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gtkcellareabox.c
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gtkcellareabox.c
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/* gtkcellareabox.c
*
* Copyright (C) 2010 Openismus GmbH
*
* Authors:
* Tristan Van Berkom <tristanvb@openismus.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:gtkcellareabox
* @Short_Description: A cell area that renders GtkCellRenderers
* into a row or a column
* @Title: GtkCellAreaBox
*
* The #GtkCellAreaBox renders cell renderers into a row or a column
* depending on its #GtkOrientation.
*
* GtkCellAreaBox uses a notion of <emphasis>packing</emphasis>. Packing
* refers to adding cell renderers with reference to a particular position
* in a #GtkCellAreaBox. There are two reference positions: the
* <emphasis>start</emphasis> and the <emphasis>end</emphasis> of the box.
* When the #GtkCellAreaBox is oriented in the %GTK_ORIENTATION_VERTICAL
* orientation, the start is defined as the top of the box and the end is
* defined as the bottom. In the %GTK_ORIENTATION_HORIZONTAL orientation
* start is defined as the left side and the end is defined as the right
* side.
*
* Alignments of #GtkCellRenderers rendered in adjacent rows can be
* configured by configuring the #GtkCellAreaBox:align child cell property
* with gtk_cell_area_cell_set_property() or by specifying the "align"
* argument to gtk_cell_area_box_pack_start() and gtk_cell_area_box_pack_end().
*/
#include "config.h"
#include "gtkintl.h"
#include "gtkorientable.h"
#include "gtkcelllayout.h"
#include "gtkcellareabox.h"
#include "gtkcellareaboxcontextprivate.h"
#include "gtktypebuiltins.h"
#include "gtkprivate.h"
/* GObjectClass */
static void gtk_cell_area_box_finalize (GObject *object);
static void gtk_cell_area_box_dispose (GObject *object);
static void gtk_cell_area_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_area_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
/* GtkCellAreaClass */
static void gtk_cell_area_box_add (GtkCellArea *area,
GtkCellRenderer *renderer);
static void gtk_cell_area_box_remove (GtkCellArea *area,
GtkCellRenderer *renderer);
static void gtk_cell_area_box_foreach (GtkCellArea *area,
GtkCellCallback callback,
gpointer callback_data);
static void gtk_cell_area_box_foreach_alloc (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
const GdkRectangle *background_area,
GtkCellAllocCallback callback,
gpointer callback_data);
static void gtk_cell_area_box_apply_attributes (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded);
static void gtk_cell_area_box_set_cell_property (GtkCellArea *area,
GtkCellRenderer *renderer,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_area_box_get_cell_property (GtkCellArea *area,
GtkCellRenderer *renderer,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GtkCellAreaContext *gtk_cell_area_box_create_context (GtkCellArea *area);
static GtkCellAreaContext *gtk_cell_area_box_copy_context (GtkCellArea *area,
GtkCellAreaContext *context);
static GtkSizeRequestMode gtk_cell_area_box_get_request_mode (GtkCellArea *area);
static void gtk_cell_area_box_get_preferred_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
static void gtk_cell_area_box_get_preferred_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
static void gtk_cell_area_box_get_preferred_height_for_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_cell_area_box_get_preferred_width_for_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static gboolean gtk_cell_area_box_focus (GtkCellArea *area,
GtkDirectionType direction);
/* GtkCellLayoutIface */
static void gtk_cell_area_box_cell_layout_init (GtkCellLayoutIface *iface);
static void gtk_cell_area_box_layout_pack_start (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
gboolean expand);
static void gtk_cell_area_box_layout_pack_end (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
gboolean expand);
static void gtk_cell_area_box_layout_reorder (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
gint position);
static void gtk_cell_area_box_focus_changed (GtkCellArea *area,
GParamSpec *pspec,
GtkCellAreaBox *box);
/* CellInfo/CellGroup metadata handling and convenience functions */
typedef struct {
GtkCellRenderer *renderer;
guint expand : 1; /* Whether the cell expands */
guint pack : 1; /* Whether it is packed from the start or end */
guint align : 1; /* Whether to align its position with adjacent rows */
guint fixed : 1; /* Whether to require the same size for all rows */
} CellInfo;
typedef struct {
GList *cells;
guint id : 8;
guint n_cells : 8;
guint expand_cells : 8;
guint align : 1;
guint visible : 1;
} CellGroup;
typedef struct {
GtkCellRenderer *renderer;
gint position;
gint size;
} AllocatedCell;
static CellInfo *cell_info_new (GtkCellRenderer *renderer,
GtkPackType pack,
gboolean expand,
gboolean align,
gboolean fixed);
static void cell_info_free (CellInfo *info);
static gint cell_info_find (CellInfo *info,
GtkCellRenderer *renderer);
static AllocatedCell *allocated_cell_new (GtkCellRenderer *renderer,
gint position,
gint size);
static void allocated_cell_free (AllocatedCell *cell);
static GList *list_consecutive_cells (GtkCellAreaBox *box);
static gint count_expand_groups (GtkCellAreaBox *box);
static void context_weak_notify (GtkCellAreaBox *box,
GtkCellAreaBoxContext *dead_context);
static void reset_contexts (GtkCellAreaBox *box);
static void init_context_groups (GtkCellAreaBox *box);
static void init_context_group (GtkCellAreaBox *box,
GtkCellAreaBoxContext *context);
static GSList *get_allocated_cells (GtkCellAreaBox *box,
GtkCellAreaBoxContext *context,
GtkWidget *widget,
gint width,
gint height);
struct _GtkCellAreaBoxPrivate
{
/* We hold on to the previously focused cell when navigating
* up and down in a horizontal box (or left and right on a vertical one)
* this way we always re-enter the last focused cell.
*/
GtkCellRenderer *last_focus_cell;
gulong focus_cell_id;
GList *cells;
GArray *groups;
GSList *contexts;
GtkOrientation orientation;
gint spacing;
/* We hold on to the rtl state from a widget we are requested for
* so that we can navigate focus correctly
*/
gboolean rtl;
};
enum {
PROP_0,
PROP_ORIENTATION,
PROP_SPACING
};
enum {
CELL_PROP_0,
CELL_PROP_EXPAND,
CELL_PROP_ALIGN,
CELL_PROP_FIXED_SIZE,
CELL_PROP_PACK_TYPE
};
G_DEFINE_TYPE_WITH_CODE (GtkCellAreaBox, gtk_cell_area_box, GTK_TYPE_CELL_AREA,
G_ADD_PRIVATE (GtkCellAreaBox)
G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
gtk_cell_area_box_cell_layout_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
static void
gtk_cell_area_box_init (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv;
box->priv = gtk_cell_area_box_get_instance_private (box);
priv = box->priv;
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->groups = g_array_new (FALSE, TRUE, sizeof (CellGroup));
priv->cells = NULL;
priv->contexts = NULL;
priv->spacing = 0;
priv->rtl = FALSE;
/* Watch whenever focus is given to a cell, even if it's not with keynav,
* this way we remember upon entry of the area where focus was last time
* around
*/
priv->focus_cell_id = g_signal_connect (box, "notify::focus-cell",
G_CALLBACK (gtk_cell_area_box_focus_changed), box);
}
static void
gtk_cell_area_box_class_init (GtkCellAreaBoxClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkCellAreaClass *area_class = GTK_CELL_AREA_CLASS (class);
/* GObjectClass */
object_class->finalize = gtk_cell_area_box_finalize;
object_class->dispose = gtk_cell_area_box_dispose;
object_class->set_property = gtk_cell_area_box_set_property;
object_class->get_property = gtk_cell_area_box_get_property;
/* GtkCellAreaClass */
area_class->add = gtk_cell_area_box_add;
area_class->remove = gtk_cell_area_box_remove;
area_class->foreach = gtk_cell_area_box_foreach;
area_class->foreach_alloc = gtk_cell_area_box_foreach_alloc;
area_class->apply_attributes = gtk_cell_area_box_apply_attributes;
area_class->set_cell_property = gtk_cell_area_box_set_cell_property;
area_class->get_cell_property = gtk_cell_area_box_get_cell_property;
area_class->create_context = gtk_cell_area_box_create_context;
area_class->copy_context = gtk_cell_area_box_copy_context;
area_class->get_request_mode = gtk_cell_area_box_get_request_mode;
area_class->get_preferred_width = gtk_cell_area_box_get_preferred_width;
area_class->get_preferred_height = gtk_cell_area_box_get_preferred_height;
area_class->get_preferred_height_for_width = gtk_cell_area_box_get_preferred_height_for_width;
area_class->get_preferred_width_for_height = gtk_cell_area_box_get_preferred_width_for_height;
area_class->focus = gtk_cell_area_box_focus;
/* Properties */
g_object_class_override_property (object_class, PROP_ORIENTATION, "orientation");
/**
* GtkCellAreaBox:spacing:
*
* The amount of space to reserve between cells.
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_SPACING,
g_param_spec_int ("spacing",
P_("Spacing"),
P_("Space which is inserted between cells"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
/* Cell Properties */
/**
* GtkCellAreaBox:expand:
*
* Whether the cell renderer should receive extra space
* when the area receives more than its natural size.
*
* Since: 3.0
*/
gtk_cell_area_class_install_cell_property (area_class,
CELL_PROP_EXPAND,
g_param_spec_boolean
("expand",
P_("Expand"),
P_("Whether the cell expands"),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkCellAreaBox:align:
*
* Whether the cell renderer should be aligned in adjacent rows.
*
* Since: 3.0
*/
gtk_cell_area_class_install_cell_property (area_class,
CELL_PROP_ALIGN,
g_param_spec_boolean
("align",
P_("Align"),
P_("Whether cell should align with adjacent rows"),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkCellAreaBox:fixed-size:
*
* Whether the cell renderer should require the same size
* for all rows for which it was requested.
*
* Since: 3.0
*/
gtk_cell_area_class_install_cell_property (area_class,
CELL_PROP_FIXED_SIZE,
g_param_spec_boolean
("fixed-size",
P_("Fixed Size"),
P_("Whether cells should be the same size in all rows"),
TRUE,
GTK_PARAM_READWRITE));
/**
* GtkCellAreaBox:pack-type:
*
* A GtkPackType indicating whether the cell renderer is packed
* with reference to the start or end of the area.
*
* Since: 3.0
*/
gtk_cell_area_class_install_cell_property (area_class,
CELL_PROP_PACK_TYPE,
g_param_spec_enum
("pack-type",
P_("Pack Type"),
P_("A GtkPackType indicating whether the cell is packed with "
"reference to the start or end of the cell area"),
GTK_TYPE_PACK_TYPE, GTK_PACK_START,
GTK_PARAM_READWRITE));
}
/*************************************************************
* CellInfo/CellGroup basics and convenience functions *
*************************************************************/
static CellInfo *
cell_info_new (GtkCellRenderer *renderer,
GtkPackType pack,
gboolean expand,
gboolean align,
gboolean fixed)
{
CellInfo *info = g_slice_new (CellInfo);
info->renderer = g_object_ref_sink (renderer);
info->pack = pack;
info->expand = expand;
info->align = align;
info->fixed = fixed;
return info;
}
static void
cell_info_free (CellInfo *info)
{
g_object_unref (info->renderer);
g_slice_free (CellInfo, info);
}
static gint
cell_info_find (CellInfo *info,
GtkCellRenderer *renderer)
{
return (info->renderer == renderer) ? 0 : -1;
}
static AllocatedCell *
allocated_cell_new (GtkCellRenderer *renderer,
gint position,
gint size)
{
AllocatedCell *cell = g_slice_new (AllocatedCell);
cell->renderer = renderer;
cell->position = position;
cell->size = size;
return cell;
}
static void
allocated_cell_free (AllocatedCell *cell)
{
g_slice_free (AllocatedCell, cell);
}
static GList *
list_consecutive_cells (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
GList *l, *consecutive_cells = NULL, *pack_end_cells = NULL;
CellInfo *info;
/* List cells in consecutive order taking their
* PACK_START/PACK_END options into account
*/
for (l = priv->cells; l; l = l->next)
{
info = l->data;
if (info->pack == GTK_PACK_START)
consecutive_cells = g_list_prepend (consecutive_cells, info);
}
for (l = priv->cells; l; l = l->next)
{
info = l->data;
if (info->pack == GTK_PACK_END)
pack_end_cells = g_list_prepend (pack_end_cells, info);
}
consecutive_cells = g_list_reverse (consecutive_cells);
consecutive_cells = g_list_concat (consecutive_cells, pack_end_cells);
return consecutive_cells;
}
static void
cell_groups_clear (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
gint i;
for (i = 0; i < priv->groups->len; i++)
{
CellGroup *group = &g_array_index (priv->groups, CellGroup, i);
g_list_free (group->cells);
}
g_array_set_size (priv->groups, 0);
}
static void
cell_groups_rebuild (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
CellGroup group = { 0, };
CellGroup *group_ptr;
GList *cells, *l;
guint id = 0;
gboolean last_cell_fixed = FALSE;
cell_groups_clear (box);
if (!priv->cells)
return;
cells = list_consecutive_cells (box);
/* First group is implied */
g_array_append_val (priv->groups, group);
group_ptr = &g_array_index (priv->groups, CellGroup, id);
for (l = cells; l; l = l->next)
{
CellInfo *info = l->data;
/* A new group starts with any aligned cell, or
* at the beginning and end of a fixed size cell.
* the first group is implied */
if ((info->align || info->fixed || last_cell_fixed) && l != cells)
{
memset (&group, 0x0, sizeof (CellGroup));
group.id = ++id;
g_array_append_val (priv->groups, group);
group_ptr = &g_array_index (priv->groups, CellGroup, id);
}
group_ptr->cells = g_list_prepend (group_ptr->cells, info);
group_ptr->n_cells++;
/* Not every group is aligned, some are floating
* fixed size cells */
if (info->align)
group_ptr->align = TRUE;
/* A group expands if it contains any expand cells */
if (info->expand)
group_ptr->expand_cells++;
last_cell_fixed = info->fixed;
}
g_list_free (cells);
for (id = 0; id < priv->groups->len; id++)
{
group_ptr = &g_array_index (priv->groups, CellGroup, id);
group_ptr->cells = g_list_reverse (group_ptr->cells);
}
/* Contexts need to be updated with the new grouping information */
init_context_groups (box);
}
static gint
count_visible_cells (CellGroup *group,
gint *expand_cells)
{
GList *l;
gint visible_cells = 0;
gint n_expand_cells = 0;
for (l = group->cells; l; l = l->next)
{
CellInfo *info = l->data;
if (gtk_cell_renderer_get_visible (info->renderer))
{
visible_cells++;
if (info->expand)
n_expand_cells++;
}
}
if (expand_cells)
*expand_cells = n_expand_cells;
return visible_cells;
}
static gint
count_expand_groups (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
gint i;
gint expand_groups = 0;
for (i = 0; i < priv->groups->len; i++)
{
CellGroup *group = &g_array_index (priv->groups, CellGroup, i);
if (group->expand_cells > 0)
expand_groups++;
}
return expand_groups;
}
static void
context_weak_notify (GtkCellAreaBox *box,
GtkCellAreaBoxContext *dead_context)
{
GtkCellAreaBoxPrivate *priv = box->priv;
priv->contexts = g_slist_remove (priv->contexts, dead_context);
}
static void
init_context_group (GtkCellAreaBox *box,
GtkCellAreaBoxContext *context)
{
GtkCellAreaBoxPrivate *priv = box->priv;
gint *expand_groups, *align_groups, i;
expand_groups = g_new (gboolean, priv->groups->len);
align_groups = g_new (gboolean, priv->groups->len);
for (i = 0; i < priv->groups->len; i++)
{
CellGroup *group = &g_array_index (priv->groups, CellGroup, i);
expand_groups[i] = (group->expand_cells > 0);
align_groups[i] = group->align;
}
/* This call implies resetting the request info */
_gtk_cell_area_box_init_groups (context, priv->groups->len, expand_groups, align_groups);
g_free (expand_groups);
g_free (align_groups);
}
static void
init_context_groups (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
GSList *l;
/* When the box's groups are reconstructed,
* contexts need to be reinitialized.
*/
for (l = priv->contexts; l; l = l->next)
{
GtkCellAreaBoxContext *context = l->data;
init_context_group (box, context);
}
}
static void
reset_contexts (GtkCellAreaBox *box)
{
GtkCellAreaBoxPrivate *priv = box->priv;
GSList *l;
/* When the box layout changes, contexts need to
* be reset and sizes for the box get requested again
*/
for (l = priv->contexts; l; l = l->next)
{
GtkCellAreaContext *context = l->data;
gtk_cell_area_context_reset (context);
}
}
/* Fall back on a completely unaligned dynamic allocation of cells
* when not allocated for the said orientation, alignment of cells
* is not done when each area gets a different size in the orientation
* of the box.
*/
static GSList *
allocate_cells_manually (GtkCellAreaBox *box,
GtkWidget *widget,
gint width,
gint height)
{
GtkCellAreaBoxPrivate *priv = box->priv;
GList *cells, *l;
GSList *allocated_cells = NULL;
GtkRequestedSize *sizes;
gint i;
gint nvisible = 0, nexpand = 0, group_expand;
gint avail_size, extra_size, extra_extra, full_size;
gint position = 0, for_size;
gboolean rtl;
if (!priv->cells)
return NULL;
/* For vertical oriented boxes, we just let the cell renderers
* realign themselves for rtl
*/
rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
cells = list_consecutive_cells (box);
/* Count the visible and expand cells */
for (i = 0; i < priv->groups->len; i++)
{
CellGroup *group = &g_array_index (priv->groups, CellGroup, i);
nvisible += count_visible_cells (group, &group_expand);
nexpand += group_expand;
}
if (nvisible <= 0)
{
g_list_free (cells);
return NULL;
}
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
full_size = avail_size = width;
for_size = height;
}
else
{
full_size = avail_size = height;
for_size = width;
}
/* Go ahead and collect the requests on the fly */
sizes = g_new0 (GtkRequestedSize, nvisible);
for (l = cells, i = 0; l; l = l->next)
{
CellInfo *info = l->data;
if (!gtk_cell_renderer_get_visible (info->renderer))
continue;
gtk_cell_area_request_renderer (GTK_CELL_AREA (box), info->renderer,
priv->orientation,
widget, for_size,
&sizes[i].minimum_size,
&sizes[i].natural_size);
avail_size -= sizes[i].minimum_size;
sizes[i].data = info;
i++;
}
/* Naturally distribute the allocation */
avail_size -= (nvisible - 1) * priv->spacing;
if (avail_size > 0)
avail_size = gtk_distribute_natural_allocation (avail_size, nvisible, sizes);
else
avail_size = 0;
/* Calculate/distribute expand for cells */
if (nexpand > 0)
{
extra_size = avail_size / nexpand;
extra_extra = avail_size % nexpand;
}
else
extra_size = extra_extra = 0;
/* Create the allocated cells */
for (i = 0; i < nvisible; i++)
{
CellInfo *info = sizes[i].data;
AllocatedCell *cell;
if (info->expand)
{
sizes[i].minimum_size += extra_size;
if (extra_extra)
{
sizes[i].minimum_size++;
extra_extra--;
}
}
if (rtl)
cell = allocated_cell_new (info->renderer,
full_size - (position + sizes[i].minimum_size),
sizes[i].minimum_size);
else
cell = allocated_cell_new (info->renderer, position, sizes[i].minimum_size);
allocated_cells = g_slist_prepend (allocated_cells, cell);
position += sizes[i].minimum_size;
position += priv->spacing;
}
g_free (sizes);
g_list_free (cells);
/* Note it might not be important to reverse the list here at all,
* we have the correct positions, no need to allocate from left to right
*/
return g_slist_reverse (allocated_cells);
}
/* Returns an allocation for each cell in the orientation of the box,
* used in ->render()/->event() implementations to get a straight-forward
* list of allocated cells to operate on.
*/
static GSList *
get_allocated_cells (GtkCellAreaBox *box,
GtkCellAreaBoxContext *context,
GtkWidget *widget,
gint width,
gint height)
{
GtkCellAreaBoxAllocation *group_allocs;
GtkCellArea *area = GTK_CELL_AREA (box);
GtkCellAreaBoxPrivate *priv = box->priv;
GList *cell_list;
GSList *allocated_cells = NULL;
gint i, j, n_allocs, position;
gint for_size, full_size;
gboolean rtl;
group_allocs = _gtk_cell_area_box_context_get_orientation_allocs (context, &n_allocs);
if (!group_allocs)
return allocate_cells_manually (box, widget, width, height);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
full_size = width;
for_size = height;
}
else
{
full_size = height;
for_size = width;
}
/* For vertical oriented boxes, we just let the cell renderers
* realign themselves for rtl
*/
rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
for (position = 0, i = 0; i < n_allocs; i++)
{
/* We dont always allocate all groups, sometimes the requested
* group has only invisible cells for every row, hence the usage
* of group_allocs[i].group_idx here
*/
CellGroup *group = &g_array_index (priv->groups, CellGroup, group_allocs[i].group_idx);
/* Exception for single cell groups */
if (group->n_cells == 1)
{
CellInfo *info = group->cells->data;
AllocatedCell *cell;
gint cell_position, cell_size;
if (!gtk_cell_renderer_get_visible (info->renderer))
continue;
/* If were not aligned, place the cell after the last cell */
if (info->align)
position = cell_position = group_allocs[i].position;
else
cell_position = position;
/* If not a fixed size, use only the requested size for this row */
if (info->fixed)
cell_size = group_allocs[i].size;
else
{
gint dummy;
gtk_cell_area_request_renderer (area, info->renderer,
priv->orientation,
widget, for_size,
&dummy,
&cell_size);
cell_size = MIN (cell_size, group_allocs[i].size);
}
if (rtl)
cell = allocated_cell_new (info->renderer,
full_size - (cell_position + cell_size), cell_size);
else
cell = allocated_cell_new (info->renderer, cell_position, cell_size);
position += cell_size;
position += priv->spacing;
allocated_cells = g_slist_prepend (allocated_cells, cell);
}
else
{
GtkRequestedSize *sizes;
gint avail_size, cell_position;
gint visible_cells, expand_cells;
gint extra_size, extra_extra;
visible_cells = count_visible_cells (group, &expand_cells);
/* If this row has no visible cells in this group, just
* skip the allocation
*/
if (visible_cells == 0)
continue;
/* If were not aligned, place the cell after the last cell
* and eat up the extra space
*/
if (group->align)
{
avail_size = group_allocs[i].size;
position = cell_position = group_allocs[i].position;
}
else
{
avail_size = group_allocs[i].size + (group_allocs[i].position - position);
cell_position = position;
}
sizes = g_new (GtkRequestedSize, visible_cells);
for (j = 0, cell_list = group->cells; cell_list; cell_list = cell_list->next)
{
CellInfo *info = cell_list->data;
if (!gtk_cell_renderer_get_visible (info->renderer))
continue;
gtk_cell_area_request_renderer (area, info->renderer,
priv->orientation,
widget, for_size,
&sizes[j].minimum_size,
&sizes[j].natural_size);
sizes[j].data = info;
avail_size -= sizes[j].minimum_size;
j++;
}
/* Distribute cells naturally within the group */
avail_size -= (visible_cells - 1) * priv->spacing;
if (avail_size > 0)
avail_size = gtk_distribute_natural_allocation (avail_size, visible_cells, sizes);
else
avail_size = 0;
/* Calculate/distribute expand for cells */
if (expand_cells > 0)
{
extra_size = avail_size / expand_cells;
extra_extra = avail_size % expand_cells;
}
else
extra_size = extra_extra = 0;
/* Create the allocated cells (loop only over visible cells here) */
for (j = 0; j < visible_cells; j++)
{
CellInfo *info = sizes[j].data;
AllocatedCell *cell;
if (info->expand)
{
sizes[j].minimum_size += extra_size;
if (extra_extra)
{
sizes[j].minimum_size++;
extra_extra--;
}
}
if (rtl)
cell = allocated_cell_new (info->renderer,
full_size - (cell_position + sizes[j].minimum_size),
sizes[j].minimum_size);
else
cell = allocated_cell_new (info->renderer, cell_position, sizes[j].minimum_size);
allocated_cells = g_slist_prepend (allocated_cells, cell);
cell_position += sizes[j].minimum_size;
cell_position += priv->spacing;
}
g_free (sizes);
position = cell_position;
}
}
g_free (group_allocs);
/* Note it might not be important to reverse the list here at all,
* we have the correct positions, no need to allocate from left to right
*/
return g_slist_reverse (allocated_cells);
}