How to use CImageList?

2 years ago
Ava Mitchell
2 minutes

CImageList is a class in MFC used for managing and displaying a group of images. Here are some commonly used methods of CImageList:

  1. Create a new image list.
  2. Create a function that takes input parameters such as cx, cy, nFlags, nInitial, and nGrow, and returns a boolean value.
  3. Explanation of parameters:
  4. cx: The width of each image.
  5. cy: height of each image.
  6. nFlags: Flags for the image list, can be one or a combination of the following:

    ILC_COLOR: Images use color.
    ILC_COLOR4: Images use 4-bit color.
    ILC_COLOR8: Images use 8-bit color.
    ILC_COLOR16: Images use 16-bit color.
    ILC_COLOR24: Images use 24-bit color.
    ILC_COLOR32: Images use 32-bit color.
    ILC_MASK: Images include a mask.
    ILC_PALETTE: Images use a palette.

  7. Initial size of the image list.
  8. nGrow: The size of the increase in the image list.
  9. Insert a picture into the list of images.
  10. Add two CBitmap objects, one for the main image and one for the mask image.
  11. Parameter description:
  12. pBitmap: pointer to the bitmap to be added.
  13. pBitmapMask: a pointer to the mask bitmap associated with the bitmap.
  14. Draw: Render the images in the image list on the device context.
  15. Is the function Draw taking in a CDC pointer, integer nImage, a point object pt, and an unsigned integer nStyle?
  16. Explanation of Parameters:
  17. pDC: Pointer to device context, used for drawing images.
  18. Image: Index of the image to be drawn.
  19. en: The top left position of the image.
  20. nStyle: The style of drawing images, which can be one of the following or a combination of them:

    ILD_NORMAL: Drawing images normally.
    ILD_SELECTED: Drawing images in selected state.
    ILD_FOCUS: Drawing images in focus state.
    ILD_BLEND25: Drawing images blended by 25%.
    ILD_BLEND50: Drawing images blended by 50%.
    ILD_BLEND: Drawing blended images.

  21. Remove: Delete one image from the image list.
  22. Is the function Remove successful in removing the specified image?
  23. Description of parameters:
  24. Image: Index of the image to be removed.
  25. GetImageCount: Obtain the number of images in the image list.
  26. Return the count of images.

These are just some methods of the CImageList class, there are other methods available for managing and manipulating image lists.

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