Applications=Code+Markup 读书笔记之五 Stack和Wrap

五、Stack和Wrap
1 类继承图
UIElemnet
  FrameworkElement
    Pannel(抽象类)
      Canvas
      DockPanel
      Grid
      StackPanel
      UniformGrid(网格中所有单元格大小相同)
      WrapPannel(和StackPannel类似，但可以让子元素放在下一行或列)

  Pancel定义了Children,类型是UIElementCollection, 用 Children.Add()增加子元素

2 StackPannel
2.1 向StackPannel中添加元素
  默认子元素的排列方式为垂直方向，statck.Orientation = Orientation.Horizontal;//设置水平放置
  FrameworkElement定义了FindName方法 eg：Button btn = FindName["XXX"] as Button;
 
  注：在事件处理器中获取产生事件的对象
      Button btn = sender as Button; 或 Button btn = args.Source as Button;
  

示例：向StackPannel中添加元素
  namespace Petzold.StackThirtyButtons
{
    class StackThirtyButtons : Window
    {
        [STAThread]
        public static void Main()
        {
            Application app = new Application();
            app.Run(new StackThirtyButtons());
        }
        public StackThirtyButtons()
        {
            Title = "Stack Thirty Buttons";
            SizeToContent = SizeToContent.WidthAndHeight;
            ResizeMode = ResizeMode.CanMinimize;
            // 注意：设置所以的按钮的单击事件，执行ButtonOnClick
            AddHandler(Button.ClickEvent, new RoutedEventHandler(ButtonOnClick));

            StackPanel stackMain = new StackPanel();
            stackMain.Orientation = Orientation.Horizontal;
            stackMain.Margin = new Thickness(5);
            Content = stackMain;

            for (int i = 0; i < 3; i++)
            {
                StackPanel stackChild = new StackPanel();
                stackMain.Children.Add(stackChild);

                for (int j = 0; j < 10; j++)
                {
                    Button btn = new Button();
                    btn.Content = "Button No. " + (10 * i + j + 1);
                    btn.Margin = new Thickness(5);
                    stackChild.Children.Add(btn);
                }
            }
        }
        void ButtonOnClick(object sender, RoutedEventArgs args)
        {
           // args.Source as Button,取得触发事件的元素
            MessageBox.Show("You clicked the button labeled " +
                            (args.Source as Button).Content);
        }
    }
}

  
2.2 ScrollView
可以显示滚动条
scroll.HorizontalScrollBarVisibility = ScrollBarVisibility.Visible;// 设置水平滚动条可见
scroll.VerticalScrollBarVisibility = ScrollBarVisibility.Visible;  // 设置垂直滚动条可见

2.3 ViewBox
使用 ViewBox 做容器，不显示滚动条，而是缩放容器中的子元素。
 Viewbox view = new Viewbox();
 Content = view;
 view.Child = stack; //缩放stack及其中的子元素
 
2.4 GroupBox

namespace Petzold.TuneTheRadio
{
    public class TuneTheRadio : Window
    {
        [STAThread]
        public static void Main()
        {
            Application app = new Application();
            app.Run(new TuneTheRadio());
        }
        public TuneTheRadio()
        {
            Title = "Tune the Radio";
            SizeToContent = SizeToContent.WidthAndHeight;

            GroupBox group = new GroupBox();
            group.Header = "Window Style";
            group.Margin = new Thickness(96);
            group.Padding = new Thickness(5);
            Content = group;

            StackPanel stack = new StackPanel();
            group.Content = stack;

            stack.Children.Add(
                CreateRadioButton("No border or caption", 
                                  WindowStyle.None));
            stack.Children.Add(
                CreateRadioButton("Single-border window", 
                                  WindowStyle.SingleBorderWindow));
            stack.Children.Add(
                CreateRadioButton("3D-border window", 
                                  WindowStyle.ThreeDBorderWindow));
            stack.Children.Add(
                CreateRadioButton("Tool window", 
                                  WindowStyle.ToolWindow));

            AddHandler(RadioButton.CheckedEvent, 
                       new RoutedEventHandler(RadioOnChecked));
        }
        RadioButton CreateRadioButton(string strText, WindowStyle winstyle)
        {
            RadioButton radio = new RadioButton();
            radio.Content = strText;
            radio.Tag = winstyle;
            radio.Margin = new Thickness(5);
            radio.IsChecked = (winstyle == WindowStyle);

            return radio;
        }
        void RadioOnChecked(object sender, RoutedEventArgs args)
        {
            RadioButton radio = args.Source as RadioButton;
            WindowStyle = (WindowStyle)radio.Tag;
        }
    }
}

 

 注：FileSystemInfo info;
     info is FileInfo; //判断是否是文件
     info is DirectoryInfo //判断是否是目录
     关于文件类的操作，参考“C#对文件和目录的操作”