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• How to use of animation in Qt for stacked widgets?

  - by rohit k.

  i am using stacked widget and i want to have the following effect : when i press a pushbutton , the button should move to the center and gradually fade out at the same time. while the button is fading the next page of the stacked widget should gradually fade in or any kind of animation would do. tried many thing but i got unsatisfactory results.…

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• How to make QCombobox painting item delegate for it's current Item? (Qt 4)

  - by r4nj33t

  QCombobox set Item delegate not painting for current Item.. I am trying to create a combo box showing different line types (Solid, Dotted, Dash etc). Currently i am setting item delegate for its content so as to draw/paint line type instead of displaying names. All line types are drawing currectly but as soon as i am selecting any line type…

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• How to create widget with clickable text in QT/PyQt?

  - by serge

  Hi everyone, i'm trying to realize non-editable QTableView with widgets in cells that should contain clickable listed text. With following code i'm setting widget in definite cell: view = QTableView() label = QLabel( <some html text> ) ... view.setIndexWidget(index, label) I used html to make label's text clickable, but links…

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• How to get this Qt state machine to work?

  - by Ton van den Heuvel

  I have two widgets that can be checked, and a numeric entry field that should contain a value greater than zero. Whenever both widgets have been checked, and the numeric entry field contains a value greater than zero, a button should be enabled. I am struggling with defining a proper state machine for this situation. So far I have the…

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• Mac OS X linker error in Qt; CoreGraphics & CGWindowListCreate

  - by Jake Petroules

  Here is my .mm file #include "windowmanagerutils.h" #ifdef Q_OS_MAC #import </System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGWindow.h> QRect WindowManagerUtils::getWindowRect(WId windowId) { CFArrayRef windows = CGWindowListCreate(kCGWindowListOptionOnScreenOnly,…

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• How do I use QXmlQuery properly? (Qt XQuery/XPath)

  - by Steven Jackson

  I'm using the following code to load in an XML file (actually an NZB): QXmlQuery query; query.bindVariable("path", QVariant(path)); query.setQuery("doc($path)/nzb/file/segments/segment/string()"); if(!query.isValid()) throw QString("Invalid query."); QStringList segments; if(!query.evaluateTo(&segments)) throw…

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• how to call gstreamer as an external process in Qt to play incoming audio streams?

  - by Rajesh

  im now using mplayer to play incoming audio streams from network. i need to use gstreamer to play that. my code to play the audio using mplayer is like this: arg<<"http://192.168.0.2/img/video.asf"<<"-novideo"; program="mplayer"; process=new QProcess(this); process-start(program,arg);## Heading ##

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• How can I find a Qt metaobject instance from a class name?

  - by axilmar

  Is there a way to find the QMetaObject instance of a class, given the class name? what I like to do is to load objects from disk, but for this to happen, I need a way to retrieve a QMetaObject instance using the name of a class, in order to use the QMetaObject to create an instance.

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• What is the easiest way to reference libraries in Qt projects?

  - by Jake Petroules

  I have two Qt4 Gui Application projects and one shared library project, all referenced under a .pro file with the "subdirs" template. So, it's like: exampleapp.pro app1.pro app2.pro sharedlib.pro Now, what I want to do is reference sharedlib from app1 and app2 so that every time I run app1.exe, I don't have to manually…

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• Qt : what is the difference between layout and widget?

  - by Lukasz Lew

  I thought that layout is just a widget that keeps more widgets inside. But now I find that I can't add it to other widgets using addWidget. For instance how to add a layout to QSplitter?

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• Qt - How to use rich text in a QComboBox?

  - by Aaron McKellar

  I am trying to use rich text in a QComboBox but it does not support it. Perhaps I should write a subclass? But I am unsure on what I would need to override as I have never done anything like this before. Please help. Thanks!

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• Qt - How to Place a QTextEdit in a QVBoxLayout with left and right margins?

  - by Narek

  How to Place a QTextEdit in a QVBoxLayout with left and right margins? I could use, of course, a QHBoxLayout, place the QTextEdit into that horizontal layout in between to spacings (addSpacing(40)) and only then the horizontal layout could add into the vertical layout, but want to know if there is a direct way of doing that.

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• How to replace a Widget with another using Qt ?

  - by Natim

  Hi, I have an QHBoxLayout with a QTreeWidget on the left, a separator on the middle and a widget on the right. When I click on the QTreeWidget, I want to change the widget on the right to modify the QTreeWidgetItem I tried to do this with this code : def new_rendez_vous(self): …

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• How to decode "application/x-qabstractitemmodeldatalist" in Qt for drag and drop?

  - by gct

  I've created a child class of QTreeWidget that I want to be able to drag items from another tree widget too (I want to handle the insertion myself though), as well as from a QListWidget. I've overridden the dropEvent method in my class, and it looks like the mimetype of the data I'm…

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• How to set input focus to a shown dialog in Qt?

  - by Jake Petroules

  In a button click slot, I create and exec() a dialog with a NULL parent. Inside the dialog's constructor, I have: this->activateWindow(); this->raise(); this->setFocus(); The dialog is application modal and has strong focus. However, it does NOT respond to keyboard events…

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• For Qt 4.6.x, how to auto-size text to fit in a specified width?

  - by darenchow

  Inside of my QGraphicsRectItem::paint(), I am trying to draw the name of the item within its rect(). However, for each of the different items, they can be of variable width and similarly names can be of variable length. Currently I am starting with a maximum font size, checking if…

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• Qt: Dragging a widget to scroll the widget's parent QScrollArea?

  - by samsonite

  I've got a long horizontal QLabel displaying a png (the image shows a signal/time graph). Under that, I've got a QTableWidget. Both of these are in a QScrollArea because I want them to stay vertically aligned (the cells in the table correspond with the signal seen directly above…

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• What is the best practice for communicating with another thread in Qt?

  - by George Edison

  I have a QThread derived class that communicates with the main thread by sending QEvents to it. What is the best way for the main thread to communicate with the second thread? The main thread has a pointer to the second one.

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• Is there an easy way to strip HTML from a QString in Qt?

  - by George Edison

  I have a QString with some HTML in it... is there an easy way to strip the HTML from it? I basically want just the actual text content. <i>Test:</i><img src="blah.png" /><br> A test case Would become: Test: A test case

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• How to automate detection of out of order tab navigation in Qt dialogs?

  - by WilliamKF

  Typically, a dialog wishes to have tab navigation proceed in an orderly fashion through a dialog that roughly corresponds to the order of reading a book. When new fields are added to a dialog by engineers on a team, the new widgets can often not be inserted in tab correct…

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• Qt -how to know whether content in child widgets has been changed?

  - by Narek

  In QMainWindow I have 2 QSplitters. In that splitters I have QTextEdit, QLineEdits, QTableWinget, Ragio buttons and so on... I want to know if somthing has been chaged after pressing File-New menu button. Is there any general method for doing this? Somwhere I have read…

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• Want to store profiles in Qt, use SQLite or something else?

  - by Pirate for Profit

  I want to store some settings for different profiles of what a "task" does. I know in .NET there's a nice ORM is there something like that or an Active Record or whatever? I know writing a bunch of SQL will be fun

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• How to pass variables to slot methods in QT?

  - by Neko

  Hi. I'm making a little chat messenger program, which needs a list of chat channels the user has joined. To represent this list graphically, I have made a list of QPushButtons, which all represent a different channel. These buttons are made with the following method,…

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• How to save a file that contains 2 QMap datas in Qt?

  - by Hanny

  I have 2 datas which type is QMap: 1.QMap novel; QString tempChapter; QString tempStory; 2.QMap combo; int tempInd; QString tempChap; my question is: How can I save these 2 Datas into a single file?? And if it's successfully saved, how can I load…

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• How do I define an Icon in QT with a compile time predefined image?

  - by Regof

  How do I define such an icon?

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