[Vxl-users] Re: Problem with picker tableau

[Rowin H. <row...@gm...>]

Well I kind of forgot to paste the code as I promised :P

so here is it

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// ++++  Include VXL files  +++++++++++++++++++++++++++++++++++
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
#include <vgui/vgui.h>
#include <vgui/vgui_projection_inspector.h>

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// ++++  Include external files  ++++++++++++++++++++++++++++++
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
#include "Tgui_picker_tableau.h"

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// ++++  Implementation  ++++++++++++++++++++++++++++++++++++++
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//
vgui_picker_tableau::object_type vgui_picker_tableau::obj_type =3D none_enu=
m;

//=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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//: Constructor, takes a child tableau.
vgui_picker_tableau::vgui_picker_tableau(vgui_tableau_sptr const& t)
  :child_tab(this, t)
{
  use_event_ =3D false;
  pointx =3D 0; pointy =3D 0;
  point_ret =3D true;
}

//=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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//: Destructor.
vgui_picker_tableau::~vgui_picker_tableau()
{
}

//=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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//: Gets a user selected point.
//  This function grabs the event loop and will not return until a
//  mouse down event occurs.
//  Returns true if this is done with the left mouse button, otherwise
false.
//  The coordinates of the point are returned in the parameters.
bool vgui_picker_tableau::pick_point(float* x, float* y)
{
  obj_type =3D point_enum;
  picking_completed =3D false;
  //point_ret =3D true;
  vgui::flush();  // handle any pending events before we grab the event
loop.

  // Grab event loop until picking is completed:
  while (picking_completed =3D=3D false)
        next();

  *x =3D pointx;
  *y =3D pointy;
  obj_type =3D none_enum;

  // deselect all
  //deselect_all_highlighted_objects();
  return point_ret;
}

//=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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//: Handles all events for this tableau.
//  We grab events in this way rather than using a vgui_event_server becaus=
e
//  if we look at events outside the handle function then the gl state
//  associated with those events will have changed.  This means for a
//  draw_overlay event we would end up drawing into the wrong buffer.
//  For a mouse event we would not be able to get the position in the image
//  using the projection_inspector (if e.g. the image was zoomed) since all
//  the gl matrices would have been reset.
bool vgui_picker_tableau::handle(const vgui_event& event)
{
  use_event_ =3D true;

  //---- Object type is point -----
  if (obj_type =3D=3D point_enum)
  {
    if (event.type =3D=3D vgui_BUTTON_DOWN && event.button =3D=3D vgui_LEFT=
)
    {
      vgui_projection_inspector p_insp;
      p_insp.window_to_image_coordinates(event.wx, event.wy, pointx,
pointy);
      point_ret =3D true;
      picking_completed =3D true;
      return true;
    }

    if (event.type =3D=3D vgui_KEY_PRESS || event.type =3D=3D vgui_FOCUSLOS=
T)
    {
        picking_completed =3D true;
        point_ret =3D false;
        //obj_type =3D none_enum;
        return true;
    }
  }

  // Pass events on down to the child tableaux:
  return child_tab->handle(event);
}


//=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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//: Get next event in event loop
bool vgui_picker_tableau::next()
{
  use_event_ =3D false;

  while (!use_event_)
    vgui::run_one_event();
}
--
Grtz
Rowin Heymans