Re: Transparent Panel

Yes ok sorry I didn't understand what you needed. I think you can't
with a panel but you can create a Form and override the OnPaint method
of your Form and draw and fill the form you want. You will obtain 2
Forms but the second one will have transparent background.

Hope this help you

BR

Fabien Decret (Device Application Development MVP)
Windows Embedded Consultant

ADENEO (ADESET)
http://www.adeneo.adetelgroup.com/ | http://fabdecret.blogspot.com/


On 4 déc, 19:17, Simon <Si...@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
I can't read that post however it looks like its just doing transparent
bitmaps?

I am wanting a Panel to be transparent. So if a panel is ontop of a
PictureBox any controls in the Panel won't render a big white rectangle on
the Panel.

Thanks and take care.



"Fabien" wrote:
Hi,

Check out this:
http://fabdecret.blogspot.com/2007/11/transparent-background.html
But, it is only available for one transparency colour !

BR

Fabien Decret (Device Application Development MVP)
Windows Embedded Consultant

ADENEO (ADESET)
http://www.adeneo.adetelgroup.com/|http://fabdecret.blogspot.com/

On Dec 4, 6:12 pm, Simon <Si...@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hey gang.

I am working on making a transparent panel control. How this control works
is making itself invisible then invalidating its parent.

This works great until you get panels in panels & using auto scroll on the
Panel because the flickering that occurs when scrolling.

I am thinking this is because its invalidating a parent which invalidates
its parent etc and I believe its probably getting up to invalidating the form
level.

I am trying to achieve Panels that are transparent so if there is a
PictureBox behind them, it will show through.

As follows:

protected override void OnPaintBackground(PaintEventArgs e)
{
if (this.BackColor == Color.Transparent)
return;

base.OnPaintBackground(e);
}

protected override void OnPaint(PaintEventArgs e)
{
if (this.BackColor == Color.Transparent)
{
if (!isPaintBackgroundComplete)
{
this.Visible = false;
this.Parent.Invalidate(Bounds);
this.Parent.Update();
this.Visible = true;
isPaintBackgroundComplete = true;

return;
}
isPaintBackgroundComplete = false;
}
}

Is there a better way to achieve this? As mentioned this mostly flickers
when scrolling because I think its invalidating 2-3-4 parents up to the form
level.

Is there any PInvoke support that could help out here? I could not find
anything on google. Everything I saw was for the full framework.

I would appreciate any help.

Thanks and take care.- Masquer le texte des messages précédents -

- Afficher le texte des messages précédents -

.

Relevant Pages

  • Re: Transparent Panel
    ... I am wanting a Panel to be transparent. ... I am thinking this is because its invalidating a parent which invalidates ...
    (microsoft.public.dotnet.framework.compactframework)
  • Re: Transparent Panel
    ... Don't be confused with a window being transparent. ... If you look at my code, how it "hacks" a transparent panel is by hidding ... itself then invalidating its region on the Parent control thus rendering it ... This causes much flickering when scrolling because eventually it gets up to ...
    (microsoft.public.dotnet.framework.compactframework)
  • Re: How to invoke parents method?
    ... My wxPython program includes a panel whose parent is a frame. ... def methodx: ...
    (comp.lang.python)
  • Re: Transparent Panel
    ... Windows Embedded Consultant ... If you look at my code, how it "hacks" a transparent panel is by hidding ... itself then invalidating its region on the Parent control thus rendering it ... This causes much flickering when scrolling because eventually it gets up to ...
    (microsoft.public.dotnet.framework.compactframework)
  • Re: consuming mouse events
    ... >> Imagine I have a panel that contains lots of components. ... the component, not the parent. ... if the original press was ...
    (comp.lang.java.gui)
Loading