qt beaglebone

fourth argument buttons, the button that declares the dialog box, and the default is to place an OK button. This parameter can be used or the operation, for example we want to have a Yes and a No button, you can use Qmessagebox::yes | Qmessagebox::no, All button types can be found in the Standarbutton enumeration of the Qmessagebox declaration, the fifth parameter DefaultButton is the default selected button, and the default value is Nobutton, That is, which button is not selected. So many para

How to get the screen size in Qt. First call a static method in the Qapplication class, as follows: Qdesktopwidget *qapplication::d esktop () The Qapplication class is used to manage the control flow and primary settings for GUI applications, with the following derived relationships: QApplication:QGuiApplication:QCoreApplication:QObject In the main program, it must be qapplication rather than qguiapplication or qcoreapplication, otherwise there will

I recommend that you read a lot of posts about building the QT development platform on the Internet, but I found that the above posts are older and are intended for older versions of QT. I like to use a newer version of things. I believe the new version is definitely better than the old version. The new version of QT is really easy to use and easy to build. When

Address: http://www.cnblogs.com/lishixian/articles/3013897.html lsx_007Here is the main record of their own embedded development environment to read some of the valuable reference documents, the document is mainly from the network, because it is downloaded from the library, so do not know where the document? Because the personal feel that the summary is better, I take it for the record, of course, on this basis will also add my own understanding! This article is mainly organized in the form of q

HTML>Scriptlanguage= "JavaScript"> functionQtcalljs () {alert ("SDFSD"); } functionjscallqt () {mainwindow.dosome (); }Script>Body>Buttononclick= "JSCALLQT ()"style= = "height:20px;width:100px"/>Body>HTML>Qt.h:#ifndef Qttt_h#defineQttt_h#include#include#include#include#include#include"ui_qttt.h"classQTTT: Publicqmainwindow{Q_object Public: qttt (Qwidget*parent =0, Qt::wflags flags =0); ~qttt ();Private: Ui::qtttclass Ui;PrivateSlots:voidpop ();

possible, otherwise it will also put the interface card dead;2, the timer is not accurate, because it needs to be placed in the event loop processing, so if other events occupy more events, will cause the timer is not accurateThird, create the threadIn Qt, thread-related classes:Qthread: ThreadQmutex: Mutual exclusion lockQsemaphore: Signal VolumeMethods for creating Threads:1. Derive a thread class, inherit from Qthread, and then rewrite the entry f

How to install Qt Chart 5.7.0 can refer to this blog post http://blog.csdn.net/accelerated1987/article/details/50564312.After the installation is complete, create a new widget project, and then add the components by following the steps below.1 . Add QT + = charts in Pro file. 1. Add a widget component to the interface using QT Creator, and then promote to Qchartv

Application Requirements:There is such a requirement in the development of the network disk. That is, the file version number control, that is, the record file version number of the replacement information, where the replacement information is not recorded in a different time file changes, that is, the file of the increase, deletion, alteration, renaming and other operations. A file is saved under each folder to be monitored. Record incremental information for file changes. Each time the low ver

this place, and if you use qurl::fromlocalfile for processing, you can open the folder normally:QDesktopServices::openUrl(QUrl::fromLocalFile(QApplication::applicationDirPath()+SAVEDIR));In addition, there is a problem with this code-Independent: QT Call VC write dynamic Library, VC need to use C way output function, otherwise MinGW32 compile process will error, namely:Example VC DLL header file:? 12345678910111213 #ifndef cdoublere

verified by the validator validator or the input mask inputmask, or both, in order to ensure the validity of the input content, to a large extent can avoid the difficulty of the input diversity check.1. Qlineedit Important attributes1) Echomode, decide how to input and display text to use, output display mode, Echomode echomode access, Setechomode (Echomode) to set2) Acceptableinput:bool, whether the input satisfies the InputMask and validator authentication, is used to specify the content form

Environment:windows 7 + VS2013 + Qt5.3.0 + addin1.2.4Analyse: .vcxproj.user is user profile, saving user data. when you create a QT application project, you will Add the following two lines of content to the. vcxproj.user file . //indicates the absolute path of the Qtdirlocaldebuggerenvironment>//JOIN environment variable vs this two-line content obtains the Qtdir path, before joins the running environment.So when uploading the code, you need t

Introduction to qt animation and qt AnimationThe Qt-4.6 adds the Animation Framework, which allows us to easily write some vivid programs. Like in previous versions, all controls are boring and stay in the great and glorious QLayout. Maybe they can sing a song and dance.The so-called animation has different States at different time points within a period of time.

C ++ memo-QT (3), Memo-qt Guess digital games All content of this blog is original, if reproduced please indicate the source http://blog.csdn.net/myhaspl/ Main. cpp /* * Guess digital games * Author: http://blog.csdn.net/myhaspl * Date: 2015.02.25 */ # Include # Include "guessdialog. h" Intmain (intargc, char * argv []) { QApplicationapp (argc, argv ); GuessDialog * myDialog = newGuessDialog; MyDialog-> sh

Summary of the QT open file dialog box, And the qt open file dialog boxQstring fileName = QFileDialog: getOpenFileName (this, tr ("open file"), "", tr ("Allfile (*. *); mp3file (*. mp3) "); Note: a dialog box is generated, which is similar to the system resource manager. The absolute path of the selected file is returned. Parameter 1: parent windowParameter 2: The title of the dialog boxParameter 3: Default

Let's continue with the standard dialog box of QT. This time we will talk about qcolordialog. This is the color selection dialog box provided by QT. It is also easy to use qcolordialog. QT provides the getcolor () function, which is similar to the getopenfilename () function of qfiledialog and can directly obtain the selected color. We still use the previous qact

Label: style blog HTTP Io OS AR for SP File Common QT classes Output text to the console In the first example, we use STL: Console. cpp #include In the second example, we use the qt4 programming library. Console2.cpp #include Output console applicationQfile Write a line of string to the file File. cpp #include Output $ cat myfile You make me want to be a better man. The following example shows how to output a piece of text to the console

Qt Style Sheets Examples We'll now see a few examples to get started with using Qt Style Sheets. Style Sheet Usage Customizing the Foreground and Background Colors Let's start by setting yellow as the background color of all qlineedits in an application. This could is achieved like this: Qapp->setstylesheet ("Qlineedit {background-color:yellow}"); If we want the property to apply Qlineedits is children (o

Tags: qt gdb makefile parametersIn Qt, to add the relevant compilation parameters in the makefile can be achieved by modifying them in the Xx.pro file:Implemented in Xx.pro by using the Qmake_cxxflags setting (for example, to add gdb debug parameters)Qmake_cxxflags + =-g (may appear in the Xx.pro file is black, others appear to have purple)After recompiling, you can use the GDB command to debug.This article

QtC + + Graphical user interface application Development framework.The origin and development of QT　　1. qt OriginHaavard Nord and Eirik Chambe-eng started the development of "Qt" in 1991, the company was founded on March 4, 1994, early named Quasar Technologies, then renamed Troll Tech, and then changed to Trolltech, Chinese name is "Science and technology". The

The Book of qt4 (1.5 QT overview) The Book of qt4 Translation Qt programming Art --------------------------------------------------------------------------------- Original Name: The Book of QT 4: The art of building QT applications The Book of QT 4 Chinese version: