Question

I’m using the COM component and need help working with row heights and labels on a time object.  I’m using TimeItemsTextSetEx to display the text above the time item, but I’m having trouble determining how to resize the row height.  Here’s the code I’m using based on the GanttTest sample that installed with phGantt:

Private Sub LoadTreeItemsOwnedBy(activity As IphDataEntity_Tree2, ownerid As Integer) Dim newactivity As IphDataEntity_Tree2 Dim aRS As Recordset Dim selectstat As String Dim y As Long
   
    selectstat = “select id,name,owningactivity from activity where owningactivity=”
    selectstat = selectstat + Str(ownerid)
    Set aRS = New Recordset
    aRS.Open selectstat, db, adOpenStatic, adLockReadOnly
    While Not aRS.EOF
        If activity Is Nothing Then
            Set newactivity = phGantX1.AddRootDataEntityTree
        Else
            Set newactivity = phGantX1.AddDataEntityTree(activity)
        End If

        y = newactivity.GridRowIndex
        InitActivity newactivity, aRS
        LoadTreeItemsOwnedBy newactivity, newactivity.UserIntegerReference
        If y >= 0 Then
            phGantX1.SetRowHeightGrid y, phGantX1.GetRowHeightGrid(y)
        End If
        aRS.MoveNext
    Wend
End Sub

The problem is that y always evaluates to -1.  How do I resize the rows?  Thanks.

Answer

Not entirily sure why the y = newactivity.GridRowIndex is -1 in this case. Could be a couple of things… First; ary using the grid Gantt.UseGrid=true? If not the old tree is used and then no grid nodes will exist -> Set Gantt.UseGrid=true.
Second; It could be that you are in this load loop and that the Grid items get no chance to update them self. To verify if this is the case, loop thru the nodes in a button implementation and get GridRowIndex, if it is ok then its an update problem… Send us a sample, so we may debug and find out how to fix it.

Anyway, you can also control GridRowHeights by the defining a IphGridLayoutPropX, set its MinHeight property and assign it to at least one cell in the row (IphGantX3.SetGridCellLayoutPropIndex), and your row will get that row height (only works for UseGrid=true)

Question

Can we drill down on any bar in the gantt chart?

Answer

If the question is “Can we catch all possible events on a time item” the answer is yes. The term “drill down” implies that there is data “under” this time item, and there probably is, but that is up to you to decide what that data is. Our components merly offer you a clean way to make changes and presentation to the data you provide.

Question

We already implemented that TimeItems can only be dragged and dropped vertically: That is, when you drag it in a diagonal direction, then , the moves horizontally to the original position. Is it possible to freeze the its position already during the drag event?

Answer

In the phGantTimePackage this is not possible. This is due to the fact that you may want to allow for a time item being shifted horizontally when it is on the same row. (To fix this we would need to extend product with a callback method so that you can decide x and y coordinates during move, if you want to sponsor this development you should contact sales to get a cost estimate)

Question

I am wrestling with the parameters for printing the gantt chart.  I am trying to print on a 11 x 17 inch printer.  It prints in landscape mode correctly, but i want the image to take up the whole page.  Its stopping at about 7.5 inches horizontally.  Can u provide an example of how do to this?  Here is the code i am using:

LOCAL w as  long,h as long
w=0
h=0

thisform.gant1.printToDefault(1, 150, 5, 5,;
        thisform.gant1.treeWidth,;                          
        thisform.Gant1.TopItemTree, -1, .f., ;
        thisform.Gant1.Start , ;
        thisform.Gant1.Stop  ,; 
        thisform.gant1.getScaleLen,;
        thisform.gant1.scalerHeight, @w, @h)  

Answer

The Gantt works on pixels and you need to convert your inches from the printer to points or pixels. This is done by asking the printer for its resolution (this is standard windows but different in most environments).

Once you know how many pixels you want to fill you have two choices…
1. Use the available space in scale 1 to 1 that probably gives you very small time items on paper: To do this you would provide values for treewidth and ScaleLen that covers the available number of pixels.
or
2. Keeping the Treewidth and Scalelength more or less the same as on screen but calculate a scaling factor to use to fill the space: To do this you would go like this scale=PrinterPixelsInTheXDirection/(treeWidth+ScaleLen) and then use the scale in the PrintToDefault ( where you now use the value 5)

Question

It is not possible to set the CanEdit-Property of ” IphDataEntity_SchemaTime” to False. It is always True and therefore the Schematime can be moved every time?

Answer

If you implement this event IphSchemaX3.OnBeforeCanEditSchemaTime that is fired just before the edit starts on SchemaTime, you can set CanEdit=false on the SchemaTime in the argument, and stop editing.