What is the Custom Clipper widget in Flutter? How do you make custom clippers in Flutter?
In this article, I am going to talk about a fancy topic in the Flutter framework. I’m sure all of you have seen some amazingly shaped images, shaped objects, or rendered paths in an app. That is the topic today, which is called Custom Clipper in Flutter. By the end of this article, you should understand how to create clipping paths and custom clip paths with images.
Flutter has a class that is CustomClipper. You will be able to create your own clippings and shapes. CustomClipper is a very useful class in Flutter to create clipping paths. Flutter has built-in clippers such as ClipOval, ClipRect, ClipRRect, and ClipPath. These are pre-built widgets to get ovalish, rectangularish, or rounded rectangularish clippings. These widgets are very simple to use. You have only written a few lines of code. That means you have to follow two steps, which are to wrap your image with the widget mentioned above and provide the necessary parameters. Then you complete your task. You can now get a sense of Flutter’s built-in clippers.
But if you have an idea for new shapes that aren’t in the Flutter framework, and Flutter doesn’t have any pre-built classes or methods to use those. In this scenario, CustomClipper will come to your aid. Let’s go to clip your image as you need it.
Before you go to custom clipping, you should take the below steps.
Following these steps, you can easily make your shape visually.
After reaching step three, you have to do the other two steps. Here you should have an idea of what you want to make and which type of clipping you should use. I’m sure for the first time you haven’t got an idea about which type of clipping I should use. Don’t worry, you’ll get an idea at the end of this article. Remember, we stay on step three.
There are 2 types of clippings.
1. Line Clipping
2. Bezier Curve Clipping
The main difference is that Line clip can make only straight lines, while Bezier curve clip can make curved lines. If your shape has both lines, you must use both of these two types when you make your custom clip.
Line Clipping
Assume you have a scissor and a hard copy of your shape. Then You put your shape on the image and cut it using the scissor. All of these processes start from the top-left corner. Remember That is a must and rule. Line clipping is also the same as this scissor example.
You said to the scissor that this is the road and these points are the turning points. Then the scissors will go down this path. As a result, it will give you an image that is clipped with the shape that was expected. This is the whole process of this clipping in the Flutter framework.
Now we resolve it technically with code.
I will explain this process with the scissor, which will help you to understand how to do line clipping work. You can see the lineTo () method in this code, which helps you move your scissor to the expected points. The Scissor start from point A. Then the first lineTo() method helps to move the scissor to Point B. Now the scissor stops at point B, which is the current point of the scissor. Then it will scissor move from its current point to Point C using the second lineTo() method. These processes follow points C, D, and E. Finally, use the close() method. Using this method, the scissor go from last point to starting point ( E to A), which will complete your shape as you expected. All points have X and Y coordinates. Here we have used height and width, which came from the container widget of the image widget.
I think you got a sense of the Line clipping of the Flutter framework. OK, this is the time for you to start your practices with Line Clipping. Our next topic is Bezier Curve Clipping, which will be an amazing topic. I’ll upload it as a separate article.🙂🙂
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Thank You. 🤝🤝
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