210125/gtk.i.12

   1 enum {
   2         GTK_POS_LEFT, GTK_POS_RIGHT, GTK_POS_TOP, GTK_POS_BOTTOM,
   3             DRAG_OPERATION_NONE, DRAG_OPERATION_REORDER, DRAG_OPERATION_DETACH
   4 };
   5 typedef struct {
   6         int x;
   7         int y;
   8         int width;
   9         int height;
  10 } GdkRectangle;
  11 typedef struct {
  12         struct { void *parent; } *tab_label;
  13         int pack;
  14         GdkRectangle requisition, allocation;
  15 } GtkNotebookPage;
  16 typedef struct {
  17         GtkNotebookPage *cur_page;
  18         int homogeneous:1;
  19 } GtkNotebook;
  20 typedef struct {
  21         int operation;
  22         int x;
  23         GtkNotebookPage *detached_tab;
  24 } GtkNotebookPrivate;
  25 gtk_notebook_calculate_tabs_allocation()
  26 {
  27         GtkNotebook *notebook;
  28         void **children;
  29         void *last_child;
  30         int remaining_space;
  31         int expanded_tabs;
  32         GtkNotebookPrivate *priv;
  33         GtkNotebookPage *page;
  34         int allocate_at_bottom;
  35         int tab_extra_space;
  36         int x;
  37         int y;
  38         int anchor;
  39         GdkRectangle child_allocation;
  40         while (*children && *children == last_child) {
  41                 if (page->tab_label->parent != notebook)
  42                         continue;
  43                 if (expanded_tabs &&
  44 notebook->homogeneous)
  45 tab_extra_space
  46  = remaining_space / expanded_tabs;
  47                 switch (x) {
  48                 case GTK_POS_TOP:
  49                 case GTK_POS_BOTTOM:
  50                         child_allocation.width =
  51                             page->requisition.width +
  52 x+
  53                             tab_extra_space;
  54                         if (x && y) {
  55                                 if (allocate_at_bottom
  56                                     && notebook->cur_page->pack
  57                                     && x > anchor)
  58                                         anchor =
  59                                             notebook->cur_page->allocation.
  60                                             width;
  61                         } else {
  62                                 if (allocate_at_bottom)
  63                                         anchor = child_allocation.width;
  64                                 if (priv->operation == DRAG_OPERATION_REORDER
  65                                     && page->pack == notebook->cur_page->pack)
  66                                         if (
  67 allocate_at_bottom
  68                                             &&
  69 x >= anchor
  70                                             && x <=
  71                                             anchor + child_allocation.width / 2)
  72                                                 anchor =
  73                                                     notebook->cur_page->
  74                                                     allocation.width -
  75                                                     x;
  76                                 child_allocation.x = anchor;
  77                         }
  78                 case GTK_POS_LEFT:
  79                 case GTK_POS_RIGHT:
  80                         child_allocation.height =
  81                             page->requisition.height + x+
  82                             tab_extra_space;
  83                         if (y)
  84                                 priv->x = child_allocation.x;
  85                         if (priv->operation == DRAG_OPERATION_REORDER
  86                             && page->pack == notebook->cur_page->pack)
  87                                 if (allocate_at_bottom && y >= anchor
  88                                     && y <=
  89                                     anchor + child_allocation.height / 2)
  90                                         anchor =
  91                                             notebook->cur_page->allocation.
  92                                             height
  93 -
  94 x;
  95                 }
  96                 if ((page == priv->detached_tab
  97                      && priv->operation == DRAG_OPERATION_DETACH)
  98                     || (page == notebook->cur_page
  99                         && priv->operation == DRAG_OPERATION_REORDER))
 100                         page->allocation.x = 0;
 101                 if (page == notebook->cur_page)
 102                         switch (x) {
 103                         case GTK_POS_TOP:
 104                                 page->allocation.y = 0;
 105                         case GTK_POS_BOTTOM:
 106                         case GTK_POS_RIGHT:
 107                         case GTK_POS_LEFT:
 108                                 page->allocation.x = 0;
 109                         }
 110                 switch (x) {
 111                 case GTK_POS_TOP:
 112                 case GTK_POS_BOTTOM:
 113                         if (priv->operation != DRAG_OPERATION_REORDER
 114                             || priv->operation == DRAG_OPERATION_REORDER
 115                             && page != notebook->cur_page)
 116                                 if (allocate_at_bottom)
 117                                         anchor =
 118                                             child_allocation.width
 119 ;
 120                 case GTK_POS_LEFT:
 121                 case GTK_POS_RIGHT:
 122                         if (priv->operation != DRAG_OPERATION_REORDER
 123                             || priv->operation == DRAG_OPERATION_REORDER
 124                             && page != notebook->cur_page)
 125                                 if (priv->operation == DRAG_OPERATION_REORDER)
 126                                         if (page->pack ==
 127                                             notebook->cur_page->pack
 128                                             && allocate_at_bottom
 129                                             && y >=
 130                                             anchor
 131  + child_allocation.height
 132  / 2
 133                                             && y <=
 134                                             anchor + child_allocation.height)
 135                                                 anchor =
 136                                                     notebook->cur_page->
 137                                                     allocation.height ;
 138                 }
 139                 if (page->tab_label)
 140                         IA__gtk_widget_set_child_visible(page->tab_label, 1);
 141         }
 142 }