SystemInformation.UIEffectsEnabled Propriedade
Definição
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Obtém um valor que indica se os efeitos da interface do usuário estão habilitados ou desabilitados.
public:
static property bool UIEffectsEnabled { bool get(); };public static bool UIEffectsEnabled { get; }member this.UIEffectsEnabled : boolPublic Shared ReadOnly Property UIEffectsEnabled As BooleanValor da propriedade
true se os efeitos da interface do usuário estiverem habilitados; caso contrário, false.
Exemplos
O exemplo de código a SystemInformation seguir lista todas as propriedades da classe em um ListBox e exibe o valor atual da propriedade em um TextBox quando um item de lista selecionado.
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.dll>
using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::Drawing;
using namespace System::Reflection;
using namespace System::Windows::Forms;
public ref class SystemInfoBrowserForm: public System::Windows::Forms::Form
{
private:
System::Windows::Forms::ListBox^ listBox1;
System::Windows::Forms::TextBox^ textBox1;
public:
SystemInfoBrowserForm()
{
this->SuspendLayout();
InitForm();
// Add each property of the SystemInformation class to the list box.
Type^ t = System::Windows::Forms::SystemInformation::typeid;
array<PropertyInfo^>^pi = t->GetProperties();
for ( int i = 0; i < pi->Length; i++ )
listBox1->Items->Add( pi[ i ]->Name );
textBox1->Text = String::Format( "The SystemInformation class has {0} properties.\r\n", pi->Length );
// Configure the list item selected handler for the list box to invoke a
// method that displays the value of each property.
listBox1->SelectedIndexChanged += gcnew EventHandler( this, &SystemInfoBrowserForm::listBox1_SelectedIndexChanged );
this->ResumeLayout( false );
}
private:
void listBox1_SelectedIndexChanged( Object^ /*sender*/, EventArgs^ /*e*/ )
{
// Return if no list item is selected.
if ( listBox1->SelectedIndex == -1 )
return;
// Get the property name from the list item.
String^ propname = listBox1->Text;
if ( propname->Equals( "PowerStatus" ) )
{
// Cycle and display the values of each property of the PowerStatus property.
textBox1->Text = String::Concat( textBox1->Text, "\r\nThe value of the PowerStatus property is:" );
Type^ t = System::Windows::Forms::PowerStatus::typeid;
array<PropertyInfo^>^pi = t->GetProperties();
for ( int i = 0; i < pi->Length; i++ )
{
Object^ propval = pi[ i ]->GetValue( SystemInformation::PowerStatus, nullptr );
textBox1->Text = String::Format( "{0}\r\n PowerStatus.{1} is: {2}", textBox1->Text, pi[ i ]->Name, propval );
}
}
else
{
// Display the value of the selected property of the SystemInformation type.
Type^ t = System::Windows::Forms::SystemInformation::typeid;
array<PropertyInfo^>^pi = t->GetProperties();
PropertyInfo^ prop = nullptr;
for ( int i = 0; i < pi->Length; i++ )
if ( pi[ i ]->Name == propname )
{
prop = pi[ i ];
break;
}
Object^ propval = prop->GetValue( nullptr, nullptr );
textBox1->Text = String::Format( "{0}\r\nThe value of the {1} property is: {2}", textBox1->Text, propname, propval );
}
}
void InitForm()
{
// Initialize the form settings
this->listBox1 = gcnew System::Windows::Forms::ListBox;
this->textBox1 = gcnew System::Windows::Forms::TextBox;
this->listBox1->Anchor = (System::Windows::Forms::AnchorStyles)(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
this->listBox1->Location = System::Drawing::Point( 8, 16 );
this->listBox1->Size = System::Drawing::Size( 172, 496 );
this->listBox1->TabIndex = 0;
this->textBox1->Anchor = (System::Windows::Forms::AnchorStyles)(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
this->textBox1->Location = System::Drawing::Point( 188, 16 );
this->textBox1->Multiline = true;
this->textBox1->ScrollBars = System::Windows::Forms::ScrollBars::Vertical;
this->textBox1->Size = System::Drawing::Size( 420, 496 );
this->textBox1->TabIndex = 1;
this->ClientSize = System::Drawing::Size( 616, 525 );
this->Controls->Add( this->textBox1 );
this->Controls->Add( this->listBox1 );
this->Text = "Select a SystemInformation property to get the value of";
}
};
[STAThread]
int main()
{
Application::Run( gcnew SystemInfoBrowserForm );
}
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms;
namespace SystemInfoBrowser
{
public class SystemInfoBrowserForm : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.TextBox textBox1;
public SystemInfoBrowserForm()
{
this.SuspendLayout();
InitForm();
// Add each property of the SystemInformation class to the list box.
Type t = typeof(System.Windows.Forms.SystemInformation);
PropertyInfo[] pi = t.GetProperties();
for( int i=0; i<pi.Length; i++ )
listBox1.Items.Add( pi[i].Name );
textBox1.Text = "The SystemInformation class has "+pi.Length.ToString()+" properties.\r\n";
// Configure the list item selected handler for the list box to invoke a
// method that displays the value of each property.
listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
this.ResumeLayout(false);
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
// Return if no list item is selected.
if( listBox1.SelectedIndex == -1 ) return;
// Get the property name from the list item.
string propname = listBox1.Text;
if( propname == "PowerStatus" )
{
// Cycle and display the values of each property of the PowerStatus property.
textBox1.Text += "\r\nThe value of the PowerStatus property is:";
Type t = typeof(System.Windows.Forms.PowerStatus);
PropertyInfo[] pi = t.GetProperties();
for( int i=0; i<pi.Length; i++ )
{
object propval = pi[i].GetValue(SystemInformation.PowerStatus, null);
textBox1.Text += "\r\n PowerStatus."+pi[i].Name+" is: "+propval.ToString();
}
}
else
{
// Display the value of the selected property of the SystemInformation type.
Type t = typeof(System.Windows.Forms.SystemInformation);
PropertyInfo[] pi = t.GetProperties();
PropertyInfo prop = null;
for( int i=0; i<pi.Length; i++ )
if( pi[i].Name == propname )
{
prop = pi[i];
break;
}
object propval = prop.GetValue(null, null);
textBox1.Text += "\r\nThe value of the "+propname+" property is: "+propval.ToString();
}
}
private void InitForm()
{
// Initialize the form settings
this.listBox1 = new System.Windows.Forms.ListBox();
this.textBox1 = new System.Windows.Forms.TextBox();
this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right)));
this.listBox1.Location = new System.Drawing.Point(8, 16);
this.listBox1.Size = new System.Drawing.Size(172, 496);
this.listBox1.TabIndex = 0;
this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Right)));
this.textBox1.Location = new System.Drawing.Point(188, 16);
this.textBox1.Multiline = true;
this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
this.textBox1.Size = new System.Drawing.Size(420, 496);
this.textBox1.TabIndex = 1;
this.ClientSize = new System.Drawing.Size(616, 525);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.listBox1);
this.Text = "Select a SystemInformation property to get the value of";
}
[STAThread]
static void Main()
{
Application.Run(new SystemInfoBrowserForm());
}
}
}
Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing
Imports System.Reflection
Imports System.Windows.Forms
Public Class SystemInfoBrowserForm
Inherits System.Windows.Forms.Form
Private listBox1 As System.Windows.Forms.ListBox
Private textBox1 As System.Windows.Forms.TextBox
Public Sub New()
Me.SuspendLayout()
InitForm()
' Add each property of the SystemInformation class to the list box.
Dim t As Type = GetType(System.Windows.Forms.SystemInformation)
Dim pi As PropertyInfo() = t.GetProperties()
Dim i As Integer
For i = 0 To pi.Length - 1
listBox1.Items.Add(pi(i).Name)
Next i
textBox1.Text = "The SystemInformation class has " + pi.Length.ToString() + " properties." + ControlChars.CrLf
' Configure the list item selected handler for the list box to invoke a
' method that displays the value of each property.
AddHandler listBox1.SelectedIndexChanged, AddressOf listBox1_SelectedIndexChanged
Me.ResumeLayout(False)
End Sub
Private Sub listBox1_SelectedIndexChanged(sender As Object, e As EventArgs)
' Return if no list item is selected.
If listBox1.SelectedIndex = - 1 Then
Return
End If
' Get the property name from the list item.
Dim propname As String = listBox1.Text
If propname = "PowerStatus" Then
' Cycle and display the values of each property of the PowerStatus property.
textBox1.Text += ControlChars.CrLf + "The value of the PowerStatus property is:"
Dim t As Type = GetType(System.Windows.Forms.PowerStatus)
Dim pi As PropertyInfo() = t.GetProperties()
Dim i As Integer
For i = 0 To pi.Length - 1
Dim propval As Object = pi(i).GetValue(SystemInformation.PowerStatus, Nothing)
textBox1.Text += ControlChars.CrLf + " PowerStatus." + pi(i).Name + " is: " + propval.ToString()
Next i
Else
' Display the value of the selected property of the SystemInformation type.
Dim t As Type = GetType(System.Windows.Forms.SystemInformation)
Dim pi As PropertyInfo() = t.GetProperties()
Dim prop As PropertyInfo = Nothing
Dim i As Integer
For i = 0 To pi.Length - 1
If pi(i).Name = propname Then
prop = pi(i)
Exit For
End If
Next i
Dim propval As Object = prop.GetValue(Nothing, Nothing)
textBox1.Text += ControlChars.CrLf + "The value of the " + propname + " property is: " + propval.ToString()
End If
End Sub
Private Sub InitForm()
' Initialize the form settings
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.textBox1 = New System.Windows.Forms.TextBox()
Me.listBox1.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
Me.listBox1.Location = New System.Drawing.Point(8, 16)
Me.listBox1.Size = New System.Drawing.Size(172, 496)
Me.listBox1.TabIndex = 0
Me.textBox1.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
Me.textBox1.Location = New System.Drawing.Point(188, 16)
Me.textBox1.Multiline = True
Me.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
Me.textBox1.Size = New System.Drawing.Size(420, 496)
Me.textBox1.TabIndex = 1
Me.ClientSize = New System.Drawing.Size(616, 525)
Me.Controls.Add(Me.textBox1)
Me.Controls.Add(Me.listBox1)
Me.Text = "Select a SystemInformation property to get the value of"
End Sub
<STAThread()> _
Shared Sub Main()
Application.Run(New SystemInfoBrowserForm())
End Sub
End Class
Comentários
Os efeitos da interface do usuário incluem animação, desbotamento, acompanhamento frequente e rolagem suave de controles do sistema e desenho de uma sombra sob o cursor do mouse. Quando os efeitos da interface do usuário são desabilitados, esses recursos são desabilitados. Quando os efeitos da interface do usuário são habilitados, somente os efeitos configurados como ativos para o usuário atual são habilitados.
A tabela a seguir lista as propriedades que indicam se determinados efeitos de interface do usuário estão habilitados, se o valor dessa propriedade for true:
| Item | Descrição |
|---|---|
| IsComboBoxAnimationEnabled | Indica se o efeito de abertura do slide para caixas de combinação está habilitado. |
| IsTitleBarGradientEnabled | Indica se o efeito de gradiente para barras de título de janela está habilitado. |
| IsHotTrackingEnabled | Indica se o acompanhamento frequente de elementos de interface do usuário, como nomes de menu nas barras de menu, está habilitado. |
| IsListBoxSmoothScrollingEnabled | Indica se o efeito de rolagem suave para caixas de listagem está habilitado. |
| IsMenuAnimationEnabled | Indica se os recursos de animação de slide ou de menu estão habilitados. |
| MenuAccessKeysUnderlined | Indica se as chaves de acesso ao menu estão sempre sublinhadas. |
| IsSelectionFadeEnabled | Indica se o efeito fade de seleção está habilitado. |
| IsToolTipAnimationEnabled | Indica se a animação ToolTip está habilitada. |