Solved Qt Designer doesn't work
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I try just to start Qt Designer on Windows 7 x64 + Visual Studio 2015. Designer.exe process appears in task manager, however, no GUI is visible; when I open .ui file in Visual Studio with Qt add-in, Visual Studio hangs. I tried Qt 5.6 and Qt 5.7.
Are there any way to use Qt designer with Visual Studio 2015 x64? -
I once had the same problem with VS2013, it was due to some leftovers from a previous Qt installation. try deleting everything Qt related and reinstall, it worked for me
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It is clean installation.
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I have the exact same configuration, Qt-Addin from https://visualstudiogallery.msdn.microsoft.com/c89ff880-8509-47a4-a262-e4fa07168408
Does the Designer start when you start it out of VS?
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No, it doesn't, for both 5.6 and 5.7. 5.5 and older don't have official 2015 build, so 5.6 and 5.7 are only choise.
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Maybe install Qt to a completely other path, instead of C:\Qt do D:\Qt and be sure about the right configuration about this path in VS => Qt5 => Options. For me it sounds like a rights conflict
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No, it doesn't help. The issue is not about installation path. I changed it, but nothing changed.
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By pure chance I found a hint in the german part of this forum.
There the problem has been solved by setting a environment variable to X:...\Qt\bin(https://forum.qt.io/topic/69278/qt-designer-in-qt-5-7-in-visual-studio-2015-lässt-sich-nicht-öffnen)
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Unfortunatelly, I don't know Gernman; however, as I see from may be not good Google translation, the man in that thread has 2 Qt versions in parallel, and I have only one version; I tried to set PATH variable to Qt bin folder, it changes nothing.
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I found solution. It is Qt bug. Designer can not start unless Qt5WebEngineWidgets.dll is renamed or removed. The question is how to create designs and applications that depend on Qt5WebEngineWidgets.dll? Qt 5.6 and 5.7 are so buggy that it may be good idea to switch to any other GUI framework; I had so many issues with Qt embedded browser sinse WebKit deprecation.
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@Good-Guy can you open a bug on this for Qt Creator at https://bugreports.qt.io/ ?
That would help get it fixed faster, as the Designer developers will probably not find the problem here.