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Getting Started Creating your first Fyne app Run Fyne Demo Application and RunLoop Updating Content in your GUI Window Handling Testing Graphical Apps Packaging for Desktop Mobile Packaging Run in a Browser App Metadata Distributing to App Stores Compiling for different platforms

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Canvas and CanvasObject Container and Layouts Widget List Layout List Dialog List Theme Icons Adding Shortcuts to an App Using the Preferences API Adding app translations System Tray Menu Data Binding Compile Options

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Box Grid Grid Wrap Border Form Center Max AppTabs

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List Table Tree

Data Binding

Data Binding Binding Simple Widgets Two-Way Binding Data Conversion List Data

Extending Fyne

Building a Custom Layout Writing a Custom Widget Bundling resources Creating a Custom Theme Extending Widgets Numerical Entry

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Geometry Scaling Widgets Organisation and Packages

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Layout and Widget Size Theme and Customisation Troubleshooting

API Documentation

Upgrade to v2.5 Fyne API v2.5 app canvas container data/binding data/validation dialog driver driver/desktop driver/mobile driver/software lang layout storage storage/repository test theme widget

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Fyne API "binding.ExternalFloatTree"

binding.ExternalFloatTree

import "fyne.io/fyne/v2/data/binding"

Usage

type ExternalFloatTree

type ExternalFloatTree interface {
	FloatTree

	Reload() error
}

ExternalFloatTree supports binding a tree of float64 values from an external variable.

Since:

2.4

func BindFloatTree

func BindFloatTree(ids *map[string][]string, v *map[string]float64) ExternalFloatTree

BindFloatTree returns a bound tree of float64 values, based on the contents of the passed values. The ids map specifies how each item relates to its parent (with id “”), with the values being in the v map. If your code changes the content of the maps this refers to you should call Reload() to inform the bindings.

Since:

2.4

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