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

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{{Template:I18n/Language Navigation Bar (zh_CN)|Development/Tutorials/创建主窗口}}
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{{Template:I18n/Language Navigation Bar|Development/Tutorials/Using_KXmlGuiWindow}}
 
{{TutorialBrowser|
 
{{TutorialBrowser|
  
series=初学者教程|
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series=Beginner Tutorial|
  
name=创建主窗口|
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name=How To Use KXmlGuiWindow|
  
pre=[[Development/Tutorials/First_program (zh_CN)|教程1 - Hello World]]|
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pre=[[Development/Tutorials/First_program|Tutorial 1 - Hello World]]|
  
next=[[Development/Tutorials/Using_KActions|教程3 - 使用KActions]]|  
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next=[[Development/Tutorials/Using_KActions|Tutorial 3 - KActions and XmlGui]]|  
  
 
reading={{class|KXmlGuiWindow}}
 
reading={{class|KXmlGuiWindow}}
 
}}
 
}}
  
== 摘要 ==
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==Abstract==
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。
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This tutorial carries on from [[Development/Tutorials/First_program|First Program Tutorial]] and will introduce the {{class|KXmlGuiWindow}} class.
  
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。
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In the previous tutorial, the program caused a dialog box to pop up but we're going to take steps towards a functioning application.
  
 
[[image:introtokdetutorial2.png|frame|center]]
 
[[image:introtokdetutorial2.png|frame|center]]
  
== 使用KXmlGuiWindow ==
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==Using KXmlGuiWindow==
  
为了得到一个可用的KXmlGuiWindow,我们必须对它子类化。为此,我们创建两个文件:<tt>mainwindow.cpp</tt><tt>mainwindow.h</tt>,在其中保存我们的派生类代码。我们的类继承自KXmlGuiWindow,因为它使用XML来定义程序的菜单结构。
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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===
 
===mainwindow.h===
Line 43: Line 43:
 
#endif
 
#endif
 
</code>
 
</code>
首先,我们在第7行声明了KXmlGuiWindow的一个派生类:<tt>class MainWindow : public KXmlGuiWindow</tt>.
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First we Subclass KXmlGuiWindow on line 7 with <tt>class MainWindow : public KXmlGuiWindow</tt>.
  
接下来我们声明了一个构造函数<tt>MainWindow(QWidget *parent=0);</tt>.
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Then we declare the constructor with <tt>MainWindow(QWidget *parent=0);</tt>.
  
最后我们定义了一个指针类型的成员变量,它将被用来指向我们用来构成程序主体的KTextEdit对象。{{class|KTextEdit}}是一个通用的RichText编辑器,并具有很多KDE特有的优点,如光标自动隐藏等。
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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===
 
===mainwindow.cpp===
Line 60: Line 60:
 
}
 
}
 
</code>
 
</code>
首先,很自然的,我们在第一行首先声明包含了含有类声明的头文件。
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First, of course, on line 1 we have to include the header file containing the class declaration.
  
在第五行,我们初始化了一个KTextEdit对象并将它赋给之前定义的成员变量。接下来在第6行,我们调用<tt>KXmlGuiWindow</tt>内置的<tt>setCentralWidget()</tt>函数,它告诉程序应该将什么东西显示在窗口的中央。
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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.
  
最终, <tt>KXmlGuiWindow::setupGUI()</tt>被调用,它会替我们完成很多底层的工作,并创建一个缺省的菜单(包含“设置”和“帮助”)
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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==
 
==Back to main.cpp==
为了能够实际运行前面定义的窗口, 我们还需要在<tt>main.cpp</tt>中增加一些代码:
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In order to actually run this window, we need to add a few lines in main.cpp:
 
===main.cpp===
 
===main.cpp===
 
<code cppqt>
 
<code cppqt>
Line 93: Line 93:
 
}
 
}
 
</code>
 
</code>
与第一讲相比,这里唯一新增加的行就是第18和19行。在第18行,我们生成了一个MainWindow类的对象实例,然后在第19行显示它。
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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==
 
==CMake==
构建此程序的最好方法是使用CMake。与第一讲中的CMakeLists.txt文件相比,唯一的改变是<tt>mainwindow.cpp</tt>被增加到了源文件列表中,以及<tt>tutorial1</tt>变成了<tt>tutorial2</tt>
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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===
 
===CMakeLists.txt===
 
<code ini>
 
<code ini>
Line 113: Line 113:
 
</code>
 
</code>
  
=== 编译运行 ===
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===Compile it===
要编译、链接以及运行该程序,使用下面的命令:
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To compile, link and run it, use:
 
  cmake . && make && ./tutorial2
 
  cmake . && make && ./tutorial2
  
== 继续前进 ==
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==Moving On==
接下来你可以继续学习下一讲[[Development/Tutorials/Using_KActions (zh_CN)|使用KActions]].
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Now you can move on to [[Development/Tutorials/Using_KActions|using KActions]].
  
 
[[Category:C++]]
 
[[Category:C++]]

Revision as of 07:36, 25 September 2007


Contents

Development/Tutorials/Using_KXmlGuiWindow

How To Use KXmlGuiWindow
Tutorial Series   Beginner Tutorial
Previous   Tutorial 1 - Hello World
What's Next   Tutorial 3 - KActions and XmlGui
Further Reading   KXmlGuiWindow

Abstract

This tutorial carries on from First Program Tutorial and will introduce the KXmlGuiWindow class.

In the previous tutorial, the program caused a dialog box to pop up but we're going to take steps towards a functioning application.

Introtokdetutorial2.png

Using KXmlGuiWindow

In order to have a useful KXmlGuiWindow, we must subclass it. So we create two files, a mainwindow.cpp and a mainwindow.h 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

  1. ifndef MAINWINDOW_H
  2. define MAINWINDOW_H
  1. include <KXmlGuiWindow>
  2. include <KTextEdit>

class MainWindow : public KXmlGuiWindow {

 public:
   MainWindow(QWidget *parent=0);
 private:
   KTextEdit* textArea;

};

  1. endif

First we Subclass KXmlGuiWindow on line 7 with class MainWindow : public KXmlGuiWindow.

Then we declare the constructor with MainWindow(QWidget *parent=0);.

And finally we declare a pointer to the object that will make up the bulk of our program. KTextEdit is a generic richtext editor with some KDE niceties like cursor auto-hiding.

mainwindow.cpp

  1. include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent) : KXmlGuiWindow(parent) {

 textArea = new KTextEdit;
 setCentralWidget(textArea);
 setupGUI();

} 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

  1. include <KApplication>
  2. include <KAboutData>
  3. include <KCmdLineArgs>
  1. 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();

} 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 mainwindow.cpp has been added to the sources list and any tutorial1 has become tutorial2.

CMakeLists.txt

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})

Compile it

To compile, link and run it, use:

cmake . && make && ./tutorial2

Moving On

Now you can move on to using KActions.


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