On Friday, March 2, 2012 10:10:13 AM UTC+1, Magallo wrote:
>
> I have a very similar problem. I have a DataGrid and when I load data from
> an RPC I want to show the loading indicator on the grid and when the data
> are loaded I wanted to show them. I initialize the datagrid with;
>
> myDataGrid.setLoadingIndicator(new Image(/*my ImageResource object*/);
>
> then during the program flow, just before making an async RPC, I would like
> to set the DataGrid in the state of 'Loading'
> so that the loading indicator is shown. Then, after the RPC returns I would
> like to set the DataGrid in the state of 'Loaded'
> to show the data rows. I tried with this:
>
> ....
> myDataGrid.fireEvent(new LoadingStateChangeEvent(LoadingState.LOADING));
> ....
> myDataGrid.fireEvent(new LoadingStateChangeEvent(LoadingState.LOADED));
> but nothing happens.
>
> I have also tried to call setVisibleRangeAndClearData but it doesn't work.
>
> I read from Thomas Broyer that "the loading indicator is shown only when
> the LoadingState is LOADING, and that one is set by the internal
> HasDataPresenter only when the known rowData is empty (and the rowCount is
> not 0)." What exactly does it mean? What is the 'known' rowData? I use a
> ListDataProvider to bind data to the DataGrid. Where am I wrong? What is
> the right way to set the 'Loading' state of the DataGrid?
>
> jgm: does you code did the trick? I think anyway it's just a little too
> tricky. I think that considering how the DataGrid (and CellTable also) is
> designed, I really think and hope there is a simple way. The support for
> this is not really good. I think google should explain better how to use
> these controls.
>
> Cheers.
>
> On Wednesday, February 1, 2012 3:26:10 PM UTC+1, jgm wrote:
>>
>> Hi,
>>
>> Thanks for your quick answer.
>>
>> We also in the meantime found out that ..
>>
>> private void clearTable() {
>> if (dataProvider.getDataDisplays() != null &&
>> dataProvider.getDataDisplays().isEmpty() == false) {
>> dataProvider.removeDataDisplay(cellTable);
>> }
>>
>> clearTableColumns();
>>
>> cellTable.setVisibleRangeAndClearData(cellTable.getVisibleRange(),
>>
>> true);
>> cellTable.setLoadingIndicator(imageProcessing);
>> }
>>
>> did the trick !
>>
>> On 1 Feb., 14:44, Thomas Broyer <[email protected]> wrote:
>> > AFAICT, CellTable shows the loading indicator only when the
>> LoadingState is
>> > LOADING, and that one is set by the internal HasDataPresenter only when
>> the
>> > known rowData is empty (and the rowCount is not 0). So I think you need
>> to
>> > call setVisibleRangeAndClearData().
>
>
> On Wednesday, February 1, 2012 3:26:10 PM UTC+1, jgm wrote:
>>
>> Hi,
>>
>> Thanks for your quick answer.
>>
>> We also in the meantime found out that ..
>>
>> private void clearTable() {
>> if (dataProvider.getDataDisplays() != null &&
>> dataProvider.getDataDisplays().isEmpty() == false) {
>> dataProvider.removeDataDisplay(cellTable);
>> }
>>
>> clearTableColumns();
>>
>> cellTable.setVisibleRangeAndClearData(cellTable.getVisibleRange(),
>>
>> true);
>> cellTable.setLoadingIndicator(imageProcessing);
>> }
>>
>> did the trick !
>>
>> On 1 Feb., 14:44, Thomas Broyer <[email protected]> wrote:
>> > AFAICT, CellTable shows the loading indicator only when the
>> LoadingState is
>> > LOADING, and that one is set by the internal HasDataPresenter only when
>> the
>> > known rowData is empty (and the rowCount is not 0). So I think you need
>> to
>> > call setVisibleRangeAndClearData().
>
>
> On Wednesday, February 1, 2012 3:26:10 PM UTC+1, jgm wrote:
>>
>> Hi,
>>
>> Thanks for your quick answer.
>>
>> We also in the meantime found out that ..
>>
>> private void clearTable() {
>> if (dataProvider.getDataDisplays() != null &&
>> dataProvider.getDataDisplays().isEmpty() == false) {
>> dataProvider.removeDataDisplay(cellTable);
>> }
>>
>> clearTableColumns();
>>
>> cellTable.setVisibleRangeAndClearData(cellTable.getVisibleRange(),
>>
>> true);
>> cellTable.setLoadingIndicator(imageProcessing);
>> }
>>
>> did the trick !
>>
>> On 1 Feb., 14:44, Thomas Broyer <[email protected]> wrote:
>> > AFAICT, CellTable shows the loading indicator only when the
>> LoadingState is
>> > LOADING, and that one is set by the internal HasDataPresenter only when
>> the
>> > known rowData is empty (and the rowCount is not 0). So I think you need
>> to
>> > call setVisibleRangeAndClearData().
>
>
> On Wednesday, February 1, 2012 3:26:10 PM UTC+1, jgm wrote:
>>
>> Hi,
>>
>> Thanks for your quick answer.
>>
>> We also in the meantime found out that ..
>>
>> private void clearTable() {
>> if (dataProvider.getDataDisplays() != null &&
>> dataProvider.getDataDisplays().isEmpty() == false) {
>> dataProvider.removeDataDisplay(cellTable);
>> }
>>
>> clearTableColumns();
>>
>> cellTable.setVisibleRangeAndClearData(cellTable.getVisibleRange(),
>>
>> true);
>> cellTable.setLoadingIndicator(imageProcessing);
>> }
>>
>> did the trick !
>>
>> On 1 Feb., 14:44, Thomas Broyer <[email protected]> wrote:
>> > AFAICT, CellTable shows the loading indicator only when the
>> LoadingState is
>> > LOADING, and that one is set by the internal HasDataPresenter only when
>> the
>> > known rowData is empty (and the rowCount is not 0). So I think you need
>> to
>> > call setVisibleRangeAndClearData().
>
>
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