SftTree/OCX 7.5 - ActiveX Tree Control

WidthPix Property, SftTreeColumn Object

Defines the width of this column.

Syntax

Get

Put

object

A SftTreeColumn object.

WPix

Defines the width of this column in pixels.

Comments

The WidthPix property defines the width of this column.

The Column.Width and WidthPix properties are synonyms, but may use different coordinate systems.

The column width must be greater or equal to the column's minimum width. The minimum width can be defined using the Column.MinWidth property.

The last column in a tree control may be defined as an open-ended column (see ColumnsObj.OpenEnded). An open-ended column cannot be resized, because an open-ended column doesn't have a defined width. An open-ended column will always use the space remaining between the previous column and the right edge of the tree control window.

Due to the variable number of levels and the resulting hierarchical display, the width of the first column is always treated as a minimum width. The text portion of the first column will always be at least of the specified width, no matter what level the item is on. This can result in the first column being much wider than the defined width. To calculate the actual width of column 0, add the value returned by the ColumnsObj.OverheadWidth property to the value returned by Column(0).WidthPix.

When changing column widths, the Items.RecalcHorizontalExtent method may have to be used to recalculate the optimal horizontal scrolling extent.

The Column.OptimalWidth or Column.MakeOptimal methods can be used to calculate or define the optimal width for a column. An optimal width allows all text and graphic components in a column to be displayed in their entirety, without being clipped.

Examples

VB.NET

        End If
    End Sub

    Private Sub AxSftTree1_OLEDragDrop(ByVal sender As Object, ByVal e As AxSftTreeLib75._DSftTreeEvents_OLEDragDropEvent) Handles AxSftTree1.OLEDragDrop
        ' get horizontal extent and width of column 0
        Dim horzExtent As Integer
        horzExtent = AxSftTree1.Items.HorizontalExtentPix
        Dim firstColumnWidth As Integer
        firstColumnWidth = AxSftTree1.get_Column(0).WidthPix

        Dim insertAt As Integer
        insertAt = AxSftTree1.Items.DropHighlight
        If insertAt < 0 Then Exit Sub
        If e.data.GetFormat(SftOLEClipboardConstants.sftCFText) Then
            Dim lvl As Integer
            lvl = AxSftTree1.get_Item(insertAt).Level

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C#

                DropTargetPic.Image = (Image) o;
            }
        }

        private void axSftTree1_OLEDragDrop(object sender, AxSftTreeLib75._DSftTreeEvents_OLEDragDropEvent e) {

            // get horizontal extent and width of column 0
            int horzExtent = axSftTree1.Items.HorizontalExtentPix;
            int firstColumnWidth = axSftTree1.get_Column(0).WidthPix;

            int insertAt = axSftTree1.Items.DropHighlight;
            if (insertAt < 0) return;
            if (e.data.GetFormat((short) SftOLEClipboardConstants.sftCFText)) {
                short lvl = axSftTree1.get_Item(insertAt).Level;
                string str = (string) e.data.GetData(SftOLEClipboardConstants.sftCFText);
                int newItem = axSftTree1.Items.Insert(insertAt + 1, str);

View Entire Sample Code

C++

void CDragDropDlg::OnOLEDragDropSftTree(LPDISPATCH FAR* Data, long FAR* Effect, short FAR* Button, short FAR* Shift, float FAR* x, float FAR* y)
{
    IVDMDataObjectPtr pDataObject = *Data;
    ASSERT(pDataObject != NULL);

    // get horizontal extent and width of column 0
    long horzExtent = m_vTree->Items->HorizontalExtentPix;
    long col0Width = m_vTree->Column[0]->WidthPix;

    long insertAt = m_vTree->Items->DropHighlight;
    if (insertAt < 0) return;

    if (pDataObject->GetFormat(sftCFText) != VARIANT_FALSE) {
        int lvl = m_vTree->Item[insertAt]->Level;
        _variant_t object = pDataObject->GetData((short)sftCFText);
        _bstr_t astring = object;

View Entire Sample Code

See Also SftTreeColumn Object | Object Hierarchy