App

The first call in every app is core.NewBody. This creates and returns a new body, which is a container in which app content is placed. This takes an optional name, which is used for the title of the app/window/tab.

After calling NewBody, you add widgets to the body that was returned, which is typically given the local variable name b for body.

Then, after adding content to your body, you can create and start a window from it using core.Body.RunMainWindow.

Therefore, the standard structure of an app looks like this:

package main

import "cogentcore.org/core/core"

func main() {
	b := core.NewBody("App Name")
	// Add app content here
	b.RunMainWindow()
}

For most of the code examples on this website, we will omit the outer structure of the app so that you can focus on the app content.