General and Desktop

I see...thanks for the info!..

I clear the QGraphicsScene by calling myscene.clear(); When I didn't do this, the program would balloon in memory and quickly crash. I'll try what you suggested. Thanks.

Please use @ tags as Andre recommended you in another post. BTW, why do use Q3* classes? Maybe you can avoid them and use ones that are not obsolete?

Perhaps use a custom delegate?

I apply this method to the code, but still I have a problem. When I press over an empty graphicsView a get the coordinates correctly. But when I load a png image in the graphics view, when I press on the image, the coordinates don't change and remain the same.Do you have something to suggest about this problem? Thanks

I'd say: bug. File a report, with a simple testcase please.

Read the file completely into memory, change the content and then write again. Or create a temporary second file, read the original, change the text and write to the second one.

Thanks a lot, it works now :)

I'm using Qt opensource sdk 4.7.0. I tried the example on both Ubuntu 10.10 and Meego. With your given code, the ToolTip also displayed in rectangle on Ubuntu 10.10. Thanks.

depends on your application. if it is a game, i will do the same, but if it is a 3d application, i.e. a 2d modeler, you probably want to update the scene when your scene has changed. for example when window is resized or mouse dragged.

Your welcome. I am glad that you solved the problem finally!

Okay, it was the max which dumped something else, thx!

When there are several buttons in a strip of gradient buttons on OS X, they have a single-line frame between them. Because of that, they look like segments of a single control. To make this kind of buttons, I used QToolButton (not a QToolBar, just buttons in layouts), and styled them. I used 4 styles: the first (left) button in a strip. buttons in the middle in a strip. the last (right) button in a strip. a standalone button. These 4 styles draw different frames. This is what I did: A fragment of the style that I assign to the instance of QApplication (these styles use stretchable images that you need to draw or grab from OS X) @// // == QToolButton: segmented // "QToolButton[sgm_single="true"] { " " border-width: 4px; " " border-image: url(:/img/BPicTbrSUp.png) 4 4 4 4 ; " "} " "QToolButton[sgm_single="true"]:pressed { " " border-width: 4px; " " border-image: url(:/img/BPicTbrSDown.png) 4 4 4 4 ; " "} " "QToolButton[sgm_left="true"] { " " border-width: 4px; " " border-image: url(:/img/BPicTbrLUp.png) 4 4 4 4 ; " "} " "QToolButton[sgm_left="true"]:pressed { " " border-width: 4px; " " border-image: url(:/img/BPicTbrLDown.png) 4 4 4 4 ; " "} " "QToolButton[sgm_left="true"]:checked { " " border-width: 4px; " " border-image: url(:/img/BPicTbrLChecked.png) 4 4 4 4 ; " " color: white; " "} " "QToolButton[sgm_middle="true"] { " " border-width: 4px; " " border-image: url(:/img/BPicTbrMUp.png) 4 4 4 4 ; " "} " "QToolButton[sgm_middle="true"]:pressed { " " border-width: 4px; " " border-image: url(:/img/BPicTbrMDown.png) 4 4 4 4 ; " "} " "QToolButton[sgm_middle="true"]:checked { " " border-width: 4px; " " border-image: url(:/img/BPicTbrMChecked.png) 4 4 4 4 ; " " color: white; " "} " "QToolButton[sgm_right="true"] { " " border-width: 4px; " " border-image: url(:/img/BPicTbrRUp.png) 4 4 4 4 ; " "} " "QToolButton[sgm_right="true"]:pressed { " " border-width: 4px; " " border-image: url(:/img/BPicTbrRDown.png) 4 4 4 4 ; " "} " "QToolButton[sgm_right="true"]:checked { " " border-width: 4px; " " border-image: url(:/img/BPicTbrRChecked.png) 4 4 4 4 ; " " color: white; " "} " @ In a constructor of a dialog with these special buttons @ // a single button ui->btnWkPerfInfo->setProperty("sgm_single", true); // // 3 buttons in a strip ui->btnDayAdd->setProperty("sgm_left", true); ui->btnDayCopy->setProperty("sgm_middle", true); ui->btnDayDelete->setProperty("sgm_right", true); @

When I mahe this change the .exe file stops working when I prees over the image, when I have already opened it. Is there any good example to get coordinates of an image using QGraphicsView? ////// .h ////////// @class graphicsView : public QGraphicsScene { public: graphicsView( QObject *parent = 0); protected: void mouseMoveEvent ( QMouseEvent * event ); };@ ///////// .cpp /////////// @graphicsView::graphicsView( QObject *parent ) : QGraphicsScene( parent ) { } void QGraphicsView::mouseMoveEvent ( QMouseEvent * event ) { QPointF pos = event->pos(); double x = pos.x(); double y = pos.y(); int k=3; QLabel *label_value_x; QLabel *label_value_y; label_value_x->setNum(x); label_value_y->setNum(y); }@

The fact that an enum is used in a switch case should not cause any problems per say. Can you post a stand alone, small example that shows the problem? That way, we can reproduce the problem and investigate what the cause can be.

"Let me google that for you":http://lmgtfy.com/?q=opengl+reflection

Geroif and Franzk I appreciate your concern, I really do. Geroif: The good thing is after applying the rectification you have pointed out for argument passing, my program compiled without any error :) but the bad think is its still working in blocking mode destroying my very purpose of exciting that function on separate thread. I followed the documentation and your absolutely right about using QThread. But the thing is iam not that much vigilant to grasp it by myself since the QThread class is to be built in header file (as far as ive observed) this will require my Function implementation inside void Run() to have global variables so that i can pass result through to my main program. Can you plz guide me in the right direction! Regards.

With a bit of template magic, you can make a RAII class that you can use for more than one purpose. Still, even without that, it can make perfect sense to create a RAII class that you only use at a single place. It is not like they take a lot of code to write, just a few lines usually does it. If you end up with code like Eonz showed before: @ void otherProc() { mutex.lock(); if (condition1Passes) { if (condition2Passes) { if (condition3Passes) doStuffSafely(); else mutex.unlock(); } else mutex.unlock(); } else mutex.unlock(); } @ you know you need a RAII class to make this readable and maintainable again. There is one ready made for mutexes, but they also make perfect sense for many other cases too.

My final solution was to use stylesheet attribute "border-image:none;"

Ah sorry! it was a problem in my OpenGL code!!! I just noticed it! I'll keep the code for future reference :-) Thanks for even reading this :-)