如何在我的情况下使用mvvm弹出用户控制按钮单击操作

I have a situation that i have a window and i have created checkboxes on this window (Number of checkboxes were dynamically decided, i am using using MVVM without using any inbuilt framework like MVVM-Light or PRISM) and after selection of those check boxes i click a button, this button also exist on same window. On click to this button must popup another window (lets say GraphDisplay.xaml which is I have a situation that i have a window and i h