ParameterPage textfield initalization / Chart aggregation

kermitisgr

Hello,
I am new to birt (2.3.2) and have a two questions:

First i'd like to ask whether it somehow possible to initalize textfield reportparameters in the reportpage without passing their value in the url? i want to have two textfields in the parameter page ('from' and 'to' date) and have them initalised with the first day of the quarter and the current day. I can't connect to a datasource with a textfield and the textfield only has a validate() event. I am deploying BIRT as ear and use the webviewer.

Next, I try to create a very simple pie chart on following data:

ID VALUE
1 23
2 45
3 34
4 76
5 45
6 86
7 3
8 1
9 8
10 4

Now i want to aggregate those values in 2 groups with an interval of 50 which works - the chart show the correct values, however, the labels show some arbitrary numbers from the csv file. how can i make them display like '1-50' and '51-100'? is this possible without scripting?

Best regards & thanks,
Gerhard