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javacheckboxvaadinvaadin8

Header (select all) checkbox does not stay checked

we are using Vaadin 8 and we have a multi select grid. In the header there is a checkbox present which acts as a select / deselect all checkbox. The problem is that the header checkbox does not stay checked after the window is closed. E.g. if the window is opened, the header checkbox is checked -> all other checkboxes are checked, the window is then closed and opened again he header checkbox is unchecked again. Is there a method to manually set the header checkbox value, or any other workaround? We work with a data provider object and upon the button click the selected items are saved, but we have no way of accessing (or we do not know of a way of accessing) the header checkbox.

Solution

  • The Select All checkbox state is determined through MultiSelectionModelState.allSelected. You can access the model via

    MultiSelectionModelImpl<MyPojo> selectionModel = (MultiSelectionModelImpl<MyPojo>) grid.getSelectionModel();

    (or using the return value when you set the selection mode).

    You can mark the checkbox selected via

    selectionModel.selectAll();

    or deselected via

    selectionModel.deselectAll();