OK, so I'm making a custom type of table which manages a datastore,
has expandable sections, etc.
I've borrowed a couple of things off FlexTable, but modified/
simplified them.
When I run the project, I get this:
==========
[ERROR] Failed to create an instance of 'vdc.module.billing.Billing'
via deferred binding
java.lang.NullPointerException: null
at com.google.gwt.user.client.ui.HTMLTable$CellFormatter.access$0
(HTMLTable.java:373)
at com.google.gwt.user.client.ui.HTMLTable.cleanCell(HTMLTable.java:
1370)
at com.google.gwt.user.client.ui.HTMLTable.setHTML(HTMLTable.java:
1006)
at vdc.module.billing.clients.invoices.widget.InvoiceGrid.<init>
(InvoiceGrid.java:18)
at vdc.module.billing.clients.invoices.Invoices.makeInvoiceGrid
(Invoices.java:169)
at vdc.module.billing.clients.invoices.Invoices.<init>(Invoices.java:
110)
at vdc.module.billing.clients.Clients.<init>(Clients.java:66)
at vdc.module.billing.Billing.<init>(Billing.java:43)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance
(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate
(ModuleSpace.java:373)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:318)
at com.google.gwt.dev.shell.BrowserWidget.attachModuleSpace
(BrowserWidget.java:343)
at com.google.gwt.dev.shell.moz.BrowserWidgetMoz.access$100
(BrowserWidgetMoz.java:35)
at com.google.gwt.dev.shell.moz.BrowserWidgetMoz
$ExternalObjectImpl.gwtOnLoad(BrowserWidgetMoz.java:58)
at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native
Method)
at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:
1428)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2840)
at com.google.gwt.dev.SwtHostedModeBase.processEvents
(SwtHostedModeBase.java:235)
at com.google.gwt.dev.HostedModeBase.pumpEventLoop
(HostedModeBase.java:558)
at com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:405)
at com.google.gwt.dev.HostedMode.main(HostedMode.java:232)
==========
I compile the project out and run it in firefox, and pull up the error
here in the javascript:
==========
function $setHTML(this$static, row, column, html){
var td;
$prepareCell(this$static, row, column);
td = null.nullMethod();
$internalClearCell(this$static, td, html == null);
if (html != null) {
null.nullMethod();
}
}
==========
in particular this line:
td = null.nullMethod();
I've looked around, and can't find anything which really explains to
me what's going wrong.
Here are the methods that I've overwritten
==========
@Override
protected void prepareRow(int row) {
if (row < 0) {
throw new IndexOutOfBoundsException(
"Cannot create a row with a negative index: " + row);
}
int rowCount = getRowCount();
for (int i = rowCount; i <= row; i++) {
insertRow(i);
}
}
@Override
protected void prepareCell(int row, int column) {
prepareRow(row);
if (column < 0) {
throw new IndexOutOfBoundsException(
"Cannot create a column with a negative index: " +
column);
}
int cellCount = getCellCount(row);
for (int i = cellCount; i < column; i++) {
insertCell(row, i);
}
}
@Override
public int getCellCount(int row) {
if (row < 0) {
throw new IndexOutOfBoundsException(
"Cannot find a row with a negative index: " +
row);
}
// Initialize - 0 cells in a row
int count = 0;
// check if the row exists yet
int rows = getRowCount();
if (rows >= row) {
count = getDOMCellCount(row);
}
return count;
}
// and the constructor
public InvoiceGrid () {
// set the headers
setHTML(0,0," ");
setText(0,1,"Invoice Number");
setText(0,2,"Client Name");
setText(0,3,"Invoice Date");
setText(0,4,"Due Date");
setText(0,5,"Terms");
setText(0,6,"Ageing");
setText(0,7,"Amount");
setText(0,8,"Status");
}
==========
Can anyone help me with this? Any clues as to what I've done wrong
here?
Thanks guys.
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