Interfaces: Version 1.5.1
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Jonathan Jenne
238
Controls.LookupGrid/LookupControl3.vb
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238
Controls.LookupGrid/LookupControl3.vb
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Imports System.Drawing
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Imports System.ComponentModel
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Imports System.Windows.Forms
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Imports DevExpress.XtraEditors
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Imports DevExpress.XtraEditors.Repository
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Imports DevExpress.XtraEditors.Registrator
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Imports DevExpress.XtraEditors.ViewInfo
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Imports DevExpress.XtraEditors.Drawing
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Imports DevExpress.Accessibility
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Imports DevExpress.XtraEditors.Controls
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<ToolboxItem(True)>
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Public Class LookupControl3
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Inherits GridLookUpEdit
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Shared Sub New()
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RepositoryItemLookupControl3.RegisterLookupControl()
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End Sub
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Public Sub New()
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End Sub
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<DesignerSerializationVisibility(DesignerSerializationVisibility.Content)>
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Public Shadows ReadOnly Property Properties As RepositoryItemLookupControl3
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Get
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Return TryCast(MyBase.Properties, RepositoryItemLookupControl3)
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End Get
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End Property
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Public Overrides ReadOnly Property EditorTypeName As String
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Get
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Return RepositoryItemLookupControl3.CustomEditName
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End Get
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End Property
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End Class
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<UserRepositoryItem("RegisterLookupControl3")>
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Public Class RepositoryItemLookupControl3
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Inherits RepositoryItemGridLookUpEdit
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Shared Sub New()
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RegisterLookupControl()
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End Sub
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Private Const TAG_DROPDOWN = "openDropdown"
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Private Const TAG_BUTTON_LOOKUP_FORM = "openLookupForm"
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Private Const TEXT_NO_RECORDS = "Keine Datensätze ausgewählt"
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Private Const TEXT_ONE_RECORD = "Ein Datensatz ausgewählt"
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Private Const TEXT_N_RECORDS = "{0} Datensätze ausgewählt"
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Private _SelectedValues As New List(Of String)
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Private _MultiSelect As Boolean = False
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Private _ReadOnly As Boolean = False
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Public Const CustomEditName As String = "LookupControl3"
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Public Property AllowAddNewValues As Boolean
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Public Property PreventDuplicates As Boolean
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Public Overloads Property DataSource As DataTable
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Public Delegate Sub SelectedValuesChangedHandler(sender As Object, SelectedValues As List(Of String))
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Public Event SelectedValuesChanged As SelectedValuesChangedHandler
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Public Overrides ReadOnly Property EditorTypeName As String
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Get
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Return CustomEditName
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End Get
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End Property
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Public Overloads Property [ReadOnly] As Boolean
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Get
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Return _ReadOnly
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End Get
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Set(value As Boolean)
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SetFormButtonEnabled(Not value)
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_ReadOnly = value
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End Set
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End Property
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Public Property MultiSelect As Boolean
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Get
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Return _MultiSelect
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End Get
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Set(value As Boolean)
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SetDropdownButtonEnabled(value)
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_MultiSelect = value
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End Set
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End Property
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Public Property SelectedValues As List(Of String)
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Get
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Return _SelectedValues
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End Get
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Set(value As List(Of String))
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UpdateSelectedValues(value)
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End Set
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End Property
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Public Shared Sub RegisterLookupControl()
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Dim img As Image = Nothing
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Dim oClassInfo = New EditorClassInfo(
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CustomEditName,
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GetType(LookupControl3),
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GetType(RepositoryItemLookupControl3),
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GetType(GridLookUpEditBaseViewInfo),
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New ButtonEditPainter(),
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True,
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img,
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GetType(ButtonEditAccessible)
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)
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EditorRegistrationInfo.Default.Editors.Add(oClassInfo)
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End Sub
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Private Sub SetFormButtonEnabled(pVisible As Boolean)
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Dim oButton As EditorButton = Buttons.
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Where(Function(b) b.Tag = TAG_BUTTON_LOOKUP_FORM).
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FirstOrDefault()
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If oButton IsNot Nothing Then
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oButton.Visible = pVisible
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End If
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End Sub
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Private Sub SetDropdownButtonEnabled(pVisible As Boolean)
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Dim oButton As EditorButton = Buttons.
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Where(Function(b) b.Tag = TAG_DROPDOWN).
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FirstOrDefault()
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If oButton IsNot Nothing Then
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oButton.Visible = pVisible
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End If
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End Sub
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''' <summary>
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''' Prevents Editvalue changing when multiselect is true
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''' </summary>
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Private Sub HandleEditValueChanging(sender As Object, e As ChangingEventArgs)
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If MultiSelect Then
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e.Cancel = True
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End If
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End Sub
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Private Sub UpdateSelectedValues(Values As List(Of String))
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If Values Is Nothing OrElse Values.Count = 0 Then
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Exit Sub
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End If
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Values.RemoveAll(Function(v) String.IsNullOrEmpty(v))
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If MultiSelect = True Then
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' DataSource = Values
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Select Case Values.Count
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Case 0
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NullText = TEXT_NO_RECORDS
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Case 1
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NullText = TEXT_ONE_RECORD
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Case Else
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NullText = String.Format(TEXT_N_RECORDS, Values.Count)
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End Select
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Else
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NullText = Values.FirstOrDefault()
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OwnerEdit.Text = Values.FirstOrDefault()
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OwnerEdit.EditValue = Values.FirstOrDefault()
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End If
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_SelectedValues = Values
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RaiseEvent SelectedValuesChanged(Me, Values)
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End Sub
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Private Function GetLookupForm() As frmLookupGrid
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Dim oForm As New frmLookupGrid() With {
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.MultiSelect = MultiSelect,
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.AddNewValues = AllowAddNewValues,
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.PreventDuplicates = PreventDuplicates,
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.DataSource = DataSource,
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.SelectedValues = SelectedValues,
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.StartPosition = FormStartPosition.Manual,
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.Location = OwnerEdit.PointToScreen(New Point(OwnerEdit.Width, 0))
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}
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Return oForm
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End Function
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Protected Overrides Sub RaiseButtonClick(e As ButtonPressedEventArgs)
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Select Case e.Button.Tag
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Case TAG_BUTTON_LOOKUP_FORM
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Using oForm = GetLookupForm()
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Dim oResult = oForm.ShowDialog()
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If oResult = Windows.Forms.DialogResult.OK Then
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Dim oValues = oForm.SelectedValues
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UpdateSelectedValues(oValues)
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End If
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End Using
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Case Else
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MyBase.RaiseButtonClick(e)
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End Select
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End Sub
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Public Overrides Sub Assign(item As RepositoryItem)
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BeginUpdate()
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Try
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MyBase.Assign(item)
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Dim source As RepositoryItemLookupControl3 = TryCast(item, RepositoryItemLookupControl3)
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If source Is Nothing Then
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Return
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End If
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Finally
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EndUpdate()
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End Try
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End Sub
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Public Overrides Sub EndInit()
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MyBase.EndInit()
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Dim oLookupFormButton = New EditorButton() With {
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.Kind = ButtonPredefines.Search,
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.Tag = TAG_BUTTON_LOOKUP_FORM,
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.Width = 20
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}
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' Add button if it does not already exists
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If Buttons.Contains(oLookupFormButton) = False Then
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Buttons.Insert(0, oLookupFormButton)
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' Set the button which opens the dropdown
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ActionButtonIndex = 1
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End If
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End Sub
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Protected Overrides Sub RaiseQueryPopUp(e As CancelEventArgs)
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If MultiSelect = True Then
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MyBase.RaiseQueryPopUp(e)
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End If
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End Sub
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End Class
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