making transparent panel to show buttons behind it

Question

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i want to make transparent panel to show buttons behind it
but i don't know how to send panel's location to it's parent(the form)
when i override InvokePaintBackground()to show buttons in back ground of panel

thanks for help

Posted 20-Jun-12 23:46pm

Moosavi S.M.

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Herman<T>.Instance 21-Jun-12 8:40am

is there any code we can look into?

Moosavi S.M. 24-Jun-12 10:42am

my code was borrowed from article "Creating-Transparent-Controls-in-NET-Compact-Frame" in the site!!
i just want to add transpPanel class to my code istead of transplabel in that code!
i'm looking for a way to send panel's location to it's parent(form) in
parent.OnPaintbackground(e) to make the parent draws itself from panel's location into panel's bg to make panel look transparent!!!

your help will be appreciated

Sergey Alexandrovich Kryukov 22-Jun-12 22:48pm

Why doing it? What do you want to achieve? I don't advise to use transparency in Forms controls, it does not really work.
--SA

Member 13404993 12-Sep-17 2:38am

On setting transparency only able to see the parent not the button. Any other option to see the button?

3 solutions

Solution 1

As the simple step, if you go to the Backcolor property, and change the Selector to "Web" the first choice is Transparent. I believe that the backcolor of the panel would inherit the color of the component it is on

Posted 23-Jun-12 20:26pm

Ganesan Senthilvel

Comments

Dave Kreskowiak 22-Sep-13 9:39am

Yes, but you won't see the controls behind the Panel.

Member 13404993 12-Sep-17 2:40am

Yah. Any other option to see the button?

Dave Kreskowiak 12-Sep-17 8:19am

Don't resurrect a five year old question.

Ask your own question by going to the "quick answers" menu and clicking "Ask a question".

Solution 2

Nice CodeProject article is available at A Reflective and Translucent Glass Panel[^]

Posted 23-Jun-12 20:26pm

Ganesan Senthilvel

Comments

V.Lorz 1-Sep-13 6:01am

I wouldn't call it 'article'. It is only VB code, with next to nothing of information describing what is done and why.

Just as SA sayd in his comment, transparency doesn't work in WinForm applications. I run the project in Win 8 and played a little bit with it, just to be sure, and the result was 'no transparency'.

BillWoodruff 22-Sep-13 5:31am

Voted #3. A reasonably appropriate suggestion to the OP; even if the code won't really give you transparency, there's a lot you can learn from studying it.

BillWoodruff 22-Sep-13 5:44am

@V.Lorz fyi: There is a C# translation version of the cited article's code, in the comments on the article by Chona1171. While Chona's code, like the article's, does not successfully implement transparency (in Win 8), imho it is an extremely useful example to study to see what can be done in WinForms with defining custom backgrounds for a Control. I found Chona's code quite readable.

And, it does work, to a degree, in Win8 (I tested the C# version only), creating rather pleasant looking Panels with a gradient fill, rounded corners, an interior thin black outline, etc.

bill

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Moosavi S.M. · Accepted Answer · 2013-09-21T22:48:00

Solution 5

i have found the solution!

override onPaintBackground() eventhandler of the panel and leave it blank
so every time the panel redraws it fills nothing in it's bg so behind objects
will appear!

protected override void onPaintBackground("args here")
{
//blank
}

Posted 21-Sep-13 22:48pm

Moosavi S.M.

Comments

Dave Kreskowiak 22-Sep-13 9:40am

Yeah, you might want to test that more extensively. Try dragging another window over the top of that panel to make sure it's going to do what you want.

BillWoodruff 23-Sep-13 3:14am

If you wanted a Panel to just disappear, so Controls behind it "show up," why don't you just hide it ? If your goal is to show Controls, but not to allow the user to interact with them, why not just disable the Controls ?

Your question never really stated your goal here clearly.

But, as others here have commented, I think it's a waste of time to try and achieve any really useful transparency function with a Win Control (although some, like, Label, have that built-in).

Years ago, I spent some time researching, and experimenting, trying to create a variable transparency Panel, and it "kind-of" worked, but was never satisfactory: the Panel cannot be double-buffered; it will not properly re-draw what's behind it when transparency is changed at run-time, etc.; it will display odd behavior at design-time, "capturing" a kind of screen shot of what it's over when you move it, and so forth. For true transparency, I think you should consider WPF.

Member 13404993 12-Sep-17 2:46am

I have a control with a context menu. But now I want to see the same control with different context menu from previous. So my plan is to put a transparent panel over the control and add new context on that transparent panel. But on setting bgcolor to transparent it shows the parent. How will I show that control below the panel?