121 lines
4.6 KiB
VB.net
121 lines
4.6 KiB
VB.net
Imports DevExpress.XtraGrid
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Imports DevExpress.XtraGrid.Views.Grid
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Imports DevExpress.XtraGrid.Views.Grid.ViewInfo
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Imports DigitalData.Modules.Logging
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Imports DigitalData.Modules.Base
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Imports DigitalData.GUIs.Common
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Public Class ClassDragDrop
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Inherits BaseClass
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Public Enum ResultType
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PrimaryKey
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RowHandle
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End Enum
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Private downHitInfo As GridHitInfo = Nothing
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Private SelectedResultType As ResultType
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Public Sub New(LogConfig As LogConfig)
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MyBase.New(LogConfig)
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SelectedResultType = ResultType.PrimaryKey
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End Sub
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Public Sub New(LogConfig As LogConfig, pResultType As ResultType)
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MyBase.New(LogConfig)
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SelectedResultType = pResultType
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End Sub
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Public Sub AddGridView(view As GridView)
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AddHandler view.MouseDown, AddressOf View_MouseDown
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AddHandler view.MouseMove, AddressOf View_MouseMove
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AddHandler view.GridControl.DragOver, AddressOf GridControl_DragOver
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End Sub
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Private Sub View_MouseDown(sender As Object, e As MouseEventArgs)
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Dim view As GridView = sender
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downHitInfo = Nothing
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Dim hitInfo As GridHitInfo = view.CalcHitInfo(New Point(e.X, e.Y))
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If Control.ModifierKeys <> Keys.None Then
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Return
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End If
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If e.Button = MouseButtons.Left And hitInfo.RowHandle >= 0 Then
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downHitInfo = hitInfo
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End If
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End Sub
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Private Sub View_MouseMove(sender As Object, e As MouseEventArgs)
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Try
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Dim view As GridView = sender
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Dim hitInfo As GridHitInfo = view.CalcHitInfo(New Point(e.X, e.Y))
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If e.Button = MouseButtons.Left And Not IsNothing(downHitInfo) Then
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Dim dragSize As Size = SystemInformation.DragSize
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Dim dragRect As New Rectangle(New Point(downHitInfo.HitPoint.X - dragSize.Width / 2, downHitInfo.HitPoint.Y - dragSize.Height / 2), dragSize)
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' DragRect ist ein kleines Rechteck, dessen Mitte der Punkt ist, wo die Maus geklickt wurde.
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' Es soll verhindern, dass durch schnelles Klicken unbeabsichtigt Drag'n'Drop Operationen initiiert werden
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' Siehe: https://msdn.microsoft.com/en-us/library/system.windows.forms.systeminformation.dragsize(v=vs.110).aspx
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If Not dragRect.Contains(New Point(e.X, e.Y)) Then
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' dragDropData enhält eine einzelne Row oder den kompletten View,
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' jenachdem, wie die Drag'n'Drop Operation gestartet wurde.
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Dim dragDropData As String
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' Wenn keine Zeile markiert ist
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If downHitInfo.RowHandle < 0 Then
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Exit Sub
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End If
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' Wenn zwar eine Zeile markiert ist, aber keine über die Checkbox angehakt wurde,
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' wird die markierte Zeile übergeben.
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' Wenn 1 oder n Zeilen über die Checkbox angehakt wurde, werden diese übergeben
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Dim row As DataRow = view.GetDataRow(downHitInfo.RowHandle)
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Dim source As String = view.GridControl.Name
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If Not IsNothing(row) Then
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Try
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Dim oKey As String
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Select Case SelectedResultType
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Case ResultType.RowHandle
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oKey = downHitInfo.RowHandle
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Case Else
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oKey = row.Item("GUID")
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End Select
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dragDropData = $"{oKey}|{source}"
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view.GridControl.DoDragDrop(dragDropData, DragDropEffects.Move)
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downHitInfo = Nothing
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DevExpress.Utils.DXMouseEventArgs.GetMouseArgs(e).Handled = True
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Catch ex As Exception
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Logger.Error(ex)
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End Try
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End If
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End If
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End If
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Catch ex As Exception
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Logger.Error(ex)
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MsgBox(ex.Message, MsgBoxStyle.Critical, "View_MouseMove")
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End Try
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End Sub
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Private Sub GridControl_DragOver(sender As Object, e As DragEventArgs)
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If e.Data.GetDataPresent(DataFormats.Text) Then
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Dim data As String = e.Data.GetData(DataFormats.Text)
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Dim source = data.Split("|")(1)
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Dim grid As GridControl = sender
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If grid.Name <> source Then
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e.Effect = DragDropEffects.Move
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End If
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Else
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e.Effect = DragDropEffects.None
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End If
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End Sub
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End Class
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