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gtk2/gtk/gtkgridview.c
Matthias Clasen 8d79a32c50 list widgets: Use selection models in the api 
Change the apis in GtkListView, GtkColumnView and
GtkGridView to be explicitly about GtkSelectionModel,
to make it obvious that the widgets handle selection.

Update all users.
2020-08-31 17:15:05 -04:00

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/*
* Copyright © 2019 Benjamin Otte
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkgridview.h"
#include "gtkbitset.h"
#include "gtkintl.h"
#include "gtklistbaseprivate.h"
#include "gtklistitemfactory.h"
#include "gtklistitemmanagerprivate.h"
#include "gtkmain.h"
#include "gtkprivate.h"
#include "gtksingleselection.h"
#include "gtkwidgetprivate.h"
/* Maximum number of list items created by the gridview.
* For debugging, you can set this to G_MAXUINT to ensure
* there's always a list item for every row.
*
* We multiply this number with GtkGridView:max-columns so
* that we can always display at least this many rows.
*/
#define GTK_GRID_VIEW_MAX_VISIBLE_ROWS (30)
#define DEFAULT_MAX_COLUMNS (7)
/**
* SECTION:gtkgridview
* @title: GtkGridView
* @short_description: A widget for displaying grids
* @see_also: #GtkSelectionModel, #GtkListView, #GtkColumnView
*
* GtkGridView is a widget to present a view into a large dynamic grid of items.
*
* GtkGridView uses its factory to generate one child widget for each visible item
* and shows them in a grid. The orientation of the grid view determines if the
* grid reflows vertically or horizontally.
*
* GtkGridView allows the user to select items according to the selection
* characteristics of the model. If the provided model is not a #GtkSelectionModel,
* GtkGridView will wrap it in a #GtkSingleSelection. For models that allow
* multiple selected items, it is possible to turn on _rubberband selection_,
* using #GtkGridView:enable-rubberband.
*
* To learn more about the list widget framework, see the [overview](#ListWidget).
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* gridview
* ├── child
* │
* ├── child
* │
* ┊
* ╰── [rubberband]
* ]|
*
* GtkGridView uses a single CSS node with name gridview. Each child
* uses a single CSS node with name child. For rubberband selection,
* a subnode with name rubberband is used.
*/
typedef struct _Cell Cell;
typedef struct _CellAugment CellAugment;
struct _GtkGridView
{
GtkListBase parent_instance;
GtkListItemManager *item_manager;
guint min_columns;
guint max_columns;
/* set in size_allocate */
guint n_columns;
int unknown_row_height;
double column_width;
};
struct _GtkGridViewClass
{
GtkListBaseClass parent_class;
};
struct _Cell
{
GtkListItemManagerItem parent;
guint size; /* total, only counting cells in first column */
};
struct _CellAugment
{
GtkListItemManagerItemAugment parent;
guint size; /* total, only counting first column */
};
enum
{
PROP_0,
PROP_FACTORY,
PROP_MAX_COLUMNS,
PROP_MIN_COLUMNS,
PROP_MODEL,
PROP_SINGLE_CLICK_ACTIVATE,
PROP_ENABLE_RUBBERBAND,
N_PROPS
};
enum {
ACTIVATE,
LAST_SIGNAL
};
G_DEFINE_TYPE (GtkGridView, gtk_grid_view, GTK_TYPE_LIST_BASE)
static GParamSpec *properties[N_PROPS] = { NULL, };
static guint signals[LAST_SIGNAL] = { 0 };
static void G_GNUC_UNUSED
dump (GtkGridView *self)
{
Cell *cell;
guint n_widgets, n_list_rows, n_items;
n_widgets = 0;
n_list_rows = 0;
n_items = 0;
//g_print ("ANCHOR: %u - %u\n", self->anchor_start, self->anchor_end);
for (cell = gtk_list_item_manager_get_first (self->item_manager);
cell;
cell = gtk_rb_tree_node_get_next (cell))
{
if (cell->parent.widget)
n_widgets++;
n_list_rows++;
n_items += cell->parent.n_items;
g_print ("%6u%6u %5ux%3u %s (%upx)\n",
cell->parent.n_items, n_items,
n_items / (self->n_columns ? self->n_columns : self->min_columns),
n_items % (self->n_columns ? self->n_columns : self->min_columns),
cell->parent.widget ? " (widget)" : "", cell->size);
}
g_print (" => %u widgets in %u list rows\n", n_widgets, n_list_rows);
}
static void
cell_augment (GtkRbTree *tree,
gpointer node_augment,
gpointer node,
gpointer left,
gpointer right)
{
Cell *cell = node;
CellAugment *aug = node_augment;
gtk_list_item_manager_augment_node (tree, node_augment, node, left, right);
aug->size = cell->size;
if (left)
{
CellAugment *left_aug = gtk_rb_tree_get_augment (tree, left);
aug->size += left_aug->size;
}
if (right)
{
CellAugment *right_aug = gtk_rb_tree_get_augment (tree, right);
aug->size += right_aug->size;
}
}
/*<private>
* gtk_grid_view_get_cell_at_y:
* @self: a #GtkGridView
* @y: an offset in direction of @self's orientation
* @position: (out caller-allocates) (optional): stores the position
* index of the returned row
* @offset: (out caller-allocates) (optional): stores the offset
* in pixels between y and top of cell.
* @offset: (out caller-allocates) (optional): stores the height
* of the cell
*
* Gets the Cell that occupies the leftmost position in the row at offset
* @y into the primary direction.
*
* If y is larger than the height of all cells, %NULL will be returned.
* In particular that means that for an empty grid, %NULL is returned
* for any value.
*
* Returns: (nullable): The first cell at offset y or %NULL if none
**/
static Cell *
gtk_grid_view_get_cell_at_y (GtkGridView *self,
int y,
guint *position,
int *offset,
int *size)
{
Cell *cell, *tmp;
guint pos;
cell = gtk_list_item_manager_get_root (self->item_manager);
pos = 0;
while (cell)
{
tmp = gtk_rb_tree_node_get_left (cell);
if (tmp)
{
CellAugment *aug = gtk_list_item_manager_get_item_augment (self->item_manager, tmp);
if (y < aug->size)
{
cell = tmp;
continue;
}
y -= aug->size;
pos += aug->parent.n_items;
}
if (y < cell->size)
break;
y -= cell->size;
pos += cell->parent.n_items;
cell = gtk_rb_tree_node_get_right (cell);
}
if (cell == NULL)
{
if (position)
*position = 0;
if (offset)
*offset = 0;
if (size)
*size = 0;
return NULL;
}
/* We know have the (range of) cell(s) that contains this offset.
* Now for the hard part of computing which index this actually is.
*/
if (offset || position || size)
{
guint n_items = cell->parent.n_items;
guint no_widget_rows, skip;
/* skip remaining items at end of row */
if (pos % self->n_columns)
{
skip = self->n_columns - pos % self->n_columns;
if (n_items <= skip)
{
g_warning ("ran out of items");
if (position)
*position = 0;
if (offset)
*offset = 0;
if (size)
*size = 0;
return NULL;
}
n_items -= skip;
pos += skip;
}
/* Skip all the rows this index doesn't go into */
no_widget_rows = (n_items - 1) / self->n_columns;
skip = MIN (y / self->unknown_row_height, no_widget_rows);
y -= skip * self->unknown_row_height;
pos += self->n_columns * skip;
if (position)
*position = pos;
if (offset)
*offset = y;
if (size)
{
if (skip < no_widget_rows)
*size = self->unknown_row_height;
else
*size = cell->size - no_widget_rows * self->unknown_row_height;
}
}
return cell;
}
static gboolean
gtk_grid_view_get_allocation_along (GtkListBase *base,
guint pos,
int *offset,
int *size)
{
GtkGridView *self = GTK_GRID_VIEW (base);
Cell *cell, *tmp;
int y;
cell = gtk_list_item_manager_get_root (self->item_manager);
y = 0;
pos -= pos % self->n_columns;
while (cell)
{
tmp = gtk_rb_tree_node_get_left (cell);
if (tmp)
{
CellAugment *aug = gtk_list_item_manager_get_item_augment (self->item_manager, tmp);
if (pos < aug->parent.n_items)
{
cell = tmp;
continue;
}
pos -= aug->parent.n_items;
y += aug->size;
}
if (pos < cell->parent.n_items)
break;
y += cell->size;
pos -= cell->parent.n_items;
cell = gtk_rb_tree_node_get_right (cell);
}
if (cell == NULL)
{
if (offset)
*offset = 0;
if (size)
*size = 0;
return FALSE;
}
/* We know have the (range of) cell(s) that contains this offset.
* Now for the hard part of computing which index this actually is.
*/
if (offset || size)
{
guint n_items = cell->parent.n_items;
guint skip;
/* skip remaining items at end of row */
if (pos % self->n_columns)
{
skip = pos % self->n_columns;
n_items -= skip;
pos -= skip;
}
/* Skip all the rows this index doesn't go into */
skip = pos / self->n_columns;
n_items -= skip * self->n_columns;
y += skip * self->unknown_row_height;
if (offset)
*offset = y;
if (size)
{
if (n_items > self->n_columns)
*size = self->unknown_row_height;
else
*size = cell->size - skip * self->unknown_row_height;
}
}
return TRUE;
}
static gboolean
gtk_grid_view_get_allocation_across (GtkListBase *base,
guint pos,
int *offset,
int *size)
{
GtkGridView *self = GTK_GRID_VIEW (base);
guint start;
pos %= self->n_columns;
start = ceil (self->column_width * pos);
if (offset)
*offset = start;
if (size)
*size = ceil (self->column_width * (pos + 1)) - start;
return TRUE;
}
static gboolean
gtk_grid_view_get_position_from_allocation (GtkListBase *base,
int across,
int along,
guint *position,
cairo_rectangle_int_t *area)
{
GtkGridView *self = GTK_GRID_VIEW (base);
int offset, size;
guint pos, n_items;
if (across >= self->column_width * self->n_columns)
return FALSE;
n_items = gtk_list_base_get_n_items (base);
if (!gtk_grid_view_get_cell_at_y (self,
along,
&pos,
&offset,
&size))
return FALSE;
pos += floor (across / self->column_width);
if (pos >= n_items)
{
/* Ugh, we're in the last row and don't have enough items
* to fill the row.
* Do it the hard way then... */
pos = n_items - 1;
}
*position = pos;
if (area)
{
area->x = ceil (self->column_width * (pos % self->n_columns));
area->width = ceil (self->column_width * (1 + pos % self->n_columns)) - area->x;
area->y = along - offset;
area->height = size;
}
return TRUE;
}
static GtkBitset *
gtk_grid_view_get_items_in_rect (GtkListBase *base,
const GdkRectangle *rect)
{
GtkGridView *self = GTK_GRID_VIEW (base);
guint first_row, last_row, first_column, last_column, n_items;
GtkBitset *result;
result = gtk_bitset_new_empty ();
n_items = gtk_list_base_get_n_items (base);
if (n_items == 0)
return result;
first_column = floor (rect->x / self->column_width);
last_column = floor ((rect->x + rect->width) / self->column_width);
if (!gtk_grid_view_get_cell_at_y (self, rect->y, &first_row, NULL, NULL))
first_row = rect->y < 0 ? 0 : n_items - 1;
if (!gtk_grid_view_get_cell_at_y (self, rect->y + rect->height, &last_row, NULL, NULL))
last_row = rect->y < 0 ? 0 : n_items - 1;
gtk_bitset_add_rectangle (result,
first_row + first_column,
last_column - first_column + 1,
(last_row - first_row) / self->n_columns + 1,
self->n_columns);
return result;
}
static guint
gtk_grid_view_move_focus_along (GtkListBase *base,
guint pos,
int steps)
{
GtkGridView *self = GTK_GRID_VIEW (base);
steps *= self->n_columns;
if (steps < 0)
{
if (pos >= self->n_columns)
pos -= MIN (pos, -steps);
}
else
{
guint n_items = gtk_list_base_get_n_items (base);
if (n_items / self->n_columns > pos / self->n_columns)
pos += MIN (n_items - pos - 1, steps);
}
return pos;
}
static guint
gtk_grid_view_move_focus_across (GtkListBase *base,
guint pos,
int steps)
{
if (steps < 0)
return pos - MIN (pos, -steps);
else
{
guint n_items = gtk_list_base_get_n_items (base);
pos += MIN (n_items - pos - 1, steps);
}
return pos;
}
static int
compare_ints (gconstpointer first,
gconstpointer second)
{
return *(int *) first - *(int *) second;
}
static int
gtk_grid_view_get_unknown_row_size (GtkGridView *self,
GArray *heights)
{
g_return_val_if_fail (heights->len > 0, 0);
/* return the median and hope rows are generally uniform with few outliers */
g_array_sort (heights, compare_ints);
return g_array_index (heights, int, heights->len / 2);
}
static void
gtk_grid_view_measure_column_size (GtkGridView *self,
int *minimum,
int *natural)
{
GtkOrientation opposite;
Cell *cell;
int min, nat, child_min, child_nat;
min = 0;
nat = 0;
opposite = gtk_list_base_get_opposite_orientation (GTK_LIST_BASE (self));
for (cell = gtk_list_item_manager_get_first (self->item_manager);
cell != NULL;
cell = gtk_rb_tree_node_get_next (cell))
{
/* ignore unavailable cells */
if (cell->parent.widget == NULL)
continue;
gtk_widget_measure (cell->parent.widget,
opposite, -1,
&child_min, &child_nat, NULL, NULL);
min = MAX (min, child_min);
nat = MAX (nat, child_nat);
}
*minimum = min;
*natural = nat;
}
static void
gtk_grid_view_measure_across (GtkWidget *widget,
int for_size,
int *minimum,
int *natural)
{
GtkGridView *self = GTK_GRID_VIEW (widget);
gtk_grid_view_measure_column_size (self, minimum, natural);
*minimum *= self->min_columns;
*natural *= self->max_columns;
}
static guint
gtk_grid_view_compute_n_columns (GtkGridView *self,
guint for_size,
int min,
int nat)
{
guint n_columns;
/* rounding down is exactly what we want here, so int division works */
if (gtk_list_base_get_scroll_policy (GTK_LIST_BASE (self),
gtk_list_base_get_opposite_orientation (GTK_LIST_BASE (self))) == GTK_SCROLL_MINIMUM)
n_columns = for_size / MAX (1, min);
else
n_columns = for_size / MAX (1, nat);
n_columns = CLAMP (n_columns, self->min_columns, self->max_columns);
return n_columns;
}
static void
gtk_grid_view_measure_list (GtkWidget *widget,
int for_size,
int *minimum,
int *natural)
{
GtkGridView *self = GTK_GRID_VIEW (widget);
GtkScrollablePolicy scroll_policy;
Cell *cell;
int height, row_height, child_min, child_nat, column_size, col_min, col_nat;
gboolean measured;
GArray *heights;
guint n_unknown, n_columns;
guint i;
scroll_policy = gtk_list_base_get_scroll_policy (GTK_LIST_BASE (self), gtk_list_base_get_orientation (GTK_LIST_BASE (self)));
heights = g_array_new (FALSE, FALSE, sizeof (int));
n_unknown = 0;
height = 0;
gtk_grid_view_measure_column_size (self, &col_min, &col_nat);
for_size = MAX (for_size, col_min * (int) self->min_columns);
n_columns = gtk_grid_view_compute_n_columns (self, for_size, col_min, col_nat);
column_size = for_size / n_columns;
i = 0;
row_height = 0;
measured = FALSE;
for (cell = gtk_list_item_manager_get_first (self->item_manager);
cell != NULL;
cell = gtk_rb_tree_node_get_next (cell))
{
if (cell->parent.widget)
{
gtk_widget_measure (cell->parent.widget,
gtk_list_base_get_orientation (GTK_LIST_BASE (self)),
column_size,
&child_min, &child_nat, NULL, NULL);
if (scroll_policy == GTK_SCROLL_MINIMUM)
row_height = MAX (row_height, child_min);
else
row_height = MAX (row_height, child_nat);
measured = TRUE;
}
i += cell->parent.n_items;
if (i >= n_columns)
{
if (measured)
{
g_array_append_val (heights, row_height);
i -= n_columns;
height += row_height;
measured = FALSE;
row_height = 0;
}
n_unknown += i / n_columns;
i %= n_columns;
}
}
if (i > 0)
{
if (measured)
{
g_array_append_val (heights, row_height);
height += row_height;
}
else
n_unknown++;
}
if (n_unknown)
height += n_unknown * gtk_grid_view_get_unknown_row_size (self, heights);
g_array_free (heights, TRUE);
*minimum = height;
*natural = height;
}
static void
gtk_grid_view_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkGridView *self = GTK_GRID_VIEW (widget);
if (orientation == gtk_list_base_get_orientation (GTK_LIST_BASE (self)))
gtk_grid_view_measure_list (widget, for_size, minimum, natural);
else
gtk_grid_view_measure_across (widget, for_size, minimum, natural);
}
static void
cell_set_size (Cell *cell,
guint size)
{
if (cell->size == size)
return;
cell->size = size;
gtk_rb_tree_node_mark_dirty (cell);
}
static int
gtk_grid_view_compute_total_height (GtkGridView *self)
{
Cell *cell;
CellAugment *aug;
cell = gtk_list_item_manager_get_root (self->item_manager);
if (cell == NULL)
return 0;
aug = gtk_list_item_manager_get_item_augment (self->item_manager, cell);
return aug->size;
}
static void
gtk_grid_view_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkGridView *self = GTK_GRID_VIEW (widget);
Cell *cell, *start;
GArray *heights;
int min_row_height, row_height, col_min, col_nat;
GtkOrientation orientation, opposite_orientation;
GtkScrollablePolicy scroll_policy;
gboolean known;
int x, y;
guint i;
orientation = gtk_list_base_get_orientation (GTK_LIST_BASE (self));
scroll_policy = gtk_list_base_get_scroll_policy (GTK_LIST_BASE (self), orientation);
opposite_orientation = OPPOSITE_ORIENTATION (orientation);
min_row_height = ceil ((double) height / GTK_GRID_VIEW_MAX_VISIBLE_ROWS);
/* step 0: exit early if list is empty */
if (gtk_list_item_manager_get_root (self->item_manager) == NULL)
return;
/* step 1: determine width of the list */
gtk_grid_view_measure_column_size (self, &col_min, &col_nat);
self->n_columns = gtk_grid_view_compute_n_columns (self,
orientation == GTK_ORIENTATION_VERTICAL ? width : height,
col_min, col_nat);
self->column_width = (orientation == GTK_ORIENTATION_VERTICAL ? width : height) / self->n_columns;
self->column_width = MAX (self->column_width, col_min);
/* step 2: determine height of known rows */
heights = g_array_new (FALSE, FALSE, sizeof (int));
i = 0;
row_height = 0;
start = NULL;
for (cell = gtk_list_item_manager_get_first (self->item_manager);
cell != NULL;
cell = gtk_rb_tree_node_get_next (cell))
{
if (i == 0)
start = cell;
if (cell->parent.widget)
{
int min, nat, size;
gtk_widget_measure (cell->parent.widget,
gtk_list_base_get_orientation (GTK_LIST_BASE (self)),
self->column_width,
&min, &nat, NULL, NULL);
if (scroll_policy == GTK_SCROLL_MINIMUM)
size = min;
else
size = nat;
size = MAX (size, min_row_height);
g_array_append_val (heights, size);
row_height = MAX (row_height, size);
}
cell_set_size (cell, 0);
i += cell->parent.n_items;
if (i >= self->n_columns)
{
i %= self->n_columns;
cell_set_size (start, start->size + row_height);
start = cell;
row_height = 0;
}
}
if (i > 0)
cell_set_size (start, start->size + row_height);
/* step 3: determine height of rows with only unknown items */
self->unknown_row_height = gtk_grid_view_get_unknown_row_size (self, heights);
g_array_free (heights, TRUE);
i = 0;
known = FALSE;
for (start = cell = gtk_list_item_manager_get_first (self->item_manager);
cell != NULL;
cell = gtk_rb_tree_node_get_next (cell))
{
if (i == 0)
start = cell;
if (cell->parent.widget)
known = TRUE;
i += cell->parent.n_items;
if (i >= self->n_columns)
{
if (!known)
cell_set_size (start, start->size + self->unknown_row_height);
i -= self->n_columns;
known = FALSE;
if (i >= self->n_columns)
{
cell_set_size (cell, cell->size + self->unknown_row_height * (i / self->n_columns));
i %= self->n_columns;
}
start = cell;
}
}
if (i > 0 && !known)
cell_set_size (start, start->size + self->unknown_row_height);
/* step 4: update the adjustments */
gtk_list_base_update_adjustments (GTK_LIST_BASE (self),
self->column_width * self->n_columns,
gtk_grid_view_compute_total_height (self),
gtk_widget_get_size (widget, opposite_orientation),
gtk_widget_get_size (widget, orientation),
&x, &y);
/* step 5: run the size_allocate loop */
x = -x;
y = -y;
i = 0;
row_height = 0;
for (cell = gtk_list_item_manager_get_first (self->item_manager);
cell != NULL;
cell = gtk_rb_tree_node_get_next (cell))
{
if (cell->parent.widget)
{
row_height += cell->size;
gtk_list_base_size_allocate_child (GTK_LIST_BASE (self),
cell->parent.widget,
x + ceil (self->column_width * i),
y,
ceil (self->column_width * (i + 1)) - ceil (self->column_width * i),
row_height);
i++;
if (i >= self->n_columns)
{
y += row_height;
i -= self->n_columns;
row_height = 0;
}
}
else
{
i += cell->parent.n_items;
/* skip remaining row if we didn't start one */
if (i > cell->parent.n_items && i >= self->n_columns)
{
i -= self->n_columns;
y += row_height;
row_height = 0;
}
row_height += cell->size;
/* skip rows that are completely contained by this cell */
if (i >= self->n_columns)
{
guint unknown_rows, unknown_height;
unknown_rows = i / self->n_columns;
unknown_height = unknown_rows * self->unknown_row_height;
row_height -= unknown_height;
y += unknown_height;
i %= self->n_columns;
g_assert (row_height >= 0);
}
}
}
gtk_list_base_allocate_rubberband (GTK_LIST_BASE (widget));
}
static void
gtk_grid_view_dispose (GObject *object)
{
GtkGridView *self = GTK_GRID_VIEW (object);
self->item_manager = NULL;
G_OBJECT_CLASS (gtk_grid_view_parent_class)->dispose (object);
}
static void
gtk_grid_view_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkGridView *self = GTK_GRID_VIEW (object);
switch (property_id)
{
case PROP_FACTORY:
g_value_set_object (value, gtk_list_item_manager_get_factory (self->item_manager));
break;
case PROP_MAX_COLUMNS:
g_value_set_uint (value, self->max_columns);
break;
case PROP_MIN_COLUMNS:
g_value_set_uint (value, self->min_columns);
break;
case PROP_MODEL:
g_value_set_object (value, gtk_list_base_get_model (GTK_LIST_BASE (self)));
break;
case PROP_SINGLE_CLICK_ACTIVATE:
g_value_set_boolean (value, gtk_list_item_manager_get_single_click_activate (self->item_manager));
break;
case PROP_ENABLE_RUBBERBAND:
g_value_set_boolean (value, gtk_list_base_get_enable_rubberband (GTK_LIST_BASE (self)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_grid_view_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkGridView *self = GTK_GRID_VIEW (object);
switch (property_id)
{
case PROP_FACTORY:
gtk_grid_view_set_factory (self, g_value_get_object (value));
break;
case PROP_MAX_COLUMNS:
gtk_grid_view_set_max_columns (self, g_value_get_uint (value));
break;
case PROP_MIN_COLUMNS:
gtk_grid_view_set_min_columns (self, g_value_get_uint (value));
break;
case PROP_MODEL:
gtk_grid_view_set_model (self, g_value_get_object (value));
break;
case PROP_SINGLE_CLICK_ACTIVATE:
gtk_grid_view_set_single_click_activate (self, g_value_get_boolean (value));
break;
case PROP_ENABLE_RUBBERBAND:
gtk_grid_view_set_enable_rubberband (self, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_grid_view_activate_item (GtkWidget *widget,
const char *action_name,
GVariant *parameter)
{
GtkGridView *self = GTK_GRID_VIEW (widget);
guint pos;
if (!g_variant_check_format_string (parameter, "u", FALSE))
return;
g_variant_get (parameter, "u", &pos);
if (pos >= gtk_list_base_get_n_items (GTK_LIST_BASE (self)))
return;
g_signal_emit (widget, signals[ACTIVATE], 0, pos);
}
static void
gtk_grid_view_class_init (GtkGridViewClass *klass)
{
GtkListBaseClass *list_base_class = GTK_LIST_BASE_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
list_base_class->list_item_name = "child";
list_base_class->list_item_size = sizeof (Cell);
list_base_class->list_item_augment_size = sizeof (CellAugment);
list_base_class->list_item_augment_func = cell_augment;
list_base_class->get_allocation_along = gtk_grid_view_get_allocation_along;
list_base_class->get_allocation_across = gtk_grid_view_get_allocation_across;
list_base_class->get_items_in_rect = gtk_grid_view_get_items_in_rect;
list_base_class->get_position_from_allocation = gtk_grid_view_get_position_from_allocation;
list_base_class->move_focus_along = gtk_grid_view_move_focus_along;
list_base_class->move_focus_across = gtk_grid_view_move_focus_across;
widget_class->measure = gtk_grid_view_measure;
widget_class->size_allocate = gtk_grid_view_size_allocate;
gobject_class->dispose = gtk_grid_view_dispose;
gobject_class->get_property = gtk_grid_view_get_property;
gobject_class->set_property = gtk_grid_view_set_property;
/**
* GtkGridView:factory:
*
* Factory for populating list items
*/
properties[PROP_FACTORY] =
g_param_spec_object ("factory",
P_("Factory"),
P_("Factory for populating list items"),
GTK_TYPE_LIST_ITEM_FACTORY,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkGridView:max-columns:
*
* Maximum number of columns per row
*
* If this number is smaller than GtkGridView:min-columns, that value
* is used instead.
*/
properties[PROP_MAX_COLUMNS] =
g_param_spec_uint ("max-columns",
P_("Max columns"),
P_("Maximum number of columns per row"),
1, G_MAXUINT, DEFAULT_MAX_COLUMNS,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkGridView:min-columns:
*
* Minimum number of columns per row
*/
properties[PROP_MIN_COLUMNS] =
g_param_spec_uint ("min-columns",
P_("Min columns"),
P_("Minimum number of columns per row"),
1, G_MAXUINT, 1,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkGridView:model:
*
* Model for the items displayed
*/
properties[PROP_MODEL] =
g_param_spec_object ("model",
P_("Model"),
P_("Model for the items displayed"),
GTK_TYPE_SELECTION_MODEL,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkGridView:single-click-activate:
*
* Activate rows on single click and select them on hover
*/
properties[PROP_SINGLE_CLICK_ACTIVATE] =
g_param_spec_boolean ("single-click-activate",
P_("Single click activate"),
P_("Activate rows on single click"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkGridView:enable-rubberband:
*
* Allow rubberband selection
*/
properties[PROP_ENABLE_RUBBERBAND] =
g_param_spec_boolean ("enable-rubberband",
P_("Enable rubberband selection"),
P_("Allow selecting items by dragging with the mouse"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, N_PROPS, properties);
/**
* GtkGridView::activate:
* @self: The #GtkGridView
* @position: position of item to activate
*
* The ::activate signal is emitted when a cell has been activated by the user,
* usually via activating the GtkGridView|list.activate-item action.
*
* This allows for a convenient way to handle activation in a gridview.
* See GtkListItem:activatable for details on how to use this signal.
*/
signals[ACTIVATE] =
g_signal_new (I_("activate"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__UINT,
G_TYPE_NONE, 1,
G_TYPE_UINT);
g_signal_set_va_marshaller (signals[ACTIVATE],
G_TYPE_FROM_CLASS (gobject_class),
g_cclosure_marshal_VOID__UINTv);
/**
* GtkGridView|list.activate-item:
* @position: position of item to activate
*
* Activates the item given in @position by emitting the GtkGridView::activate
* signal.
*/
gtk_widget_class_install_action (widget_class,
"list.activate-item",
"u",
gtk_grid_view_activate_item);
gtk_widget_class_set_css_name (widget_class, I_("gridview"));
}
static void
gtk_grid_view_init (GtkGridView *self)
{
self->item_manager = gtk_list_base_get_manager (GTK_LIST_BASE (self));
self->min_columns = 1;
self->max_columns = DEFAULT_MAX_COLUMNS;
self->n_columns = 1;
gtk_list_base_set_anchor_max_widgets (GTK_LIST_BASE (self),
self->max_columns * GTK_GRID_VIEW_MAX_VISIBLE_ROWS,
self->max_columns);
gtk_widget_add_css_class (GTK_WIDGET (self), "view");
}
/**
* gtk_grid_view_new:
* @model: (allow-none) (transfer full): the model to use, or %NULL
*
* Creates a new #GtkGridView.
*
* You most likely want to call gtk_grid_view_set_factory() to
* set up a way to map its items to widgets next.
*
* Returns: a new #GtkGridView
**/
GtkWidget *
gtk_grid_view_new (GtkSelectionModel *model)
{
GtkWidget *result;
g_return_val_if_fail (model == NULL || GTK_IS_SELECTION_MODEL (model), NULL);
result = g_object_new (GTK_TYPE_GRID_VIEW,
"model", model,
NULL);
/* consume the reference */
g_clear_object (&model);
return result;
}
/**
* gtk_grid_view_new_with_factory:
* @model: (allow-none) (transfer full): the model to use, or %NULL
* @factory: (allow-none) (transfer full): The factory to populate items with, or %NULL
*
* Creates a new #GtkGridView that uses the given @factory for
* mapping items to widgets.
*
* The function takes ownership of the
* argument, so you can write code like
* ```
* grid_view = gtk_grid_view_new_with_factory (create_model (),
* gtk_builder_list_item_factory_new_from_resource ("/resource.ui"));
* ```
*
* Returns: a new #GtkGridView using the given @factory
**/
GtkWidget *
gtk_grid_view_new_with_factory (GtkSelectionModel *model,
GtkListItemFactory *factory)
{
GtkWidget *result;
g_return_val_if_fail (model == NULL || GTK_IS_SELECTION_MODEL (model), NULL);
g_return_val_if_fail (GTK_IS_LIST_ITEM_FACTORY (factory), NULL);
result = g_object_new (GTK_TYPE_GRID_VIEW,
"model", model,
"factory", factory,
NULL);
/* consume the references */
g_clear_object (&model);
g_clear_object (&factory);
return result;
}
/**
* gtk_grid_view_get_model:
* @self: a #GtkGridView
*
* Gets the model that's currently used to read the items displayed.
*
* Returns: (nullable) (transfer none): The model in use
**/
GtkSelectionModel *
gtk_grid_view_get_model (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), NULL);
return gtk_list_base_get_model (GTK_LIST_BASE (self));
}
/**
* gtk_grid_view_set_model:
* @self: a #GtkGridView
* @model: (allow-none) (transfer none): the model to use or %NULL for none
*
* Sets the #GtkSelectionModel to use for
**/
void
gtk_grid_view_set_model (GtkGridView *self,
GtkSelectionModel *model)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
g_return_if_fail (model == NULL || GTK_IS_SELECTION_MODEL (model));
if (!gtk_list_base_set_model (GTK_LIST_BASE (self), model))
return;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
}
/**
* gtk_grid_view_get_factory:
* @self: a #GtkGridView
*
* Gets the factory that's currently used to populate list items.
*
* Returns: (nullable) (transfer none): The factory in use
**/
GtkListItemFactory *
gtk_grid_view_get_factory (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), NULL);
return gtk_list_item_manager_get_factory (self->item_manager);
}
/**
* gtk_grid_view_set_factory:
* @self: a #GtkGridView
* @factory: (allow-none) (transfer none): the factory to use or %NULL for none
*
* Sets the #GtkListItemFactory to use for populating list items.
**/
void
gtk_grid_view_set_factory (GtkGridView *self,
GtkListItemFactory *factory)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
g_return_if_fail (factory == NULL || GTK_LIST_ITEM_FACTORY (factory));
if (factory == gtk_list_item_manager_get_factory (self->item_manager))
return;
gtk_list_item_manager_set_factory (self->item_manager, factory);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_FACTORY]);
}
/**
* gtk_grid_view_get_max_columns:
* @self: a #GtkGridView
*
* Gets the maximum number of columns that the grid will use.
*
* Returns: The maximum number of columns
**/
guint
gtk_grid_view_get_max_columns (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), DEFAULT_MAX_COLUMNS);
return self->max_columns;
}
/**
* gtk_grid_view_set_max_columns:
* @self: a #GtkGridView
* @max_columns: The maximum number of columns
*
* Sets the maximum number of columns to use. This number must be at least 1.
*
* If @max_columns is smaller than the minimum set via
* gtk_grid_view_set_min_columns(), that value is used instead.
**/
void
gtk_grid_view_set_max_columns (GtkGridView *self,
guint max_columns)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
g_return_if_fail (max_columns > 0);
if (self->max_columns == max_columns)
return;
self->max_columns = max_columns;
gtk_list_base_set_anchor_max_widgets (GTK_LIST_BASE (self),
self->max_columns * GTK_GRID_VIEW_MAX_VISIBLE_ROWS,
self->max_columns);
gtk_widget_queue_resize (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MAX_COLUMNS]);
}
/**
* gtk_grid_view_get_min_columns:
* @self: a #GtkGridView
*
* Gets the minimum number of columns that the grid will use.
*
* Returns: The minimum number of columns
**/
guint
gtk_grid_view_get_min_columns (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), 1);
return self->min_columns;
}
/**
* gtk_grid_view_set_min_columns:
* @self: a #GtkGridView
* @min_columns: The minimum number of columns
*
* Sets the minimum number of columns to use. This number must be at least 1.
*
* If @min_columns is smaller than the minimum set via
* gtk_grid_view_set_max_columns(), that value is ignored.
**/
void
gtk_grid_view_set_min_columns (GtkGridView *self,
guint min_columns)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
g_return_if_fail (min_columns > 0);
if (self->min_columns == min_columns)
return;
self->min_columns = min_columns;
gtk_widget_queue_resize (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MIN_COLUMNS]);
}
/**
* gtk_grid_view_set_single_click_activate:
* @self: a #GtkGridView
* @single_click_activate: %TRUE to activate items on single click
*
* Sets whether items should be activated on single click and
* selected on hover.
*/
void
gtk_grid_view_set_single_click_activate (GtkGridView *self,
gboolean single_click_activate)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
if (single_click_activate == gtk_list_item_manager_get_single_click_activate (self->item_manager))
return;
gtk_list_item_manager_set_single_click_activate (self->item_manager, single_click_activate);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SINGLE_CLICK_ACTIVATE]);
}
/**
* gtk_grid_view_get_single_click_activate:
* @self: a #GtkListView
*
* Returns whether items will be activated on single click and
* selected on hover.
*
* Returns: %TRUE if items are activated on single click
*/
gboolean
gtk_grid_view_get_single_click_activate (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), FALSE);
return gtk_list_item_manager_get_single_click_activate (self->item_manager);
}
/**
* gtk_grid_view_set_enable_rubberband:
* @self: a #GtkGridView
* @enable_rubberband: %TRUE to enable rubberband selection
*
* Sets whether selections can be changed by dragging with the mouse.
*/
void
gtk_grid_view_set_enable_rubberband (GtkGridView *self,
gboolean enable_rubberband)
{
g_return_if_fail (GTK_IS_GRID_VIEW (self));
if (enable_rubberband == gtk_list_base_get_enable_rubberband (GTK_LIST_BASE (self)))
return;
gtk_list_base_set_enable_rubberband (GTK_LIST_BASE (self), enable_rubberband);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_ENABLE_RUBBERBAND]);
}
/**
* gtk_grid_view_get_enable_rubberband:
* @self: a #GtkGridView
*
* Returns whether rows can be selected by dragging with the mouse.
*
* Returns: %TRUE if rubberband selection is enabled
*/
gboolean
gtk_grid_view_get_enable_rubberband (GtkGridView *self)
{
g_return_val_if_fail (GTK_IS_GRID_VIEW (self), FALSE);
return gtk_list_base_get_enable_rubberband (GTK_LIST_BASE (self));
}
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