This method is tested to work on Visual Studio 2013. Pre-built binaries using Visual Studio 2012 and 2013 are available here, including OpenGL versions. Step 1: The Setup Download and install RapidEE here. RapidEE is a windows environment variables editor. It is extremely useful for the rest of this process (and just in general). Install … Read more
I had the same issue, but finally got this to work. I’m using Qt 5 with the Fusion color theme: QPalette pal = button->palette(); pal.setColor(QPalette::Button, QColor(Qt::blue)); button->setAutoFillBackground(true); button->setPalette(pal); button->update(); Try these commands in the exact order as above, and if that still doesn’t work, set your theme to Fusion and try again. Good luck!
Building You can use Qt in Visual Studio 2015 without any problems. As already stated in the comments, you have to build it from source but Qt is pretty straightforward to build. You can download the current (5.5) sources here and then follow this step by step example on building it. I would also suggest … Read more
Qt 5.2 Assuming that the environment was prepared for XP targeting, and relevant XP-targeting qt5xp.patch and the bug fix qt5fixes.patch available – both from my other answer, we have to do the following: Create a separate win32-msvc2012-static and win32-msvc2012-static-xp qmake specs by copying them from qtbase/mkspecs/win32-msvc2012 and qtbase/mkspecs/win32-msvc2012-xp, respectively. Modify the qmake specs. Teach configure … Read more
You declared MyProjectLib as a shared library, so unless you exported all or part of the symbols of the library, you will only have a .dll designed to be loaded at runtime, and no .lib to link against at compile time as you’re trying to do. A quick solution may be to declare MyProjectLib as … Read more
Here are the full instructions: Get it: git clone https://github.com/mxe/mxe.git Install build dependencies Build Qt 5 for Windows: cd mxe && make qtbase This will first build its dependencies and the cross-build tools; It should take less than an hour on a fast machine with decent internet access. Due to the new modular nature of … Read more
Qt Quick 2 uses a scene graph for efficient rendering on the GPU. Unfortunately this makes it impossible to embed classic widgets into the scene. The old approach to embed such widgets with the help of QGraphicsProxyWidget works only with Qt Quick 1, because internally it uses a QGraphicsView for all the heavy lifting and … Read more
For dynamic build only: Make sure you move the qwindows.dll to the following directory: yourapp.exe Qt5Core.dll … platforms/qwindows.dll … Note that the plugins directory is missing! You put all the needed folders from QT_BASE/…/plugins/* directly together with your binaries. BTW: I did not need libEGL.dll, but my application almost has no GUI. My source: http://qt-project.org/forums/viewthread/27056/#122588
The problem here is that there are two signals with that name: QSpinBox::valueChanged(int) and QSpinBox::valueChanged(QString). From Qt 5.7, there are helper functions provided to select the desired overload, so you can write connect(spinbox, qOverload<int>(&QSpinBox::valueChanged), slider, &QSlider::setValue); For Qt 5.6 and earlier, you need to tell Qt which one you want to pick, by casting it … Read more