[Vxl-users] Camera viewer with vgui

[Junaed S. <ju...@ci...>]

Hi there,
First, greetings to everyone on and off the VXL users list that Amitha
sent couple of days ago. Nice to see people using VXL almost all around
the world.

Now the actual reason for the mail: I have a question with vgui, and
idle event handling in particular. My application is a front-end to a
firewire camera, which can grab frames in a single shot mode or a
continuous feed mood. I intend to create the application to support
both; i.e. when in single shot, the application will grab a frame from
the camera and display it in the vgui main window, and in continuous
mode, it will act as a movie player, displaying realtime what the camera
captures. I'm sure of the camera's capability, and I have written code
without vgui that does real time movie display from the camera. My vgui
app  is modeled after the basic_app example, the initialization in the
basic_manager is done as follows:
    ....
  itab_ = vgui_image_tableau_new();
  vgui_viewer2D_tableau_sptr viewer = vgui_viewer2D_tableau_new(itab_);
  vgui_shell_tableau_sptr shell = vgui_shell_tableau_new(viewer);
  this->add_child(shell);
    .....

My idea (maybe not the brightest I'm afraid) is to grab images and
display them using the itab_ tableau above by somehow utilizing the
idle() method of the tableau. I tried overriding the idle() handler for
the event manager class, but it does not get called. So, after all this
talk, what I'm askin is this: if I need to update my itab_ view using
its set_image_view method when my application is idle, which object's
idle method should I override? Is it the vgui_image_tableau object, the
vgui_viewer2D_tableau, the vgui_shell_tableau or none of these and
something else?

Thanks a lot in advance.

-J-