According to the section "integrate custom widgets with QT designers" in Chapter 5th of C ++ GUI programming with QT 4, second edition, after the components generated by using the plug-in method are compiled using QT creator, the designers in QT creator cannot find them, however, you can find the plug-in by opening
In Ubuntu, how does one install the Qt environment? In Ubuntu, how does one develop Qt Creator? This article will describe these contents.
First install Qt4 and use Qt Creator for development demonstration
In Terminal, enter: sudo apt-get install qt4-dev-tools qt4-doc qt4-qtconfig qt4-demos qt4-designer
◆ The qt4-dev-tools includes
Qt DesignerIt provides programmers with visual design capabilities and can be used to develop all or part of forms in an application. To put it simply, cross-compilation is to generate executable code on one platform. The so-called platform actually contains two concepts: Architecture) and Operating System (Operating System ). The same architecture can run different operating systems. Likewise, the same operating system can run on different architectu
Due to the actual project requirements, Qt needs to be compiled into the LINUX-ARM version, the following is the entire operation process, the program written using Qt has been run on the actual development board, posted here, I hope I can help my friends in need.
Preparations:Linux Kernel version:Linux 2.6.35-22-generic # 33-UbuntuCross-compilation tool:Arm-none-linux-gnueabi 4.4.1Qt installation package:
Respect the author, support the original, if you need to reprint, please attach the original address: http://blog.csdn.net/libaineu2004/article/details/46234079With QT development under Mac OS X, QT libraries and compilers need to be configured. The compiler can only use clang that Apple has developed on its own.1, respectively download and install Xcode and command line Tools (must be installed), after ins
Recently, the GUI interface of the company project uses QT, the study of QT discovery in the last two months is really a problem, there are two main problems in this problem:
"1" Chinese display;
"2" Chinese garbled;
The "1" problem occurs when the situation is: QT interface only the English alphabet, Chinese one is not displayed, and
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Qt source code parsing (1) Qt creates window programs, message loops, and winmain Functions
Qt source code analysis (2
A common mistake many C + + beginners make is to allocate a chunk of memory with malloc, new, and forget to release, causing a memory leak. The QT object model provides a parent-child relationship between Qt objects, and when many objects are set up in a certain order, the parent-child relationship is organized into a tree. When you delete a parent object, the QT
As mentioned above, the Qt container class provides two traversal devices: Java and STL. The former is relatively easy to use, while the latter can be used in some algorithms with powerful functions. For each container class, there is a corresponding traversal: Read-only traversal and read/write traversal. The read-only traversal tool has three types: QVectorIterator 650) this. width = 650; "onclick = 'window. open (" http://blog.51cto.com/viewpic.php
long time no update (in fact, big do not have to constantly update it), has been using Qt4, recently thought to turn to QT5, Msys2 is self-brought QT, but the tool chain will often update, rely on more, easy to be convenient, did the last set of QT tool Update, title, Qt-4.8.7 as the QT4 version of the bottom of the press, using gcc-6.2.0 recompile , only 32-bit
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Friends who are new to Qt may feel mysterious and unfamiliar with the various macros that need to be declared during Qt usage. This article will introduce seve
This experience is mainly the author of the development of the QT program in the development of the problems encountered, and now share to everyone, mainly in QT embedded like resource files.Please leave a message if you have any questions.Tools/Materials
Qt Designer
Qt Open Source 4.8.5
Method/Step
A small record of qt Learning (2), qt Learning Record
Well... This time I received a ticket
A graphical interface is required. You can just consolidate and learn QT. I took it without hesitation.
The following issues are recorded:1. QWidget and QDialog
The slot functions in QDialog include accept () and reject (), which can be directly used.
In addition, the QDia
QT adds the program icon and window icon, and qt adds the icon windowProgram icon material preparation
Icon file: *. ico file, which is stored in the same directory as the source file, for example, "myapp. ico"
Write icon
Write "RC_ICONS = *. ico" into an independent row in the *. pro file, such as RC_ICONS = "myapp. ico"
Generate a program
Run the program to view the software with icons under the
Let's use an example to explain the application of the stylesheet. This example is based on the QT Demo, more complex, there is a certain degree of difficulty, basically covers the previous chapters of the various skill points, mainly including:
How to customize the style sheet for QT
How to apply a style sheet in an application
How to set the style of an application without using a style sheet
How to use a
Tags: ODBC change batch rollback CString set password SQL command moveqt-win-commercial-src-4.3.1, qt-x11-commercial-src-4.3.1Microsoft Visual C + + 6.0, KDevelop 3.5.0Windows Xp, Solaris 10, Fedora 8SQL Server, Oracle 10g Client , driver compilationThere are two database drivers to be mentioned here, namely ODBC and OCI The ODBC driver is compiled in the Windows operating system:Execute the following command to generate Qsqlodbc4.dll under the%qtdir
Many C/C ++ beginners often make the mistake of using malloc and new to allocate a piece of memory but forget to release it, resulting in Memory leakage. The QT object model provides a parent-child relationship between QT objects. When many objects establish this parent-child relationship in a certain order, they are organized into a tree. When deleting a parent object, QT's object model ensures that all it
using the AddWidget interface, adding a sub-layout using the Addlayout interface. This interface is not commonly used, and its usage principle is to add addwidget widgets and Addlayout layout to this variable.2) AddWidget (Qwidget *w) adds this widget to the specified layout, using the AddItem3) qsize closestacceptablesize (const qwidget * widget, const qsize size) [Static]Returns the size dimensions that meet all throttling policies to the widget, including Heightforwidth (), and as close to s
IfProgramFor example, if you need to load a large amount of data in advance, the program generally has a startup screen. In this way, the user can see that the program is being started rather than simply waiting for it. It also displays some useful information about the program, such as the Program Logo, function module, or product information.
In the QT application, you can use the qsplashscreen class to start the screen. The following is a simple
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