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- PictureBox - Handle Click Event on Non-Transparent Area of Image 2 answers
- PictureBox - 处理图像2答案的非透明区域上的点击事件
I am drawing a square image with transparent background inside a pictureBox inside a Form with C#. I only want it to capture the mouse events with its visible part, but it happens that it captures events with its whole surface.
我正在使用C＃在Form中的一个pictureBox中绘制一个带有透明背景的方形图像。我只希望它捕获具有可见部分的鼠标事件，但它碰巧捕获整个表面的事件。
1 个解决方案
#1
1
This will work for SizeMode of Normal and AutoSize:
这适用于NormalMode of Normal和AutoSize：
if (new Bitmap(((PictureBox)sender).Image).GetPixel(e.X, e.Y).A >= 8)
// do stuff
otherwise you would probably have to do some calculations to get the pixel location.
否则你可能不得不做一些计算来获得像素位置。
If this works for you, you should also consider storing the bitmap in a variable instead of newing it up on every mouse event.
如果这适合您，您还应该考虑将位图存储在变量中，而不是在每次鼠标事件时将其新增。
EDIT: I used 8 just as a delta value instead of zero to leave some space for almost completely transparent pixels, but of course you don't have to.
编辑：我使用8作为delta值而不是零，为几乎完全透明的像素留出一些空间，但当然你不必。
#1
1
This will work for SizeMode of Normal and AutoSize:
这适用于NormalMode of Normal和AutoSize：
if (new Bitmap(((PictureBox)sender).Image).GetPixel(e.X, e.Y).A >= 8)
// do stuff
otherwise you would probably have to do some calculations to get the pixel location.
否则你可能不得不做一些计算来获得像素位置。
If this works for you, you should also consider storing the bitmap in a variable instead of newing it up on every mouse event.
如果这适合您，您还应该考虑将位图存储在变量中，而不是在每次鼠标事件时将其新增。
EDIT: I used 8 just as a delta value instead of zero to leave some space for almost completely transparent pixels, but of course you don't have to.
编辑：我使用8作为delta值而不是零，为几乎完全透明的像素留出一些空间，但当然你不必。