Question

Im developing a .NET 2.0 application.  Currently, GTP.NET requires that my development PC have the 1.1 framework during its installation.  Will you have a .NET 2.0 only capability before the end of 2006?  I really dont want my customers to have to install two frameworks.

Answer

Yes we will have GTP.NET for .net 2.0 by that time

Question

Hi,
I am trying to evaluate Gantt chart control for use in few of our WEB projects.

I am glad to see that most of my requirements are fulfilled by GTP control. However there is one requirement to show details of Task in ToolTip for each of the timelines. I would like to know how to do it. A code snipped would help.

GridNode gn2 = gn.SubNodes.AddNode();
gn2.GetCell(0).Content.Value = dr[0];
TimeItem tj = GanttRow.FromGridNode(gn2).Layers[0].AddNewTimeItem();
tj.Start = DateTime.Parse(dt1.Rows[0][“mStatusValidFromDate”].ToString()).AddDays(5);
tj.Stop = tj.Start.AddMonths(6);
tj.TimeItemLayout = new TimeItemLayout();
tj.TimeItemLayout.Color = Color.Red;
tj.TimeItemLayout.TimeItemStyle = TimeItemStyle.Square;
tj.TimeItemLayout.TopInset = 20;
 tj.ToolTip = “My details”; //Is it possible to do something like this.

Answer

We have choosen to not include any special handling of tooltips in GTP.NET, instead we urge you to use the standard ToolTip control for .NET and bring it up in a event. This way you can also provide dynamic information and not only fixed texts.

A good example of this is in the Gantt_TimeItems sample in the general download. It goes like this :

    private void gantt1_OnTimeItem_Hoover(PlexityHide.GTP.Gantt aGantt, PlexityHide.GTP.TimeItemEventArgs e)
    {
      string newTooltipText="";
      if (e.TimeItem!=null)
      {
        newTooltipText="You are pointing at a time item that start "+e.TimeItem.Start.ToLongDateString();
       
        if (e.TimeItem.UserReference is BreakInfo)
          newTooltipText=newTooltipText+"\n The time item you are pointing on has a BreakInfo object in UserReference...";
      }
      else
      {
        newTooltipText="";
      }
     
      if (gantt1.MouseMoveKind==MouseMoveKind.move)
      {
        newTooltipText="You are moving a time item to the new date "+gantt1.FocusedTimeItem.Start.Add(e.Diff).ToLongDateString();
       
        if (!(gantt1.GanttRowFromPoint(new Point(e.x,e.y)) == gantt1.FocusedTimeItem.Layer.Layers.GanttRow))
        {
          newTooltipText="You are moving a time item to a different row";
          if (e.Diff.Days!=0)
           newTooltipText=newTooltipText+"\n and to the new date "+gantt1.FocusedTimeItem.Start.Add(e.Diff).ToLongDateString();
        }
      }
      else
      if (gantt1.MouseMoveKind==MouseMoveKind.resizew)
      {
        newTooltipText="You are changing the start time of a time item to the new date "+gantt1.FocusedTimeItem.Start.Add(e.Diff).ToLongDateString();
      }
      else
      if (gantt1.MouseMoveKind==MouseMoveKind.resizee)
      {
        newTooltipText="You are changing the stop time of a time item to the new date "+gantt1.FocusedTimeItem.Stop.Add(e.Diff).ToLongDateString();
      }
     
     
     
      if (toolTip1.GetToolTip(gantt1.TimeItemArea)!=newTooltipText)
        toolTip1.SetToolTip(gantt1.TimeItemArea,newTooltipText);

    }
This sample shows dynamic tooltips, but if you need Static, just add a string to the TimeItem.UserReference and pick it up in this event

Question

Answer

I see your point and this would be good functionality. Will make a note in the todo list. Currently you must do something like this: Create the cells that you want to combine as CustomCells, then when you draw the custom cell, you identify the other two cells (in the group of 3), find out their rectangels, find out if they are on screen etc; calculate a grid cell that is big enough to cover all three cells, then draw your data into this (with gdi commands).

Question

How would I add tooltips to time items and grid cells in the Gantt_ASP

Answer

In IE-html the title attribute of a tag is interperted as a tooltip so to add the tooltip to a grid cell you only change the text in it from “Hello” to “<span title=\”The hello tooltip\”>Hello</span>”…

And for a time item you would go like this:

    private void Gantt_ASP1_OnAreaAttributes(PlexityHide.GTP.WEB.Gantt_ASP aGantt, PlexityHide.GTP.WEB.AreaAttributeEventArgs e)
    {
      if (e.AreaKind==PlexityHide.GTP.WEB.AreaKind.TimeItem)
      {        
        e.Result=" Title=\"Tooltip for this time item\"  ";
      }

    }

In Ajax things has changed slightly:

This design is a bit more complex but a lot more flexible.< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
 
To get a very simple tooltip you can set the title property of an img element; but our problem was: How do we let the developer do this when the img is created in javascript at the client, but the text for the tooltip is most likely prepared at the server?
 
This is how we solved it:
We added a property that lets you inject javascript code into the code we generate:
1.       Gantt_ASP.ClientSideJavaScript_TimeItemInit
And we added an event that enables you to produce a string server side that will travel down to the client and can be used in the code you injected by using the property above
2.       Gantt_ASP1.OnTimeItemUserStringPrepare
 
So if you implement just like this:
  Gantt_ASP.ClientSideJavaScript_TimeItemInit = "aImgElement.title=aClientTimeItem.UserString;\r\n";
 
  void Gantt_ASP1_OnTimeItemUserStringPrepare(PlexityHide.GTP.WEB.Gantt_ASP aGantt, PlexityHide.GTP.WEB.TimeItemUserStringPrepareArgs e)
  {
    e.result="This time item starts st "+e.ti.Start.ToLongDateString();
  }
 
You get the simple tooltip on client side movable time items, and they work both in FireFox and IE