what's unique to qt - events.static.linuxfound.org · ・webkit's html and javascript...
TRANSCRIPT
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What's unique to Qt
Junior High School at Otsuka, University of Tsukuba“Ubuntu Japanese Translators” team
luyikei盧 亦愷
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Self Introduction①
・ I was born in Fukushima in 1997.・ Now I live in Tokyo.
・ When I began to use a computer at age 6,I had a mouse in my right hand, and a
baby bottle in my left hand
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Self Introduction②
・ My first computer language is HTML.→Since I was 4th grade.
・ My second computer language is Visual Basic.→Since I was 7th grade.
・ My third computer language is Python→Since I was 8th grade.
・ I love Qt!→Since I was 9th grade.
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Contents
・ My first Linux time
・ Why do I use Linux
・ How I develop GUI application on Linux
・ Visual C++ 2010 vs Qt4
・ Qt vs GTK+
・ What is unique to Qt4?
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❶ My first Linux
・ I will talk about my Linux for the first time.
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One day...
・ I was using computer with Windows.
&
SOTEC A4170AV Windows XP SP2
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Ahhhhhhhhhhhhhhhhhh!
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After a few days.
・ I checked my computer with Nortn Anti Virus...
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Ahhhhhhhhhhhhhhhhhhhhh!
VS Virus360X
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My first solution is ...
・ Recoveried with Symantec Ghost
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After few weeks...
・ Again!
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My second solution is...
・ Memtest86.
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Give up!
・ I rescued my data from my computer with KNOOPIX live cd.→This time was first time to use Linux.
・ I managed to recover my computer by Replacing its memory.
old new
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Now
I brought a new computer, and I installed Kubuntu.
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❷ Why do I use Linux?
・ The reason is simple.①Ubuntu is easy to use!!!!!!!!!!!!!!!!!!!!
②I don't like Windows design.
③To study server build.
④Ubuntu is light!
⑤Software manage is easy.
⑥Linux is good at study programming
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❸How I develop GUI application on Linux
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My first GUI programming.
・ My first GUI programming is Visual Basic.→It is easy and quick. But...
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Oh my God!
・ My software can't working on Linux!
onVisual Studio 2010(.net framework)
Linux
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I hope ...
・ I want to developing software that runs both on Windows and onLinux.
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My solution is...
→Learning Qt programming.
・ Qt is a cross-platform application framework .
・ Qt's native language is C++.
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Qt works on ...①
Qt works on the following platforms:
・ Windows・ Windows CE・ Mac OS X・ Symbian・ Embedded Linux・ X Window System・ Wayland
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Qt works on ...②
External ports:→Since Nokia opened the Qt source code
to the community on Gitorious various ports have been appearing. (by wikipedia)
・ OpenSolaris ・ Haiku・ OS/2 ・ iPhone ・ webOS・ Amazon Kindle・ Android・ BlackBerry
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Qt is used by ...
KDEUbuntu Unity 2D Adobe Photoshop ElementsAdobe After Effects CS5Adobe Premiere Pro CS5Autodesk Maya 2011VLCNukeGoogle EarthSkypeQCadRosegardenMuseScoreMuse
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Qt can fit your PC's Theme
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Easy program developed by Qt①
・ I will make the program that can change letters on the button.
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Step1
・ Set the button on the form.
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Step2
・ Right-click on an button, and select “Go to slot...”
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Step3
・ Select “clicked()”
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Step4
・ Write code “ui->puchButton->setText(“aaa”);”
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Step5
Clicked
・ It's complete. Run!
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Easy program developed by Qt②
・ I will make the software without writing any code.
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Step1
・ Set QDial on form.
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Step2
・ Set QSlider on form too.
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Step3
・ Connect Qdial with QSilder.
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Step4
Setting up the SIGNAL and SLOT
SIGNAL: QDial - valueChangedSLOT: Qslider - setValue
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Step5
・ Done!
valueChanged
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❹Visual C++ 2010 vs Qt4
・ Round1: IDE
・ Round2: Speed
・ Round3: Other
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Round1 : IDE
・ Visual Studio IDE
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Round1 : IDE
・ Qt Creator
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Code completion
・ Qt Creator ・ Visual Studio 2010 IDE (C++/CLI)
It hasn't code completion.!!
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Layout
・ Qt Creator ・ Visual Studio 2010 IDE (C++/CLI)
・ Many layout tools
・ It has not good layout tools.
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Round2: Speed
・ I'll compare the speed of Visual C++ 2010 with that of Qt4
・ Qt4 Code ・ Visual C++ 2010 Code
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The resault is...
・ Qt4 ・ Visual C++ 2010
18
・ Qt4
2 SecondSecond
Wow!
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Round 3 Other
・ font
Qt Creator Visual Studio IDE
Which is better?
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enlargement
Qt4 Visual C++ 2010
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Web Rendering engine
・ Qt4 is Webkit ・ Visual C++ 2010 is Trident
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What is webkit?
・ Webkit is used by Safari , Google Chrome
≒
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Actually
・ WebKit's HTML and JavaScript code originally began as a fork of the KHTML and KJS libraries from KDE,
・ KHTML is the HTML layout engine developed by the KDE project.
・ It used by Konqueror.
・ Now Webkit is developed byApple, KDE, Nokia, Google, etc...
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How about Trident?
・ Trident is used by Internet Explorer. X-)
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I have built Simple Browser
With Qt4 With Visual C++ 2010 (C++/CLI)
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And Judgment Browser type by Java Script
<SCRIPT type="text/javascript">
var userAgent = window.navigator.userAgent.toLowerCase();var appVersion = window.navigator.appVersion.toLowerCase();
if (userAgent.indexOf("msie") > -1) {if (appVersion.indexOf("msie 6.0") > -1) {
alert("IE6");}else if (appVersion.indexOf("msie 7.0") > -1) {
alert("IE7");}else if (appVersion.indexOf("msie 8.0") > -1) {
alert("IE8");}else {
alert("Unknown");}
}else if (userAgent.indexOf("firefox") > -1) {
alert("Firefox");}else if (userAgent.indexOf("opera") > -1) {
alert("Opera");}else if (userAgent.indexOf("chrome") > -1) {
alert("Google Chrome");}else if (userAgent.indexOf("safari") > -1) {
alert("Safari");}else {
alert("Unknown");}
</SCRIPT>
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Resualt
・ Qt Browser is...Safari
・ Visual C++ Browser is...Internet Explorer 7
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Which Is Better?
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Acid2 Browser Test
Acid2 is a test page published and promoted by the Web Standards Project to expose web page rendering flaws in web browsers and other applications that render HTML.
Correct result
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Result is...
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Ahhhhhhhhhhhhhh!
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Acid 3 Browser Test
Acid3 test is a web test page from the Web Standards Project that checks a web browser's compliance with elements of various web standards, particularly the Document Object Model (DOM) and JavaScript.
Correct result
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Result is...
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Ahhhhhhhhhhhhhh!
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Support languages
・ Qt4・ Ada・ C++・ C# & .NET・ D・ Haskell・ Harbour・ Java・ Lisp・ Lua・ Pascal
・ Visual Studio・ Visual Basic・ Visual C#・ Visual C++
・ Perl・ PHP・ Python・ QML・ R・ Ruby・ Scheme・ Tcl ・ Qt4 wins landslide victory!!!
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You can develop software with Qt now!
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How about other GUI tool kit?
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❺ Qt vs GTK+
vs
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GTK+ works on ...
Official・ X Window System・ Windows・ Mac OS X
Developing...・ HTML5・ Wayland
GTK+ is lesser than Qt.
15 5:
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IDE
Qt Creator Anjuta Qt Creator
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GTK+ doesn't have an official IDE.And It's not easy to use than Qt Creater.
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Hello World Program
・ Qt
#include <QtGui> int main(int argc, char *argv[]) { QApplication app(argc, argv); QLabel label("Hello, world!"); label.show(); return app.exec(); }
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GTK+ is ...
#include <gtk/gtk.h> int main (int argc, char *argv[]) { GtkWidget *window; GtkWidget *label; gtk_init (&argc, &argv); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL); label = gtk_label_new ("Hello, World"); gtk_container_add (GTK_CONTAINER (window), label); gtk_widget_show_all (window); gtk_main (); return 0; }
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Worst weakness
・ If you make a program of GTK+ except for GIMP and Pidgin, doesn't work Japanese input method on Windows and Mac OS X
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❻ What is unique to Qt4?
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Code less.
・ As I have already mentioned before, Qt is code less.
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SIGNAL and SLOT
・ The mechanism of SIGNAL and SLOT,We don't need any code often!
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Create more.
・ Qt has a good IDE that Qt Creater!
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Deploy everywhere.
・ As I have already mentioned before,Qt is a cross-platform application framework .
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Thank you!
・ Thank you for listening!I'll be happy if you like qt!