Add transparency to images on wxBitmapButton Topic is solved

[extreme001]

Hi.

I got a problem with wxBitmapButton. I'm working with PNG-Images on wxBitmapButton, The PNG-Images have transparency. If I load the png, there is no transparency.

Here is some code:

Code: Select all

else if (name == _T("icons/btn_cash_game_de.png"))
    {
        m_sPath = wxString::Format(_T("%s%s"),wxGetApp().PathStd.Get().GetDataDir(),_T("\\icons\\btn_cash_game_de.png"));
		wxBitmap bitmap(m_sPath, wxBITMAP_TYPE_PNG);
        return bitmap;
    }

That's the way i'm loading the images. After starting the app, the transparent area is not transparent.

Any ideas?

Thank you very much.

[papillon68]

Same problem here. IIRC in previous releases (2.6) it was working.

[Grrr]

I had some other problems with wxBitmapButton as well which were solved when I first create a wxImage, then a wxBitmap from this image.

Code: Select all

	wxImage image(imagePath);
	wxBitmap bitmap;
	if (image.IsOk())
		bitmap = wxBitmap(image);

At least transparent PNG images work this way (I haven't tried PNG images with Alpha channel). That is on Windows with wxWidgets 2.8.9.

[papillon68]

Even this way it doesn't work...

[papillon68]

I also tried using a mask: it does work, meaning the cut away unwanted parts of the image, but you can see the wxbitmapbutton background color anyway, so it is not made transparent.

Please anyone ?

[Auria]

I also tried using a mask: it does work, meaning the cut away unwanted parts of the image, but you can see the wxbitmapbutton background color anyway, so it is not made transparent.

Please anyone ?

Not sure what you mean here; isn't it normal that you see the background of the bitmap button through transparent areas of the image?

[papillon68]

I was expecting that also the background part of the button would be made transparent.

Image that you have a panel with a background image.

I'd like to add a bitmapbutton with a circular shape, how would I do that ?
Use a png with as a background image for the button, right ?
But the problem is that, no matter what, the bitmapbutton always has a background color and therefore does not allow to see the panel background...

[Auria]

I was expecting that also the background part of the button would be made transparent.

Image that you have a panel with a background image.

I'd like to add a bitmapbutton with a circular shape, how would I do that ?
Use a png with as a background image for the button, right ?
But the problem is that, no matter what, the bitmapbutton always has a background color and therefore does not allow to see the panel background...

Well yeah, if you want a clickable icon, with no button visible under, try passing flag wxNO_BORDER. Otherwise, just draw the icon on a small panel and catch mouse events on it.