SystemTray.SetOpacity Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Sets the value of the Opacity attached property for a specified phone application page.
Namespace: Microsoft.Phone.Shell
Assembly: Microsoft.Phone (in Microsoft.Phone.dll)
Syntax
Public Shared Sub SetOpacity ( _
element As DependencyObject, _
opacity As Double _
)
public static void SetOpacity(
DependencyObject element,
double opacity
)
Parameters
- element
Type: System.Windows..::.DependencyObject
The page for which to set the Opacity attached property.
- opacity
Type: System..::.Double
The opacity factor to set for the system tray.
Remarks
Expected values are between 0.0 and 1.0. The opacity of the system tray can be adjusted finely, but we recommend that you use only values of 0.0, 0.5, and 1.0.
0.0 The system tray is completely transparent. The system tray is laid over the contents of the page, which show through. The page is not resized.
0.5 The system tray is partially transparent. The system tray is laid over the contents of the page, which show through. The page is not resized.
1.0 The system tray is completely opaque. The system tray covers the current page. The page is resized to the area of the screen not occupied by the system tray.
The system tray is also referred to as the status bar.
Examples
The following code example shows how to use the SystemTray class in conjunction with the ProgressIndicator class.
using Microsoft.Phone.Shell;
namespace SystemTrayTest
{
public partial class MainPage : PhoneApplicationPage
{
ProgressIndicator prog;
public MainPage()
{
InitializeComponent();
SystemTray.SetIsVisible(this, true);
SystemTray.SetOpacity(this, 0.5);
SystemTray.SetBackgroundColor(this, Colors.Purple);
SystemTray.SetForegroundColor(this, Colors.Yellow);
prog = new ProgressIndicator();
prog.IsVisible = true;
prog.IsIndeterminate = true;
prog.Text = "Click me...";
SystemTray.SetProgressIndicator(this, prog);
}
}
}
Imports Microsoft.Phone.Shell
Partial Public Class MainPage
Inherits PhoneApplicationPage
Dim prog As ProgressIndicator
Public Sub New()
InitializeComponent()
SystemTray.SetIsVisible(Me, true)
SystemTray.SetOpacity(Me, 0.5)
SystemTray.SetBackgroundColor(Me, Colors.Blue)
SystemTray.SetForegroundColor(Me, Colors.Yellow)
prog = new ProgressIndicator()
prog.IsVisible = true
prog.IsIndeterminate = true
prog.Text = "Click me..."
SystemTray.SetProgressIndicator(Me, prog)
End Sub
End Class
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1
Platforms
Windows Phone
See Also
Reference
Microsoft.Phone.Shell Namespace