mirror of https://github.com/rivo/tview.git
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
// Demo code for the TreeView primitive.
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package main
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import (
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"io/ioutil"
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"path/filepath"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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)
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// Show a navigable tree view of the current directory.
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func main() {
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rootDir := "."
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root := tview.NewTreeNode(rootDir).
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SetColor(tcell.ColorRed)
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tree := tview.NewTreeView().
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SetRoot(root).
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SetCurrentNode(root)
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// A helper function which adds the files and directories of the given path
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// to the given target node.
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add := func(target *tview.TreeNode, path string) {
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files, err := ioutil.ReadDir(path)
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if err != nil {
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panic(err)
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}
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for _, file := range files {
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node := tview.NewTreeNode(file.Name()).
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SetReference(filepath.Join(path, file.Name())).
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SetSelectable(file.IsDir())
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if file.IsDir() {
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node.SetColor(tcell.ColorGreen)
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}
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target.AddChild(node)
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}
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}
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// Add the current directory to the root node.
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add(root, rootDir)
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// If a directory was selected, open it.
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tree.SetSelectedFunc(func(node *tview.TreeNode) {
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reference := node.GetReference()
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if reference == nil {
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return // Selecting the root node does nothing.
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}
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children := node.GetChildren()
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if len(children) == 0 {
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// Load and show files in this directory.
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path := reference.(string)
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add(node, path)
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} else {
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// Collapse if visible, expand if collapsed.
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node.SetExpanded(!node.IsExpanded())
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}
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})
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if err := tview.NewApplication().SetRoot(tree, true).EnableMouse(true).Run(); err != nil {
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panic(err)
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}
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}
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