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Peter Markgren
400
Show editor buttons only when hot tracked or if the cell is in edit mode?
posted

Hi All,
I have multi column wintree, one of the columns in WinTree is having an embeded button.  To achieve this the below code is used,

EditorButtonBase editorButton = new EditorButton("Button");
EditorWithText editorText = new EditorWithText();
editorText.ButtonsRight.Add(editorButton);
nodeColumn.Editor = editorText;

This successfully displays the button in the column, however the button is displayed always and this gives the tree a messy feel (more so if there are 2 or more columns having buttons in them).    I have set ShowEditorButtons to ActiveAndHotTracked, but this dosent solve the problem. 
Please suggest how to display the button only when HotTracked or if a cell is active, any help on this will be greatly appreciated.

/spm

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  • 119
    posted

    SPM,

     I was able to solve this problem by setting the editor button as not visible until after the cell was put into edit mode.  It took a combination of settings to get this to work.  First, I set cells to allow full edit but set the Cellclickaction to only select the node.  Then, I used the Tree_MouseDown event to force entry into edit mode.(or to cancel edit if right mouse used to select context menu).  After that, it was a matter of setting value of editor control(PlacesTreeDD), and hiding control on close up.

    Here's some code:

    Private Sub SetTreeProperties()
         ' Make cells fully editable by default, but set cell click action to "SelectNodeOnly"
         Me.MyTree.ColumnSettings.AllowCellEdit = AllowCellEdit.Full
             Me.MyTree.Override.CellClickAction = CellClickAction.SelectNodeOnly

         (set other properties)

    End Sub

    Private Sub InitializePlaceColumn()

    ' Set form level reference to column
    colPlace = MyTree.ColumnSettings.RootColumnSet.Columns("Place")

    ' Wire up embedded text editor for place column and embedded dropdown button
    Dim utePlace As New UltraTextEditor
    Dim ddPlace As New DropDownEditorButton

    ' Approach: Using two different click objects in place column. First, there is a swatch
    ' image as "Left Image"(see SetCellVal, cellappearance.image = colorswatch). Second, there's
    ' a dropdown button which is not visible until after user clicks swatch image, which puts
    ' cell into edit mode. Event handler for clicking on swatch "In PlaceColumn_AfterEditMode"
    ' makes dropdown button visible, but cell size is too small, only swatch shows.

    ' Addhandler to respond to click of swatch in left image when cell not in edit mode
    AddHandler utePlace.BeforeEditorButtonDropDown, AddressOf PlaceColumn_DropDown

    ' Create ultratexteditor & dropdown button, add ddbutton to ute right buttons col, ute to column
    With ddPlace
       .ButtonStyle = UIElementButtonStyle.Flat
       .RightAlignDropDown = DefaultableBoolean.True
       .Control = PlacesColumnDD
       .Visible =     False
    End With

    utePlace.ButtonsRight.Add(ddPlace)
    colPlace.EditorControl = utePlace

    ' In edit mode, clicks on place swatch processed by embedded editorwith text
    Dim editorprovider As IProvidesEmbeddableEditor = DirectCast(utePlace, IProvidesEmbeddableEditor)
    Dim editor As EditorWithText = DirectCast(editorprovider.Editor, EditorWithText)
    AddHandler editor.BeforeEnterEditMode, AddressOf PlaceColumn_BeforeEnterEditMode
    AddHandler editor.AfterEnterEditMode, AddressOf PlaceColumn_AfterEnterEditMode
    AddHandler editor.AfterEditorButtonCloseUp, AddressOf PlaceColumn_AfterEditorButtonCloseUp

    End Sub

    Private Sub MyTree_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyTree.MouseDown

         Dim hittestnode As UltraTreeNode = Me.MyTree.GetNodeFromPoint(Me.MyTree.PointToClient(Me.MousePosition))
         If hittestnode Is Nothing Then Exit Sub

         ' Check for right click to get contextmenu
         If e.Button = MouseButtons.Right Then Exit Sub

         ' Get reference to cell under mouse position
             Dim cell As UltraTreeNodeCell = CellFromPoint(Me.MyTree, Me.MousePosition)
             If cell Is Nothing Then Exit Sub

         ' If over Place column, then begin edit of place column
             If cell.Key = "Place" Then cell.BeginEdit() : Exit Sub

         (other code for other columns)

    End Sub

    Private Sub PlaceColumn_BeforeEnterEditMode(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)
             ' This allows use of context menu when in edit mode.  This or Tree_Mousedown may be redundant?
         Dim ewc As EditorWithText = DirectCast(sender, EditorWithText)
         If ewc.TextBox.MouseButtons = MouseButtons.Right Then ewc.ExitEditMode(True, False)
    End Sub

    Private Sub PlaceColumn_AfterEnterEditMode(ByVal sender As Object, ByVal e As EventArgs)
         Dim ewc As EditorWithText = DirectCast(sender, EditorWithText)
         Dim ddeb As DropDownEditorButton = DirectCast(ewc.ButtonsRight(0), DropDownEditorButton)

         ddeb.Visible = True

         ddeb.DropDown()

    End Sub

    Private Sub PlaceColumn_DropDown(ByVal sender As Object, ByVal e As BeforeEditorButtonDropDownEventArgs)
         Dim cell As UltraTreeNodeCell = MyTree.ActiveCell

         If Not cell Is Nothing AndAlso Not cell.Value Is Nothing Then
             Pl    acesColumnDD.CurrentPlaceID = cell.Value.ToString
         End     If
    End Sub

    Private Sub PlaceColumn_AfterEditorButtonCloseUp(ByVal sender As Object, ByVal e As EditorButtonEventArgs)
         Dim ewc As EditorWithText = DirectCast(sender, EditorWithText)
         Dim ddeb As DropDownEditorButton = DirectCast(ewc.ButtonsRight(0), DropDownEditorButton)

         ' Hide dropdown button
             ddeb.Visible = False

         ' Exit editmode for the editor
             ewc.ExitEditMode(True, True)

         ' Set active cell to nothing so back to selecting entire node
             Me.MyTree.ActiveCell =     Nothing
    End Sub

    JC

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