If your like me, you have probably seen way too many demos of the opacity
property of a form. Well I finally have a need for it and I am having an
issue.
I am trying to create a splash screen that looks like Adobe Acrobat's which
appears to draw outside its bounds. To do this, I am setting the
Transparency of the SplachScreen form to its background color and then
drawing my screen (which appears to have no background). It looks really
cool but I now want the screen to fade out on close. To do this I am slowly
changing the opacity of the form. Now for the issue:
As the opacity changes the background color is also changed and no longer
matches the TransparencyKey which results in the form being visible during
the fade out. How can I fix this? Is there a way to calculate the
resulting color of after opacity transformation?
Thanks,
Brian
Private Sub SplashScreen_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Me.TransparencyKey = Me.BackColor
Dim DelayedCloser As New Closer(AddressOf DelayedClose)
DelayedCloser.BeginInvoke(Nothing, Nothing)
End Sub
Private Sub SplashScreen_Paint(ByVal sender As Object, ByVal e As
System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
e.Graphics.FillRectangle(Brushes.Khaki, New Rectangle(100, 0, 300,
200))
e.Graphics.DrawString("Logo", New Font("Arial", 36, FontStyle.Bold,
GraphicsUnit.Pixel), Brushes.Navy, 105, 10)
e.Graphics.DrawLine(Pens.Navy, 0, 50, 200, 50)
e.Graphics.DrawLine(Pens.Navy, 25, 55, 200, 55)
e.Graphics.DrawLine(Pens.Navy, 50, 60, 200, 60)
End Sub
Private Delegate Sub Closer()
Private Sub DelayedClose()
Threading.Thread.CurrentThread.Sleep(2000)
For o As Double = 1.0 To 0.0 Step -0.1
Me.Opacity = o
Threading.Thread.CurrentThread.Sleep(10)
Next
Me.Close()
End Sub 1 4464
Changing the background color of the form to white fixes the problem (white
is not effected by the opacity).
I would still like to know how to calculate the resulting color after
opacity is changed. If anybody out there knows, please let me know.
"Brian" <bb******@optonline.net> wrote in message
news:OP**************@TK2MSFTNGP15.phx.gbl... If your like me, you have probably seen way too many demos of the opacity property of a form. Well I finally have a need for it and I am having an issue.
I am trying to create a splash screen that looks like Adobe Acrobat's which appears to draw outside its bounds. To do this, I am setting the Transparency of the SplachScreen form to its background color and then drawing my screen (which appears to have no background). It looks really cool but I now want the screen to fade out on close. To do this I am slowly changing the opacity of the form. Now for the issue:
As the opacity changes the background color is also changed and no longer matches the TransparencyKey which results in the form being visible during the fade out. How can I fix this? Is there a way to calculate the resulting color of after opacity transformation?
Thanks,
Brian
Private Sub SplashScreen_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.TransparencyKey = Me.BackColor Dim DelayedCloser As New Closer(AddressOf DelayedClose) DelayedCloser.BeginInvoke(Nothing, Nothing) End Sub
Private Sub SplashScreen_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint e.Graphics.FillRectangle(Brushes.Khaki, New Rectangle(100, 0, 300, 200)) e.Graphics.DrawString("Logo", New Font("Arial", 36, FontStyle.Bold, GraphicsUnit.Pixel), Brushes.Navy, 105, 10) e.Graphics.DrawLine(Pens.Navy, 0, 50, 200, 50) e.Graphics.DrawLine(Pens.Navy, 25, 55, 200, 55) e.Graphics.DrawLine(Pens.Navy, 50, 60, 200, 60) End Sub
Private Delegate Sub Closer()
Private Sub DelayedClose() Threading.Thread.CurrentThread.Sleep(2000) For o As Double = 1.0 To 0.0 Step -0.1 Me.Opacity = o Threading.Thread.CurrentThread.Sleep(10) Next Me.Close() End Sub This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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