zoukankan      html  css  js  c++  java
  • Extract UserControls from IssueVision Part I PaneCaption

    IssueVision is the code example for Smart Client at DevDays 2004. You can get more infomation from DevDays 2004 video .

    There are several XP style UserControls contained in this solution. Now, let's extract them for our own projects.

    PaneCaption



    PaneCaption draws the caption for each pane. Contains an active state and draws the caption different for each state. Caption is drawn with a gradient fill and antialias font.

    Just pick out two files, PaneCaption.cs PaneCaption.resx, we can extract this control.

    Create your new “windows control library” project MyControls and add the tow files to your project folder. Build this project and test it in another project.

    ok, it's working now!

    oh, wait! Why AnitAlias dose not work? I changed again and again, but it is only available in design time! What's wrong ?

    yeah, you find out a little bug (i think it belongs the IDE what i am using -- VS.NET2003). Let's defeat it.

    look at the following codes:

    private bool m_antiAlias = false; 

     

      [CategoryAttribute(
    "Appearance")]
      [DescriptionAttribute(
    "If should draw the text as antialiased.")]
      [DefaultValueAttribute(
    true)]
      
    public bool AntiAlias {
       
    get {
        
    return m_antiAlias;
       }
     

       
    set {
        m_antiAlias 
    = value;
        Invalidate();
       }

      }
     

    understood?

    what? did not?

    oh, my god. Let me explain.

    “[DefaultValueAttribute(true)]” means the default value of this property(AntiAlias) is “true“; “private bool m_antiAlias = false;“ means it sets the property variant into “false“ when you put the control on form(design time).

    As we known, in visual studio, it will modify the InitializeComponent() automatically when you changed a value in property toolbox. Now, the initialized value is “false” not the default value “true”. Obviously, the IDE think it's the default value! So, it write the opposite code.

    Thus, modify “private bool m_antiAlias = false;”into “private bool m_antiAlias = true;”then you will enable “AntiAlias” ability.

    Moreover, AllowActive has this problem too. I believe you can solve it yourself.

    Enjoy it. ;)

  • 相关阅读:
    python数据结构之字典
    Python数据结构之列表
    使用QrCode生成二维码
    JavaScript在不同环境下的全局对象
    记一次使用 removeEventListener 移除事件监听失败的经历
    Model、View、ViewModel结构以及全局视图模型注入器的说明
    MVVMLight介绍以及在项目中的使用
    WPF/Silverlight深度解决方案:(一)解锁被Storyboard束缚的关联属性
    进程发送消息
    .net4.0中wpf单例启动
  • 原文地址:https://www.cnblogs.com/Samuel/p/61996.html
Copyright © 2011-2022 走看看