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Iron
Veteran
Greetings,
There seems to be an issue with the RadDesktopAlert on Windows 7.
The code below illustrates how I create an instance of RadDesktopAlert and setting its properties to my desired values :
Dim dskAlert As New RadDesktopAlert
Sub ShowAlert()
dskAlert.ResetLocationModifier()
dskAlert.IsPinned = True
dskAlert.AutoClose = False
dskAlert.CanMove = True
dskAlert.Opacity = 1
dskAlert.Popup.Parent = ME
dskAlert.ThemeName = "VisualStudio2012Light"
dskAlert.FadeAnimationFrames = 10
dskAlert.FadeAnimationType = FadeAnimationType.FadeIn
dskAlert.PopupAnimationFrames = 20
dskAlert.PopupAnimationEasing = Telerik.WinControls.RadEasingType.InOutCubic
dskAlert.PopupAnimationDirection = RadDirection.Down
dskAlert.ShowCloseButton = True
dskAlert.ContentText = "This is a test"
dskAlert.RightToLeft = System.Windows.Forms.RightToLeft.No
dskAlert.ScreenPosition = Telerik.WinControls.UI.AlertScreenPosition.Manual
dskAlert.ShowOptionsButton = False
dskAlert.ShowPinButton = False
dskAlert.PlaySound = False
dskAlert.AutoSize = True
dskAlert.Popup.AlertElement.Font = New Font("Tahoma", 10, FontStyle.Regular)
dskAlert.Popup.AlertElement.ContentElement.TextAlignment = ContentAlignment.MiddleCenter
dskAlert.Popup.AlertElement.ForeColor = Color.Red
dskAlert.Popup.AlertElement.ContentElement.Font = New Font("Tahoma", 10, FontStyle.Regular)
AddHandler dskAlert.Popup.PopupOpening, AddressOf dskAlert_PopupOpening
dskAlert.Show()
End Sub
Private Sub dskAlert_PopupOpening(sender As Object, args As CancelEventArgs)
Dim arg = TryCast(args, RadPopupOpeningEventArgs)
arg.CustomLocation = New Point((Me.Width - dskAlert.Popup.Width) \ 2,
(Me.Height - dskAlert.Popup.Height) \ 2)
End SubIt works fine on my Windows 8.1, however, the RadDesktopAlert box doesn't show up on Windows 7 as I tested many times. After several attempts to find out what causes the issue, I found the code line below to be the cause :
dskAlert.Popup.Parent = MEIt seems that setting parent property of the popup property makes the popup box invisible. I preferred to write "INVISIBLE", because there seems to be an invisible from showing up in front of the main form and this makes all the controls of the main form UnClickable.
What's your opinion about this issue ?
1 Answer, 1 is accepted
Hello George,
After looking into your issue, I've found similar behavior on Windows 10. The issue is closely related to setting the Parent of the Popup.
RadDesktopAlert is generally used as desktop alert window and thus it calculates its location in desktop coordinates. Setting a Parent messes with this logic.
As for Windows 7 I can assume that the alert window is placed somewhere outside the Parent window and that's why you cannot see it. Since the alert window has a parent - it is blocking the parent until it is closed.
Another problem might be connected to the fact that different Windows versions use different versions of Desktop Window Manager (DWM). DWM works differently on Windows 7 and Windows 8. We set certain flags using the DWM and this might lead to different results. I will need further to investigate the issue on a Windows 7 machine.
Keep in mind that RadDesktopAlert is designed to work on the Desktop and not on a particular window, so setting a Parent to the Popup is not recommended. Can you tell me, why do you need to set a Parent?
I can recommend to use the alert window without setting a parent. If there is anything else, do not hesitate to write back.
Regards,
Stoyan
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