HasOpenWindows Property

Returns whether there are any desktop alert windows currently open for this UltraDesktopAlert instance.

[Visual Basic]
Public ReadOnly Property HasOpenWindows As Boolean

[C#]
public bool HasOpenWindows {get;}

Example

The following code sample demonstrates how the properties of the UltraDesktopAlert component can be used to customize the appearance and behavior of all desktop alert windows displayed by the component:

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

[Visual Basic]

Imports Infragistics.Win

Imports Infragistics.Win.Misc



    Private Sub button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button2.Click

        '  Make sure there are no desktop alert windows currently

        '  open before proceeding

        If (Me.desktopAlert.HasOpenWindows) Then Return



        '  Set the Opacity property to 90% opacity, to make the

        '  desktop alert window a little more noticable than it is with

        '  the default (80% opacity).

        Me.desktopAlert.Opacity = 0.9F



        '  Use the animation related properties to make the desktop alert

        '  window appear to fade into view, as well as scroll from the left

        '  edge of the screen towards the right. Use an animation speed of

        '  medium so the scrolling does not appear sluggish.

        Me.desktopAlert.AnimationSpeed = AnimationSpeed.Medium

        Me.desktopAlert.AnimationStyleShow = AnimationStyle.FadeAndScroll

        Me.desktopAlert.AnimationStyleAutoClose = AnimationStyle.FadeAndScroll

        Me.desktopAlert.AnimationScrollDirectionShow = AnimationScrollDirection.LeftToRight

        Me.desktopAlert.AnimationScrollDirectionAutoClose = AnimationScrollDirection.RightToLeft



        '  Disallow moving the desktop alert window, and prevent

        '  multiple alerts from appearing.

        Me.desktopAlert.AllowMove = DefaultableBoolean.False

        Me.desktopAlert.MultipleWindowDisplayStyle = MultipleWindowDisplayStyle.None



        '  Set AutoClose to true, and set AutoCloseDelay to a relatively

        '  high value so that the end user has enough time to notice the alert.

        Me.desktopAlert.AutoClose = DefaultableBoolean.True

        Me.desktopAlert.AutoCloseDelay = 30000



        '  Make the main image appear a bit larger than the default size,

        '  and the button images appear smaller.

        Me.desktopAlert.ImageSize = New Size(48, 48)

        Me.desktopAlert.ButtonImageSize = New Size(12, 12)



        '  Use the button appearances and the ButtonStyle property to

        '  change the visual appearance of the buttons.

        Me.desktopAlert.ButtonStyle = UIElementButtonStyle.PopupSoftBorderless



        Dim office2007Colors As Office2007ColorTable = Office2007ColorTable.Colors

        Dim normalButtonAppearance As New Infragistics.Win.Appearance()

        normalButtonAppearance.BackColor = office2007Colors.ToolbarGradientLight

        normalButtonAppearance.BackColor2 = office2007Colors.ToolbarGradientDark

        normalButtonAppearance.BackGradientStyle = GradientStyle.GlassTop37Bright



        '  Note that the ForeColor of the button appearances is used to render

        '  the dropdown button's arrow indicator and the close button's "x".

        normalButtonAppearance.ForeColor = office2007Colors.ToolbarUnderline



        Dim hotTrackButtonAppearance As New Infragistics.Win.Appearance()

        hotTrackButtonAppearance.BackColor = office2007Colors.HighlightPressedGradientLight

        hotTrackButtonAppearance.BackColor2 = office2007Colors.HighlightPressedGradientDark

        hotTrackButtonAppearance.BackGradientStyle = GradientStyle.GlassBottom37Bright



        Dim pressedButtonAppearance As New Infragistics.Win.Appearance()

        pressedButtonAppearance.BackColor = office2007Colors.HighlightPressedGradientDark

        pressedButtonAppearance.BackColor2 = office2007Colors.HighlightPressedGradientLight

        pressedButtonAppearance.BackGradientStyle = GradientStyle.GlassTop37Bright



        Me.desktopAlert.ButtonAppearance = normalButtonAppearance

        Me.desktopAlert.ButtonHotTrackAppearance = hotTrackButtonAppearance

        Me.desktopAlert.ButtonPressedAppearance = pressedButtonAppearance



        '  Make the dropdown button visible, and hook the DropDownButtonClicked

        '  event so we can handle clicks on the button. Also, handle the

        '  DesktopAlertClosing event so we can keep the window open when the

        '  ContextMenu is visible

        Me.desktopAlert.DropDownButtonVisible = DefaultableBoolean.True

        AddHandler Me.desktopAlert.DropDownButtonClicked, AddressOf Me.OnDropDownButtonClicked

        AddHandler Me.desktopAlert.DesktopAlertClosing, AddressOf Me.OnDesktopAlertClosing



        '  Create a ContextMenu which we will display when the dropdown

        '  button is clicked.

        Me._contextMenu.MenuItems.Add(New MenuItem("Cut", AddressOf Me.OnMenuItemClick))

        Me._contextMenu.MenuItems.Add(New MenuItem("Copy", AddressOf Me.OnMenuItemClick))

        Me._contextMenu.MenuItems.Add(New MenuItem("Paste", AddressOf Me.OnMenuItemClick))



        '  Add some alert buttons, which appear alongside the bottom edge

        '  of the desktop alert window. Hook the AlertButtonClicked event

        '  so we can handle clicks on the buttons.

        Dim closeButton As UltraDesktopAlertButton = Me.desktopAlert.AlertButtons.Add("close")

        closeButton.Appearance.Image = New Icon("C:\Icons\Close.ico").ToBitmap()

        closeButton.ToolTipText = "Close the application"



        Dim viewButton As UltraDesktopAlertButton = Me.desktopAlert.AlertButtons.Add("view")

        viewButton.Appearance.Image = New Icon("C:\Icons\View.ico").ToBitmap()

        viewButton.ToolTipText = "Refresh the view"



        AddHandler Me.desktopAlert.AlertButtonClicked, AddressOf Me.OnAlertButtonClicked

    End Sub

[C#]

using Infragistics.Win; 
using Infragistics.Win.Misc; 
using System.Diagnostics; 
 
    private void button2_Click(object sender, EventArgs e) 
    { 
        //  Make sure there are no desktop alert windows currently 
        //  open before proceeding 
        if ( this.desktopAlert.HasOpenWindows ) 
            return; 
 
        //  Set the Opacity property to 90% opacity, to make the 
        //  desktop alert window a little more noticable than it is with 
        //  the default (80% opacity). 
        this.desktopAlert.Opacity = .9f; 
 
        //  Use the animation related properties to make the desktop alert 
        //  window appear to fade into view, as well as scroll from the left 
        //  edge of the screen towards the right. Use an animation speed of 
        //  medium so the scrolling does not appear sluggish. 
        this.desktopAlert.AnimationSpeed = AnimationSpeed.Medium; 
        this.desktopAlert.AnimationStyleShow = AnimationStyle.FadeAndScroll; 
        this.desktopAlert.AnimationStyleAutoClose = AnimationStyle.FadeAndScroll; 
        this.desktopAlert.AnimationScrollDirectionShow = AnimationScrollDirection.LeftToRight; 
        this.desktopAlert.AnimationScrollDirectionAutoClose = AnimationScrollDirection.RightToLeft; 
         
        //  Disallow moving the desktop alert window, and prevent 
        //  multiple alerts from appearing. 
        this.desktopAlert.AllowMove = DefaultableBoolean.False; 
        this.desktopAlert.MultipleWindowDisplayStyle = MultipleWindowDisplayStyle.None; 
 
        //  Set AutoClose to true, and set AutoCloseDelay to a relatively 
        //  high value so that the end user has enough time to notice the alert. 
        this.desktopAlert.AutoClose = DefaultableBoolean.True; 
        this.desktopAlert.AutoCloseDelay = 30000; 
 
        //  Make the main image appear a bit larger than the default size, 
        //  and the button images appear smaller. 
        this.desktopAlert.ImageSize = new Size( 48, 48 ); 
        this.desktopAlert.ButtonImageSize = new Size( 12, 12 ); 
 
        //  Use the button appearances and the ButtonStyle property to 
        //  change the visual appearance of the buttons. 
        this.desktopAlert.ButtonStyle = UIElementButtonStyle.PopupSoftBorderless; 
 
        Office2007ColorTable office2007Colors = Office2007ColorTable.Colors; 
        Infragistics.Win.Appearance normalButtonAppearance = new Infragistics.Win.Appearance(); 
        normalButtonAppearance.BackColor = office2007Colors.ToolbarGradientLight; 
        normalButtonAppearance.BackColor2 = office2007Colors.ToolbarGradientDark; 
        normalButtonAppearance.BackGradientStyle = GradientStyle.GlassTop37Bright; 
 
        //  Note that the ForeColor of the button appearances is used to render 
        //  the dropdown button's arrow indicator and the close button's "x". 
        normalButtonAppearance.ForeColor = office2007Colors.ToolbarUnderline; 
 
        Infragistics.Win.Appearance hotTrackButtonAppearance = new Infragistics.Win.Appearance(); 
        hotTrackButtonAppearance.BackColor = office2007Colors.HighlightPressedGradientLight; 
        hotTrackButtonAppearance.BackColor2 = office2007Colors.HighlightPressedGradientDark; 
        hotTrackButtonAppearance.BackGradientStyle = GradientStyle.GlassBottom37Bright; 
 
        Infragistics.Win.Appearance pressedButtonAppearance = new Infragistics.Win.Appearance(); 
        pressedButtonAppearance.BackColor = office2007Colors.HighlightPressedGradientDark; 
        pressedButtonAppearance.BackColor2 = office2007Colors.HighlightPressedGradientLight; 
        pressedButtonAppearance.BackGradientStyle = GradientStyle.GlassTop37Bright; 
 
        this.desktopAlert.ButtonAppearance = normalButtonAppearance; 
        this.desktopAlert.ButtonHotTrackAppearance = hotTrackButtonAppearance; 
        this.desktopAlert.ButtonPressedAppearance = pressedButtonAppearance; 
 
        //  Make the dropdown button visible, and hook the DropDownButtonClicked 
        //  event so we can handle clicks on the button. Also, handle the 
        //  DesktopAlertClosing event so we can keep the window open when the 
        //  ContextMenu is visible 
        this.desktopAlert.DropDownButtonVisible = DefaultableBoolean.True; 
        this.desktopAlert.DropDownButtonClicked += new DropDownButtonClickedHandler(this.OnDropDownButtonClicked); 
        this.desktopAlert.DesktopAlertClosing += new DesktopAlertClosingHandler(this.OnDesktopAlertClosing); 
 
        //  Create a ContextMenu which we will display when the dropdown 
        //  button is clicked. 
        EventHandler clickHandler = new EventHandler( this.OnMenuItemClick ); 
        this.contextMenu.MenuItems.Add( new MenuItem( "Cut", clickHandler ) ); 
        this.contextMenu.MenuItems.Add( new MenuItem( "Copy", clickHandler ) ); 
        this.contextMenu.MenuItems.Add( new MenuItem( "Paste", clickHandler ) ); 
 
        //  Add some alert buttons, which appear alongside the bottom edge 
        //  of the desktop alert window. Hook the AlertButtonClicked event 
        //  so we can handle clicks on the buttons. 
        UltraDesktopAlertButton closeButton = this.desktopAlert.AlertButtons.Add( "close" ); 
        closeButton.Appearance.Image = new Icon( @"C:\Icons\Close.ico" ).ToBitmap(); 
        closeButton.ToolTipText = "Close the application"; 
 
        UltraDesktopAlertButton viewButton = this.desktopAlert.AlertButtons.Add( "view" ); 
        viewButton.Appearance.Image = new Icon( @"C:\Icons\View.ico" ).ToBitmap(); 
        viewButton.ToolTipText = "Refresh the view"; 
 
        this.desktopAlert.AlertButtonClicked += new AlertButtonClickedHandler(this.OnAlertButtonClicked); 
    }

See Also

Language

HasOpenWindows Property

Example

See Also