Adding a dropdown or toggle button to DataGrid - gwt

Question

Is there a way to add a dropdown button or toggle button to the CellTable or DataGrid?
The documentation only demonstrates using a regular button (ButtonCell).

Answer 1

To add a ToggleButton to a grid, the only way I found is to place the button in another panel (like a FlowPanel) then add this panel in the grid.
To found this type of button, you can visit the showcase of gwt :
http://samples.gwtproject.org/samples/Showcase/Showcase.html#!CwCustomButton
here my code to have your button in a FlowPanel :
RootLayoutPanel rp = RootLayoutPanel.get();
FlowPanel togglePanel = new FlowPanel();
ToggleButton toggle = new ToggleButton("Coucou");
toggle.setWidth("100px");
togglePanel.add(toggle);
rp.add(togglePanel);
css :
.gwt-ToggleButton-up,
.gwt-ToggleButton-up-hovering,
.gwt-ToggleButton-up-disabled,
.gwt-ToggleButton-down,
.gwt-ToggleButton-down-hovering,
.gwt-ToggleButton-down-disabled {
margin: 0;
text-decoration: none;
background: url("images/hborder.png") repeat-x 0px -27px;
-moz-border-radius: 2px;
border-radius: 2px;
}
.gwt-ToggleButton-up,
.gwt-ToggleButton-up-hovering,
.gwt-ToggleButton-up-disabled {
padding: 3px 5px 3px 5px;
}
.gwt-ToggleButton-up {
border:1px solid #bbb;
border-bottom: 1px solid #a0a0a0;
cursor: pointer;
cursor: hand;
}
.gwt-ToggleButton-up-hovering {
border: 1px solid;
border-color: #939393;
cursor: pointer;
cursor: hand;
}
.gwt-ToggleButton-up-disabled {
border: 1px solid #bbb;
cursor: default;
opacity: .5;
zoom: 1;
filter: alpha(opacity=45);
}
.gwt-ToggleButton-down,
.gwt-ToggleButton-down-hovering,
.gwt-ToggleButton-down-disabled {
padding: 4px 4px 2px 6px;
}
.gwt-ToggleButton-down {
background-position: 0 -513px;
border: 1px inset #666;
cursor: pointer;
cursor: hand;
}
.gwt-ToggleButton-down-hovering {
background-position: 0 -513px;
border: 1px inset;
border-color: #9cf #69e #69e #7af;
cursor: pointer;
cursor: hand;
}
.gwt-ToggleButton-down-disabled {
background-position: 0 -513px;
border: 1px inset #ccc;
cursor: default;
opacity: .5;
zoom: 1;
filter: alpha(opacity=45);
}
It is the basic css i took on the showcase. You should modify it.