source/grid.cpp

   1 #include "grid.h"
   2
   3 namespace Msp {
   4 namespace GLtk {
   5
   6 Grid::Grid(Layout &l, unsigned c):
   7         Arrangement(l),
   8         columns(c),
   9         first_row(true),
  10         column(0)
  11 { }
  12
  13 void Grid::skip()
  14 {
  15         finish_slot();
  16 }
  17
  18 void Grid::next_row()
  19 {
  20         finish_row();
  21 }
  22
  23 void Grid::process_widget(Widget &wdg, Side side, bool aligned)
  24 {
  25         if(side==TOP)
  26         {
  27                 Edge &top_edge = (first_row ? edges[TOP] : row_top);
  28                 if(top_edge.aligned && aligned)
  29                         add_constraint(wdg, Layout::ALIGN_TOP, top_edge);
  30
  31                 bool snug = (edges[BOTTOM].aligned && aligned);
  32                 add_constraint(wdg, (snug ? Layout::BELOW : Layout::FAR_BELOW), BOTTOM);
  33
  34                 top_edge.add(wdg, aligned);
  35         }
  36         else if(side==BOTTOM)
  37         {
  38                 if(row_bottom.aligned && aligned)
  39                         add_constraint(wdg, Layout::ALIGN_BOTTOM, row_bottom);
  40
  41                 row_bottom.add(wdg, aligned);
  42         }
  43         else if(side==LEFT)
  44         {
  45                 if(columns[column].left.aligned && aligned)
  46                         add_constraint(wdg, Layout::ALIGN_LEFT, columns[column].left);
  47                 else if(column>0)
  48                 {
  49                         bool snug = (columns[column-1].right.aligned && aligned);
  50                         add_constraint(wdg, (snug ? Layout::RIGHT_OF : Layout::FAR_RIGHT_OF), columns[column-1].right);
  51                 }
  52
  53                 edges[LEFT].add(wdg, (aligned && !column));
  54                 columns[column].left.add(wdg, aligned);
  55         }
  56         else if(side==RIGHT)
  57         {
  58                 if(columns[column].right.aligned && aligned)
  59                         add_constraint(wdg, Layout::ALIGN_RIGHT, columns[column].right);
  60
  61                 edges[RIGHT].add(wdg, (aligned && column+1==columns.size()));
  62                 columns[column].right.add(wdg, aligned);
  63         }
  64 }
  65
  66 void Grid::finish_widget(Widget &wdg)
  67 {
  68         layout.set_gravity(wdg, -1, 1);
  69 }
  70
  71 void Grid::finish_slot()
  72 {
  73         ++column;
  74         if(column==columns.size())
  75                 finish_row();
  76 }
  77
  78 void Grid::finish_row()
  79 {
  80         edges[BOTTOM] = row_bottom;
  81         row_bottom.clear();
  82         row_top.clear();
  83         first_row = false;
  84         column = 0;
  85 }
  86
  87 } // namespace GLtk
  88 } // namespace Msp