Imports System.ComponentModel
Imports DevExpress.XtraEditors
Imports DevExpress.XtraEditors.Controls
Imports DevExpress.XtraEditors.Repository

Public Class GridLookupEditExOLD
    Inherits GridLookUpEdit

    <Category("Einstellungen"), Description("Gibt an, ob mehrere Werte auswählbar sind"), DefaultValue(False)>
    Public Property MultiSelect As Boolean
    <Category("Einstellungen"), Description("Gibt an, ob neue Werte hinzugefügt werden können"), DefaultValue(False)>
    Public Property AllowAddNewValues As Boolean
    <Category("Einstellungen"), Description("Gibt an, ob das Hinzufügen von identischen Werten erlaubt ist"), DefaultValue(False)>
    Public Property PreventDuplicates As Boolean

    Public Property DataSource As DataTable

    Public Property SelectedValues As List(Of String)
        Get
            If _selectedValues Is Nothing Then
                Return New List(Of String)
            End If

            Return _selectedValues
        End Get
        Set(value As List(Of String))
            _selectedValues = value

            UpdateSelectedValues(value)
        End Set
    End Property

    Private _selectedValues As List(Of String)

    Private Const TAG_BUTTON_LOOKUP_FORM = "openLookupForm"
    Private Const TEXT_NO_RECORDS = "Keine Datensätze ausgewählt"
    Friend WithEvents fProperties As RepositoryItemGridLookUpEdit
    Friend WithEvents fPropertiesView As DevExpress.XtraGrid.Views.Grid.GridView
    Private Const TEXT_N_RECORDS = "{0} Datensätze ausgewählt"

    Public Sub New()
        Properties.View.OptionsBehavior.ReadOnly = True
        Properties.View.OptionsBehavior.Editable = False
        Properties.View.OptionsView.ShowColumnHeaders = False
        Properties.PopupFormSize = New System.Drawing.Size(Properties.PopupFormSize.Width, 100)

        ' If single select, remove dropdown button
        If MultiSelect = False Then
            Properties.Buttons.Clear()
        End If

        Properties.Buttons.Add(New EditorButton() With {
            .Kind = ButtonPredefines.Ellipsis,
            .Tag = TAG_BUTTON_LOOKUP_FORM
        })

    End Sub

    Private Function GetLookupForm() As frmLookupGrid
        Dim oForm As New frmLookupGrid() With {
            .MultiSelect = MultiSelect,
            .AddNewValues = AllowAddNewValues,
            .PreventDuplicates = PreventDuplicates,
            .DataSource = DataSource,
            .SelectedValues = SelectedValues,
            .StartPosition = Windows.Forms.FormStartPosition.Manual,
            .Location = PointToScreen(New System.Drawing.Point(Width, 0))
        }

        Return oForm
    End Function

    Private Sub UpdateSelectedValues(Values As List(Of String))
        If MultiSelect = True Then
            Properties.DataSource = Values
            Properties.NullText = IIf(Values.Count = 0, TEXT_NO_RECORDS, String.Format(TEXT_N_RECORDS, Values.Count))
        Else
            Text = Values.FirstOrDefault()
        End If
    End Sub

    Private Sub GridLookupEditEx_EditValueChanging(sender As Object, e As ChangingEventArgs) Handles Me.EditValueChanging
        If MultiSelect Then
            e.Cancel = True
        End If
    End Sub

    Private Sub lookupControlMulti_ButtonClick(sender As Object, e As ButtonPressedEventArgs)
        If e.Button.Tag <> TAG_BUTTON_LOOKUP_FORM Then
            Exit Sub
        End If

        Dim oForm As frmLookupGrid = GetLookupForm()
        Dim oResult = oForm.ShowDialog()

        If oResult = Windows.Forms.DialogResult.OK Then
            Dim oValues = oForm.SelectedValues

            UpdateSelectedValues(oValues)

            SelectedValues = oValues
        End If

        oForm.Dispose()
    End Sub

    Private Sub InitializeComponent()
        Me.fProperties = New DevExpress.XtraEditors.Repository.RepositoryItemGridLookUpEdit()
        Me.fPropertiesView = New DevExpress.XtraGrid.Views.Grid.GridView()
        CType(Me.fProperties, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.fPropertiesView, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'fProperties
        '
        Me.fProperties.Buttons.AddRange(New DevExpress.XtraEditors.Controls.EditorButton() {New DevExpress.XtraEditors.Controls.EditorButton(DevExpress.XtraEditors.Controls.ButtonPredefines.Combo)})
        Me.fProperties.Name = "fProperties"
        Me.fProperties.PopupView = Me.fPropertiesView
        '
        'fPropertiesView
        '
        Me.fPropertiesView.FocusRectStyle = DevExpress.XtraGrid.Views.Grid.DrawFocusRectStyle.RowFocus
        Me.fPropertiesView.Name = "fPropertiesView"
        Me.fPropertiesView.OptionsSelection.EnableAppearanceFocusedCell = False
        Me.fPropertiesView.OptionsView.ShowGroupPanel = False
        CType(Me.fProperties, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.fPropertiesView, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub
End Class