如何从ImageList加载透明图像? [英] How to load a transparent Image from ImageList?

问题描述

我想从TImageList到TImage加载图片(32位深度，透明).标准方法是ImageList.GetBitmap(Index, Image.Picture.Bitmap);.但是GetBitmap方法不适用于透明度，因此我总是得到一个不透明的位图.

I want to load a picture (32 bit-depth, transparent) from a TImageList to an TImage. The standard approach would be ImageList.GetBitmap(Index, Image.Picture.Bitmap);. However the GetBitmap method doesn't work with transparency, so I always get a non-transparent bitmap.

推荐答案

解决方法非常简单-ImageList提供了另一种方法GetIcon，该方法可以透明地工作.加载透明图像的代码为:

The workaround is rather simple - ImageList offers another method, GetIcon, which works OK with transparency. Code to load a transparent Image would be:

ImageList.GetIcon(Index, Image.Picture.Icon);

不要忘记设置适当的ImageList属性:

And don't forget to set proper ImageList properties:

ImageList.ColorDepth:=cd32bit;
ImageList.DrawingStyle:=dsTransparent;

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