forked from AuroraMiddleware/gtk
gridview: Actually do something
Implement measuring and allocating items - which makes the items appear when drawing and allows interacting with the items. However, the gridview still does not allow any user interaction (including scrolling).
This commit is contained in:
Benjamin Otte
Matthias Clasen
parent
443e44853a
commit
ea93e18081
@ -28,7 +28,18 @@
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#include "gtkorientableprivate.h"
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#include "gtkprivate.h"
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#include "gtkscrollable.h"
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#include "gtksingleselection.h"
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#include "gtktypebuiltins.h"
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#include "gtkwidgetprivate.h"
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/* Maximum number of list items created by the gridview.
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* For debugging, you can set this to G_MAXUINT to ensure
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* there's always a list item for every row.
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*
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* We multiply this number with GtkGridView:max-columns so
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* that we can always display at least this many rows.
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*/
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#define GTK_GRID_VIEW_MIN_VISIBLE_ROWS (30)
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#define DEFAULT_MAX_COLUMNS (7)
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@ -55,22 +66,24 @@ struct _GtkGridView
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GtkOrientation orientation;
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guint min_columns;
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guint max_columns;
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/* set in size_allocate */
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guint n_columns;
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double column_width;
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GtkListItemTracker *anchor;
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double anchor_align;
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};
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struct _Cell
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{
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GtkListItemManagerItem parent;
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guint size_first_row; /* total */
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guint size; /* total */
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guint size_last_row; /* total */
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guint size; /* total, only counting cells in first column */
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};
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struct _CellAugment
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{
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GtkListItemManagerItemAugment parent;
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guint size_first_row; /* total */
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guint size; /* total */
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guint size_last_row; /* total */
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guint size; /* total, only counting first column */
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};
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enum
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@ -95,6 +108,50 @@ G_DEFINE_TYPE_WITH_CODE (GtkGridView, gtk_grid_view, GTK_TYPE_WIDGET,
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static GParamSpec *properties[N_PROPS] = { NULL, };
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static void G_GNUC_UNUSED
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dump (GtkGridView *self)
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{
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Cell *cell;
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guint n_widgets, n_list_rows, n_items;
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n_widgets = 0;
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n_list_rows = 0;
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n_items = 0;
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//g_print ("ANCHOR: %u - %u\n", self->anchor_start, self->anchor_end);
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for (cell = gtk_list_item_manager_get_first (self->item_manager);
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cell;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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if (cell->parent.widget)
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n_widgets++;
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n_list_rows++;
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n_items += cell->parent.n_items;
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g_print ("%6u%6u %5ux%3u %s (%upx)\n",
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cell->parent.n_items, n_items,
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n_items / (self->n_columns ? self->n_columns : self->min_columns),
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n_items % (self->n_columns ? self->n_columns : self->min_columns),
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cell->parent.widget ? " (widget)" : "", cell->size);
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}
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g_print (" => %u widgets in %u list rows\n", n_widgets, n_list_rows);
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}
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static void
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gtk_grid_view_set_anchor (GtkGridView *self,
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guint position,
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double align)
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{
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gtk_list_item_tracker_set_position (self->item_manager,
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self->anchor,
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0,
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(GTK_GRID_VIEW_MIN_VISIBLE_ROWS * align + 1) * self->max_columns,
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(GTK_GRID_VIEW_MIN_VISIBLE_ROWS * (1 - align) + 1) * self->max_columns);
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if (self->anchor_align != align)
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{
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self->anchor_align = align;
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gtk_widget_queue_allocate (GTK_WIDGET (self));
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}
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}
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static void
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gtk_grid_view_adjustment_value_changed_cb (GtkAdjustment *adjustment,
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GtkGridView *self)
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@ -102,10 +159,186 @@ gtk_grid_view_adjustment_value_changed_cb (GtkAdjustment *adjustment,
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gtk_widget_queue_allocate (GTK_WIDGET (self));
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}
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static gboolean
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gtk_grid_view_is_empty (GtkGridView *self)
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static void
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gtk_grid_view_update_adjustments (GtkGridView *self,
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GtkOrientation orientation)
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{
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return self->model == NULL;
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g_signal_handlers_block_by_func (self->adjustment[orientation],
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gtk_grid_view_adjustment_value_changed_cb,
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self);
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gtk_adjustment_configure (self->adjustment[orientation],
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0,
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0,
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0,
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0,
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0,
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0);
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g_signal_handlers_unblock_by_func (self->adjustment[orientation],
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gtk_grid_view_adjustment_value_changed_cb,
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self);
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}
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static int
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compare_ints (gconstpointer first,
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gconstpointer second)
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{
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return *(int *) first - *(int *) second;
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}
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static int
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gtk_grid_view_get_unknown_row_size (GtkGridView *self,
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GArray *heights)
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{
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g_return_val_if_fail (heights->len > 0, 0);
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/* return the median and hope rows are generally uniform with few outliers */
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g_array_sort (heights, compare_ints);
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return g_array_index (heights, int, heights->len / 2);
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}
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static void
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gtk_grid_view_measure_column_size (GtkGridView *self,
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int *minimum,
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int *natural)
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{
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GtkOrientation opposite;
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Cell *cell;
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int min, nat, child_min, child_nat;
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min = 0;
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nat = 0;
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opposite = OPPOSITE_ORIENTATION (self->orientation);
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for (cell = gtk_list_item_manager_get_first (self->item_manager);
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cell != NULL;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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/* ignore unavailable cells */
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if (cell->parent.widget == NULL)
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continue;
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gtk_widget_measure (cell->parent.widget,
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opposite, -1,
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&child_min, &child_nat, NULL, NULL);
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min = MAX (min, child_min);
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nat = MAX (nat, child_nat);
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}
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*minimum = min;
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*natural = nat;
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}
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static void
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gtk_grid_view_measure_across (GtkWidget *widget,
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int for_size,
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int *minimum,
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int *natural)
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{
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GtkGridView *self = GTK_GRID_VIEW (widget);
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gtk_grid_view_measure_column_size (self, minimum, natural);
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*minimum *= self->min_columns;
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*natural *= self->max_columns;
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}
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static guint
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gtk_grid_view_compute_n_columns (GtkGridView *self,
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guint for_size,
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int min,
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int nat)
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{
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guint n_columns;
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/* rounding down is exactly what we want here, so int division works */
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if (self->scroll_policy[OPPOSITE_ORIENTATION (self->orientation)] == GTK_SCROLL_MINIMUM)
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n_columns = for_size / MAX (1, min);
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else
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n_columns = for_size / MAX (1, nat);
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n_columns = CLAMP (n_columns, self->min_columns, self->max_columns);
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return n_columns;
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}
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static void
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gtk_grid_view_measure_list (GtkWidget *widget,
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int for_size,
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int *minimum,
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int *natural)
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{
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GtkGridView *self = GTK_GRID_VIEW (widget);
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Cell *cell;
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int height, row_height, child_min, child_nat, column_size, col_min, col_nat;
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gboolean measured;
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GArray *heights;
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guint n_unknown, n_columns;
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guint i;
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heights = g_array_new (FALSE, FALSE, sizeof (int));
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n_unknown = 0;
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height = 0;
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gtk_grid_view_measure_column_size (self, &col_min, &col_nat);
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for_size = MAX (for_size, col_min * (int) self->min_columns);
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n_columns = gtk_grid_view_compute_n_columns (self, for_size, col_min, col_nat);
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column_size = for_size / n_columns;
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i = 0;
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row_height = 0;
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measured = FALSE;
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for (cell = gtk_list_item_manager_get_first (self->item_manager);
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cell != NULL;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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if (cell->parent.widget)
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{
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gtk_widget_measure (cell->parent.widget,
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self->orientation, column_size,
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&child_min, &child_nat, NULL, NULL);
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if (self->scroll_policy[self->orientation] == GTK_SCROLL_MINIMUM)
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row_height = MAX (row_height, child_min);
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else
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row_height = MAX (row_height, child_nat);
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measured = TRUE;
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}
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i += cell->parent.n_items;
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if (i >= n_columns)
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{
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if (measured)
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{
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g_array_append_val (heights, row_height);
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i -= n_columns;
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height += row_height;
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measured = FALSE;
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row_height = 0;
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}
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n_unknown += i / n_columns;
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i %= n_columns;
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}
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}
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if (i > 0)
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{
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if (measured)
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{
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g_array_append_val (heights, row_height);
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height += row_height;
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}
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else
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n_unknown++;
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}
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if (n_unknown)
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height += n_unknown * gtk_grid_view_get_unknown_row_size (self, heights);
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g_array_free (heights, TRUE);
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*minimum = height;
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*natural = height;
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}
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static void
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@ -119,16 +352,58 @@ gtk_grid_view_measure (GtkWidget *widget,
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{
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GtkGridView *self = GTK_GRID_VIEW (widget);
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if (gtk_grid_view_is_empty (self))
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{
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*minimum = 0;
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*natural = 0;
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return;
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if (orientation == self->orientation)
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gtk_grid_view_measure_list (widget, for_size, minimum, natural);
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else
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gtk_grid_view_measure_across (widget, for_size, minimum, natural);
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}
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*minimum = 0;
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*natural = 0;
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static void
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cell_set_size (Cell *cell,
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guint size)
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{
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if (cell->size == size)
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return;
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cell->size = size;
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gtk_rb_tree_node_mark_dirty (cell);
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}
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static void
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gtk_grid_view_size_allocate_child (GtkGridView *self,
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GtkWidget *child,
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int x,
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int y,
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int width,
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int height)
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{
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GtkAllocation child_allocation;
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if (self->orientation == GTK_ORIENTATION_VERTICAL)
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{
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child_allocation.x = x;
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child_allocation.y = y;
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child_allocation.width = width;
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child_allocation.height = height;
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}
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else if (_gtk_widget_get_direction (GTK_WIDGET (self)) == GTK_TEXT_DIR_LTR)
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{
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child_allocation.x = y;
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child_allocation.y = x;
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child_allocation.width = height;
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child_allocation.height = width;
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}
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else
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{
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int mirror_point = gtk_widget_get_width (GTK_WIDGET (self));
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child_allocation.x = mirror_point - y - height;
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child_allocation.y = x;
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child_allocation.width = height;
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child_allocation.height = width;
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}
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gtk_widget_size_allocate (child, &child_allocation, -1);
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}
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static void
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@ -137,26 +412,155 @@ gtk_grid_view_size_allocate (GtkWidget *widget,
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int height,
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int baseline)
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{
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//GtkGridView *self = GTK_GRID_VIEW (widget);
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}
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GtkGridView *self = GTK_GRID_VIEW (widget);
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Cell *cell, *start;
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GArray *heights;
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int unknown_height, row_height, col_min, col_nat;
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GtkOrientation opposite_orientation;
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gboolean known;
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int x, y;
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guint i;
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static void
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gtk_grid_view_model_items_changed_cb (GListModel *model,
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guint position,
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guint removed,
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guint added,
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GtkGridView *self)
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{
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}
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opposite_orientation = OPPOSITE_ORIENTATION (self->orientation);
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static void
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gtk_grid_view_clear_model (GtkGridView *self)
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{
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if (self->model == NULL)
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/* step 0: exit early if list is empty */
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if (gtk_list_item_manager_get_root (self->item_manager) == NULL)
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return;
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g_signal_handlers_disconnect_by_func (self->model, gtk_grid_view_model_items_changed_cb, self);
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g_clear_object (&self->model);
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/* step 1: determine width of the list */
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gtk_grid_view_measure_column_size (self, &col_min, &col_nat);
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self->n_columns = gtk_grid_view_compute_n_columns (self,
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self->orientation == GTK_ORIENTATION_VERTICAL ? width : height,
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col_min, col_nat);
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self->column_width = (self->orientation == GTK_ORIENTATION_VERTICAL ? width : height) / self->n_columns;
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self->column_width = MAX (self->column_width, col_min);
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/* step 2: determine height of known rows */
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heights = g_array_new (FALSE, FALSE, sizeof (int));
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i = 0;
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row_height = 0;
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start = NULL;
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for (cell = gtk_list_item_manager_get_first (self->item_manager);
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cell != NULL;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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if (i == 0)
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start = cell;
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if (cell->parent.widget)
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{
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int min, nat, size;
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gtk_widget_measure (cell->parent.widget, self->orientation,
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self->column_width,
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&min, &nat, NULL, NULL);
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if (self->scroll_policy[self->orientation] == GTK_SCROLL_MINIMUM)
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size = min;
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else
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size = nat;
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g_array_append_val (heights, size);
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row_height = MAX (row_height, size);
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}
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cell_set_size (cell, 0);
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i += cell->parent.n_items;
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if (i >= self->n_columns)
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{
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i %= self->n_columns;
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cell_set_size (start, start->size + row_height);
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start = cell;
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row_height = 0;
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}
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}
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if (i > 0)
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cell_set_size (start, start->size + row_height);
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/* step 3: determine height of rows with only unknown items */
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unknown_height = gtk_grid_view_get_unknown_row_size (self, heights);
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g_array_free (heights, TRUE);
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i = 0;
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known = FALSE;
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for (start = cell = gtk_list_item_manager_get_first (self->item_manager);
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cell != NULL;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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if (i == 0)
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start = cell;
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if (cell->parent.widget)
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known = TRUE;
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i += cell->parent.n_items;
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if (i >= self->n_columns)
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{
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if (!known)
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cell_set_size (start, start->size + unknown_height);
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i -= self->n_columns;
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known = FALSE;
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if (i >= self->n_columns)
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{
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cell_set_size (cell, cell->size + unknown_height * (i / self->n_columns));
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i %= self->n_columns;
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}
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start = cell;
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}
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}
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if (i > 0 && !known)
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cell_set_size (start, start->size + unknown_height);
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/* step 4: update the adjustments */
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gtk_grid_view_update_adjustments (self, GTK_ORIENTATION_HORIZONTAL);
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gtk_grid_view_update_adjustments (self, GTK_ORIENTATION_VERTICAL);
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/* step 5: actually allocate the widgets */
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x = - round (gtk_adjustment_get_value (self->adjustment[opposite_orientation]));
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y = - round (gtk_adjustment_get_value (self->adjustment[self->orientation]));
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i = 0;
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row_height = 0;
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for (cell = gtk_list_item_manager_get_first (self->item_manager);
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cell != NULL;
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cell = gtk_rb_tree_node_get_next (cell))
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{
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if (cell->parent.widget)
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{
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if (i == 0)
|
||||
{
|
||||
y += row_height;
|
||||
row_height = cell->size;
|
||||
}
|
||||
gtk_grid_view_size_allocate_child (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 = (i + 1) % self->n_columns;
|
||||
}
|
||||
else
|
||||
{
|
||||
i += cell->parent.n_items;
|
||||
if (i > self->n_columns)
|
||||
{
|
||||
i -= self->n_columns;
|
||||
y += row_height;
|
||||
row_height = cell->size;
|
||||
|
||||
if (i > self->n_columns)
|
||||
{
|
||||
guint unknown_rows = (i - 1) / self->n_columns;
|
||||
int unknown_height2 = unknown_rows * unknown_height;
|
||||
row_height -= unknown_height2;
|
||||
y += unknown_height2;
|
||||
i %= self->n_columns;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
@ -177,11 +581,16 @@ gtk_grid_view_dispose (GObject *object)
|
||||
{
|
||||
GtkGridView *self = GTK_GRID_VIEW (object);
|
||||
|
||||
gtk_grid_view_clear_model (self);
|
||||
g_clear_object (&self->model);
|
||||
|
||||
gtk_grid_view_clear_adjustment (self, GTK_ORIENTATION_HORIZONTAL);
|
||||
gtk_grid_view_clear_adjustment (self, GTK_ORIENTATION_VERTICAL);
|
||||
|
||||
if (self->anchor)
|
||||
{
|
||||
gtk_list_item_tracker_free (self->item_manager, self->anchor);
|
||||
self->anchor = NULL;
|
||||
}
|
||||
g_clear_object (&self->item_manager);
|
||||
|
||||
G_OBJECT_CLASS (gtk_grid_view_parent_class)->dispose (object);
|
||||
@ -449,34 +858,33 @@ cell_augment (GtkRbTree *tree,
|
||||
gpointer left,
|
||||
gpointer right)
|
||||
{
|
||||
#if 0
|
||||
Cell *cell = node;
|
||||
CellAugment *aug = node_augment;
|
||||
|
||||
gtk_list_item_manager_augment_node (tree, node_augment, node, left, right);
|
||||
|
||||
aug->height = row->height * row->parent.n_items;
|
||||
aug->size = cell->size;
|
||||
|
||||
if (left)
|
||||
{
|
||||
ListRowAugment *left_aug = gtk_rb_tree_get_augment (tree, left);
|
||||
CellAugment *left_aug = gtk_rb_tree_get_augment (tree, left);
|
||||
|
||||
aug->height += left_aug->height;
|
||||
aug->size += left_aug->size;
|
||||
}
|
||||
|
||||
if (right)
|
||||
{
|
||||
ListRowAugment *right_aug = gtk_rb_tree_get_augment (tree, right);
|
||||
CellAugment *right_aug = gtk_rb_tree_get_augment (tree, right);
|
||||
|
||||
aug->height += right_aug->height;
|
||||
aug->size += right_aug->size;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static void
|
||||
gtk_grid_view_init (GtkGridView *self)
|
||||
{
|
||||
self->item_manager = gtk_list_item_manager_new (GTK_WIDGET (self), "flowboxchild", Cell, CellAugment, cell_augment);
|
||||
self->anchor = gtk_list_item_tracker_new (self->item_manager);
|
||||
|
||||
self->min_columns = 1;
|
||||
self->max_columns = DEFAULT_MAX_COLUMNS;
|
||||
@ -573,16 +981,27 @@ gtk_grid_view_set_model (GtkGridView *self,
|
||||
if (self->model == model)
|
||||
return;
|
||||
|
||||
gtk_grid_view_clear_model (self);
|
||||
g_clear_object (&self->model);
|
||||
|
||||
if (model)
|
||||
{
|
||||
GtkSelectionModel *selection_model;
|
||||
|
||||
self->model = g_object_ref (model);
|
||||
|
||||
g_signal_connect (model,
|
||||
"items-changed",
|
||||
G_CALLBACK (gtk_grid_view_model_items_changed_cb),
|
||||
self);
|
||||
if (GTK_IS_SELECTION_MODEL (model))
|
||||
selection_model = GTK_SELECTION_MODEL (g_object_ref (model));
|
||||
else
|
||||
selection_model = GTK_SELECTION_MODEL (gtk_single_selection_new (model));
|
||||
|
||||
gtk_list_item_manager_set_model (self->item_manager, selection_model);
|
||||
gtk_grid_view_set_anchor (self, 0, 0.0);
|
||||
|
||||
g_object_unref (selection_model);
|
||||
}
|
||||
else
|
||||
{
|
||||
gtk_list_item_manager_set_model (self->item_manager, NULL);
|
||||
}
|
||||
|
||||
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
|
||||
@ -664,6 +1083,10 @@ gtk_grid_view_set_max_columns (GtkGridView *self,
|
||||
|
||||
self->max_columns = max_columns;
|
||||
|
||||
gtk_grid_view_set_anchor (self,
|
||||
gtk_list_item_tracker_get_position (self->item_manager, self->anchor),
|
||||
self->anchor_align);
|
||||
|
||||
gtk_widget_queue_resize (GTK_WIDGET (self));
|
||||
|
||||
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MAX_COLUMNS]);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user