Largest Provider of Commercial Smalltalk
Cincom is one of the largest commercial providers of Smalltalk, with twice as many customers and partners as other commercial providers.

Tom Nies

Get Started

The Cincom® ObjectStudio® GUI Files: Transparency

Posted on in Categories ObjectStudio

For the image, we use a PNG file with a transparent color. We use our GDI+ library to draw this image on the window.

  1. Translucent Window with title barTransparency1This instance of UITransparentView uses a light-gray background, and the opacity is set to 180 (0 = invisible, 255 = full opaque). The window shows the usual title bar, including the minimize/maximize/close button, and the frame.All items are translucent; you can see the content below the entire window.
  2. Translucent window without title barTransparency2Here, we remove all of the styles from the window, but still set a light-gray background and the opacity to 180.  The window does not show a title bar or a frame, but the content is still translucent.The image below shows the window using a white background, rather than light gray.


  3. Window invisible, image opaque
    In this case, we remove all style flags, do not set a background color and set the window to be fully opaque. The result shows a solid image, except for the transparent color parts of the image, which are fully transparent. Setting the frame window to full transparency would cause the image to be invisible too.

    You can put any available control or define accelerator keys on UITransparentView as well.

    With the ObjectStudio NG UI, not only can you create a transparent window, you also have full control of what you want to display and how transparent/opaque you want it to be.