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  • Quartz 2D's drawing text and NSTimer in custom method

    - by coure06
    i want to show text using quartz 2d. Text will be drawing randomly on different position after each 1 seconds. I am not sure how i can use NSTimer with quartz 2D text. I can draw text in drawRect method where graphics context is already available. How i will draw text using my custom method myDraw which will be called after 1 second using NSTimer? If i create my custom Method the graphics context is not available in that method.

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  • Creating a custom ribbon button in VS 2008 Standard

    - by Kevin L.
    I want to create a custom ribbon button within Outlook 2007 using Visual Studio 2008 Standard, but am unsure how to proceed. Most of the resources I've found mention VS 2008 Pro, and this SO answer mentions that VSTO is not even included in Standard. Is creating custom ribbon buttons possible using Visual Studio 2008 Standard? If so, where should I start?

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  • Qmake project dependencies (linked libraries)

    - by Stick it to THE MAN
    I have a project that links to a number of shared libraries. Lets say project A depends on projects B and C Ideally, I want to impose the following dependencies in my project file: Rebuild project A if either B or C has been rebuilt since last time project A was built Use the output for the relevant configuration (i.e. if building project A in debug mode, then use the debug versions of the libs for project B and C) Does anyone know how I may explicitly express such dependencies in my project file?

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  • django custom management command does not show up in production

    - by Tom Tom
    I wrote a custom management command for django. Locally with my dev settings everything works fine. Now I deployed my project onto the production server and the management command does not show up, respectively is not available. But I did not get an error message deploying the project (syncdb). Any ideas where I could try to begin to search? Is there a special command that all custom management commands are "autodiscovered"?

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  • Cannot import PyQt4.QtGui

    - by Rock Hymas
    I have a working Python 2.6 install and just installed the PyQt4 built for Python 2.6 (available at http://www.riverbankcomputing.co.uk/software/pyqt/download). When I try to import PyQt4.QtGui I get the following error: ImportError: DLL load failed: The specified procedure could not be found. I'm on Windows 2k8 64-bit, but my Python install is 32-bit.

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  • Programming user interface advice?

    - by onurozcelik
    Hi, In my project I going to generate a user interface through programming. Scalability of this UI is very important requirement. So far I am using two dimensional graphics for generating the UI. I think there may be different solutions but for the moment I know only two. First one is supplying X,Y coordinates of each two dimensional graphic on my UI.(I do not prefer this solution because I do not want to calculate X,Y coordinates of each graphic. For the moment I don't have a logic for doing this easily) Second one(which is currently I am using now) is using layouts which organizes its contents according to size of item. In this solution I don't have to calculate X,Y coordinates of each item.(Layout is doing this for me) But this approach may have its own pitfalls. I am very new to user interface programming. Can you give me advice about this issue?

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  • Cannot run an executable binary file on another Linux System??

    - by Claire Huang
    I'm using Ubuntu 10.04 and Qt4.6, and I've created an executable binary file on my own computer through QtCreator. Now I want to put my executable file on CentOS 5, but it seems that this executable file cannot run on CentOS. Do I need to set some compile parameters to make it runnable on Linux other than Ubuntu?? Or do I need to put some lib files with the executable binary file? (For windows, the .exe file should put together with some .dll files to provide the correct dynamic lib linkage, is there some similar problem on linux?) Thanks for your help!

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  • Small, Custom WYSIWYG editor

    - by Click Upvote
    I would make to make a small WYSIWYG editor similar to the one used by StackOverflow. Basically, it would have buttons like [quote], and when that button is clicked, [quote] [/quote] should be inserted in the textarea where the cursor is or at the end of all other text. If the [quote][/quote] could be highlighted in some way that would be even more excellent, but its not required. Is there any WYSIWYG editor already available where you can add custom buttons, with custom text being added to the textbox as a result?

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  • Capture Flash Audio in 4.7 Edge?

    - by emcmanus
    Is there a way to capture plugin (Flash) audio before it gets to the sound card? I'd like to record plugin audio, hopefully without actually playing the sound. Capturing audio at the device level is an absolute last resort, as the application would pick up all system audio rather than just the Webkit plugin. I'm aware of the recent switch back from QTMultimedia; is this possible with phonon? I spent the night looking for some way to access the phonon graph via QWebFrame (or any of the QtWebkit widgets) -- and didn't turn up much. I also started digging through QTWebkit, particularly NPAPI, without success. For reference, I'm using the edge version of 4.7 (6aa50af000f85cc4497749fcf0860c8ed244a60e) This seems to be a fairly challenging problem. Any hints would be greatly appreciated.

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  • Penalty of using QGraphicsObject vs QGraphicsItem?

    - by Dutch
    I currently have a hierarchy of items based off of QGraphicsItem. I want to move to QGraphicsObject instead so that I can put properties on my items. I will not be making use of signals/slots or any other features of QObject. I'm told that you shouldn't derive from QObject because it's "heavy" and "slow". To test the impact, I derive from QGraphicsObject, add a couple properties to my items, and look at the memory usage of the running app. I create 1000 items using both flavors and I don't notice anything more than 10k more memory usage. Since all I am adding on to my items are properties, is it safe to say that QObject only adds weight if you are using signals/slots?

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  • Custom pin animation - MKMapView

    - by user128647
    I have used pin images in application instead of standard pin, now i want to give animation (dropping effect as it was with standard pins) to custom pins. How can i provide dropping animation effect to custom pin images????

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  • QPainter declared inside a run function creates artifact.

    - by yan bellavance
    I am rendering a QPixmap inside of a QThread. the code to paint is inside a function. If I declare the painter inside the drawChart function everything seems ok but if I declare the painter inside the run function the image is wrong in the sense that at the edge of a black and white area, the pixels at the interface are overlapped to give a grey. Does anyone know why this is so? Could it be because of the nature of the run function itself? //This is ok void RenderThread::run() { QImage image(resultSize, QImage::Format_RGB32); drawChart(&image); emit renderedImage(image, scaleFactor); } drawChart(&image){ QPainter painter(image); painter.doStuff()(; ... } //This gives a image that seems to have artifacts void RenderThread::run() { QImage image(resultSize, QImage::Format_RGB32); QPainter painter(image); drawChart(painter); emit renderedImage(image, scaleFactor); } drawChart(&painter){ painter.doStuff()(; ... }

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  • Integrating Jython Cpython

    - by eric.frederich
    I am about to begin a project where I will likely use PyQt or Pyside. I will need to interface with a buggy 3rd party piece of server software that provides C++ and Java APIs. The Java APIs are a lot easier to use because you get Exceptions where with the C++ libraries you get segfaults. Also, the Python bindings to the Java APIs are automatic with Jython whereas the Python bindings for the C++ APIs don't exist. So, how would a CPython PyQt client application be able to communicate with these Java APIs? How would you go about it? Would you have another separate Java process on the client that serializes / pickles objects and communicates with the PyQt process over a socket? I don't want to re-invent the wheel... is there some sort of standard interface for these types of things? Some technology I should look into? RPC, Corba, etc? Thanks, ~Eric

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  • Changing the color of a QTextBlock that is within a QTextDocument

    - by yan bellavance
    Is there any other way to change the QTextLayout of a QTextBlock that is within a QTextDocument without having to subclass QAbstractTextDocumentLayout and call its documentChanged? I know that on a call to QTextBlock::layout() const ; the returned QTextLayout object can only be modified from the documentChanged implementation of a QAbstractTextDocumentLayout subclass but I was wodering if there was any other way before I implemented it.

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  • getting keyboard events with pyqt

    - by Moayyad Yaghi
    hello i converted recently from wxpython to pyqt and im still facing alot of problems since im still noob in pyqt so is it possible to detected if user pressed (CTRL+key ) in pyqt ? and how ? i've been trying to find an answer for this for 3 days . if you know website or a good place to learn pyqt, it will be highly appreciated thanx in advance

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  • Strange problem with vectors.

    - by Catalin Dumitru
    I have a really strange problem with stl vectors in which the wrong destructor is called for the right object when I call the erase method if that makes any sense. My code looks something like this: for(vector<Category>::iterator iter = this->children.begin(); iter != this->children.end(); iter++) { if((*iter).item == item) { this->children.erase(iter); return; } ------------------------- } It's just a simple function that finds the element in the vector which has some item to be searched, and removes said element from the vector. My problem is than when the erase function is called, and thus the object which the iterator is pointing at is being destroyed, the wrong destructor is being called. More specific the destructor of the last element in the vector is being called, and not of the actual object being removed. Thus the memory is being removed from the wrong object, which will still be an element in the vector, and the actual object which is removed from the vector, still has all of it's memory intact. The costructor of the object looks like this: Category::Category(const Category &from) { this->name = from.name; for(vector<Category>::const_iterator iter = from.children.begin(); iter != from.children.end(); iter++) this->children.push_back((*iter)); this->item = new QTreeWidgetItem; } And the destructor Category::~Category() { this->children.clear(); if(this->item != NULL) { QTreeWidgetItem* parent = this->item->parent(); if(parent != NULL) parent->removeChild(this->item); delete this->item; } }

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  • Encrypt/Decrypt SQLite-database and use it "on the fly"

    - by Berschi
    Here's the thing: In my Qt4.6-Project, I use a SQLite-Database. This database shouldn't be unencrypted on my harddrive. So I want, that on every start of my program, the user gets asked to enter a password to decrypt the database. Of course the database never should appear "in clear" (not encrypted) on my harddrive. So is there any possibility to decrypt a SQLite-database "on the fly" and read and write data? What algorithm is here the best (maybe AES)? When it's not possible (or very slow), maybe it's better to encrypt every string in the database and decrypt the string when the password was right (so that a user could open the database, but has no clue what all the entrys could mean)?

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  • Qwt setAxisScale() locks up application when given numbers less than 2e-07 and greater than 0

    - by Dane Larsen
    I'm using Qwt for some scientific graphing, and I'm working with some fairly small numbers, the smallest being around 1.0e-22. I'm trying to call setAxisScale(xaxis, xmin, xmax) //xmin = 0, xmax = 2.0e-10 But when I do, the application locks up. I haven't found anything in the documentation that refers to a minimum value. Xmin and xmax are both doubles, so that shouldn't be a problem. Is this a bug in Qwt, or am I doing something wrong? Thanks in advance

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  • How to fetch output when calling R using Qprocess or system

    - by SYK
    Hi Experts, I would like to execute a R script simply as R --file=x.R It runs well on the command line. However when I try the system call in C++ by QProcess::execute("R --file=x.R"); or system("R --file=x.R"); the program R runs and quits but I can't see the output the program is supposed to generate. If a program uses no stdout (such as R), how do I fetch the output after a system call either as a output file or in the program's own console? Thanks for your time.

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  • Android: How to resize a custom view programmatically?

    - by herbertD
    Hi all! I am coding a custom view, extended from RelativeLayout, and I want to resize it programmatically, How can I do? the custom view Class is something like: public ActiveSlideView(Context context, AttributeSet attr){ super(context, attr); LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); if(inflater != null){ inflater.inflate(R.layout.active_slide, this); }

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