MeasureItemEventArgs 클래스
ListBox, ComboBox, CheckedListBox 및 MenuItem 컨트롤의 MeasureItem 이벤트에 대한 데이터를 제공합니다.
네임스페이스: System.Windows.Forms
어셈블리: System.Windows.Forms(system.windows.forms.dll)
구문
‘선언
Public Class MeasureItemEventArgs
Inherits EventArgs
‘사용 방법
Dim instance As MeasureItemEventArgs
public class MeasureItemEventArgs : EventArgs
public ref class MeasureItemEventArgs : public EventArgs
public class MeasureItemEventArgs extends EventArgs
public class MeasureItemEventArgs extends EventArgs
설명
이 이벤트는 ListBox, ComboBox, CheckedListBox 또는 MenuItem의 OwnerDraw 속성이 true로 설정될 때 보내집니다. 이 이벤트는 항목의 크기 지정 방법을 그리기 함수에 알리는 데 사용됩니다.
이벤트 모델에 대한 자세한 내용은 이벤트 및 대리자를 참조하십시오.
예제
Public Class Form1
Inherits System.Windows.Forms.Form
Private WithEvents listBox1 As System.Windows.Forms.ListBox
Private components As System.ComponentModel.Container = Nothing
Private FontSize As Single = 12.0F
'
' This sample displays a ListBox that contains a list of all the fonts
' installed on the system and draws each item in its respective font.
'
Public Sub New()
InitializeComponent()
' Populate control with the fonts installed on the system.
Dim families As FontFamily() = FontFamily.Families
Dim family As FontFamily
For Each family In families
Dim style As FontStyle = FontStyle.Regular
' Monotype Corsiva is only available in italic
If family.Name = "Monotype Corsiva" Then
style = style Or FontStyle.Italic
End If
listBox1.Items.Add(New ListBoxFontItem(New Font(family.Name, FontSize, style, GraphicsUnit.Point)))
Next family
End Sub
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
If Not (foreColorBrush Is Nothing) Then
foreColorBrush.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
Private Sub InitializeComponent()
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.SuspendLayout()
'
' listBox1
'
Me.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable
Me.listBox1.Location = New System.Drawing.Point(16, 48)
Me.listBox1.Name = "listBox1"
Me.listBox1.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended
Me.listBox1.Size = New System.Drawing.Size(256, 134)
Me.listBox1.TabIndex = 0
'
' Form1
'
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.listBox1})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<STAThread()> Shared Sub Main()
Application.Run(New Form1())
End Sub
Private Sub listBox1_MeasureItem(ByVal sender As Object, ByVal e As System.Windows.Forms.MeasureItemEventArgs) Handles listBox1.MeasureItem
Dim font As Font = CType(listBox1.Items(e.Index), ListBoxFontItem).Font
Dim stringSize As SizeF = e.Graphics.MeasureString(font.Name, font)
' Set the height and width of the item
e.ItemHeight = CInt(stringSize.Height)
e.ItemWidth = CInt(stringSize.Width)
End Sub
' For efficiency, cache the brush used for drawing.
Private foreColorBrush As SolidBrush
Private Sub listBox1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles listBox1.DrawItem
Dim brush As Brush
' Create the brush using the ForeColor specified by the DrawItemEventArgs
If foreColorBrush Is Nothing Then
foreColorBrush = New SolidBrush(e.ForeColor)
Else
If Not foreColorBrush.Color.Equals(e.ForeColor) Then
' The control's ForeColor has changed, so dispose of the cached brush and
' create a new one.
foreColorBrush.Dispose()
foreColorBrush = New SolidBrush(e.ForeColor)
End If
End If
' Select the appropriate brush depending on if the item is selected.
' Since State can be a combinateion (bit-flag) of enum values, you can't use
' "==" to compare them.
If (e.State And DrawItemState.Selected) = DrawItemState.Selected Then
brush = SystemBrushes.HighlightText
Else
brush = foreColorBrush
End If
' Perform the painting.
Dim font As Font = CType(listBox1.Items(e.Index), ListBoxFontItem).Font
e.DrawBackground()
e.Graphics.DrawString(font.Name, font, brush, e.Bounds.X, e.Bounds.Y)
e.DrawFocusRectangle()
End Sub
'
' A wrapper class for use with storing Fonts in a ListBox. Since ListBox uses the
' ToString() of its items for the text it displays, this class is needed to return
' the name of the font, rather than its ToString() value.
'
Public Class ListBoxFontItem
Public Font As Font
Public Sub New(ByVal f As Font)
Font = f
End Sub
Public Overrides Function ToString() As String
Return Font.Name
End Function
End Class
End Class
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.ComponentModel.Container components = null;
protected override void Dispose(bool disposing)
{
if( disposing )
{
if ( components != null )
components.Dispose();
if ( foreColorBrush != null )
foreColorBrush.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
this.listBox1.Location = new System.Drawing.Point(16, 48);
this.listBox1.Name = "listBox1";
this.listBox1.SelectionMode = System.Windows.Forms.SelectionMode.MultiExtended;
this.listBox1.Size = new System.Drawing.Size(256, 134);
this.listBox1.TabIndex = 0;
this.listBox1.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.listBox1_MeasureItem);
this.listBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.listBox1_DrawItem);
//
// Form1
//
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.listBox1});
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void listBox1_MeasureItem(object sender, System.Windows.Forms.MeasureItemEventArgs e)
{
Font font = ((ListBoxFontItem)listBox1.Items[e.Index]).Font;
SizeF stringSize = e.Graphics.MeasureString(font.Name, font);
// Set the height and width of the item
e.ItemHeight = (int)stringSize.Height;
e.ItemWidth = (int)stringSize.Width;
}
// For efficiency, cache the brush to use for drawing.
private SolidBrush foreColorBrush;
private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
Brush brush;
// Create the brush using the ForeColor specified by the DrawItemEventArgs
if ( foreColorBrush == null )
foreColorBrush = new SolidBrush(e.ForeColor);
else if ( foreColorBrush.Color != e.ForeColor )
{
// The control's ForeColor has changed, so dispose of the cached brush and
// create a new one.
foreColorBrush.Dispose();
foreColorBrush = new SolidBrush(e.ForeColor);
}
// Select the appropriate brush depending on if the item is selected.
// Since State can be a combinateion (bit-flag) of enum values, you can't use
// "==" to compare them.
if ( (e.State & DrawItemState.Selected) == DrawItemState.Selected )
brush = SystemBrushes.HighlightText;
else
brush = foreColorBrush;
// Perform the painting.
Font font = ((ListBoxFontItem)listBox1.Items[e.Index]).Font;
e.DrawBackground();
e.Graphics.DrawString(font.Name, font, brush, e.Bounds);
e.DrawFocusRectangle();
}
/// <summary>
/// A wrapper class for use with storing Fonts in a ListBox. Since ListBox uses the
/// ToString() of its items for the text it displays, this class is needed to return
/// the name of the font, rather than its ToString() value.
/// </summary>
public class ListBoxFontItem
{
public Font Font;
public ListBoxFontItem(Font f)
{
Font = f;
}
public override string ToString()
{
return Font.Name;
}
}
}
public ref class Form1: public System::Windows::Forms::Form
{
private:
System::Windows::Forms::ListBox^ listBox1;
System::ComponentModel::Container^ components;
public:
~Form1()
{
if ( components != nullptr )
{
delete components;
}
}
private:
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent()
{
this->listBox1 = gcnew System::Windows::Forms::ListBox;
this->SuspendLayout();
//
// listBox1
//
this->listBox1->DrawMode = System::Windows::Forms::DrawMode::OwnerDrawVariable;
this->listBox1->Location = System::Drawing::Point( 16, 48 );
this->listBox1->Name = "listBox1";
this->listBox1->SelectionMode = System::Windows::Forms::SelectionMode::MultiExtended;
this->listBox1->Size = System::Drawing::Size( 256, 134 );
this->listBox1->TabIndex = 0;
this->listBox1->MeasureItem += gcnew System::Windows::Forms::MeasureItemEventHandler( this, &Form1::listBox1_MeasureItem );
this->listBox1->DrawItem += gcnew System::Windows::Forms::DrawItemEventHandler( this, &Form1::listBox1_DrawItem );
//
// Form1
//
this->ClientSize = System::Drawing::Size( 292, 273 );
array<System::Windows::Forms::Control^>^temp0 = {this->listBox1};
this->Controls->AddRange( temp0 );
this->Name = "Form1";
this->Text = "Form1";
this->ResumeLayout( false );
}
void listBox1_MeasureItem( Object^ /*sender*/, MeasureItemEventArgs^ e )
{
System::Drawing::Font^ font = (dynamic_cast<ListBoxFontItem^>(listBox1->Items[ e->Index ]))->Font;
SizeF stringSize = e->Graphics->MeasureString( font->Name, font );
// Set the height and width of the item
e->ItemHeight = (int)stringSize.Height;
e->ItemWidth = (int)stringSize.Width;
}
// For efficiency, cache the brush to use for drawing.
SolidBrush^ foreColorBrush;
void listBox1_DrawItem( Object^ /*sender*/, DrawItemEventArgs^ e )
{
Brush^ brush;
// Create the brush using the ForeColor specified by the DrawItemEventArgs
if ( foreColorBrush == nullptr )
foreColorBrush = gcnew SolidBrush( e->ForeColor );
else
if ( foreColorBrush->Color != e->ForeColor )
{
// The control's ForeColor has changed, so dispose of the cached brush and
// create a new one.
delete foreColorBrush;
foreColorBrush = gcnew SolidBrush( e->ForeColor );
}
// Select the appropriate brush depending on if the item is selected.
// Since State can be a combinateion (bit-flag) of enum values, you can't use
// "==" to compare them.
if ( (e->State & DrawItemState::Selected) == DrawItemState::Selected )
brush = SystemBrushes::HighlightText;
else
brush = foreColorBrush;
// Perform the painting.
System::Drawing::Font^ font = (dynamic_cast<ListBoxFontItem^>(listBox1->Items[ e->Index ]))->Font;
e->DrawBackground();
e->Graphics->DrawString( font->Name, font, brush, e->Bounds );
e->DrawFocusRectangle();
}
public:
/// <summary>
/// A wrapper class for use with storing Fonts in a ListBox. Since ListBox uses the
/// ToString() of its items for the text it displays, this class is needed to return
/// the name of the font, rather than its ToString() value.
/// </summary>
ref class ListBoxFontItem
{
public:
System::Drawing::Font^ Font;
ListBoxFontItem( System::Drawing::Font^ f )
{
Font = f;
}
virtual String^ ToString() override
{
return Font->Name;
}
};
};
[STAThread]
int main()
{
Application::Run( gcnew Form1 );
}
public class Form1 extends System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.ComponentModel.Container components = null;
protected void Dispose(boolean disposing)
{
if (disposing) {
if (components != null) {
components.Dispose();
}
if (foreColorBrush != null) {
foreColorBrush.Dispose();
}
}
super.Dispose(disposing);
} //Dispose
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.set_DrawMode(
System.Windows.Forms.DrawMode.OwnerDrawVariable);
this.listBox1.set_Location(new System.Drawing.Point(16, 48));
this.listBox1.set_Name("listBox1");
this.listBox1.set_SelectionMode(
System.Windows.Forms.SelectionMode.MultiExtended);
this.listBox1.set_Size(new System.Drawing.Size(256, 134));
this.listBox1.set_TabIndex(0);
this.listBox1.add_MeasureItem(
new System.Windows.Forms.MeasureItemEventHandler(
this.listBox1_MeasureItem));
this.listBox1.add_DrawItem(
new System.Windows.Forms.DrawItemEventHandler(
this.listBox1_DrawItem));
//
// Form1
//
this.set_ClientSize(new System.Drawing.Size(292, 273));
this.get_Controls().AddRange(new System.Windows.Forms.Control[]
{ this.listBox1 });
this.set_Name("Form1");
this.set_Text("Form1");
this.ResumeLayout(false);
} //InitializeComponent
#endregion
/** @attribute STAThread()
*/
public static void main(String[] args)
{
Application.Run(new Form1());
} //main
private void listBox1_MeasureItem(Object sender,
System.Windows.Forms.MeasureItemEventArgs e)
{
Font font = ((ListBoxFontItem)listBox1.get_Items().
get_Item(e.get_Index())).font;
SizeF stringSize =
e.get_Graphics().MeasureString(font.get_Name(), font);
// Set the height and width of the item
e.set_ItemHeight((int)stringSize.get_Height());
e.set_ItemWidth((int)stringSize.get_Width());
} //listBox1_MeasureItem
// For efficiency, cache the brush to use for drawing.
private SolidBrush foreColorBrush;
private void listBox1_DrawItem(Object sender,
System.Windows.Forms.DrawItemEventArgs e)
{
Brush brush;
// Create the brush using the ForeColor specified by the
// DrawItemEventArgs
if (foreColorBrush == null) {
foreColorBrush = new SolidBrush(e.get_ForeColor());
}
else {
if (!foreColorBrush.get_Color().Equals(e.get_ForeColor())) {
// The control's ForeColor has changed,
// so dispose of the cached brush and
// create a new one.
foreColorBrush.Dispose();
foreColorBrush = new SolidBrush(e.get_ForeColor());
}
}
// Select the appropriate brush depending on if the item is selected.
// Since State can be a combinateion (bit-flag) of enum values,
// you can't use "==" to compare them.
if ((e.get_State() & DrawItemState.Selected).
Equals(DrawItemState.Selected)) {
brush = SystemBrushes.get_HighlightText();
}
else {
brush = foreColorBrush;
}
// Perform the painting.
Font font = ((ListBoxFontItem)listBox1.get_Items().
get_Item(e.get_Index())).font;
e.DrawBackground();
e.get_Graphics().DrawString(font.get_Name(), font, brush,
new PointF((float)e.get_Bounds().get_X(),
(float)e.get_Bounds().get_Y()));
e.DrawFocusRectangle();
} //listBox1_DrawItem
/// <summary>
/// A wrapper class for use with storing Fonts in a ListBox.
/// Since ListBox uses the ToString() of its items
/// for the text it displays, this class is needed to return
/// the name of the font, rather than its ToString() value.
/// </summary>
public class ListBoxFontItem
{
public Font font;
public ListBoxFontItem(Font f)
{
set_Font(f);
} //ListBoxFontItem
public String ToString()
{
return get_Font().get_Name();
} //ToString
} //ListBoxFontItem
} //Form1
상속 계층 구조
System.Object
System.EventArgs
System.Windows.Forms.MeasureItemEventArgs
스레드로부터의 안전성
이 형식의 모든 public static(Visual Basic의 경우 Shared) 멤버는 스레드로부터 안전합니다. 인터페이스 멤버는 스레드로부터 안전하지 않습니다.
플랫폼
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework에서 모든 플래폼의 모든 버전을 지원하지는 않습니다. 지원되는 버전의 목록은 시스템 요구 사항을 참조하십시오.
버전 정보
.NET Framework
2.0, 1.1, 1.0에서 지원
참고 항목
참조
MeasureItemEventArgs 멤버
System.Windows.Forms 네임스페이스
ListBox 클래스
ComboBox 클래스
CheckedListBox 클래스
MenuItem
MeasureItemEventHandler