Control.PerformLayout Méthode
Définition
Force le contrôle à appliquer la logique de présentation aux contrôles enfants.Forces the control to apply layout logic to child controls.
Surcharges
PerformLayout() |
Force le contrôle à appliquer la logique de présentation à tous ses contrôles enfants.Forces the control to apply layout logic to all its child controls. |
PerformLayout(Control, String) |
Force le contrôle à appliquer la logique de présentation à tous ses contrôles enfants.Forces the control to apply layout logic to all its child controls. |
PerformLayout()
Force le contrôle à appliquer la logique de présentation à tous ses contrôles enfants.Forces the control to apply layout logic to all its child controls.
public:
void PerformLayout();
public void PerformLayout ();
member this.PerformLayout : unit -> unit
Public Sub PerformLayout ()
Exemples
L'exemple de code suivant illustre l'utilisation de la méthode PerformLayout.The following code example demonstrates how to use the PerformLayout method. Il montre également comment l’événement Layout est déclenché.It also demonstrates ways in which the Layout event is raised. Dans cet exemple, le gestionnaire d’événements Click
pour Button1
appelle explicitement PerformLayout.In this example, the Click
event handler for Button1
explicitly calls PerformLayout. Le gestionnaire d’événements Click
pour Button2
appelle implicitement PerformLayout.The Click
event handler for Button2
implicitly calls PerformLayout. PerformLayout est également appelé lorsque le formulaire est chargé.PerformLayout is also called when the form is loaded. Button3
retourne le contrôle à l’État dans lequel il se trouvait lorsqu’il était chargé.Button3
returns the control to the state it was in when loaded. Dans chaque cas, l’événement Layout est déclenché.In each case, the Layout event is raised.
Il s’agit d’un exemple complet.This is a complete example. Pour exécuter l’exemple, collez le code suivant dans un formulaire vide.To run the example, paste the following code in a blank form.
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public ref class LayoutControl: public System::Windows::Forms::UserControl
{
public private:
System::Windows::Forms::TextBox^ TextBox1;
public:
LayoutControl()
: UserControl()
{
InitializeComponent();
}
private:
void InitializeComponent()
{
this->TextBox1 = gcnew System::Windows::Forms::TextBox;
this->SuspendLayout();
this->TextBox1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
this->TextBox1->Name = "TextBox1";
this->TextBox1->TabIndex = 0;
this->BackColor = System::Drawing::SystemColors::ControlDark;
this->Controls->Add( this->TextBox1 );
this->Name = "LayoutControl";
this->ResumeLayout( false );
this->Layout += gcnew LayoutEventHandler( this, &LayoutControl::LayoutControl_Layout );
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
void LayoutControl_Layout( Object^ /*sender*/, System::Windows::Forms::LayoutEventArgs^ e )
{
if ( e->AffectedProperty != nullptr )
{
if ( e->AffectedProperty->Equals( "Bounds" ) )
{
TextBox1->Left = (this->Width - TextBox1->Width) / 2;
TextBox1->Top = (this->Height - TextBox1->Height) / 2;
}
}
else
{
this->Size = System::Drawing::Size( 150, 160 );
TextBox1->Location = System::Drawing::Point( 16, 24 );
}
TextBox1->Text = String::Format( "Left = {0} Top = {1}", TextBox1->Left, TextBox1->Top );
}
};
public ref class LayoutForm: public System::Windows::Forms::Form
{
public:
LayoutForm()
: Form()
{
InitializeComponent();
}
public private:
System::Windows::Forms::Button^ Button1;
System::Windows::Forms::Button^ Button2;
LayoutControl^ LayoutControl1;
System::Windows::Forms::Button^ Button3;
private:
void InitializeComponent()
{
this->Button1 = gcnew System::Windows::Forms::Button;
this->Button2 = gcnew System::Windows::Forms::Button;
this->Button3 = gcnew System::Windows::Forms::Button;
this->LayoutControl1 = gcnew LayoutControl;
this->SuspendLayout();
this->Button1->Location = System::Drawing::Point( 16, 16 );
this->Button1->Name = "Button1";
this->Button1->Size = System::Drawing::Size( 120, 32 );
this->Button1->TabIndex = 0;
this->Button1->Text = "Center textbox on control";
this->Button2->Location = System::Drawing::Point( 152, 16 );
this->Button2->Name = "Button2";
this->Button2->Size = System::Drawing::Size( 104, 32 );
this->Button2->TabIndex = 3;
this->Button2->Text = "Shrink user control";
this->Button3->Location = System::Drawing::Point( 96, 232 );
this->Button3->Name = "Button3";
this->Button3->TabIndex = 5;
this->Button3->Text = "Reset";
this->LayoutControl1->BackColor = System::Drawing::SystemColors::ControlDark;
this->LayoutControl1->Location = System::Drawing::Point( 72, 64 );
this->LayoutControl1->Name = "LayoutControl1";
this->LayoutControl1->Size = System::Drawing::Size( 150, 160 );
this->LayoutControl1->TabIndex = 6;
this->ClientSize = System::Drawing::Size( 292, 266 );
this->Controls->Add( this->Button3 );
this->Controls->Add( this->Button2 );
this->Controls->Add( this->Button1 );
this->Controls->Add( this->LayoutControl1 );
this->Name = "Form1";
this->Text = "Form1";
this->ResumeLayout( false );
this->Button1->Click += gcnew System::EventHandler( this,&LayoutForm::Button1_Click );
this->Button2->Click += gcnew System::EventHandler( this,&LayoutForm::Button2_Click );
this->Button3->Click += gcnew System::EventHandler( this,&LayoutForm::Button3_Click );
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout( LayoutControl1, "Bounds" );
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->Size = System::Drawing::Size( 100, 100 );
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
void Button3_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout();
}
};
[System::STAThread]
int main()
{
Application::Run( gcnew LayoutForm );
}
using System.Windows.Forms;
using System.Drawing;
public class LayoutForm:
System.Windows.Forms.Form
{
public LayoutForm() : base()
{
InitializeComponent();
}
internal System.Windows.Forms.Button Button1;
internal System.Windows.Forms.Button Button2;
internal LayoutControl LayoutControl1;
internal System.Windows.Forms.Button Button3;
private void InitializeComponent()
{
this.Button1 = new System.Windows.Forms.Button();
this.Button2 = new System.Windows.Forms.Button();
this.Button3 = new System.Windows.Forms.Button();
this.LayoutControl1 = new LayoutControl();
this.SuspendLayout();
this.Button1.Location = new System.Drawing.Point(16, 16);
this.Button1.Name = "Button1";
this.Button1.Size = new System.Drawing.Size(120, 32);
this.Button1.TabIndex = 0;
this.Button1.Text = "Center textbox on control";
this.Button2.Location = new System.Drawing.Point(152, 16);
this.Button2.Name = "Button2";
this.Button2.Size = new System.Drawing.Size(104, 32);
this.Button2.TabIndex = 3;
this.Button2.Text = "Shrink user control";
this.Button3.Location = new System.Drawing.Point(96, 232);
this.Button3.Name = "Button3";
this.Button3.TabIndex = 5;
this.Button3.Text = "Reset";
this.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark;
this.LayoutControl1.Location = new System.Drawing.Point(72, 64);
this.LayoutControl1.Name = "LayoutControl1";
this.LayoutControl1.Size = new System.Drawing.Size(150, 160);
this.LayoutControl1.TabIndex = 6;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.Button3);
this.Controls.Add(this.Button2);
this.Controls.Add(this.Button1);
this.Controls.Add(this.LayoutControl1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.Button1.Click += new System.EventHandler(Button1_Click);
this.Button2.Click += new System.EventHandler(Button2_Click);
this.Button3.Click += new System.EventHandler(Button3_Click);
}
[System.STAThread]
public static void Main()
{
Application.Run(new LayoutForm());
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
private void Button1_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout(LayoutControl1, "Bounds");
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
private void Button2_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.Size = new System.Drawing.Size(100, 100);
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
private void Button3_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout();
}
}
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public class LayoutControl:
System.Windows.Forms.UserControl
{
internal System.Windows.Forms.TextBox TextBox1;
public LayoutControl() : base()
{
InitializeComponent();
}
private void InitializeComponent()
{
this.TextBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.TextBox1.Name = "TextBox1";
this.TextBox1.TabIndex = 0;
this.BackColor = System.Drawing.SystemColors.ControlDark;
this.Controls.Add(this.TextBox1);
this.Name = "LayoutControl";
this.ResumeLayout(false);
this.Layout += new LayoutEventHandler(LayoutControl_Layout);
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
private void LayoutControl_Layout(object sender,
System.Windows.Forms.LayoutEventArgs e)
{
if (e.AffectedProperty != null)
{
if (e.AffectedProperty.Equals("Bounds"))
{
TextBox1.Left = (this.Width-TextBox1.Width)/2;
TextBox1.Top = (this.Height-TextBox1.Height)/2;
}
}
else
{
this.Size = new System.Drawing.Size(150, 160);
TextBox1.Location = new System.Drawing.Point(16, 24);
}
TextBox1.Text = "Left = "+TextBox1.Left+" Top = "+TextBox1.Top;
}
}
Imports System.Windows.Forms
Imports System.Drawing
Public Class LayoutForm
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents LayoutControl1 As LayoutControl
Friend WithEvents Button3 As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Button3 = New System.Windows.Forms.Button
Me.LayoutControl1 = New LayoutControl
Me.SuspendLayout()
Me.Button1.Location = New System.Drawing.Point(16, 16)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 32)
Me.Button1.TabIndex = 0
Me.Button1.Text = "Center textbox on control"
Me.Button2.Location = New System.Drawing.Point(152, 16)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(104, 32)
Me.Button2.TabIndex = 3
Me.Button2.Text = "Shrink user control"
Me.Button3.Location = New System.Drawing.Point(96, 232)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 5
Me.Button3.Text = "Reset"
Me.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark
Me.LayoutControl1.Location = New System.Drawing.Point(72, 64)
Me.LayoutControl1.Name = "LayoutControl1"
Me.LayoutControl1.Size = New System.Drawing.Size(150, 160)
Me.LayoutControl1.TabIndex = 6
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.LayoutControl1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<System.STAThread()> Shared Sub Main()
Application.Run(New LayoutForm)
End Sub
' This method explicitly calls raises the layout event on
' LayoutControl1, changing the Bounds property.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
LayoutControl1.PerformLayout(LayoutControl1, "Bounds")
End Sub
' This resize of LayoutControl1 implicitly triggers the layout event.
' Changing the size of the control affects its Bounds property.
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
LayoutControl1.Size = New System.Drawing.Size(100, 100)
End Sub
' This method explicitly calls PerformLayout with no parameters,
' which raises the Layout event with the LayoutEventArgs properties
' equal to Nothing.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
LayoutControl1.PerformLayout()
End Sub
End Class
'This custom control has the Layout event implented so that when
'PerformLayout(AffectedControl, AffectedProperty) is called on the control,
'where AffectedProperty equals "Bounds" the textbox is centered on the control.
Public Class LayoutControl
Inherits System.Windows.Forms.UserControl
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Private Sub InitializeComponent()
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
Me.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 0
Me.BackColor = System.Drawing.SystemColors.ControlDark
Me.Controls.Add(Me.TextBox1)
Me.Name = "LayoutControl"
Me.ResumeLayout(False)
End Sub
'This method is called when the Layout event is fired. This happens by during the initial load,
'by calling PerformLayout or by resizing, adding or removing controls or other actions that
'affect how the control is laid out. This method checks the value of e.AffectedProperty
'and changes the look of the control accordingly.
Private Sub LayoutControl_Layout(ByVal sender As Object, ByVal e As System.Windows.Forms.LayoutEventArgs) Handles MyBase.Layout
If e.AffectedProperty IsNot Nothing Then
If e.AffectedProperty.Equals("Bounds") Then
TextBox1.Left = (Me.Width - TextBox1.Width) / 2
TextBox1.Top = (Me.Height - TextBox1.Height) / 2
End If
Else
Me.Size = New System.Drawing.Size(150, 160)
TextBox1.Location = New System.Drawing.Point(16, 24)
End If
TextBox1.Text = "Left = " & TextBox1.Left & " Top = " & TextBox1.Top
End Sub
End Class
Remarques
Si la méthode SuspendLayout a été appelée avant d’appeler la méthode PerformLayout, l’événement Layout est supprimé.If the SuspendLayout method was called before calling the PerformLayout method, the Layout event is suppressed.
Les propriétés AffectedControl et AffectedProperty de la LayoutEventArgs créées ont la valeur null
Si aucune valeur n’a été fournie lors de l’appel de la méthode PerformLayout.The AffectedControl and AffectedProperty properties of the LayoutEventArgs created are set to null
if no values were provided when the PerformLayout method was called.
Voir aussi
PerformLayout(Control, String)
Force le contrôle à appliquer la logique de présentation à tous ses contrôles enfants.Forces the control to apply layout logic to all its child controls.
public:
void PerformLayout(System::Windows::Forms::Control ^ affectedControl, System::String ^ affectedProperty);
public void PerformLayout (System.Windows.Forms.Control affectedControl, string affectedProperty);
member this.PerformLayout : System.Windows.Forms.Control * string -> unit
Public Sub PerformLayout (affectedControl As Control, affectedProperty As String)
Paramètres
- affectedControl
- Control
Control qui représente le contrôle le plus récemment modifié.A Control that represents the most recently changed control.
- affectedProperty
- String
Nom de la propriété la plus récemment modifiée sur le contrôle.The name of the most recently changed property on the control.
Exemples
L'exemple de code suivant illustre l'utilisation de la méthode PerformLayout.The following code example demonstrates how to use the PerformLayout method. Il montre également comment l’événement Layout est déclenché.It also demonstrates ways in which the Layout event is raised. Dans cet exemple, le gestionnaire d’événements Click
pour Button1
appelle explicitement PerformLayout.In this example, the Click
event handler for Button1
explicitly calls PerformLayout. Le gestionnaire d’événements Click
pour Button2
appelle implicitement PerformLayout.The Click
event handler for Button2
implicitly calls PerformLayout. PerformLayout est également appelé lorsque le formulaire est chargé.PerformLayout is also called when the form is loaded. Button3
retourne le contrôle à l’État dans lequel il se trouvait lorsqu’il était chargé.Button3
returns the control to the state it was in when loaded. Dans chaque cas, l’événement Layout est déclenché.In each case, the Layout event is raised.
Il s’agit d’un exemple complet.This is a complete example. Pour exécuter l’exemple, collez le code suivant dans un formulaire vide.To run the example, paste the following code in a blank form.
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public ref class LayoutControl: public System::Windows::Forms::UserControl
{
public private:
System::Windows::Forms::TextBox^ TextBox1;
public:
LayoutControl()
: UserControl()
{
InitializeComponent();
}
private:
void InitializeComponent()
{
this->TextBox1 = gcnew System::Windows::Forms::TextBox;
this->SuspendLayout();
this->TextBox1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
this->TextBox1->Name = "TextBox1";
this->TextBox1->TabIndex = 0;
this->BackColor = System::Drawing::SystemColors::ControlDark;
this->Controls->Add( this->TextBox1 );
this->Name = "LayoutControl";
this->ResumeLayout( false );
this->Layout += gcnew LayoutEventHandler( this, &LayoutControl::LayoutControl_Layout );
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
void LayoutControl_Layout( Object^ /*sender*/, System::Windows::Forms::LayoutEventArgs^ e )
{
if ( e->AffectedProperty != nullptr )
{
if ( e->AffectedProperty->Equals( "Bounds" ) )
{
TextBox1->Left = (this->Width - TextBox1->Width) / 2;
TextBox1->Top = (this->Height - TextBox1->Height) / 2;
}
}
else
{
this->Size = System::Drawing::Size( 150, 160 );
TextBox1->Location = System::Drawing::Point( 16, 24 );
}
TextBox1->Text = String::Format( "Left = {0} Top = {1}", TextBox1->Left, TextBox1->Top );
}
};
public ref class LayoutForm: public System::Windows::Forms::Form
{
public:
LayoutForm()
: Form()
{
InitializeComponent();
}
public private:
System::Windows::Forms::Button^ Button1;
System::Windows::Forms::Button^ Button2;
LayoutControl^ LayoutControl1;
System::Windows::Forms::Button^ Button3;
private:
void InitializeComponent()
{
this->Button1 = gcnew System::Windows::Forms::Button;
this->Button2 = gcnew System::Windows::Forms::Button;
this->Button3 = gcnew System::Windows::Forms::Button;
this->LayoutControl1 = gcnew LayoutControl;
this->SuspendLayout();
this->Button1->Location = System::Drawing::Point( 16, 16 );
this->Button1->Name = "Button1";
this->Button1->Size = System::Drawing::Size( 120, 32 );
this->Button1->TabIndex = 0;
this->Button1->Text = "Center textbox on control";
this->Button2->Location = System::Drawing::Point( 152, 16 );
this->Button2->Name = "Button2";
this->Button2->Size = System::Drawing::Size( 104, 32 );
this->Button2->TabIndex = 3;
this->Button2->Text = "Shrink user control";
this->Button3->Location = System::Drawing::Point( 96, 232 );
this->Button3->Name = "Button3";
this->Button3->TabIndex = 5;
this->Button3->Text = "Reset";
this->LayoutControl1->BackColor = System::Drawing::SystemColors::ControlDark;
this->LayoutControl1->Location = System::Drawing::Point( 72, 64 );
this->LayoutControl1->Name = "LayoutControl1";
this->LayoutControl1->Size = System::Drawing::Size( 150, 160 );
this->LayoutControl1->TabIndex = 6;
this->ClientSize = System::Drawing::Size( 292, 266 );
this->Controls->Add( this->Button3 );
this->Controls->Add( this->Button2 );
this->Controls->Add( this->Button1 );
this->Controls->Add( this->LayoutControl1 );
this->Name = "Form1";
this->Text = "Form1";
this->ResumeLayout( false );
this->Button1->Click += gcnew System::EventHandler( this,&LayoutForm::Button1_Click );
this->Button2->Click += gcnew System::EventHandler( this,&LayoutForm::Button2_Click );
this->Button3->Click += gcnew System::EventHandler( this,&LayoutForm::Button3_Click );
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout( LayoutControl1, "Bounds" );
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->Size = System::Drawing::Size( 100, 100 );
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
void Button3_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout();
}
};
[System::STAThread]
int main()
{
Application::Run( gcnew LayoutForm );
}
using System.Windows.Forms;
using System.Drawing;
public class LayoutForm:
System.Windows.Forms.Form
{
public LayoutForm() : base()
{
InitializeComponent();
}
internal System.Windows.Forms.Button Button1;
internal System.Windows.Forms.Button Button2;
internal LayoutControl LayoutControl1;
internal System.Windows.Forms.Button Button3;
private void InitializeComponent()
{
this.Button1 = new System.Windows.Forms.Button();
this.Button2 = new System.Windows.Forms.Button();
this.Button3 = new System.Windows.Forms.Button();
this.LayoutControl1 = new LayoutControl();
this.SuspendLayout();
this.Button1.Location = new System.Drawing.Point(16, 16);
this.Button1.Name = "Button1";
this.Button1.Size = new System.Drawing.Size(120, 32);
this.Button1.TabIndex = 0;
this.Button1.Text = "Center textbox on control";
this.Button2.Location = new System.Drawing.Point(152, 16);
this.Button2.Name = "Button2";
this.Button2.Size = new System.Drawing.Size(104, 32);
this.Button2.TabIndex = 3;
this.Button2.Text = "Shrink user control";
this.Button3.Location = new System.Drawing.Point(96, 232);
this.Button3.Name = "Button3";
this.Button3.TabIndex = 5;
this.Button3.Text = "Reset";
this.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark;
this.LayoutControl1.Location = new System.Drawing.Point(72, 64);
this.LayoutControl1.Name = "LayoutControl1";
this.LayoutControl1.Size = new System.Drawing.Size(150, 160);
this.LayoutControl1.TabIndex = 6;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.Button3);
this.Controls.Add(this.Button2);
this.Controls.Add(this.Button1);
this.Controls.Add(this.LayoutControl1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.Button1.Click += new System.EventHandler(Button1_Click);
this.Button2.Click += new System.EventHandler(Button2_Click);
this.Button3.Click += new System.EventHandler(Button3_Click);
}
[System.STAThread]
public static void Main()
{
Application.Run(new LayoutForm());
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
private void Button1_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout(LayoutControl1, "Bounds");
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
private void Button2_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.Size = new System.Drawing.Size(100, 100);
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
private void Button3_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout();
}
}
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public class LayoutControl:
System.Windows.Forms.UserControl
{
internal System.Windows.Forms.TextBox TextBox1;
public LayoutControl() : base()
{
InitializeComponent();
}
private void InitializeComponent()
{
this.TextBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.TextBox1.Name = "TextBox1";
this.TextBox1.TabIndex = 0;
this.BackColor = System.Drawing.SystemColors.ControlDark;
this.Controls.Add(this.TextBox1);
this.Name = "LayoutControl";
this.ResumeLayout(false);
this.Layout += new LayoutEventHandler(LayoutControl_Layout);
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
private void LayoutControl_Layout(object sender,
System.Windows.Forms.LayoutEventArgs e)
{
if (e.AffectedProperty != null)
{
if (e.AffectedProperty.Equals("Bounds"))
{
TextBox1.Left = (this.Width-TextBox1.Width)/2;
TextBox1.Top = (this.Height-TextBox1.Height)/2;
}
}
else
{
this.Size = new System.Drawing.Size(150, 160);
TextBox1.Location = new System.Drawing.Point(16, 24);
}
TextBox1.Text = "Left = "+TextBox1.Left+" Top = "+TextBox1.Top;
}
}
Imports System.Windows.Forms
Imports System.Drawing
Public Class LayoutForm
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents LayoutControl1 As LayoutControl
Friend WithEvents Button3 As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Button3 = New System.Windows.Forms.Button
Me.LayoutControl1 = New LayoutControl
Me.SuspendLayout()
Me.Button1.Location = New System.Drawing.Point(16, 16)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 32)
Me.Button1.TabIndex = 0
Me.Button1.Text = "Center textbox on control"
Me.Button2.Location = New System.Drawing.Point(152, 16)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(104, 32)
Me.Button2.TabIndex = 3
Me.Button2.Text = "Shrink user control"
Me.Button3.Location = New System.Drawing.Point(96, 232)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 5
Me.Button3.Text = "Reset"
Me.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark
Me.LayoutControl1.Location = New System.Drawing.Point(72, 64)
Me.LayoutControl1.Name = "LayoutControl1"
Me.LayoutControl1.Size = New System.Drawing.Size(150, 160)
Me.LayoutControl1.TabIndex = 6
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.LayoutControl1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<System.STAThread()> Shared Sub Main()
Application.Run(New LayoutForm)
End Sub
' This method explicitly calls raises the layout event on
' LayoutControl1, changing the Bounds property.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
LayoutControl1.PerformLayout(LayoutControl1, "Bounds")
End Sub
' This resize of LayoutControl1 implicitly triggers the layout event.
' Changing the size of the control affects its Bounds property.
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
LayoutControl1.Size = New System.Drawing.Size(100, 100)
End Sub
' This method explicitly calls PerformLayout with no parameters,
' which raises the Layout event with the LayoutEventArgs properties
' equal to Nothing.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
LayoutControl1.PerformLayout()
End Sub
End Class
'This custom control has the Layout event implented so that when
'PerformLayout(AffectedControl, AffectedProperty) is called on the control,
'where AffectedProperty equals "Bounds" the textbox is centered on the control.
Public Class LayoutControl
Inherits System.Windows.Forms.UserControl
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Private Sub InitializeComponent()
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
Me.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 0
Me.BackColor = System.Drawing.SystemColors.ControlDark
Me.Controls.Add(Me.TextBox1)
Me.Name = "LayoutControl"
Me.ResumeLayout(False)
End Sub
'This method is called when the Layout event is fired. This happens by during the initial load,
'by calling PerformLayout or by resizing, adding or removing controls or other actions that
'affect how the control is laid out. This method checks the value of e.AffectedProperty
'and changes the look of the control accordingly.
Private Sub LayoutControl_Layout(ByVal sender As Object, ByVal e As System.Windows.Forms.LayoutEventArgs) Handles MyBase.Layout
If e.AffectedProperty IsNot Nothing Then
If e.AffectedProperty.Equals("Bounds") Then
TextBox1.Left = (Me.Width - TextBox1.Width) / 2
TextBox1.Top = (Me.Height - TextBox1.Height) / 2
End If
Else
Me.Size = New System.Drawing.Size(150, 160)
TextBox1.Location = New System.Drawing.Point(16, 24)
End If
TextBox1.Text = "Left = " & TextBox1.Left & " Top = " & TextBox1.Top
End Sub
End Class
Remarques
Si la méthode SuspendLayout a été appelée avant d’appeler la méthode PerformLayout, l’événement Layout est supprimé.If the SuspendLayout method was called before calling the PerformLayout method, the Layout event is suppressed.
Les paramètres affectedControl
et affectedProperty
peuvent tous deux avoir la valeur null
.The affectedControl
and affectedProperty
parameters can both be set to null
. En procédant ainsi, les propriétés AffectedControl et AffectedProperty de la LayoutEventArgs créées sont définies sur null
.Doing so causes the AffectedControl and AffectedProperty properties of the LayoutEventArgs created to be set to null
.