MultiselectionModel

[Thomas Frisch]

Hi,

I have a cell table with a column that contains a checkbox. Now I would like to add a 'select all box' that when selected all other checkboxes in the cell table are selected. I tried to use a MultiselectionModel for that. When I add the select all check box as a footer it does not work at all only when I add it as the header widget it 'kinda' works. Here is how I use it:

MultiselectionModel<Object> msm = new MultiSelectionModel<Object>();

table.setSelectionModel(msm, DefaultSelectionEventManager.<Object> createCheckboxManager()); 

Header<Boolean> selectAllHeader = new Header<Boolean>(new CheckboxCell()) {

                                @Override

public Boolean getValue() {

return msm.getSelectedSet().size() == table.getRowCount();

}

};

selectAllHeader.setUpdater(new ValueUpdater<Boolean>() {

@Override

public void update(Boolean value) {

for (Object msg : table.getVisibleItems()) {

msm.setSelected(msg, value);

}

}

});

Column<Object, Boolean> select = new Column<Object, Boolean>(new CheckboxCell()) {

@Override

public Boolean getValue(Object object) {

return msm.isSelected(object);

}

};

select.setFieldUpdater(new FieldUpdater<Object, Boolean>() {

public void update(int index, Object object, Boolean value) {

msm.setSelected(object, value);

}

});

Header<String> colHeader = new Header<String>(new TextCell()) {

     @Override

     public String getValue() {

         return "HEADER";

     }

};

//when adding like this does select all does not work

table.addColumn(select, colHeader, selectAllHeader);

//when adding the select all check box as header it 'kinda' works

table.addColumn(select, selectAllHeader);

With kinda works I mean the following:

- Click on Check-all box -> everything is selected but check-all box is not selected (NOT OK)

- Click on check-all box again -> everything still selected and now also check-all box selected (OK)

- Click on check-all box again -> nothing is selected but check-all box is still selected (NOT OK)

- Click on check-all box again -> nothing is selected and now also check-all box is not selected (OK)

Please can anyone help me??

[Thomas Broyer]

See https://code.google.com/p/google-web-toolkit/issues/detail?id=7014#c6

You have to use "new CheckboxCell(true, false)".

[Thomas Frisch]

I added the selectAllBox with new CheckboxCell(true, false)

and it worked but still when I add this Checkbox as footer it does not work?