Hi there,
I have a usercontrol that inherits from Windows.Forms.B utton.
In the OnCreateControl method I set the style of the control so that it supports transparent backcolor and set the background color to transparent.
.....
Protected Overrides Sub OnCreateControl ()
MyBase.OnCreate Control()
Call SetStyle(Contro lStyles.Support sTransparentBac kColor, True)
BackColor = Color.Transpare nt
End Sub
.....
I have an image with magenta sections which I remove using Bitmap.MakeTran sparent(Color.M agenta). Unfortunately when I draw this image onto the form the parts that were previously magenta, get drawn as black.
My question is, how do I draw this image with the magenta parts as transparent?
Many thanks in advance.
Nick.
3  4865 
Hi again,
I've changed the transparent initialisation and moved it to the
CreateParams override,
Protected Overrides ReadOnly Property CreateParams() As
System.Windows. Forms.CreatePar ams
Get
Dim pCPsParams As CreateParams = MyBase.CreatePa rams()
pCPsParams.ExSt yle = pCPsParams.ExSt yle Or &H20
Return (pCPsParams)
End Get
End Property
I am also overriding OnPaintBackgrou nd so that no background is drawn.
Unfortunately I still get black bits...
Nick.
"NickP" <a@a.comwrote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
Hi there,
I have a usercontrol that inherits from Windows.Forms.B utton.
In the OnCreateControl method I set the style of the control so that it
supports transparent backcolor and set the background color to transparent.
.....
Protected Overrides Sub OnCreateControl ()
MyBase.OnCreate Control()
Call SetStyle(Contro lStyles.Support sTransparentBac kColor, True)
BackColor = Color.Transpare nt
End Sub
.....
I have an image with magenta sections which I remove using
Bitmap.MakeTran sparent(Color.M agenta). Unfortunately when I draw this image
onto the form the parts that were previously magenta, get drawn as black.
My question is, how do I draw this image with the magenta parts as
transparent?
Many thanks in advance.
Nick.
I have changed my image to a PNG with the transparent parts in already.
Unfortunately I am getting the same issues,
My drawing routine contains the following code,
Call pevent.Graphics .Clear(Color.Fr omArgb(255, 0, 0, 0))
Call pevent.Graphics .DrawImage(butt onMap, _
New Rectangle(0, 0, Width, Height), _
getCurrentFrame SourceRect(), _
GraphicsUnit.Pi xel)
It seems that there is no way to clear the surface before redrawing as it
just comes out as black. How do I completely remove all colour information
from the back before redrawing? Ideally |I want to do this all to a back
buffer then redraw that, but at current I can't get it working either way.
Thanks for any help in advance.
Nick.
"NickP" <a@a.comwrote in message
news:ef******** ******@TK2MSFTN GP02.phx.gbl...
Hi again,
I've changed the transparent initialisation and moved it to the
CreateParams override,
Protected Overrides ReadOnly Property CreateParams() As
System.Windows. Forms.CreatePar ams
Get
Dim pCPsParams As CreateParams = MyBase.CreatePa rams()
pCPsParams.ExSt yle = pCPsParams.ExSt yle Or &H20
Return (pCPsParams)
End Get
End Property
I am also overriding OnPaintBackgrou nd so that no background is drawn.
Unfortunately I still get black bits...
Nick.
"NickP" <a@a.comwrote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
Hi there,
I have a usercontrol that inherits from Windows.Forms.B utton.
In the OnCreateControl method I set the style of the control so that it
supports transparent backcolor and set the background color to
transparent.
....
Protected Overrides Sub OnCreateControl ()
MyBase.OnCreate Control()
Call SetStyle(Contro lStyles.Support sTransparentBac kColor, True)
BackColor = Color.Transpare nt
End Sub
....
I have an image with magenta sections which I remove using
Bitmap.MakeTran sparent(Color.M agenta). Unfortunately when I draw this
image onto the form the parts that were previously magenta, get drawn as
black.
My question is, how do I draw this image with the magenta parts as
transparent?
Many thanks in advance.
Nick.
Hi again,
Okay I finally have it drawing correctly, but by inheriting from Panel
rather than Button, so it's not ideal tbh...
Nick.
"NickP" <a@a.comwrote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..
>I have changed my image to a PNG with the transparent parts in already.
Unfortunatel y I am getting the same issues,
My drawing routine contains the following code,
Call pevent.Graphics .Clear(Color.Fr omArgb(255, 0, 0, 0))
Call pevent.Graphics .DrawImage(butt onMap, _
New Rectangle(0, 0, Width, Height), _
getCurrentFrame SourceRect(), _
GraphicsUnit.Pi xel)
It seems that there is no way to clear the surface before redrawing as it
just comes out as black. How do I completely remove all colour
information from the back before redrawing? Ideally |I want to do this
all to a back buffer then redraw that, but at current I can't get it
working either way.
Thanks for any help in advance.
Nick.
"NickP" <a@a.comwrote in message
news:ef******** ******@TK2MSFTN GP02.phx.gbl...
>Hi again,
I've changed the transparent initialisation and moved it to the
CreateParams override,
Protected Overrides ReadOnly Property CreateParams() As
System.Windows .Forms.CreatePa rams
Get
Dim pCPsParams As CreateParams = MyBase.CreatePa rams()
pCPsParams.ExSt yle = pCPsParams.ExSt yle Or &H20
Return (pCPsParams)
End Get
End Property
I am also overriding OnPaintBackgrou nd so that no background is drawn.
Unfortunatel y I still get black bits...
Nick.
"NickP" <a@a.comwrote in message
news:%2******* *********@TK2MS FTNGP02.phx.gbl ...
Hi there,
I have a usercontrol that inherits from Windows.Forms.B utton.
In the OnCreateControl method I set the style of the control so that
it supports transparent backcolor and set the background color to
transparent.
....
Protected Overrides Sub OnCreateControl ()
MyBase.OnCreate Control()
Call SetStyle(Contro lStyles.Support sTransparentBac kColor, True)
BackColor = Color.Transpare nt
End Sub
....
I have an image with magenta sections which I remove using
Bitmap.MakeTra nsparent(Color. Magenta). Unfortunately when I draw this
image onto the form the parts that were previously magenta, get drawn as
black.
My question is, how do I draw this image with the magenta parts as
transparent?
Many thanks in advance.
Nick.
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