class Menu {
#region Params
[int] $Left = 4
[int] $Top = 2
[int] $Width = 30
[int] $Height = 200
[int] $Current = 0
[int] $ViewStart = 0
[Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [string[]] $Items
$Selected = [System.Collections.Generic.List[int]]::new()
#$Background = [ConsoleColor]::Black
$Foreground = [ConsoleColor]::Gray
#$CurrentBackground = [ConsoleColor]::DarkGray
$CurrentForeground = [ConsoleColor]::White
#$SelectedBackground = [ConsoleColor]::DarkBlue
$SelectedForeground = [ConsoleColor]::Yellow
hidden [bool] $CanContinue = $true
hidden [bool] $BackupCursorVisible = [Console]::CursorVisible
#endregion
Menu() {}
Menu ([string[]] $items) { $this.Items = $items }
[System.Collections.Generic.List[int]] Run() {
[Console]::CursorVisible = $false
while ($this.CanContinue) {
$this.Draw()
[ConsoleKeyInfo] $keyInfo = [Console]::ReadKey($true)
switch ($keyInfo.Key) {
([ConsoleKey]::UpArrow) { $this.MoveUp(); break }
([ConsoleKey]::DownArrow) { $this.MoveDown(); break }
([ConsoleKey]::Spacebar) { $this.Select(); break }
([ConsoleKey]::Enter) { $this.Finish(); break }
([ConsoleKey]::Escape) { $this.Cancel(); break }
}
}
[Console]::ResetColor()
[Console]::CursorVisible = $this.BackupCursorVisible
return $this.Selected
}
[void] Cancel() {
$this.Selected.Clear();
$this.CanContinue = $false
}
[void] Finish() {
if ($this.Selected.Count -gt 0) {
$this.CanContinue = $false
}
}
[void] Select() {
if ($this.Selected -Contains $this.Current) {
$this.Selected.Remove($this.Current)
} else {
$this.Selected.Add($this.Current)
}
}
[void] MoveDown() {
if ($this.Current -lt ($this.Items.Count - 1)) {
$this.Current++
}
if ($this.Current -ge $this.Height -and $this.ViewStart -lt ($this.Items.Count - $this.Height)) {
$this.ViewStart++
}
}
[void] MoveUp() {
if ($this.Current -gt 0) {
$this.Current--
}
if ($this.Current -lt ($this.Items.Length - $this.Height) -and $this.ViewStart -gt 0) {
$this.ViewStart--
}
}
[void] Draw() {
if ($this.Items.Count -gt $this.Height) {
$h = $this.Height
} else {
$h = $this.Items.Count
}
for ([int] $i = 0; $i -lt $h; $i++) {
[Console]::SetCursorPosition($this.Left, $this.Top + $i)
#[Console]::BackgroundColor = $this.Background
[Console]::ForegroundColor = $this.Foreground
[string] $item = $this.Items[$this.ViewStart + $i]
[string] $checkbox = "[ ] "
[string] $cursor = " "
[string] $spaces = ""
[int] $lineLength = $item.Length + $checkbox.Length + $cursor.Length
[int] $spacesCount = $this.Width - $lineLength
if ($this.Selected -Contains ($this.ViewStart + $i)) {
#[Console]::BackgroundColor = $this.SelectedBackground
[Console]::ForegroundColor = $this.SelectedForeground
$checkbox = " "
}
if ($this.ViewStart + $i -eq $this.Current) {
#[Console]::BackgroundColor = $this.CurrentBackground
[Console]::ForegroundColor = $this.CurrentForeground
$cursor = "> "
}
if ($lineLength -lt $this.Width) {
$spaces = [string]::new(' ', $spacesCount)
}
if ($lineLength -gt $this.Width) {
[int] $w = $this.Width - $checkbox.Length - $cursor.Length
$item = $item.Substring(0, $w)
}
[Console]::Writeline($checkbox + $cursor + $item + $spaces)
}
}
}
function Menu-Demo {
cls
[Console]::WriteLine("Демка, только вывод, что Вы выбрали (мультивыбор). Текущий каталог: $PWD")
[Console]::WriteLine("Стрелки вверх/вниз - перемещение; Spacebar - выбор; Enter - завершить выбор; ESC - отмена")
$Items = Get-ChildItem $PWD
$menu = [Menu]@{
Items = $Items
Top = 3
}
$menu.Width = ([Console]::WindowWidth - $menu.Left)
if ($null -eq $menu) { throw $Error[0] }
$result = $menu.Run()
if ($result.Count -gt 0) {
[Console]::Write("`nВы выбрали (индекс): ")
[Console]::Write(($result -join "; "))
[Console]::Write("`nВы выбрали: ")
@(foreach ($i in $result) { $Items[$i] }) -join "; "
}
# cls
pause
}
Menu-Demo |
