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Added SetDoneFunc() to TreeView. Resolves #394

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This commit is contained in:
Oliver 2020-01-25 13:36:38 +01:00
parent 1316ea7a4b
commit f15d087aa0
1 changed files with 17 additions and 2 deletions
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19
treeview.go
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@ -277,6 +277,10 @@ type TreeView struct {
// An optional function which is called when a tree item was selected.
selected func(node *TreeNode)
// An optional function which is called when the user moves away from this
// primitive.
done func(key tcell.Key)
// The visible nodes, top-down, as set by process().
nodes []*TreeNode
}
@ -375,6 +379,13 @@ func (t *TreeView) SetSelectedFunc(handler func(node *TreeNode)) *TreeView {
return t
}
// SetDoneFunc sets a handler which is called whenever the user presses the
// Escape, Tab, or Backtab key.
func (t *TreeView) SetDoneFunc(handler func(key tcell.Key)) *TreeView {
t.done = handler
return t
}
// GetScrollOffset returns the number of node rows that were skipped at the top
// of the tree view. Note that when the user navigates the tree view, this value
// is only updated after the tree view has been redrawn.
@ -679,9 +690,13 @@ func (t *TreeView) InputHandler() func(event *tcell.EventKey, setFocus func(p Pr
// Because the tree is flattened into a list only at drawing time, we also
// postpone the (selection) movement to drawing time.
switch key := event.Key(); key {
case tcell.KeyTab, tcell.KeyDown, tcell.KeyRight:
case tcell.KeyTab, tcell.KeyBacktab, tcell.KeyEscape:
if t.done != nil {
t.done(key)
}
case tcell.KeyDown, tcell.KeyRight:
t.movement = treeDown
case tcell.KeyBacktab, tcell.KeyUp, tcell.KeyLeft:
case tcell.KeyUp, tcell.KeyLeft:
t.movement = treeUp
case tcell.KeyHome:
t.movement = treeHome