Wow seems you're doing this the really hard way..
Grid grid = new Grid(50, 4);
for (int row = 0; row < 50; row++)
{
for (int col = 0; col < 4; col++)
{
grid.setWidget(row, col, new Label(row + " x " + col));
}
}
On May 27, 2:28 am, csaba <[email protected]> wrote:
> Hello there,
>
> I'm guessing this is a simple problem, but I can't solve it for days
> and I don't know what else to do.
>
> i'm creating a new widget. I'm using the UiBinder with a HTMLPanel,
> and in this panel I've created a table. This table has around 50 rows
> and 4 columns. I need to have access to each cell to be able to set
> its content.
>
> So first I've tried with a simple approach: each cell contains a <span
> id="xxx"></span>. On the Java side, I initialize the widget with
> initWidget(uiBinder.createAndBindUi(this)); and then set the content
> of each span with
>
> RootPanel.get("xxx").add(new Label("xxx"));
>
> The problem was that RootPanel.get("xxx") will always return null. I
> was thinking that this is because the widget hasn't yet been added to
> its parent component (at that point), so the xxx field hasn't been
> attached to the DOM tree.
>
> I've tried a different approach. First I've added the widget, and then
> I called something like an initInternalComponents() method, which did
> the RootPanel.get("xxx") thing. In this case, I got an exception "A
> widget that has an existing parent widget may not be added to the
> detach list"
>
> After several hours of trying to fix this, I gave up and tried another
> approach.
>
> I replaced all the <span> tags with <g:Label ui:field="xxx"/>. On the
> Java side, I declared all 200+ components as a @UiField Label xxx.
> This did work.
>
> The problem now is how to access each field. Let's say I want to set
> the text of the cell in row 35, column 2. In that case, I'd have a
> label with the name field35by2 declared as an @UiField. What I was
> thinking of doing is using reflection:
>
> getClass().getField("field"+row+"by"+column).get(this)
>
> This would actually work in a normal Java application, but GWT doesn't
> support reflection, so now I'm back to where I've started 2 days ago.
>
> So can anyone help me how to solve this problem? I've tried a table
> component but it wasn't what I wanted, it restricted me too much in
> accessing a specific cell, or adding random components to different
> cells (in the end, I'd also have TextFields, Buttons, ListBoxes in
> this tables).
>
> An ideal solution would be to have
> Table table = new Table();
> for (int row=0; row<50; row++) {
> table.newRow();
> for (int col=0; col<50; col++) {
> Cell cell = table.newCell();
> cell.add( new Label("xxx" ) );
> }
>
> }
>
> and after that, I'd just do table.getCell(35, 2).getWidget() to obtain
> the Label or whatever.
>
> How to do this?
>
> Thanks in advance for any help!
> Csaba
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