make use
of if/elif instead of comparing extra cases that will never be true since
another event is going to match. It's just wasteful comparisons.
Justin
On Mon, Jun 25, 2018, 7:30 PM Marcus Ottosson
wrote:
> Sometimes. In the
Sometimes. In the case of closeEvent, calling it would close the GUI I
think so you’d probably want your code to run first. In general, it depends
on whether you want something done before or after the superclass
implementation. In your case, someone overriding your mouseMoveEvent would
have to
I see. Does it matter if you call super first thing or last thing in the
method override?
On Monday, June 25, 2018 at 2:14:36 PM UTC+7, Marcus Ottosson wrote:
>
> You are most welcome.
>
> in what instances would you want, or need, to do that?
>
> If you’re inheriting from a class that already
You are most welcome.
in what instances would you want, or need, to do that?
If you’re inheriting from a class that already subclasses those, it’d be
useful for when you want to add to the original behavior. Otherwise you’d
be replacing it. For example, anyone inheriting from the class you’re
Thank you Marcus. Here's the updated methods and it's working as intended.
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self.mouse_start = event.x()
self.tracking = True
def mouseReleaseEvent(self, event):
if event.button() ==
Using an event filter is a little heavy handed for what you’re trying to
achieve, I think.
The problem with it is that every event, including draw events, passes
through your event filter waiting for it to either block the event - return
True - or pass it through - return False. And the number of
Got it working now with more returns added to the eventFilter.
def eventFilter(self, obj, event):
if event.type() == event.MouseButtonPress:
if event.button() == QtCore.Qt.LeftButton:
self.mouse_start = event.x()
self.tracking = True
event.accept()
Thank you for your suggestion Marcus.
I added MouseButtonPress and MouseButtonRelease event based on your
suggestion and it almost work. I cannot get the image to repaint. It prints
out the image name correctly however.
I way to get the repaint working is to remove return True (line 51) from
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