How to make CellTable Header always on top

[tong123123]

In my application, I have a scrollpanel and a celltable inside the scrollPanel, most of the column in the celltable is sortable, the problem is that when the record in the celltable is large and when the user scroll down, the celltable header will be hide. is it possible to make the celltable header always on top even we scroll down the content (in current situation, I feel it is impossible)?

currently, the header is created by

celltable.addColumn(column, "headername");

[Thomas Broyer]

That's what the DataGrid is for: http://gwt.google.com/samples/Showcase/Showcase.html#!CwDataGrid 

[Kei Kei]

When I change my application from using CellTable to DataGrid, then nothing can be shown on the result page!!
then I try to test the example in
http://google-web-toolkit.googlecode.com/svn/javadoc/2.4/com/google/gwt/user/cellview/client/DataGrid.html
with just very minor modification (as attahced as DataGridExample.java, just don't impelement entrypoint and use onLoad),
the data grid cannot be seen also.

So what is the problem?

[Kei Kei]

the data grid cannot be seen also (DataGrid.jpg).
Then I try to replace the DataGrid with CellTable, then the CellTable can be shown!! (as in attached useCellTable.jpg)

[Kei Kei]

I see the thread
https://groups.google.com/forum/?fromgroups#!topic/google-web-toolkit/PBhu6RtP4G8
and so I put the datagrid inside a scrollPanel (scrollPanel implements ProvidesResize) and I also set each column width (table.setColumnWidth(addressColumn, 7, Unit.EM);)
but still cannot show the datagrid, what happens?

[Thomas Broyer]

On Wednesday, May 30, 2012 8:40:12 AM UTC+2, tong123123 wrote:

I see the thread
https://groups.google.com/forum/?fromgroups#!topic/google-web-toolkit/PBhu6RtP4G8
and so I put the datagrid inside a scrollPanel (scrollPanel implements ProvidesResize) and I also set each column width (table.setColumnWidth(addressColumn, 7, Unit.EM);)
but still cannot show the datagrid, what happens?

ScrollPanel is also a RequiresResize, so it won't help. You have to give your DataGrid (or whatever RequiresResize+ProvidesResize parent) a size in pixels.

See https://developers.google.com/web-toolkit/doc/latest/DevGuideUiPanels#Resize (and don't miss the "Recipes" section!)

[Kei Kei]

I really get confused.
in my result page, the hierarchy of widget is DialogBox encloses TabLayoutPanel encloses FlexTable, the FlexTable has three rows.
in the first row, after I add a SimpleLayoutPanel with setSize("100%", "360px");
and then encloses the DataGrid inside SimpeLayoutPanel, the DataGrid can shown now.
But the problem is...SimpleLayoutPanel is also implements RequiresResize, so why can I just use "100%" but not an exact "px" unit?
The TabLayoutPanel has an explicit size in unit of px, then the FlexTable has setWidth("100%"), is this the cause so I can use just % in the enclosing SimpeLayoutPanel?
Also, I see DialogBox has not implements RequiresResize and ProvideResizes, so if the outer browser windows shrink, the DialogBox will not resize accordingly, this is expected, right?

On Wed, May 30, 2012 at 2:50 PM, Thomas Broyer <t.br...@gmail.com> wrote:

ScrollPanel is also a RequiresResize, so it won't help. You have to give your DataGrid (or whatever RequiresResize+ProvidesResize parent) a size in pixels.

See https://developers.google.com/web-toolkit/doc/latest/DevGuideUiPanels#Resize (and don't miss the "Recipes" section!)

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.

To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/PpPCjAW-Px0J.

To post to this group, send email to google-we...@googlegroups.com.
To unsubscribe from this group, send email to google-web-tool...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.