Re: [PyQt] PyQt4 question about type-to-select in numeric drop-down lists
On Tue, Aug 27, 2013 at 9:44 PM, David Boddie da...@boddie.org.uk wrote: On Tue Aug 27 15:53:59 BST 2013, Sarah Mount wrote: sorry if this is a bit of a n00b question, but hopefully someone can clarify a misunderstanding for me. I am working with some colleagues on a Python2.x PyQt4 project and the GUI for this software has several drop-down lists where each entry in the list is an integer, in numerical order. We have had a (reproducible) bug report about these. No problem. Sometimes what seems to be the simplest things can have surprising behaviour. Indeed :) When a user clicks on the drop-down and types a number, the drop-down scrolls to select that number. So, [contrived example] if the drop-down contains entries 0-1000 and the user types 23, the drop-down scrolls to reveal 23 (if necessary) and selects that entry on the list. So far, so standard. If the user selects a number with repeated digits, i.e. any multiple of 11 (in reality only tested on numbers 100) the wrong number is selected. For example, if I open a drop-down and type 77 70 gets selected. Is this some obvious bug in the way we have configured our GUI or have I misunderstood something really basic? No, I think it's a bug in Qt, and probably in QAbstractItemView because that's what is providing the underlying list logic in the drop-down menu. The behaviour seems to be that the string used to search the data is checked to see if it is simply the same first character repeated throughout the string (e.g., aaa or 333) and handled specially. This seems to completely break the regular behaviour: if you try 77, it won't work, but 776 will cause it to navigate to the correct item. That makes sense. Is there an issue tracker I can submit this to? If anyone wants to sanity check my reasoning, I think the problem is in QAbstractItemView::keyboardSearch(). I can't immediately suggest a workaround. My instinct would be to use a completer to influence the way QComboBox finds items but I don't know if that will help, especially when the drop-down is open. I think in reality it is not a huge issue for users, although it's not ideal. I would guess that most integer input is probably not appropriately done with drop-downs! Thanks, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] PyQt4 question about type-to-select in numeric drop-down lists
Hi everyone, sorry if this is a bit of a n00b question, but hopefully someone can clarify a misunderstanding for me. I am working with some colleagues on a Python2.x PyQt4 project and the GUI for this software has several drop-down lists where each entry in the list is an integer, in numerical order. We have had a (reproducible) bug report about these. When a user clicks on the drop-down and types a number, the drop-down scrolls to select that number. So, [contrived example] if the drop-down contains entries 0-1000 and the user types 23, the drop-down scrolls to reveal 23 (if necessary) and selects that entry on the list. So far, so standard. If the user selects a number with repeated digits, i.e. any multiple of 11 (in reality only tested on numbers 100) the wrong number is selected. For example, if I open a drop-down and type 77 70 gets selected. Is this some obvious bug in the way we have configured our GUI or have I misunderstood something really basic? Thanks, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Possible bug in QScinitlla annotations
Hi everyone, I have a GUI (PyQt4, Qt4.7.2, Python2.7, QtDesigner 4.7.2, Ubuntu Natty) with two QScintilla panes. I have a SLOT that adds annotations to certain lines, which I want to be styled. I've created the GUI in Designer, and my own code styles both editor panes in the same way, so I would expect there would be no difference between the two. When I add an annotation to each editor for testing, one is styled in the annotation style I have set and the other isn't. Oddly, it's always the right hand pane which is wrong, if I swap them over like this: self.leftEditor, self.rightEditor = self.rightEditor, self.leftEditor then it's still the right hand pane which is incorrect. I made a cut down version of the GUI just to show you what the bug looks like: http://imgur.com/dcRbi In the image, both annotations should look like the left hand one, with a yellow background and smaller, italicized text. The code which generates this I've put here: https://gist.github.com/944268 there's still quite a bit of irrelevant code there, as I can't really be sure what's causing the bug. Is it me or is this a problem with QScintilla? Thanks (yet again), Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Newbie resizing dock widgets question
On Tue, Apr 26, 2011 at 21:45, David Boddie da...@boddie.org.uk wrote: On Mon Apr 25 21:50:43 BST 2011, Sarah Mount wrote: In designer-qt4 the object inspector, widget box and so on seem to be QDockWidgets. I'm making a GUI in Designer that I want to be similarly structured. In designer the edge of each QDockWidget can be grabbed with the mouse and resized, but in my GUI this isn't possible. I *think* I've set all of the dockWidget properties and the widgets can be closed and floated, but not resized. Have I misunderstood this? Is there some sort of splitter object that needs to be placed between the dockWidgets? Or some property set in the layout managers? Which version of Qt Designer are you using? Did you manually place the dock widget into a layout? This is Designer 4.7.2 on Ubuntu Natty and the docks are going inside a Main Window widget, with a grid layout applied to them. In older versions of Qt Designer, dropping a dock widget onto a main window form simply left it floating, unmanaged, unless the central area was managed by a layout. In newer versions, the dock window is automatically docked by default - at least, it seems that way. If you have a dock window embedded in a main window, and you can't move it when you preview the form, try breaking the layout of the window, selecting the dock widget, and setting its docked property to true. It should appear in one of the dock areas around the sides of the window and be handled separately to the widgets in the main window itself. This seems to be the problem, and like you say, if I break the layout and set the widgets to docked they become resizable, oddly. However, I have three QDockWidgets, one that is intended to stretch over the bottom of the main window, and the other two above it side by side, like this: [][] [ ] I've set all of the sizePolicy properties to Expanding; the lower dockWidget expands correctly both horizontally and vertically. The top two widgets will expand vertically but leave a large gap in the centre of the main window when resizing the main window horizontally. This worked just fine when I was applying a grid layout to the centralWidget. Any ideas? It all seems a bit counter-intuitive to me! Many thanks again, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Newbie resizing dock widgets question
On Wed, Apr 27, 2011 at 00:10, Andreas Pakulat ap...@gmx.de wrote: On 26.04.11 23:45:58, Sarah Mount wrote: However, I have three QDockWidgets, one that is intended to stretch over the bottom of the main window, and the other two above it side by side, like this: [][] [ ] I've set all of the sizePolicy properties to Expanding; the lower dockWidget expands correctly both horizontally and vertically. The top two widgets will expand vertically but leave a large gap in the centre of the main window when resizing the main window horizontally. This worked just fine when I was applying a grid layout to the centralWidget. Any ideas? It all seems a bit counter-intuitive to me! Sounds like you're using the wrong tool for the job. dock widgets are supposed to be moveable around the 4 areas above, below and next to the central area. The intent is to have a central widget or widgets and the dock-areas contain helper tools for working on the central widget. If all you want is one widget stretched alongside the bottom and two above that share the space, then use normal widgets and a grid-layout for that. The two top widgets are QScintilla widgets, I wanted them to be resizable and closable so you can choose to only edit one pane at a time. As I understand it, QDockWidgets are the only widgets that have those properties, or am I wrong? Thanks, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Newbie resizing dock widgets question
On Wed, Apr 27, 2011 at 00:17, David Boddie da...@boddie.org.uk wrote: On Wednesday 27 April 2011, Sarah Mount wrote: On Tue, Apr 26, 2011 at 21:45, David Boddie da...@boddie.org.uk wrote: snip: long docking discussion The center widget or central area in the main window is a normal widget that you can place any other widgets in. This includes dock widgets, but they aren't designed to be used like that. They are supposed to be managed separately by the main window, outside the central area. Qt Designer does a reasonable job of letting you configure this, but it is constrained by its widgets-on-a-form approach to UI design. If it turns out that you aren't using all the features of dock widgets in your application, you can design the kind of UI you describe using splitters instead. If you want to do that, just ask and I can give more details. Thanks, that diagram made a lot of sense, I've re-worked the GUI with splitters, and, like you say, that's much more what I was looking for. I didn't realise that splitters could be resized, and I can add some actions for closing each pane. Many thanks, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Newbie resizing dock widgets question
In designer-qt4 the object inspector, widget box and so on seem to be QDockWidgets. I'm making a GUI in Designer that I want to be similarly structured. In designer the edge of each QDockWidget can be grabbed with the mouse and resized, but in my GUI this isn't possible. I *think* I've set all of the dockWidget properties and the widgets can be closed and floated, but not resized. Have I misunderstood this? Is there some sort of splitter object that needs to be placed between the dockWidgets? Or some property set in the layout managers? Thanks for your help, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] Using layouts in a tab widget
Sorry if this is an obvious question, but I couldn't find an answer to it on the using-containers page or on StackOverflow. I have a bunch of tab widgets that need to have appropriate layouts applied to them and to the tabs they contain. Working with the .ui files in Qt4 Designer, I notice that if I click on an individual tab inside the tab widget, then it is by default marked as break layout, like every other widget. If I then try to apply a layout to the tab, the layout instead gets applied to the whole tab widget. So, to get around this I could put a GroupBox or Frame inside each tab and give that a layout, but this seems long-winded. Is there something obvious I have missed or does Qt assume that each tab will have a container widget placed inside it? Many thanks, Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Using layouts in a tab widget
On Sun, Apr 24, 2011 at 07:53, Vincent Vande Vyvre vincent.vandevy...@swing.be wrote: Le 24/04/11 08:10, Sarah Mount a écrit : Sorry if this is an obvious question, but I couldn't find an answer to it on the using-containers page or on StackOverflow. I have a bunch of tab widgets that need to have appropriate layouts applied to them and to the tabs they contain. Working with the .ui files in Qt4 Designer, I notice that if I click on an individual tab inside the tab widget, then it is by default marked as break layout, like every other widget. If I then try to apply a layout to the tab, the layout instead gets applied to the whole tab widget. So, to get around this I could put a GroupBox or Frame inside each tab and give that a layout, but this seems long-winded. Is there something obvious I have missed or does Qt assume that each tab will have a container widget placed inside it? No, you don't need groupBox or frame for that. Place your widgets in first tab, choose an appropriate layout for these widgets, whith this layout selected, select the whole tabWidget and apply a vertical layout. Do the same for each tab. Now, select a tab in objects inspector and scroll the properties editor and you'll see the properties for each layout. Ah... so you select *all* the objects and Designer inserts a Layout object for you. Thanks, I had no idea that was possible! Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Styling an QMdiArea widget
On Mon, Apr 18, 2011 at 01:14, David Boddie da...@boddie.org.uk wrote: On Sun Apr 17 19:48:16 BST 2011, Sarah Mount wrote: Thanks, you and David were both right, the error was an incorrect path for the JPG. However, what I was after was to have one image appear in the background, and not to have the image tiled. This is possible using a style sheet, but I'm not sure a) if it's possible using a brush (your code comes out with the image tiled) or b) whether it's possible to use a style sheet, as my code for that didn't work! I think the answers are: a) You can't really use a brush for this because it only supports tiled textures. b) QMdiArea doesn't support style sheets: http://doc.qt.nokia.com/4.7/stylesheet-reference.html However, I looked at qtconfig, one of the tools shipped with Qt, and it seems that there's a trick you can use if you are able to create a QMdiArea subclass and use that instead of a regular QMdiArea widget: http://www.diotavelli.net/PyQtWiki/Adding_a_background_image_to_an_MDI_area Thanks, that looks like just the thing! Sarah -- Sarah Mount, Senior Lecturer, University of Wolverhampton website: http://www.snim2.org/ twitter: @snim2 ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] Styling an QMdiArea widget
On Sun, Apr 17, 2011 at 15:28, Vincent Vande Vyvre
vincent.vandevy...@swing.be wrote:
Le 17/04/11 15:17, Sarah Mount a écrit :
Hi everyone,
I have a main application window that I want to style with a style
sheet like this:
#mywidget {
background : white;
background-image : url(:/images/images/EfDChancoComposite.jpg);
background-repeat : no-repeat;
}
When the project is created, the widget that I want to apply the CSS
to becomes an MDI area, so presumably the styling now needs to apply
to the MDI area, not the original widget, like this:
class MyMainWindow(QtGui.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self)
self.setupUi(self)
self.mdi = QtGui.QMdiArea()
self.mdi.setStyleSheet(QMdiArea { background : white;
background-image : url(:/images/images/EfDChancoComposite.jpg);
background-repeat : no-repeat; })
self.setCentralWidget(self.mdi)
...but that doesn't work! Is this because QMdiArea widgets can't be
styled with CSS, and if so, is it possible to use a QBrush to do this
(including the no-repeat directive)? Or, have I just misunderstood the
API?
Many thanks,
Sarah
Hi,
You can use setBackground()
self.brush = QtGui.QBrush(QtGui.QPixmap(view.jpg))
self.mdi.setBackground(self.brush)
but reimplement sizeEvent() for rescale the pixmap
Thanks, tried that code and the image doesn't appear :( There's no
traceback so it's difficult to figure out why...
Sarah
--
Sarah Mount, Senior Lecturer, University of Wolverhampton
website: http://www.snim2.org/
twitter: @snim2
___
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Re: [PyQt] Styling an QMdiArea widget
On Sun, Apr 17, 2011 at 16:48, Vincent Vande Vyvre
vincent.vandevy...@swing.be wrote:
Le 17/04/11 16:36, Sarah Mount a écrit :
On Sun, Apr 17, 2011 at 15:28, Vincent Vande Vyvre
vincent.vandevy...@swing.be wrote:
Le 17/04/11 15:17, Sarah Mount a écrit :
Hi everyone,
I have a main application window that I want to style with a style
sheet like this:
#mywidget {
background : white;
background-image : url(:/images/images/EfDChancoComposite.jpg);
background-repeat : no-repeat;
}
When the project is created, the widget that I want to apply the CSS
to becomes an MDI area, so presumably the styling now needs to apply
to the MDI area, not the original widget, like this:
class MyMainWindow(QtGui.QMainWindow, Ui_MainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self)
self.setupUi(self)
self.mdi = QtGui.QMdiArea()
self.mdi.setStyleSheet(QMdiArea { background : white;
background-image : url(:/images/images/EfDChancoComposite.jpg);
background-repeat : no-repeat; })
self.setCentralWidget(self.mdi)
...but that doesn't work! Is this because QMdiArea widgets can't be
styled with CSS, and if so, is it possible to use a QBrush to do this
(including the no-repeat directive)? Or, have I just misunderstood the
API?
Many thanks,
Sarah
Hi,
You can use setBackground()
self.brush = QtGui.QBrush(QtGui.QPixmap(view.jpg))
self.mdi.setBackground(self.brush)
but reimplement sizeEvent() for rescale the pixmap
Thanks, tried that code and the image doesn't appear :( There's no
traceback so it's difficult to figure out why...
Sarah
Strange, if I use this code that works:
class MyMainWindow(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self)
self.mdi = QtGui.QMdiArea()
self.setCentralWidget(self.mdi)
pix = QtGui.QPixmap(img.jpg)
self.brush = QtGui.QBrush(pix)
self.mdi.setBackground(self.brush)
Thanks, you and David were both right, the error was an incorrect path
for the JPG. However, what I was after was to have one image appear in
the background, and not to have the image tiled. This is possible
using a style sheet, but I'm not sure a) if it's possible using a
brush (your code comes out with the image tiled) or b) whether it's
possible to use a style sheet, as my code for that didn't work!
Any advice greatly appreciated.
Sarah
--
Sarah Mount, Senior Lecturer, University of Wolverhampton
website: http://www.snim2.org/
twitter: @snim2
___
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