Re: [Maya-Python] clicked signals around a QLabel

[Justin Israel]

On Wed, Dec 19, 2018 at 3:13 PM likage  wrote:

> Hi Justin,
>
> jumping back onto this thread... So, I managed to get a QPushButton,
> converted into a QGraphicsProxyWidget, and have it implemented into a
> horizontal QGraphicsLinearLayout together with the title.
>
> But, currently I have an issue where this horizontal layout though is
> being added into a vertical QGraphicsLinearLayout, the button got 'pushed'
> out as I was using `insertStretch` on the title.
> Wondering if you know of any ways in which I can either force a width
> limit, or set the button to a fixed postion?
>

If you want to give me a small code example that I can see, I would be
happy to make suggestions.


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Re: [Maya-Python] clicked signals around a QLabel

[likage]

Hi Justin,

jumping back onto this thread... So, I managed to get a QPushButton, 
converted into a QGraphicsProxyWidget, and have it implemented into a 
horizontal QGraphicsLinearLayout together with the title.

But, currently I have an issue where this horizontal layout though is being 
added into a vertical QGraphicsLinearLayout, the button got 'pushed' out as 
I was using `insertStretch` on the title.
Wondering if you know of any ways in which I can either force a width 
limit, or set the button to a fixed postion?

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Re: [Maya-Python] clicked signals around a QLabel

[Justin Israel]

On Sat, Dec 8, 2018, 8:24 AM likage  wrote:

> I am slightly confused now...
> I apologize in advance, not an excuse but this is my first time dealing
> with QGraphicsXXX and have it integrated with the 'normal' widgets..
>
> In the BaseWidget script - filled_round_rect(), it appears that the icon
> creation is made there and so I added this part in:
>
> def filled_round_rect():
>...
>...
>painter.fillPath(rounded_rect, colour)
>
> # I added the following line
>self.pixmapItem = QtGui.QGraphicsPixmapItem(self.type_icon())
>
> if self.ICON:
>top_right = self.boundingRect().topRight()
>painter.drawPixmap(
>top_right.x() - 35,
>top_right.y() + 5,
>self.pixmapItem # I replace this with self.type_icon()
>)
>
>
> and got the following error... I had thought that it will work, as the
> BaseWidget is within QGraphicsScene?
>
> # TypeError: # 'PySide2.QtGui.QPainter.drawPixmap' called with wrong
> argument types:
> #   PySide2.QtGui.QPainter.drawPixmap(float, float,
> PySide2.QtWidgets.QGraphicsPixmapItem)
> # Supported signatures:
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPoint,
> PySide2.QtGui.QPixmap)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPoint,
> PySide2.QtGui.QPixmap, PySide2.QtCore.QRect)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPointF,
> PySide2.QtGui.QPixmap)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPointF,
> PySide2.QtGui.QPixmap, PySide2.QtCore.QRectF)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRect,
> PySide2.QtGui.QPixmap)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRect,
> PySide2.QtGui.QPixmap, PySide2.QtCore.QRect)
> #   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRectF,
> PySide2.QtGui.QPixmap, PySide2.QtCore.QRectF)
> #   PySide2.QtGui.QPainter.drawPixmap(int, int, PySide2.QtGui.QPixmap)
> #   PySide2.QtGui.QPainter.drawPixmap(int, int, PySide2.QtGui.QPixmap,
> int, int, int, int)
> #   PySide2.QtGui.QPainter.drawPixmap(int, int, int, int,
> PySide2.QtGui.QPixmap)
> #  PySide2.QtGui.QPainter.drawPixmap(int, int, int, int,
> PySide2.QtGui.QPixmap, int, int, int, int)
>

Sorry, I had misunderstood part of your previous question based on your
original example of wanting to do a clickable icon with a Qlabel or
Qpushbutton. And I thought you were trying to integrate QWidget into
QGraphicsScene. It is still true that you should avoid them as much as
possible and do all drawing through QGraphicsItem classes.

Your current error is exactly what the exception says. You can't pass a
QGraphics item to the QPainter draw like that. You don't even need a custom
draw call if you are using a QGraphicsPixmapItem for your icon. Just add it
as a child to your item and position it where it needs to go. It will draw
itself and also give you the mouse press handler for its bounds.
Otherwise if you continue drawing your own pixmap (which is fine) then you
have to handle the mouse press in that main item and test if it hits the
bounds for the icon you drew. I find it's a bit easier if the items are
just composed and encapsulate their own event handling. Just think of
parent-child composition with QGraphicsItems

Hope that makes sense.


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Re: [Maya-Python] clicked signals around a QLabel

[likage]

I am slightly confused now...
I apologize in advance, not an excuse but this is my first time dealing 
with QGraphicsXXX and have it integrated with the 'normal' widgets..

In the BaseWidget script - filled_round_rect(), it appears that the icon 
creation is made there and so I added this part in:

def filled_round_rect():
   ...
   ...
   painter.fillPath(rounded_rect, colour)

# I added the following line
   self.pixmapItem = QtGui.QGraphicsPixmapItem(self.type_icon())

if self.ICON:
   top_right = self.boundingRect().topRight()
   painter.drawPixmap(
   top_right.x() - 35,
   top_right.y() + 5,
   self.pixmapItem # I replace this with self.type_icon()
   )


and got the following error... I had thought that it will work, as the 
BaseWidget is within QGraphicsScene?

# TypeError: # 'PySide2.QtGui.QPainter.drawPixmap' called with wrong 
argument types:
#   PySide2.QtGui.QPainter.drawPixmap(float, float, 
PySide2.QtWidgets.QGraphicsPixmapItem)
# Supported signatures:
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPoint, 
PySide2.QtGui.QPixmap)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPoint, 
PySide2.QtGui.QPixmap, PySide2.QtCore.QRect)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPointF, 
PySide2.QtGui.QPixmap)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QPointF, 
PySide2.QtGui.QPixmap, PySide2.QtCore.QRectF)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRect, 
PySide2.QtGui.QPixmap)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRect, 
PySide2.QtGui.QPixmap, PySide2.QtCore.QRect)
#   PySide2.QtGui.QPainter.drawPixmap(PySide2.QtCore.QRectF, 
PySide2.QtGui.QPixmap, PySide2.QtCore.QRectF)
#   PySide2.QtGui.QPainter.drawPixmap(int, int, PySide2.QtGui.QPixmap)
#   PySide2.QtGui.QPainter.drawPixmap(int, int, PySide2.QtGui.QPixmap, int, 
int, int, int)
#   PySide2.QtGui.QPainter.drawPixmap(int, int, int, int, 
PySide2.QtGui.QPixmap)
#  PySide2.QtGui.QPainter.drawPixmap(int, int, int, int, 
PySide2.QtGui.QPixmap, int, int, int, int)


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Re: [Maya-Python] clicked signals around a QLabel

[Justin Israel]

Well you can't put a normal QWidget into a QGraphicsScene unless you wrap
it in a QGraphicsProxyWidget
. But if you
start doing this a lot then you are going to start reducing your
performance back towards a normal QWidget setup. It would be better to just
implement your own clickable icon item with a QGraphicsPixmapItem
.

Best to avoid QWidget as much as possible if you are in a QGraphicsScene.
Usually they are only used in proxies when you really need to integrate
existing widgets.

Justin


On Fri, Dec 7, 2018 at 11:32 AM likage  wrote:

> Hi Justin,
>
> Thank you for getting back. I had thought using the above example may help
> me out but turns out not. :(
> And so, I have decided to paste the code here in hopes of some guidance/
> insights if any...
>
> BaseWidget 
> GraphicsWidget 
>
> [image: example_widget.jpg]
> The above 2 codes are used to created a widget (see attached) where I am
> trying to induce a 'clicked' connection towards that play icon.
>
> And it appears that I am unable to use either QPushButton or a QLabel to
> replace it, by doing so, it will cause an error.
>
>
>
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Re: [Maya-Python] clicked signals around a QLabel

[likage]

Hi Justin,

Thank you for getting back. I had thought using the above example may help 
me out but turns out not. :(
And so, I have decided to paste the code here in hopes of some guidance/ 
insights if any...

BaseWidget 
GraphicsWidget 

[image: example_widget.jpg]
The above 2 codes are used to created a widget (see attached) where I am 
trying to induce a 'clicked' connection towards that play icon.

And it appears that I am unable to use either QPushButton or a QLabel to 
replace it, by doing so, it will cause an error.



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Re: [Maya-Python] clicked signals around a QLabel

[Justin Israel]

This is caused by the fact that the event handling is on the QLabel and
even though you think you are clicking on blank space, its just the part of
the QLabel where the image no longer covers. You have the QLabel inside of
a layout, which means it will expand when you resize the parent widget. So
you have a couple options here.

1) You can set label.setScaledContents(True) and have the icon resize to
always fit the QLabel,

2) You can set the QLabel to not resize. This is done by calling
label.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed)
It also means you will have gap between the button and image, so you could
also call layout.addStretch() after adding them, to keep them pinned to the
top.

Justin


On Fri, Dec 7, 2018 at 8:59 AM likage  wrote:

> Hi all,
>
> I am trying to create a 'clicked' signal where it will only be triggered
> if User clicks anywhere within the icon.
> In the following code:
>
> class TestWin(QtGui.QWidget):
> def __init__(self, parent=None):
> super(TestWin, self).__init__(parent)
> self.init_ui()
>
> def init_ui(self):
>
> lyt = QtGui.QVBoxLayout()
> btn = QtGui.QPushButton('test button')
>
> lbl = QtGui.QLabel()
> icon_path = '/Desktop/people.png'
> lbl.setPixmap(icon_path)
>
> lyt.addWidget(btn)
> lyt.addWidget(lbl)
>
> self.setLayout(lyt)
>
> # Signals
> btn.clicked.connect(self.btn_click)
> lbl.mousePressEvent = self.lbl_click
>
> def btn_click(self):
> print 'I am clicking on the button...'
>
> def lbl_click(self, event):
> print 'I am clicking on the label...'
>
>
> my_win = TestWin()
> my_win.show()
>
> As soon as I resize the window bigger, clicking on any blank space will
> still prints the message 'I am clicking on the label'
>
> I also tried using event filtering where as follows:
>
> class TestWin(QtGui.QWidget):
> def __init__(self, parent=None):
> super(TestWin, self).__init__(parent)
> self.init_ui()
>
> def init_ui(self):
> ...
> ...
>
> # Signals
> btn.clicked.connect(self.btn_click)
> lbl.installEventFilter(self)
>
> def btn_click(self):
> ...
>
> def eventFilter(self, source, event):
> if event.type() == QtCore.QEvent.MouseButtonPress:
> print "The sender is:", source.text() # Returns me blank
> return super(TestWin, self).eventFilter(source, event)
>
> but the `source.text()` is returning me nothing.
>
> Any insights are appreciated!
>
>
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