StatusBarDrawItemEventArgs 类

参考

定义

命名空间:: System.Windows.Forms

程序集:: System.Windows.Forms.dll

重要

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为 DrawItem 事件提供数据。

public ref class StatusBarDrawItemEventArgs : System::Windows::Forms::DrawItemEventArgs

public class StatusBarDrawItemEventArgs : System.Windows.Forms.DrawItemEventArgs

type StatusBarDrawItemEventArgs = class
    inherit DrawItemEventArgs

Public Class StatusBarDrawItemEventArgs
Inherits DrawItemEventArgs

继承: Object

EventArgs

DrawItemEventArgs
StatusBarDrawItemEventArgs

示例

下面的代码示例演示如何使用 Style 属性、 StatusBarDrawItemEventHandler 委托、 StatusBarDrawItemEventArgs 类、 StatusBarPanelStyle 枚举和 StatusBarDrawItemEventArgs.Panel 属性。若要运行该示例，请将以下代码粘贴到窗体中。 InitializeStatusBarPanels在窗体的构造函数或 Load 方法中调用方法。

StatusBar^ StatusBar1;
void InitializeStatusBarPanels()
{
   StatusBar1 = gcnew StatusBar;
   
   // Create two StatusBarPanel objects.
   StatusBarPanel^ panel1 = gcnew StatusBarPanel;
   StatusBarPanel^ panel2 = gcnew StatusBarPanel;
   
   // Set the style of the panels.  
   // panel1 will be owner-drawn.
   panel1->Style = StatusBarPanelStyle::OwnerDraw;
   
   // The panel2 object will be drawn by the operating system.
   panel2->Style = StatusBarPanelStyle::Text;
   
   // Set the text of both panels to the same date string.
   panel1->Text = System::DateTime::Today.ToShortDateString();
   panel2->Text = System::DateTime::Today.ToShortDateString();
   
   // Add both panels to the StatusBar.
   StatusBar1->Panels->Add( panel1 );
   StatusBar1->Panels->Add( panel2 );
   
   // Make panels visible by setting the ShowPanels 
   // property to True.
   StatusBar1->ShowPanels = true;
   
   // Associate the event-handling method with the DrawItem event 
   // for the owner-drawn panel.
   StatusBar1->DrawItem += gcnew StatusBarDrawItemEventHandler( this, &Form1::DrawCustomStatusBarPanel );
   this->Controls->Add( StatusBar1 );
}


// Draw the panel.
void DrawCustomStatusBarPanel( Object^ sender, StatusBarDrawItemEventArgs^ e )
{
   
   // Draw a blue background in the owner-drawn panel.
   e->Graphics->FillRectangle( Brushes::AliceBlue, e->Bounds );
   
   // Create a StringFormat object to align text in the panel.
   StringFormat^ textFormat = gcnew StringFormat;
   
   // Center the text in the middle of the line.
   textFormat->LineAlignment = StringAlignment::Center;
   
   // Align the text to the left.
   textFormat->Alignment = StringAlignment::Far;
   
   // Draw the panel's text in dark blue using the Panel 
   // and Bounds properties of the StatusBarEventArgs object 
   // and the StringFormat object.
   e->Graphics->DrawString( e->Panel->Text, StatusBar1->Font, Brushes::DarkBlue, RectangleF(e->Bounds.X,e->Bounds.Y,e->Bounds.Width,e->Bounds.Height), textFormat );
}

private StatusBar StatusBar1;

private void InitializeStatusBarPanels()
{
    StatusBar1 = new StatusBar();

    // Create two StatusBarPanel objects.
    StatusBarPanel panel1 = new StatusBarPanel();
    StatusBarPanel panel2 = new StatusBarPanel();

    // Set the style of the panels.  
    // panel1 will be owner-drawn.
    panel1.Style = StatusBarPanelStyle.OwnerDraw;

    // The panel2 object will be drawn by the operating system.
    panel2.Style = StatusBarPanelStyle.Text;

    // Set the text of both panels to the same date string.
    panel1.Text = System.DateTime.Today.ToShortDateString();
    panel2.Text = System.DateTime.Today.ToShortDateString();

    // Add both panels to the StatusBar.
    StatusBar1.Panels.Add(panel1);
    StatusBar1.Panels.Add(panel2);

    // Make panels visible by setting the ShowPanels 
    // property to True.
    StatusBar1.ShowPanels = true;

    // Associate the event-handling method with the DrawItem event 
    // for the owner-drawn panel.
    StatusBar1.DrawItem += 
        new StatusBarDrawItemEventHandler(DrawCustomStatusBarPanel);
        
    this.Controls.Add(StatusBar1);
}

// Draw the panel.
private void DrawCustomStatusBarPanel(object sender, 
    StatusBarDrawItemEventArgs e)
{

    // Draw a blue background in the owner-drawn panel.
    e.Graphics.FillRectangle(Brushes.AliceBlue, e.Bounds);

    // Create a StringFormat object to align text in the panel.
    StringFormat textFormat = new StringFormat();

    // Center the text in the middle of the line.
    textFormat.LineAlignment = StringAlignment.Center;

    // Align the text to the left.
    textFormat.Alignment = StringAlignment.Far;

    // Draw the panel's text in dark blue using the Panel 
    // and Bounds properties of the StatusBarEventArgs object 
    // and the StringFormat object.
    e.Graphics.DrawString(e.Panel.Text, StatusBar1.Font, 
        Brushes.DarkBlue, new RectangleF(e.Bounds.X, 
        e.Bounds.Y, e.Bounds.Width, e.Bounds.Height), textFormat);
}

Private StatusBar1 As StatusBar

Private Sub InitializeStatusBarPanels()
    StatusBar1 = New StatusBar

    ' Create two StatusBarPanel objects.
    Dim panel1 As New StatusBarPanel
    Dim panel2 As New StatusBarPanel

    ' Set the style of the panels.  
    ' panel1 will be owner-drawn.
    panel1.Style = StatusBarPanelStyle.OwnerDraw

    ' The panel2 object will be drawn by the operating system.
    panel2.Style = StatusBarPanelStyle.Text

    ' Set the text of both panels to the same date string.
    panel1.Text = DateTime.Today.ToShortDateString()
    panel2.Text = DateTime.Today.ToShortDateString()

    ' Add both panels to the StatusBar.
    StatusBar1.Panels.Add(panel1)
    StatusBar1.Panels.Add(panel2)

    ' Make panels visible by setting the ShowPanels 
    ' property to True.
    StatusBar1.ShowPanels = True

    ' Use the AddHandler syntax to handle the DrawItem event
    ' for the owner-drawn panel.
    AddHandler StatusBar1.DrawItem, _
        New StatusBarDrawItemEventHandler( _
        AddressOf DrawCustomStatusBarPanel)
    Me.Controls.Add(StatusBar1)
End Sub

' Draw the panel.
Private Sub DrawCustomStatusBarPanel(ByVal sender As Object, _
    ByVal e As StatusBarDrawItemEventArgs)

    ' Draw a blue background in the owner-drawn panel.
    e.Graphics.FillRectangle(Brushes.AliceBlue, e.Bounds)

    ' Create a StringFormat object to align text in the panel.
    Dim textFormat As New StringFormat

    ' Center the text in the middle of the line.
    textFormat.LineAlignment = StringAlignment.Center

    ' Align the text to the left.
    textFormat.Alignment = StringAlignment.Far

    ' Draw the panel's text in dark blue using the Panel 
    ' and Bounds properties of the StatusBarEventArgs object 
    ' and the StringFormat object.
    e.Graphics.DrawString(e.Panel.Text, StatusBar1.Font, _
          Brushes.DarkBlue, New RectangleF(e.Bounds.X, e.Bounds.Y, _
          e.Bounds.Width, e.Bounds.Height), textFormat)

End Sub

注解

当 DrawItem 所有者绘制 StatusBarPanel 的视觉方面发生更改时，将发生该事件。 Graphics指定StatusBarDrawItemEventArgs用于绘制面板的对象、Rectangle要在其中绘制面板的对象、面板标识号、有关面板的状态信息以及要绘制的面板。可以在事件的事件处理程序 DrawItem 中使用此类提供的数据，在应用程序的 StatusBar 控件中创建自定义面板。

构造函数

StatusBarDrawItemEventArgs(Graphics, Font, Rectangle, Int32, DrawItemState, StatusBarPanel)	初始化 StatusBarDrawItemEventArgs 类的新实例，而不指定 StatusBarPanel 的背景和前景色。
StatusBarDrawItemEventArgs(Graphics, Font, Rectangle, Int32, DrawItemState, StatusBarPanel, Color, Color)	使用为 StatusBarDrawItemEventArgs 指定的前景色和背景色，初始化 StatusBarPanel 的新实例。

属性

BackColor	获取所绘制的项的背景色。 (继承自 DrawItemEventArgs)
Bounds	获取表示所绘制项的边界的矩形。 (继承自 DrawItemEventArgs)
Font	获取分配给所绘制项的字体。 (继承自 DrawItemEventArgs)
ForeColor	获取所绘制项的前景色。 (继承自 DrawItemEventArgs)
Graphics	获取要在其上绘制项的图形表面。 (继承自 DrawItemEventArgs)
Index	获取所绘制项的索引值。 (继承自 DrawItemEventArgs)
Panel	获取要绘制的 StatusBarPanel。
State	获取所绘制项的状态。 (继承自 DrawItemEventArgs)

方法

Dispose()	执行与释放或重置非托管资源关联的应用程序定义的任务。 (继承自 DrawItemEventArgs)
Dispose(Boolean)	为 DrawItem 事件提供数据。 (继承自 DrawItemEventArgs)
DrawBackground()	在 DrawItemEventArgs 构造函数指定的边界范围内用适当的颜色绘制背景。 (继承自 DrawItemEventArgs)
DrawFocusRectangle()	在 DrawItemEventArgs 构造函数指定的边界范围内绘制聚焦框。 (继承自 DrawItemEventArgs)
Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

适用于

StatusBarDrawItemEventArgs 类

定义

示例

注解

构造函数

属性

方法

适用于

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