i have a question about select all

[Gideon]

hi,

i have a issue about select all button.

now, i use http://www.sigmawidgets.com/products/sigma_grid2/demos/example_master_details.html

i want to click left-top select-all  chechbox ,  but the below checkboxs all can't be selected,  why is it ?

who can teach me how to do that,  thank you very much !

[Gideon]

actually， the function i want  is that, when i click  left-top checkbox, then select all below checkboxs, finally, i want to delete them at the same time!

i think  it is a basic function for a grid...

[Gideon]

is it too difficult ?

[jovibals]

there's a demo folder you can see how this works.