I notice, that some image on webpage has bad quality (sharp corners, no anti-aliasing). I use Qt 4.7.4. This bug not found in Qt 4.8.0 RC1 (I've tested, all OK). How to remove this bug?
Update: examples
http://piccy.info/view3/2305599/c2991408a666393dd49bbcc938ad2f9f/ - Qt 4.7.4
http://piccy.info/view3/2305604/9ac2408088af261edef3b852c4127414/ - Qt 4.8.0 RC1
On webpage images in jpeg. Can I remove this effects?
If it's resolved in Qt 4.8.0 you have two options, upgrade to it either as the RC (which for a production app is risky)/ wait until 4.8 is production ready (soon-ish) or my personal favourite which is pull QtWebKit 2.2 into your development environment. It's not straight forward, but you'll find that it's doable.
Or backport the fix for it, which will be probably more difficult than integrating 2.2 into your build.
Related
I tried running a QT C++ GUI sample in WinPE. It should just open an empty window.
It complains about missing d3d11.dll and dxgi.dll.
QT tries to use OpenGL, if there is no suitable driver, it uses DirectX with ANGLE. I tried removing the DirectX dependency by calling Qapplication::setAttribute(Qt::AA_UseSoftwareOpenGL) before the Qapplication instantiaton. No change, still requires those two dlls.
I tried to copy those two files from my regular Windows, and now the error is: “The procedure entry point CheckIsMSIXPackage could not be located in the dynamic link library dxgi.dll”
I don't need any HW acceleration, how could I make it run?
QT version: 5.14.2 (dynamic linking)
WinPE version: Windows 10 2004
Compiler: Visual Studio 2019 and Mingw 8.1 (I have tried both, same results)
Too late ? Not the solution but only an idea.
Actually I use Winpe WinPe 2009. When i install VirtualBox 6.1.16 in this winpe, i add opengl32.dll and other files. VirtualBox uses QT5 files. And i get the same error. With Depends.exe, i see that opengl32.dll needs this ChechIsMSIXPackage and loock for it in kernelBase.dll. But because kernelBase.dll which comes with winpe2009 doesn't contain this API, i take this kernelBase.dll from a normal W10 (in the ISO/Install.wim). And, in my case, virtualBox works well, QT5 also, opengl32 also.
Qt 5.12 does not depend on dxgi.dll but Qt 5.15 definitely seems to.
One option is to roll back your project to Qt 5.12, I can personally confirm that Qt 5.12 projects work great under Windows PE.
(This is assuming you are using the prebuilt Qt binaries from Maintenance Tool - otherwise there may be a config option to recompile Qt to avoid this).
It's late but since I just ran into this problem myself...
Apparently this dependency is introduced by the Rendering Hardware Interface, and what worked for me for WinPE 1809 was to build Qt 5.15 (.7 and .8) from source - in Msys2, by the way - after removing/commenting out the line include(rhi/rhi.pri) in qtbase/src/gui/gui.pro, and the configure command line includes -no-directwrite -no-opengl -no-icu.
I want to build simple Qt Quick application that access filesystem and do some work with files. But Qt Creator behaves strangely.
I used Qt Designer and added a couple of elements in window
Yellow ! sign says:
But project compiles and runs succesfully. Also i need imports like QtQuick.Dialogs which is imported too, but they do not appear in Designer at all.
I think the reason might be case i described in my answer to own question, but i cannot understand how Maintenance Tool did not install everything.
Maybe i forgot something to check?
I run Ubuntu 16 LTS and use
Qt 5.13.0 and Qt Creator 4.9.2
I think you have a Typo in the version number of your import line.
Be aware that not all QML modules follow the version numbers of Qt. It's not because you installed Qt5.13 that you will need "import QtQuick.Controls 2.13" You can even use lower version numbers to make your code usable for people with older versions of Qt.
I'm currently on Qt 5.12 LTS and can't check if QtQuick.Controls 2.13 exists. But there is an easy way for you to find out yourself:
Go to the import line in the QML file, put the cursor behind the 2. and type CTRL+SPACEBAR
All available versions will show up. Pick one that is available and you should be good to go.
I've downloaded the Qt libraries 4.8.5 and compiled them with MinGW GCC 4.8.2 and now I would like to use Qt Creator to design the interface of my applications in an interactive way. What version of Qt Creator version is recommended for use with Qt libraries version 4.8.5 and where I can get that specific version. Or can I go with the latest version Qt Creator 3.0.1 for Qt libraries 5.2.1? I'm thinking that the latest version of Qt Creator might use features that are not supported by the 4.8.5 version of Qt libraries.
If you're using the Qt Designer tab of Qt Creator to create "forms" (.ui files) then that part of Qt has been stable for quite some time, and was not changed significantly as far as I know in Qt 5.x so you should be fine with the latest version of Qt Creator.
The QML language has undergone significant changes from 4.x to 5.x and there might be issues using the latest Qt Creator's designer tab to visually edit "Qt Quick" (QML files). Certainly the very latest version of Qt Creator features much more extensive QML support, including QML debugging.
If this talk of QML versus UI files is a mystery, then you'll need to read up on the two technologies and make a decision which to use; but essentially if you're set on 4.8.x that probably means using the older UI files. I use these myself and they're fine for traditional desktop applications.
Qt Quick 2 in 5.x is very nice, and enables animated, modern, styled user-interfaces with a powerful scripting language and bindings through to C++, however there is more to master going down that route, and it would mean using Qt 5.x.
I would recommend using Qt 5.2.1. You are certainly wrong here
I would go with Qt 5 but that library is huge and applications that
use it eat allot of memory at runtime
Instead in Qt5 it is more modularised and better and has more classes. If you compile Qt 4.8.5 for static compilation, and same with Qt 5.2 (with opengl enabled and icu & webkit disabled during compilation) the difference in size of binaries created is less than 1MB, the total size of skeleton app is around 6MB.
It is same in case of dynamic linking where the difference in memory consumption of both is almost same (around 15MB) for skeleton app.
I am using QMovie functionality in SystemTrayIcon. ie, rotating the gif files on the top of TrayIcon.
This works fine if I compile the source code on Qt 4.7.0/Windows versions.
But the same code is not working with Qt 4.6.3 build version which deployed on the client machines. It seems some plugins are missing.
I used QMovie::start() and QMovie::stop() slots.
I tried copying the Qt 4.7 DLL (QtCore4.dll) to the Qt 4.6.3 built binaries. But this didn't work.
A lot of things in QMovie changed with the 4.7 release, a lot of bug fixes and a few new popped up.
If you need this feature you'll need to upgrade to 4.7 or newer.
I wish to embed webkit in a windows mobile application. The goal is to allow it to run web apps. I've tried the Qt version, but only webkit is required and not the rest of the functionality Qt has.
You can build WebKit for WinCE out of trunk in the meantime.
See http://trac.webkit.org/wiki/WinCE.
http://www.torchmobile.com/ had a ported webkit browser called IRIS.
Apparently they have recently been swallowed by RIM.
We posted the alpha free download version
www.zetakey.com/download.html
with or without FLASH support available