Pyside Houdini Freeze

[asnowcappedromance]

Hi guys,

 

I started to play around a bit with pyside in Houdini, but when I put the following script in a shelf tool, my Houdini just freezes.

 

import sys

import PySide
from PySide import QtGui
from PySide import QtCore
from PySide.QtGui import QApplication, QPushButton
from PySide.QtGui import QMessageBox

app = QtGui.QApplication.instance()

#wid = QtGui.QWidget()
wid = QtGui.QLabel()
wid.resize(250, 150)
wid.setWindowTitle('Simple')
wid.setText("hello Manu")
wid.show()
wid.activateWindow()

app.exec_()
#sys.exit( app.exec_() )

 

Any idea how to fix this?

 

Thanks,

Manu

[Alexey Vanzhula]

just remove app.exec_() because H14\15 is a Qt application and it doesn't need to run exec_ func.

Edited October 29, 2015 by Alexey Vanzhula

[Alexey Vanzhula]

wid.activateWindow()  is also excess in your example

Edited October 29, 2015 by Alexey Vanzhula

[asnowcappedromance]

wid.activateWindow()  is also excess in your example

 

Hi Alexey, 

 

Thanks for your reply!

If I remove app.exec_() and activateWindow()

then the widget doesn't pop up anymore, my simple code looks like this now:

-------------------------------------

import PySide

from PySide import QtGui

wid = QtGui.QLabel()

wid.resize(250, 150)

wid.setWindowTitle('Simple')

wid.setText("hello Manu")

wid.show()

--------------------------------- 

 

Cheers,

Manu

[Alexey Vanzhula]

So, I think, they changed Qt widgets behavior in H15. This example works on my linux.

import PySide.QtGui as qtg
import PySide.QtCore as qtc

app = qtg.QApplication.instance()
cursor_pos = qtg.QCursor().pos()
parent = app.topLevelAt(cursor_pos)

label = qtg.QLabel('Hello World!', parent)
label.setWindowFlags(qtc.Qt.Window)
label.show()

I think widgets needs to set parent explicitly.

label.setWindowFlags(qtc.Qt.Window) will set widget as separate window.

Hope this helps.
 

[Alexey Vanzhula]

import PySide
from PySide import QtGui

What is this?

 

 

 

This will work also:

from PySide import QtGui

 

[asnowcappedromance]

Thanks, that totally works now!!

I'm using H14 right now by the way.

 

I also could get this cookbook example to work, where they don't use the QGuiApplication 'toplevelat' function,

but instead wrap the code in a class:

http://www.sidefx.com/docs/houdini14.0/hom/cookbook/qt/

[Alexey Vanzhula]

Yes, but Qdialog(QFontDialog , etc) is notthe same as QWidget(Qlabel etc), because it waits for your choice 

Edited October 30, 2015 by Alexey Vanzhula

[Alexey Vanzhula]

Recently your first example (but wihout app.exec_()) would have worked in previous H14 builds. But not now, as I see)

[asnowcappedromance]

Good stuff Alexey!

Starting to get a lot of things to work now with Pyside!

 

Another issue I had was that I wasn't able to resize my fonts when running Pyside in Houdini/

Consider the following test:

import PySide.QtGui as qtg
import PySide.QtCore as qtc


class myClassTest(qtg.QWidget):
    """A test class for a widget"""
    
    def __init__(self):
        app = qtg.QApplication.instance()
        cursor_pos = qtg.QCursor().pos()
        parent = app.topLevelAt(cursor_pos)
        
        qtg.QWidget.__init__(self, parent)
        self.setMinimumSize(500,500)
        self.setWindowTitle("this is a test")
        self.setWindowFlags(qtc.Qt.Window)  
        
        self.header = qtg.QLabel("Hello World what's up:", self)
        self.header.move(10, 10)
        self.header.setFont( qtg.QFont( "Georgia", 140) )
                
    def run(self):
        self.show()

test =myClassTest()
test.run()
    

Any idea why the text is still displayed super small? No matter which value I put in there, the size always stays the same.

Does this have anything to do with the Global Ui Size in the Houdini preferences?

Thanks for you help!

[Guest mantragora]

from PySide import QtCore

from PySide import QtGui

class HOUWidget(QtGui.QWidget):

def __init__(self, parent = None):

super(HOUWidget, self).__init__(parent)

self.setMinimumSize(500,500)

self.setWindowTitle("this is a test")

self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)

layout = QtGui.QVBoxLayout()

layout.setAlignment(QtCore.Qt.AlignTop | QtCore.Qt.AlignLeft)

headerStyleSheet = 'font-size: 20px; font-family: Georgia;'

header = QtGui.QLabel("Hello World what's up:")

header.setStyleSheet(headerStyleSheet)

layout.addWidget(header)

self.setLayout(layout)

test = HOUWidget()

test.show()

Edited October 30, 2015 by fântastîque Mântragorîè

[asnowcappedromance]

Nice!! Thanks for the reply!

[asnowcappedromance]

so I ran into another PySide problem ... Maybe one of you can enlighten me on what I'm doing wrong with this one?

I'm trying to use the QtGui.setStyle() function in order to change the style of my GUI.

Turns out, no matter what preset I use, it all looks the same. (Using Windows7).

(Attached a screenshot)

 

Here's the code I'm running in a shelf tool:

from PySide import QtGui, QtCore

class Window(QtGui.QWidget):
    """A setStyle() test"""
    
    def __init__(self):
        super(Window, self).__init__()
        self.setGeometry(50, 50, 500, 300)
        self.setWindowTitle("PyQT tuts!")        
        self.home()
        
    def customHandler(self,  ErrorType, ErrorContext ):
        #print "Type:", ErrorType
        #print "error:", type(ErrorContext)
        pass

    def home(self):

        btn = QtGui.QPushButton("Test Button")

        styleChoice = QtGui.QLabel("Windows Vista")
        
        comboBox = QtGui.QComboBox()
        comboBox.addItem("motif")
        comboBox.addItem("Windows")
        comboBox.addItem("cde")
        comboBox.addItem("Plastique")
        comboBox.addItem("Cleanlooks")
        comboBox.addItem("windowsvista")
        comboBox.activated.connect(lambda: self.style_choice(comboBox, styleChoice))
        
        QtCore.qInstallMsgHandler(self.customHandler)
        
        qvbox = QtGui.QVBoxLayout()
        qvbox.addWidget(btn)
        qvbox.addWidget(comboBox)
        qvbox.addWidget(styleChoice)
        self.setLayout(qvbox)

    def style_choice(self, comboBox, widget):
        cur_str = comboBox.currentText()
        widget.setText(cur_str)
        QtGui.QApplication.setStyle(QtGui.QStyleFactory.create(cur_str))
                    
    def run(self):
        self.show()

main = Window()
main.run()

Thanks a bunch!

Cheers!

[Stalkerx777]

so I ran into another PySide problem ... Maybe one of you can enlighten me on what I'm doing wrong with this one?

I'm trying to use the QtGui.setStyle() function in order to change the style of my GUI.

Turns out, no matter what preset I use, it all looks the same. (Using Windows7).

 

I'm not sure you'll be able to use QStyle this way, better try to do this: QWidget.setStyleSheet(hou.ui.qtStyleSheet())

[asnowcappedromance]

I'm not sure you'll be able to use QStyle this way, better try to do this: QWidget.setStyleSheet(hou.ui.qtStyleSheet())

Hi Alexey,

Thanks for the reply. The problem is that I think by default QWidgets in PySide Houdini already use the hou.ui.qtStyleSheet() because when I apply this in Houdini 15 to my QWidget, the look doesn't change either, there is no difference at all to the jpg that I posted before. Is your GUI look changing when you set the Style Sheet like that?

Setting it to something like 'setStyleSheet("background-color: #00FF00; color: #FFFFFF")' makes a big difference on the other hand.

Cheers!