| How to scroll a table to its end [message #458951] |
Wed, 27 July 2005 04:46  |
Eclipse User |
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Hello !
I want to scroll a table to its end after the user has added an item, so
that the user can see directly that the item has been added instead of
having to scroll the whole table down.
After looking in the API I found the setTopIndex(int index) method of
the Table class but it does not want I want : the last element is
sometimes "cut" because the table's height isn't exactly a multiple of
rows' height.
How can I solve that ? Is there a "setBottomIndex()" method hidden
somewhere ;) ?
Thanks ;) !
Vincent
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| Re: How to scroll a table to its end [message #458963 is a reply to message #458960] |
Wed, 27 July 2005 09:26  |
| Eclipse User |
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Vincent,
Which platform do you see this on? Do you have a snippet that shows it
happening? I did a quick experiment (snippet below) on win32, gtk and
motif, and could not get any of them to cut off the last item, even with
various Table heights. Using Table.setTopIndex() with a large value (eg.-
setTopIndex(table.getItemCount() - 1)) _should_ do what you want.
public class Main {
static int TABLE_HEIGHT = 195;
static int TABLE_ITEMCOUNT = 100;
public static void main(String[] args) {
Display display = new Display ();
final Shell shell = new Shell(display);
shell.setBounds(10,10,300,300);
final Table table = new Table(shell, SWT.NONE);
table.setBounds(10,10,200,TABLE_HEIGHT);
for (int i = 0; i < TABLE_ITEMCOUNT; i++) {
new TableItem (table, SWT.NONE).setText("item " + i);
}
shell.open();
shell.addListener(SWT.MouseDown, new Listener() {
public void handleEvent(Event event) {
TableItem lastItem = table.getItem(TABLE_ITEMCOUNT - 1);
table.showItem(lastItem);
//table.setTopIndex(TABLE_ITEMCOUNT - 1);
}
});
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
}
Grant
"Vincent Etter" <vincent.etter@gmail.com> wrote in message
news:dc80d6$tbf$1@news.eclipse.org...
> Yves Harms wrote:
> > Hi,
> > try mytable.getItem(table.getItemCount()-1).showItem()
> > or newItem.showItem() if you already have a reference to the new item.
> >
> > Yves
>
> Thanks for your answer ! The right code is :
>
> TableItem lastItem = myTable.getItem(restoreItemsTable.getItemCount() -
1);
> myTable.showItem(lastItem);
>
> But unfortunately the result is the same as with setTopIndex() : the
> last item is most of the time "cut" :(...
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| Re: How to scroll a table to its end [message #458971 is a reply to message #458968] |
Wed, 27 July 2005 10:53 |
| Eclipse User |
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Grant Gayed wrote:
> There's something strange happening with the TableEditor (just logged
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=105316 ), though I have not
> replicated your problem. If you have a stand-alone snippet that shows it
> happening then it would be easier to determine what's happening in your
> case.
>
> Grant
My problem is the same as the one you reported. The stand-alone snippet
I made shows the same than your screenshot in the bug report. Here it is :
public class Main {
static int TABLE_HEIGHT = 195;
static int TABLE_ITEMCOUNT = 100;
public static void main(String[] args) {
Display display = new Display ();
final Shell shell = new Shell(display);
shell.setBounds(10,10,300,300);
final Table table = new Table(shell, SWT.NONE);
table.setBounds(10,10,200,TABLE_HEIGHT);
new TableColumn(table, SWT.NONE).setWidth(75);
new TableColumn(table, SWT.NONE).setWidth(75);
for (int i = 0; i < TABLE_ITEMCOUNT; i++) {
TableItem item = new TableItem(table, SWT.NONE);
Label label = new Label(table, SWT.NONE);
label.setText("item " + i);
label.setBackground(Display.getCurrent().getSystemColor(SWT. COLOR_WHITE));
label.pack();
TableEditor editor = new TableEditor(table);
editor.grabHorizontal = true;
editor.grabVertical = true;
editor.setEditor(label, item, 0);
Button remove = new Button(table, SWT.PUSH);
remove.setText("Remove");
remove.pack();
editor = new TableEditor(table);
editor.minimumWidth = remove.getSize().x;
editor.setEditor(remove, item, 1);
table.getColumn(1).setWidth(remove.getSize().x + 5);
}
shell.open();
shell.addListener(SWT.MouseDown, new Listener() {
public void handleEvent(Event event) {
TableItem lastItem = table.getItem(TABLE_ITEMCOUNT - 1);
table.showItem(lastItem);
//table.setTopIndex(TABLE_ITEMCOUNT - 1);
}
});
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
}
Look at the labels : you can see that the scrollbar seems to scroll but
the content of the table does not move ! Screenshot :
http://img61.imageshack.us/img61/1639/screenshot20cg.jpg
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