static void
st_table_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
gfloat total_min_height, total_pref_height;
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
gint i;
DimensionData *rows;
/* We only support height-for-width allocation. So if we are called
* width-for-height, calculate heights based on our natural width
*/
if (for_width < 0)
{
float natural_width;
clutter_actor_get_preferred_width (self, -1, NULL, &natural_width);
for_width = natural_width;
}
if (priv->n_rows < 1)
{
*min_height_p = 0;
*natural_height_p = 0;
return;
}
st_theme_node_adjust_for_width (theme_node, &for_width);
/* use min_widths to help allocation of height-for-width widgets */
st_table_calculate_dimensions (ST_TABLE (self), for_width, -1);
rows = &g_array_index (priv->rows, DimensionData, 0);
/* start off with row spacing */
total_min_height = (priv->visible_rows - 1) * (float)(priv->row_spacing);
total_pref_height = total_min_height;
for (i = 0; i < priv->n_rows; i++)
{
total_min_height += rows[i].min_size;
total_pref_height += rows[i].pref_size;
}
if (min_height_p)
*min_height_p = total_min_height;
if (natural_height_p)
*natural_height_p = total_pref_height;
st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p);
}
static void
st_table_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
gfloat total_min_width, total_pref_width;
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
gint i;
DimensionData *columns;
if (priv->n_cols < 1)
{
*min_width_p = 0;
*natural_width_p = 0;
return;
}
/* use min_widths to help allocation of height-for-width widgets */
st_table_calculate_dimensions (ST_TABLE (self), -1, for_height);
columns = &g_array_index (priv->columns, DimensionData, 0);
/* start off with row spacing */
total_min_width = (priv->visible_cols - 1) * (float)(priv->col_spacing);
total_pref_width = total_min_width;
for (i = 0; i < priv->n_cols; i++)
{
total_min_width += columns[i].min_size;
total_pref_width += columns[i].pref_size;
}
/* If we were requested width-for-height, then we reported minimum/natural
* heights based on our natural width. If we were allocated less than our
* natural width, then we need more height. So in the width-for-height
* case we need to disable shrinking.
*/
if (for_height >= 0)
total_min_width = total_pref_width;
if (min_width_p)
*min_width_p = total_min_width;
if (natural_width_p)
*natural_width_p = total_pref_width;
st_theme_node_adjust_preferred_width (theme_node, min_width_p, natural_width_p);
}
static void
st_table_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
StTablePrivate *priv = ST_TABLE (gobject)->priv;
switch (prop_id)
{
case PROP_HOMOGENEOUS:
g_value_set_boolean (value, priv->homogeneous);
break;
case PROP_COL_COUNT:
g_value_set_int (value, priv->n_cols);
break;
case PROP_ROW_COUNT:
g_value_set_int (value, priv->n_rows);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
/**
* st_table_get_column_count:
* @table: A #StTable
*
* Retrieve the current number of columns in @table
*
* Returns: the number of columns
*/
gint
st_table_get_column_count (StTable *table)
{
g_return_val_if_fail (ST_IS_TABLE (table), -1);
return ST_TABLE (table)->priv->n_cols;
}
static void
st_table_finalize (GObject *gobject)
{
StTablePrivate *priv = ST_TABLE (gobject)->priv;
g_array_free (priv->columns, TRUE);
g_array_free (priv->rows, TRUE);
G_OBJECT_CLASS (st_table_parent_class)->finalize (gobject);
}
static void
st_table_finalize (GObject *gobject)
{
StTablePrivate *priv = ST_TABLE (gobject)->priv;
g_array_free (priv->min_widths, TRUE);
g_array_free (priv->pref_widths, TRUE);
g_array_free (priv->min_heights, TRUE);
g_array_free (priv->pref_heights, TRUE);
g_array_free (priv->is_expand_col, TRUE);
g_array_free (priv->is_expand_row, TRUE);
g_array_free (priv->col_widths, TRUE);
g_array_free (priv->row_heights, TRUE);
G_OBJECT_CLASS (st_table_parent_class)->finalize (gobject);
}
static void
st_table_style_changed (StWidget *self)
{
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (self);
int old_row_spacing = priv->row_spacing;
int old_col_spacing = priv->col_spacing;
double row_spacing, col_spacing;
row_spacing = st_theme_node_get_length (theme_node, "spacing-rows");
priv->row_spacing = (int)(row_spacing + 0.5);
col_spacing = st_theme_node_get_length (theme_node, "spacing-columns");
priv->col_spacing = (int)(col_spacing + 0.5);
if (priv->row_spacing != old_row_spacing ||
priv->col_spacing != old_col_spacing)
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
ST_WIDGET_CLASS (st_table_parent_class)->style_changed (self);
}
static void
st_table_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
ClutterActorBox content_box;
clutter_actor_set_allocation (self, box, flags);
if (priv->n_cols < 1 || priv->n_rows < 1)
return;
st_theme_node_get_content_box (theme_node, box, &content_box);
if (priv->homogeneous)
st_table_homogeneous_allocate (self, &content_box, flags);
else
st_table_preferred_allocate (self, &content_box, flags);
}
/*
* ClutterContainer Implementation
*/
static void
st_table_actor_removed (ClutterContainer *container,
ClutterActor *actor)
{
StTablePrivate *priv = ST_TABLE (container)->priv;
gint n_rows = 0;
gint n_cols = 0;
ClutterActor *child;
/* Calculate and update the number of rows / columns */
for (child = clutter_actor_get_first_child (CLUTTER_ACTOR (container));
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
StTableChild *meta;
if (child == actor)
continue;
meta = (StTableChild *) clutter_container_get_child_meta (container, child);
n_rows = MAX (n_rows, meta->row + 1);
n_cols = MAX (n_cols, meta->col + 1);
}
g_object_freeze_notify (G_OBJECT (container));
if (priv->n_rows != n_rows)
{
priv->n_rows = n_rows;
g_object_notify (G_OBJECT (container), "row-count");
}
if (priv->n_cols != n_cols)
{
priv->n_cols = n_cols;
g_object_notify (G_OBJECT (container), "column-count");
}
g_object_thaw_notify (G_OBJECT (container));
}
/*
* ClutterContainer Implementation
*/
static void
st_table_actor_removed (ClutterContainer *container,
ClutterActor *actor)
{
StTablePrivate *priv = ST_TABLE (container)->priv;
GList *list, *children;
gint n_rows = 0;
gint n_cols = 0;
/* Calculate and update the number of rows / columns */
children = st_container_get_children_list (ST_CONTAINER (container));
for (list = children; list; list = list->next)
{
ClutterActor *child = CLUTTER_ACTOR (list->data);
StTableChild *meta;
if (child == actor)
continue;
meta = (StTableChild *) clutter_container_get_child_meta (container, child);
n_rows = MAX (n_rows, meta->row + 1);
n_cols = MAX (n_cols, meta->col + 1);
}
g_object_freeze_notify (G_OBJECT (container));
if (priv->n_rows != n_rows)
{
priv->n_rows = n_rows;
g_object_notify (G_OBJECT (container), "row-count");
}
if (priv->n_cols != n_cols)
{
priv->n_cols = n_cols;
g_object_notify (G_OBJECT (container), "column-count");
}
g_object_thaw_notify (G_OBJECT (container));
}
static void
st_table_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
StTable *table = ST_TABLE (gobject);
switch (prop_id)
{
case PROP_HOMOGENEOUS:
if (table->priv->homogeneous != g_value_get_boolean (value))
{
table->priv->homogeneous = g_value_get_boolean (value);
clutter_actor_queue_relayout ((ClutterActor *) gobject);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
st_table_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
gint *min_heights, *pref_heights;
gfloat total_min_height, total_pref_height;
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
gint i;
gint *min_widths;
ClutterActor *child;
/* We only support height-for-width allocation. So if we are called
* width-for-height, calculate heights based on our natural width
*/
if (for_width < 0)
{
float natural_width;
clutter_actor_get_preferred_width (self, -1, NULL, &natural_width);
for_width = natural_width;
}
if (priv->n_rows < 1)
{
*min_height_p = 0;
*natural_height_p = 0;
return;
}
st_theme_node_adjust_for_width (theme_node, &for_width);
/* Setting size to zero and then what we want it to be causes a clear if
* clear flag is set (which it should be.)
*/
g_array_set_size (priv->min_heights, 0);
g_array_set_size (priv->pref_heights, 0);
g_array_set_size (priv->min_heights, priv->n_rows);
g_array_set_size (priv->pref_heights, priv->n_rows);
/* use min_widths to help allocation of height-for-width widgets */
min_widths = st_table_calculate_col_widths (ST_TABLE (self), for_width);
min_heights = (gint *) priv->min_heights->data;
pref_heights = (gint *) priv->pref_heights->data;
/* calculate minimum row heights */
for (child = clutter_actor_get_first_child (self);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gint row, col, col_span, cell_width, row_span;
gfloat min, pref;
StTableChild *meta;
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
row = meta->row;
col = meta->col;
col_span = meta->col_span;
row_span = meta->row_span;
cell_width = 0;
for (i = 0; i < col_span && col + i < priv->n_cols; i++)
cell_width += min_widths[col + i];
_st_actor_get_preferred_height (child, (float) cell_width, meta->x_fill,
&min, &pref);
if (row_span == 1 && min > min_heights[row])
min_heights[row] = min;
if (row_span == 1 && pref > pref_heights[row])
pref_heights[row] = pref;
}
/* start off with row spacing */
total_min_height = (priv->n_rows - 1) * (float) (priv->row_spacing);
total_pref_height = total_min_height;
for (i = 0; i < priv->n_rows; i++)
{
total_min_height += min_heights[i];
total_pref_height += pref_heights[i];
}
if (min_height_p)
*min_height_p = total_min_height;
if (natural_height_p)
*natural_height_p = total_pref_height;
st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p);
}
static void
st_table_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
gint *min_widths, *pref_widths;
gfloat total_min_width, total_pref_width;
StTablePrivate *priv = ST_TABLE (self)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
gint i;
ClutterActor *child;
if (priv->n_cols < 1)
{
*min_width_p = 0;
*natural_width_p = 0;
return;
}
/* Setting size to zero and then what we want it to be causes a clear if
* clear flag is set (which it should be.)
*/
g_array_set_size (priv->min_widths, 0);
g_array_set_size (priv->pref_widths, 0);
g_array_set_size (priv->min_widths, priv->n_cols);
g_array_set_size (priv->pref_widths, priv->n_cols);
min_widths = (gint *) priv->min_widths->data;
pref_widths = (gint *) priv->pref_widths->data;
/* calculate minimum row widths */
for (child = clutter_actor_get_first_child (self);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gint col, col_span;
gfloat w_min, w_pref;
StTableChild *meta;
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
col_span = meta->col_span;
_st_actor_get_preferred_width (child, -1, meta->y_fill, &w_min, &w_pref);
if (col_span == 1 && w_min > min_widths[col])
min_widths[col] = w_min;
if (col_span == 1 && w_pref > pref_widths[col])
pref_widths[col] = w_pref;
}
total_min_width = (priv->n_cols - 1) * (float) priv->col_spacing;
total_pref_width = total_min_width;
for (i = 0; i < priv->n_cols; i++)
{
total_min_width += min_widths[i];
total_pref_width += pref_widths[i];
}
/* If we were requested width-for-height, then we reported minimum/natural
* heights based on our natural width. If we were allocated less than our
* natural width, then we need more height. So in the width-for-height
* case we need to disable shrinking.
*/
if (for_height >= 0)
total_min_width = total_pref_width;
if (min_width_p)
*min_width_p = total_min_width;
if (natural_width_p)
*natural_width_p = total_pref_width;
st_theme_node_adjust_preferred_width (theme_node, min_width_p, natural_width_p);
}
static void
st_table_preferred_allocate (ClutterActor *self,
const ClutterActorBox *content_box,
gboolean flags)
{
gint row_spacing, col_spacing;
gint i;
gint *col_widths, *row_heights;
StTable *table;
StTablePrivate *priv;
gboolean ltr;
ClutterActor *child;
table = ST_TABLE (self);
priv = ST_TABLE (self)->priv;
col_spacing = (priv->col_spacing);
row_spacing = (priv->row_spacing);
col_widths =
st_table_calculate_col_widths (table,
(int) (content_box->x2 - content_box->x1));
row_heights =
st_table_calculate_row_heights (table,
(int) (content_box->y2 - content_box->y1),
col_widths);
ltr = (clutter_actor_get_text_direction (self) == CLUTTER_TEXT_DIRECTION_LTR);
for (child = clutter_actor_get_first_child (self);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gint row, col, row_span, col_span;
gint col_width, row_height;
StTableChild *meta;
ClutterActorBox childbox;
gint child_x, child_y;
gdouble x_align_f, y_align_f;
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
row = meta->row;
row_span = meta->row_span;
col_span = meta->col_span;
_st_get_align_factors (meta->x_align, meta->y_align,
&x_align_f, &y_align_f);
/* initialise the width and height */
col_width = col_widths[col];
row_height = row_heights[row];
/* Add the widths of the spanned columns:
*
* First check that we have a non-zero span. Then we loop over each of
* the columns that we're spanning but we stop short if we go past the
* number of columns in the table. This is necessary to avoid accessing
* uninitialised memory. We add the spacing in here too since we only
* want to add as much spacing as times we successfully span.
*/
if (col + col_span > priv->n_cols)
g_warning ("StTable: col-span exceeds number of columns");
#if 0
if (row + row_span > priv->n_rows)
g_warning ("StTable: row-span exceeds number of rows");
#endif
if (col_span > 1)
{
for (i = col + 1; i < col + col_span && i < priv->n_cols; i++)
{
col_width += col_widths[i];
col_width += col_spacing;
}
}
/* add the height of the spanned rows */
if (row_span > 1)
{
for (i = row + 1; i < row + row_span && i < priv->n_rows; i++)
{
row_height += row_heights[i];
row_height += row_spacing;
}
}
/* calculate child x */
if (ltr)
{
child_x = (int) content_box->x1
+ col_spacing * col;
for (i = 0; i < col; i++)
child_x += col_widths[i];
}
else
{
child_x = (int) content_box->x2
- col_spacing * col;
for (i = 0; i < col; i++)
child_x -= col_widths[i];
}
/* calculate child y */
child_y = (int) content_box->y1
+ row_spacing * row;
for (i = 0; i < row; i++)
child_y += row_heights[i];
/* set up childbox */
if (ltr)
{
childbox.x1 = (float) child_x;
childbox.x2 = (float) MAX (0, child_x + col_width);
}
else
{
childbox.x2 = (float) child_x;
childbox.x1 = (float) MAX (0, child_x - col_width);
}
childbox.y1 = (float) child_y;
childbox.y2 = (float) MAX (0, child_y + row_height);
clutter_actor_allocate_align_fill (child, &childbox,
x_align_f, y_align_f,
meta->x_fill, meta->y_fill,
flags);
}
}
static gint *
st_table_calculate_row_heights (StTable *table,
gint for_height,
gint * col_widths)
{
StTablePrivate *priv = ST_TABLE (table)->priv;
gint *is_expand_row, *min_heights, *pref_heights, *row_heights, extra_row_height;
gint i, total_min_height;
gint expanded_rows = 0;
gint n_expanded_rows = 0;
ClutterActor *child;
g_array_set_size (priv->row_heights, 0);
g_array_set_size (priv->row_heights, priv->n_rows);
row_heights = (gboolean *) priv->row_heights->data;
g_array_set_size (priv->is_expand_row, 0);
g_array_set_size (priv->is_expand_row, priv->n_rows);
is_expand_row = (gboolean *) priv->is_expand_row->data;
g_array_set_size (priv->min_heights, 0);
g_array_set_size (priv->min_heights, priv->n_rows);
min_heights = (gboolean *) priv->min_heights->data;
g_array_set_size (priv->pref_heights, 0);
g_array_set_size (priv->pref_heights, priv->n_rows);
pref_heights = (gboolean *) priv->pref_heights->data;
for (child = clutter_actor_get_first_child (CLUTTER_ACTOR (table));
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gint row, col, cell_width;
gfloat h_min, h_pref;
gboolean y_expand;
StTableChild *meta;
gint col_span, row_span;
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (table), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
row = meta->row;
y_expand = meta->y_expand;
col_span = meta->col_span;
row_span = meta->row_span;
if (y_expand)
is_expand_row[row] = TRUE;
/* calculate the cell width by including any spanned columns */
cell_width = 0;
for (i = 0; i < col_span && col + i < priv->n_cols; i++)
cell_width += (float)(col_widths[col + i]);
if (!meta->x_fill)
{
gfloat width;
_st_actor_get_preferred_width (child, -1, meta->y_fill, NULL, &width);
cell_width = MIN (cell_width, width);
}
_st_actor_get_preferred_height (child, cell_width, meta->x_fill,
&h_min, &h_pref);
if (row_span == 1 && h_pref > pref_heights[row])
{
pref_heights[row] = (int)(h_pref);
}
if (row_span == 1 && h_min > min_heights[row])
{
min_heights[row] = (int)(h_min);
}
}
total_min_height = 0; // priv->row_spacing * (priv->n_rows - 1);
for (i = 0; i < priv->n_rows; i++)
total_min_height += pref_heights[i];
/* calculate the remaining space and distribute it evenly onto all rows/cols
* with the x/y expand property set. */
for (i = 0; i < priv->n_rows; i++)
if (is_expand_row[i])
{
expanded_rows += pref_heights[i];
n_expanded_rows++;
}
/* extra row height = for height - row spacings - total_min_height */
for_height -= (priv->row_spacing * (priv->n_rows - 1));
extra_row_height = for_height - total_min_height;
if (extra_row_height < 0)
{
gint *skip = g_slice_alloc0 (sizeof (gint) * priv->n_rows);
gint total_shrink_height;
/* If we need to shrink rows, we need to do multiple passes.
*
* We start by assuming all rows can shrink. All rows are sized
* proportional to their height in the total table size. If a row would be
* sized smaller than its minimum size, we mark it as non-shrinkable, and
* reduce extra_row_height by the amount it has been shrunk. The amount
* it has been shrunk by is the difference between the preferred and
* minimum height, since all rows start at their preferred height. We
* also then reduce the total table size (stored in total_shrink_height) by the height
* of the row we are going to be skipping.
*
*/
/* We start by assuming all rows can shrink */
total_shrink_height = total_min_height;
for (i = 0; i < priv->n_rows; i++)
{
if (!skip[i])
{
gint tmp;
/* Calculate the height of the row by starting with the preferred
* height and taking away the extra row height proportional to
* the preferred row height over the rows that are being shrunk
*/
tmp = pref_heights[i]
+ (extra_row_height * (pref_heights[i] / (float) total_shrink_height));
if (tmp < min_heights[i])
{
/* This was a row we *were* set to shrink, but we now find it would have
* been shrunk too much. We remove it from the list of rows to shrink and
* adjust extra_row_height and total_shrink_height appropriately */
skip[i] = TRUE;
row_heights[i] = min_heights[i];
/* Reduce extra_row_height by the amount we have reduced this
* actor by */
extra_row_height += (pref_heights[i] - min_heights[i]);
/* now take off the row from the total shrink height */
total_shrink_height -= pref_heights[i];
/* restart the loop */
i = -1;
}
else
{
skip[i] = FALSE;
row_heights[i] = tmp;
}
}
}
g_slice_free1 (sizeof (gint) * priv->n_rows, skip);
}
else
{
for (i = 0; i < priv->n_rows; i++)
{
if (is_expand_row[i])
row_heights[i] = pref_heights[i] + (extra_row_height / n_expanded_rows);
else
row_heights[i] = pref_heights[i];
}
}
return row_heights;
}
static void
st_table_homogeneous_allocate (ClutterActor *self,
const ClutterActorBox *content_box,
gboolean flags)
{
gfloat col_width, row_height;
gint row_spacing, col_spacing;
StTablePrivate *priv = ST_TABLE (self)->priv;
gboolean ltr = clutter_actor_get_text_direction (self) == CLUTTER_TEXT_DIRECTION_LTR;
ClutterActor *child;
col_spacing = priv->col_spacing;
row_spacing = priv->row_spacing;
col_width = (int) ((content_box->x2 - content_box->x1
- (col_spacing * (priv->n_cols - 1)))
/ priv->n_cols + 0.5);
row_height = (int) ((content_box->y2 - content_box->y1
- (row_spacing * (priv->n_rows - 1)))
/ priv->n_rows + 0.5);
for (child = clutter_actor_get_first_child (self);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gint row, col, row_span, col_span;
StTableChild *meta;
ClutterActorBox childbox;
gdouble x_align_f, y_align_f;
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
row = meta->row;
row_span = meta->row_span;
col_span = meta->col_span;
_st_get_align_factors (meta->x_align, meta->y_align,
&x_align_f, &y_align_f);
if (ltr)
{
childbox.x1 = content_box->x1 + (col_width + col_spacing) * col;
childbox.x2 = childbox.x1 + (col_width * col_span) + (col_spacing * (col_span - 1));
}
else
{
childbox.x2 = content_box->x2 - (col_width + col_spacing) * col;
childbox.x1 = childbox.x2 - (col_width * col_span) - (col_spacing * (col_span - 1));
}
childbox.y1 = content_box->y1 + (row_height + row_spacing) * row;
childbox.y2 = childbox.y1 + (row_height * row_span) + (row_spacing * (row_span - 1));
clutter_actor_allocate_align_fill (child, &childbox,
x_align_f, y_align_f,
meta->x_fill, meta->y_fill,
flags);
}
}
static void
st_table_homogeneous_allocate (ClutterActor *self,
const ClutterActorBox *content_box,
gboolean flags)
{
GList *list, *children;
gfloat col_width, row_height;
gint row_spacing, col_spacing;
StTablePrivate *priv = ST_TABLE (self)->priv;
gboolean ltr = st_widget_get_direction (ST_WIDGET (self)) == ST_TEXT_DIRECTION_LTR;
col_spacing = priv->col_spacing;
row_spacing = priv->row_spacing;
col_width = (int) ((content_box->x2 - content_box->x1
- (col_spacing * (priv->n_cols - 1)))
/ priv->n_cols + 0.5);
row_height = (int) ((content_box->y2 - content_box->y1
- (row_spacing * (priv->n_rows - 1)))
/ priv->n_rows + 0.5);
children = st_container_get_children_list (ST_CONTAINER (self));
for (list = children; list; list = list->next)
{
gint row, col, row_span, col_span;
StTableChild *meta;
ClutterActor *child;
ClutterActorBox childbox;
StAlign x_align, y_align;
gboolean x_fill, y_fill;
child = CLUTTER_ACTOR (list->data);
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
row = meta->row;
row_span = meta->row_span;
col_span = meta->col_span;
x_align = meta->x_align;
y_align = meta->y_align;
x_fill = meta->x_fill;
y_fill = meta->y_fill;
if (ltr)
{
childbox.x1 = content_box->x1 + (col_width + col_spacing) * col;
childbox.x2 = childbox.x1 + (col_width * col_span) + (col_spacing * (col_span - 1));
}
else
{
childbox.x2 = content_box->x2 - (col_width + col_spacing) * col;
childbox.x1 = childbox.x2 - (col_width * col_span) - (col_spacing * (col_span - 1));
}
childbox.y1 = content_box->y1 + (row_height + row_spacing) * row;
childbox.y2 = childbox.y1 + (row_height * row_span) + (row_spacing * (row_span - 1));
_st_allocate_fill (ST_WIDGET (self), child, &childbox,
x_align, y_align, x_fill, y_fill);
clutter_actor_allocate (child, &childbox, flags);
}
}
static void
st_table_calculate_row_heights (StTable *table,
gint for_height)
{
StTablePrivate *priv = ST_TABLE (table)->priv;
GList *list, *children;
gint i;
DimensionData *rows, *columns;
g_array_set_size (priv->rows, 0);
g_array_set_size (priv->rows, priv->n_rows);
rows = &g_array_index (priv->rows, DimensionData, 0);
columns = &g_array_index (priv->columns, DimensionData, 0);
/* Reset the visible rows */
priv->visible_rows = 0;
for (i = 0; i < priv->n_rows; i++)
rows[i].is_visible = FALSE;
/* STAGE ONE: calculate row heights for non-spanned children */
children = st_container_get_children_list (ST_CONTAINER (table));
for (list = children; list; list = list->next)
{
StTableChild *meta;
ClutterActor *child;
DimensionData *row;
gfloat c_min, c_pref;
child = CLUTTER_ACTOR (list->data);
meta = (StTableChild *)
clutter_container_get_child_meta (CLUTTER_CONTAINER (table), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
if (meta->row_span > 1)
continue;
row = &rows[meta->row];
/* If this child is visible, then its row is visible */
if (!row->is_visible)
{
row->is_visible = TRUE;
priv->visible_rows++;
}
_st_actor_get_preferred_height (child, columns[meta->col].final_size,
meta->x_fill, &c_min, &c_pref);
row->min_size = MAX (row->min_size, c_min);
row->final_size = row->pref_size = MAX (row->pref_size, c_pref);
row->expand = MAX (row->expand, meta->y_expand);
}
/* STAGE TWO: take spanning children into account */
for (list = children; list; list = list->next)
{
StTableChild *meta;
ClutterActor *child;
gfloat c_min, c_pref;
gfloat min_height, pref_height;
gint start_row, end_row;
gint n_expand;
child = CLUTTER_ACTOR (list->data);
meta = (StTableChild *)
clutter_container_get_child_meta (CLUTTER_CONTAINER (table), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
if (meta->row_span < 2)
continue;
start_row = meta->row;
end_row = meta->row + meta->row_span - 1;
_st_actor_get_preferred_height (child, columns[meta->col].final_size,
meta->x_fill, &c_min, &c_pref);
/* check there is enough room for this actor */
min_height = 0;
pref_height = 0;
n_expand = 0;
for (i = start_row; i <= end_row; i++)
{
min_height += rows[i].min_size;
pref_height += rows[i].pref_size;
if (rows[i].expand)
{
n_expand++;
}
/* If this actor is visible, then all the rows is spans are visible */
if (!rows[i].is_visible)
{
rows[i].is_visible = TRUE;
priv->visible_rows++;
}
rows[i].expand = MAX (rows[i].expand, meta->y_expand);
}
min_height += priv->row_spacing * (meta->row_span - 1);
pref_height += priv->row_spacing * (meta->row_span - 1);
/* 1) If the minimum height of the rows spanned is less than the minimum
* height of the child that is spanning them, then we must increase the
* minimum height of the rows spanned.
*
* 2) If the preferred height of the spanned rows is more that the minimum
* height of the spanning child, then we can start at this size and
* decrease each row evenly.
*
* 3) If the preferred height of the rows is more than the minimum height
* of the spanned child, then we can start at the preferred height and
* expand.
*/
/* (1) */
if (c_min > min_height)
{
/* (2) */
/* we can start from preferred height and decrease */
if (pref_height > c_min)
{
for (i = start_row; i <= end_row; i++)
{
rows[i].final_size = rows[i].pref_size;
}
while (pref_height > c_min)
{
for (i = start_row; i <= end_row; i++)
{
if (rows[i].final_size > rows[i].min_size)
{
rows[i].final_size--;
pref_height--;
}
}
}
for (i = start_row; i <= end_row; i++)
{
rows[i].min_size = rows[i].final_size;
}
}
else
{
/* (3) */
/* we can expand from preferred size */
gfloat expand_by;
expand_by = c_pref - pref_height;
for (i = start_row; i <= end_row; i++)
{
if (n_expand)
{
if (rows[i].expand)
rows[i].min_size =
rows[i].pref_size + expand_by / n_expand;
}
else
{
rows[i].min_size =
rows[i].pref_size + expand_by / meta->row_span;
}
}
}
}
}
/* calculate final heights */
if (for_height >= 0)
{
gfloat min_height, pref_height;
gint n_expand;
min_height = 0;
pref_height = 0;
n_expand = 0;
for (i = 0; i < priv->n_rows; i++)
{
pref_height += rows[i].pref_size;
min_height += rows[i].min_size;
if (rows[i].expand)
n_expand++;
}
pref_height += priv->row_spacing * (priv->n_rows - 1);
min_height += priv->row_spacing * (priv->n_rows - 1);
if (for_height <= min_height)
{
/* erk, we can't shrink this! */
for (i = 0; i < priv->n_rows; i++)
{
rows[i].final_size = rows[i].min_size;
}
return;
}
if (for_height == pref_height)
{
/* perfect! */
for (i = 0; i < priv->n_rows; i++)
{
rows[i].final_size = rows[i].pref_size;
}
return;
}
/* for_height is between min_height and pref_height */
if (for_height < pref_height && for_height > min_height)
{
gfloat height;
/* shrink rows until they reach min_height */
/* start with all rows at preferred size */
for (i = 0; i < priv->n_rows; i++)
{
rows[i].final_size = rows[i].pref_size;
}
height = pref_height;
while (height > for_height)
{
for (i = 0; i < priv->n_rows; i++)
{
if (rows[i].final_size > rows[i].min_size)
{
rows[i].final_size--;
height--;
}
}
}
return;
}
/* expand rows */
if (for_height > pref_height)
{
gfloat extra_height = for_height - pref_height;
gint remaining;
if (n_expand)
remaining = (gint) extra_height % n_expand;
else
remaining = (gint) extra_height % priv->n_rows;
for (i = 0; i < priv->n_rows; i++)
{
if (rows[i].expand)
rows[i].final_size =
rows[i].pref_size + (extra_height / n_expand);
else if (!n_expand)
rows[i].final_size =
rows[i].pref_size + (extra_height / priv->n_rows);
else
rows[i].final_size = rows[i].pref_size;
}
/* distribute the remainder among children */
i = 0;
while (remaining)
{
if (rows[i].expand || !n_expand)
{
rows[i].final_size++;
remaining--;
}
i++;
}
}
}
}
static void
table_child_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
StTableChild *child = ST_TABLE_CHILD (gobject);
StTable *table = ST_TABLE (CLUTTER_CHILD_META(gobject)->container);
switch (prop_id)
{
case CHILD_PROP_COL:
child->col = g_value_get_int (value);
_st_table_update_row_col (table, -1, child->col);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_ROW:
child->row = g_value_get_int (value);
_st_table_update_row_col (table, child->row, -1);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_COL_SPAN:
child->col_span = g_value_get_int (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_ROW_SPAN:
child->row_span = g_value_get_int (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_X_EXPAND:
child->x_expand = g_value_get_boolean (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_Y_EXPAND:
child->y_expand = g_value_get_boolean (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_X_ALIGN:
child->x_align = g_value_get_enum (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_Y_ALIGN:
child->y_align = g_value_get_enum (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_X_FILL:
child->x_fill = g_value_get_boolean (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_Y_FILL:
child->y_fill = g_value_get_boolean (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
case CHILD_PROP_ALLOCATE_HIDDEN:
child->allocate_hidden = g_value_get_boolean (value);
clutter_actor_queue_relayout (CLUTTER_ACTOR (table));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
st_table_preferred_allocate (ClutterActor *self,
const ClutterActorBox *content_box,
gboolean flags)
{
GList *list, *children;
gint row_spacing, col_spacing;
gint i;
StTable *table;
StTablePrivate *priv;
gboolean ltr;
DimensionData *rows, *columns;
table = ST_TABLE (self);
priv = ST_TABLE (self)->priv;
col_spacing = (priv->col_spacing);
row_spacing = (priv->row_spacing);
st_table_calculate_dimensions (table,
content_box->x2 - content_box->x1,
content_box->y2 - content_box->y1);
ltr = (st_widget_get_direction (ST_WIDGET (self)) == ST_TEXT_DIRECTION_LTR);
rows = &g_array_index (priv->rows, DimensionData, 0);
columns = &g_array_index (priv->columns, DimensionData, 0);
children = st_container_get_children_list (ST_CONTAINER (self));
for (list = children; list; list = list->next)
{
gint row, col, row_span, col_span;
gint col_width, row_height;
StTableChild *meta;
ClutterActor *child;
ClutterActorBox childbox;
gint child_x, child_y;
StAlign x_align, y_align;
gboolean x_fill, y_fill;
child = CLUTTER_ACTOR (list->data);
meta = (StTableChild *) clutter_container_get_child_meta (CLUTTER_CONTAINER (self), child);
if (!meta->allocate_hidden && !CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
/* get child properties */
col = meta->col;
row = meta->row;
row_span = meta->row_span;
col_span = meta->col_span;
x_align = meta->x_align;
y_align = meta->y_align;
x_fill = meta->x_fill;
y_fill = meta->y_fill;
/* initialise the width and height */
col_width = columns[col].final_size;
row_height = rows[row].final_size;
/* Add the widths of the spanned columns:
*
* First check that we have a non-zero span. Then we loop over each of
* the columns that we're spanning but we stop short if we go past the
* number of columns in the table. This is necessary to avoid accessing
* uninitialised memory. We add the spacing in here too since we only
* want to add as much spacing as times we successfully span.
*/
if (col + col_span > priv->n_cols)
g_warning ("StTable: the child at %d,%d's col-span, %d, exceeds number of columns, %d",
col, row, col_span, priv->n_cols);
if (row + row_span > priv->n_rows)
g_warning ("StTable: the child at %d,%d's row-span, %d, exceeds number of rows, %d",
col, row, row_span, priv->n_rows);
if (col_span > 1)
{
for (i = col + 1; i < col + col_span && i < priv->n_cols; i++)
{
col_width += columns[i].final_size;
col_width += col_spacing;
}
}
/* add the height of the spanned rows */
if (row_span > 1)
{
for (i = row + 1; i < row + row_span && i < priv->n_rows; i++)
{
row_height += rows[i].final_size;
row_height += row_spacing;
}
}
/* calculate child x */
if (ltr)
{
child_x = (int) content_box->x1
+ col_spacing * col;
for (i = 0; i < col; i++)
child_x += columns[i].final_size;
}
else
{
child_x = (int) content_box->x2
- col_spacing * col;
for (i = 0; i < col; i++)
child_x -= columns[i].final_size;
}
/* calculate child y */
child_y = (int) content_box->y1
+ row_spacing * row;
for (i = 0; i < row; i++)
child_y += rows[i].final_size;
/* set up childbox */
if (ltr)
{
childbox.x1 = (float) child_x;
childbox.x2 = (float) MAX (0, child_x + col_width);
}
else
{
childbox.x2 = (float) child_x;
childbox.x1 = (float) MAX (0, child_x - col_width);
}
childbox.y1 = (float) child_y;
childbox.y2 = (float) MAX (0, child_y + row_height);
_st_allocate_fill (ST_WIDGET (self), child, &childbox,
x_align, y_align, x_fill, y_fill);
clutter_actor_allocate (child, &childbox, flags);
}
}
