Difference between revisions of "Development/Tutorials/Using KXmlGuiWindow"

(Replaced content with "This page was moved [https://develop.kde.org/docs/getting-started/main_window/ here]")
Tag: Replaced
 
(43 intermediate revisions by 14 users not shown)
Line 1: Line 1:
{{Template:I18n/Language Navigation Bar (zh_CN)|Development/Tutorials/创建主窗口}}
+
This page was moved [https://develop.kde.org/docs/getting-started/main_window/ here]
{{TutorialBrowser|
 
 
 
series=初学者教程|
 
 
 
name=创建主窗口|
 
 
 
pre=[[Development/Tutorials/First_program (zh_CN)|教程1 - Hello World]]|
 
 
 
next=[[Development/Tutorials/Using_KActions|教程3 - 使用KActions]]|
 
 
 
reading={{class|KXmlGuiWindow}}
 
}}
 
 
 
== 摘要 ==
 
本教程承接上一讲[[Development/Tutorials/First_program (zh_CN)|教程1 - Hello World]] ,进一步介绍{{class|KXmlGuiWindow}}类的使用。
 
 
 
在上一讲中,程序只是显示了一个弹出框。在本讲中,我们要让我们的程序具备更加实际功能。
 
 
 
[[image:introtokdetutorial2.png|frame|center]]
 
 
 
== 使用KXmlGuiWindow ==
 
 
 
In order to have a useful KXmlGuiWindow, we must subclass it. So we create two files, a <tt>mainwindow.cpp</tt> and a <tt>mainwindow.h</tt> which will contain our code. Our class inherits from KXmlGuiWindow because it uses XML e.g. to define the application's menu structure.
 
 
 
===mainwindow.h===
 
<code cppqt>
 
#ifndef MAINWINDOW_H
 
#define MAINWINDOW_H
 
 
 
#include <KXmlGuiWindow>
 
#include <KTextEdit>
 
 
 
class MainWindow : public KXmlGuiWindow
 
{
 
  public:
 
    MainWindow(QWidget *parent=0);
 
 
  private:
 
    KTextEdit* textArea;
 
};
 
 
 
#endif
 
</code>
 
First we Subclass KXmlGuiWindow on line 7 with <tt>class MainWindow : public KXmlGuiWindow</tt>.
 
 
 
Then we declare the constructor with <tt>MainWindow(QWidget *parent=0);</tt>.
 
 
 
And finally we declare a pointer to the object that will make up the bulk of our program. {{class|KTextEdit}} is a generic richtext editor with some KDE niceties like cursor auto-hiding.
 
 
 
===mainwindow.cpp===
 
<code cppqt>
 
#include "mainwindow.h"
 
 
 
MainWindow::MainWindow(QWidget *parent) : KXmlGuiWindow(parent)
 
{
 
  textArea = new KTextEdit;
 
  setCentralWidget(textArea);
 
  setupGUI();
 
}
 
</code>
 
First, of course, on line 1 we have to include the header file containing the class declaration.
 
 
 
On line 5, we initialise our text editor with an object. Then on line 6 we use the built-in setCentralWidget() function which tells the KXmlGuiWindow what should appear in the central section of the window.
 
 
 
Finally, KXmlGuiWindow::setupGUI() is called which does a lot of behind-the-scenes stuff and creates the default menu bars (Settings, Help).
 
 
 
==Back to main.cpp==
 
In order to actually run this window, we need to add a few lines in main.cpp:
 
===main.cpp===
 
<code cppqt>
 
#include <KApplication>
 
#include <KAboutData>
 
#include <KCmdLineArgs>
 
 
 
#include "mainwindow.h"
 
 
 
int main (int argc, char *argv[])
 
{
 
  KAboutData aboutData( "tutorial2", 0,
 
      ki18n("Tutorial 2"), "1.0",
 
      ki18n("A simple text area"),
 
      KAboutData::License_GPL,
 
      ki18n("Copyright (c) 2007 Developer") );
 
  KCmdLineArgs::init( argc, argv, &aboutData );
 
 
 
  KApplication app;
 
 
  MainWindow* window = new MainWindow();
 
  window->show();
 
 
 
  return app.exec();
 
}
 
</code>
 
The only new lines here (compared to Tutorial 1) are 18 and 19. On line 18, we create our MainWindow object and then on line 19, we display it.
 
 
 
==CMake==
 
The best way to build the program is to use CMake. All that's changed since tutorial 1 is that <tt>mainwindow.cpp</tt> has been added to the sources list and any <tt>tutorial1</tt> has become <tt>tutorial2</tt>.
 
===CMakeLists.txt===
 
<code ini>
 
project (tutorial2)
 
 
 
find_package(KDE4 REQUIRED)
 
include_directories( ${KDE4_INCLUDES} )
 
 
 
set(tutorial2_SRCS
 
main.cpp
 
mainwindow.cpp
 
)
 
 
 
kde4_add_executable(tutorial2 ${tutorial2_SRCS})
 
target_link_libraries( tutorial2 ${KDE4_KDEUI_LIBS})
 
</code>
 
 
 
=== 编译运行 ===
 
To compile, link and run it, use:
 
cmake . && make && ./tutorial2
 
 
 
== 继续前进 ==
 
Now you can move on to [[Development/Tutorials/Using_KActions|using KActions]].
 
 
 
[[Category:C++]]
 

Latest revision as of 14:32, 8 September 2020

This page was moved here


This page was last edited on 8 September 2020, at 14:32. Content is available under Creative Commons License SA 4.0 unless otherwise noted.