nux::HLayout Class Reference

Inheritance diagram for nux::HLayout:

List of all members.

Public Member Functions
	HLayout (NUX_FILE_LINE_PROTO)
	HLayout (NString name, NUX_FILE_LINE_PROTO)
virtual long	ComputeLayout2 ()
virtual void	ComputePosition2 (float offsetX, float offsetY)
virtual void	HLayoutManagement (int width, int height)
virtual t_u32	GetMaxStretchFactor ()
virtual void	GetCompositeList (std::list< Area * > *ViewList)
void	ComputeStacking (int remaining_width, int &offset_space, int &element_margin)
	Compute the how elements are spread inside the layout.
Protected Member Functions
virtual long	DoFocusUp (IEvent &ievent, long TraverseInfo, long ProcessEventInfo)
virtual long	DoFocusDown (IEvent &ievent, long TraverseInfo, long ProcessEventInfo)
virtual Area *	KeyNavIteration (KeyNavDirection direction)

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Detailed Description

Definition at line 31 of file HLayout.h.

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Member Function Documentation

void nux::HLayout::ComputeStacking	(	int	remaining_width,
		int &	offset_space,
		int &	element_margin
	)

Compute the how elements are spread inside the layout.

Parameters:

remaining_width	Size that remains after subtracting elements width, inner and outer margins from the content width.
offset_space	The space at the left of all elements.
element_margin	The margin between elements.

Definition at line 108 of file HLayout.cpp.

References nux::eStackBottom, nux::eStackCenter, nux::eStackExpand, nux::eStackLeft, nux::eStackRight, and nux::eStackTop.

  {
    int per_element_space = 0;
    int total_used_space = 0;
    int num_elements = 0;

    std::list<Area *>::iterator it;

    for (it = _layout_element_list.begin(); it != _layout_element_list.end(); it++)
    {
      if ((*it)->IsVisible ())
      {
        // gather all the space used by elements
        total_used_space += (*it)->GetBaseWidth();
        num_elements++;
      }
    }

    if (num_elements)
    {
      // Compute the space available for each element
      per_element_space = (remaining_width - total_used_space) / int (num_elements);
    }

    if (per_element_space < 0)
    {
      per_element_space = 0;
    }

    int margin;

    if (per_element_space > 0)
    {
      margin = (per_element_space) / 2;
    }
    else
    {
      margin = 0;
    }

    LayoutContentDistribution stacking = GetContentDistribution();

    switch (stacking)
    {
      case eStackTop:
      case eStackLeft:
      {
        offset_space = 0;
        element_margin = 0;
      }
      break;

      case eStackBottom:
      case eStackRight:
      {
        offset_space = (remaining_width - total_used_space);

        if (offset_space < 0)
          offset_space = 0;

        element_margin = 0;
      }
      break;

      case eStackCenter:
      {
        offset_space = (remaining_width - total_used_space) / 2;

        if (offset_space < 0)
          offset_space = 0;

        element_margin = 0;
      }
      break;

      case eStackExpand:
      default:
      {
        offset_space = 0;
        element_margin = margin;
      }
      break;
    }
  }

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The documentation for this class was generated from the following files:

• Nux/HLayout.h
• Nux/HLayout.cpp