GUI ScreenIO for
Windows|
GUI ScreenIO for
Windows |
An image control is used to display images. The data field associated with an image control is similar to a multiline edit control. It's just a text field that you load with the filename you wish to display.
You can also assign an event-ID to an image control. If you do, that event is returned to your program if the user clicks in the control.
GUI ScreenIO supports the following image types:
| Filetype | Description |
| .BMP | Windows bitmap - a standard format used by Windows to store images. Bitmaps use no compression, and consequently, the file size may be quite large. |
| .GIF | Graphics Interchange Format - a common format used for images that appear on Web pages. GIF images are compressed, but no quality is lost in compression/decompression. |
| .JPG | Joint Photographic Expert Group - a compression scheme that works well for natural images such as photographs. JPEG uses a "lossy" compression scheme; the more compression, the more information that is lost. |
| .EXIF | Exchangeable Image File - a file formay used for images captured by digital cameras. EXIF compression is identical to JPEG compression; EXIF files also contain information about the photograph (date and time, exposure data, camera make and model, etc.). |
| .PNG | Portable Network Graphics - a relatively new format that has many of the advantages of GIF (no information lost in compression/decompression) and also offers more capabilities. |
| .TIF | Tag Image File Format - a flexible and extendable format used by many platforms and image-processing applications. |
GUI ScreenIO can either provide scrollbars so that you can move around in a
large bitmap, or it can resize a bitmap to fit inside your image control.
Naturally, if the the aspect ratio of your image control is very different from
the bitmap's aspect ration, the image will be distorted!
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