The original data is populated just fine the grid. It's just that when I
update the value in the grid, things go wrong. I tried to put this line to
check if it's an instance of String:
Renderer renderer = new Renderer() {
public String render(Object value, CellMetadata
cellMetadata, Record record, int rowIndex, int colNum, Store store) {
NumberFormat nf = NumberFormat.getCurrencyFormat();
if ( nf.format(((Number) value).doubleValue())
instanceof String ) {
value = nf.format(((Number) value).doubleValue());
}
return value.toString(); // works fine
}
};
But the problem is that the code was stuck at the checking point:
if ( nf.format(((Number) value).doubleValue()) instanceof String ) {
It seems that the Number casting to the value variable makes the program go
crazy. But I really have no clue how I can fix it.
Many thanks for your help!
M.Y.
On Fri, Oct 9, 2009 at 11:22 AM, Patrizio De Michele <[email protected]>wrote:
> check if is an instance of number or instead is a string.....
>
>
> 2009/10/9 my600080 <[email protected]>
>
>
>> I tried to debug some more and here is what I found. The problem is in
>> the line chart renderer. Here is the original code from gwtext 2.0.6
>> sample LineChartSample.java code:
>>
>> Renderer renderer = new Renderer() {
>> public String render(Object value, CellMetadata
>> cellMetadata, Record record, int rowIndex, int colNum, Store store) {
>> NumberFormat nf = NumberFormat.getCurrencyFormat
>> ();
>> return nf.format(((Number) value).doubleValue());
>> }
>> };
>>
>> For this piece of code, if I update the value in the line chart data
>> grid, the value will not get updated and so the chart is not
>> refreshed.
>>
>> If I change the above as following:
>>
>> Renderer renderer = new Renderer() {
>> public String render(Object value, CellMetadata
>> cellMetadata, Record record, int rowIndex, int colNum, Store store) {
>> return value.toString();
>> }
>> };
>>
>>
>> Then the line chart data grid update works just fine (of course, it's
>> not formatted any more) and so the chart is refreshed correctly with
>> the new data.
>>
>> Do you know what the problem might be? Is it possible that I cannot
>> cast the value object inside the renderer?
>>
>> Your help is highly appreciated!
>>
>> M.Y.
>>
>> On Oct 7, 4:27 pm, my600080 <[email protected]> wrote:
>> > I'm using Eclipse Galileo, GWT 1.7 and GWT-EXT 2.0.6. I copied the
>> > Charts samples into my workspace. Everything works ok except that when
>> > I tried to update the values in the Grid for any of the charts, the
>> > change reverses back right away to the old value. Is this something
>> > that anyone else has experienced as well? Or is it just me? Thanks!
>> >
>> > M.Y.
>>
>>
>
> >
>
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