/* gtkcellareabox.c * * Copyright (C) 2010 Openismus GmbH * * Authors: * Tristan Van Berkom * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library. If not, see . */ /** * GtkCellAreaBox: * * A cell area that renders GtkCellRenderers into a row or a column * * The #GtkCellAreaBox renders cell renderers into a row or a column * depending on its #GtkOrientation. * * GtkCellAreaBox uses a notion of packing. Packing * refers to adding cell renderers with reference to a particular position * in a #GtkCellAreaBox. There are two reference positions: the * start and the end of the box. * When the #GtkCellAreaBox is oriented in the %GTK_ORIENTATION_VERTICAL * orientation, the start is defined as the top of the box and the end is * defined as the bottom. In the %GTK_ORIENTATION_HORIZONTAL orientation * start is defined as the left side and the end is defined as the right * side. * * Alignments of #GtkCellRenderers rendered in adjacent rows can be * configured by configuring the #GtkCellAreaBox align child cell property * with gtk_cell_area_cell_set_property() or by specifying the "align" * argument to gtk_cell_area_box_pack_start() and gtk_cell_area_box_pack_end(). */ #include "config.h" #include "gtkintl.h" #include "gtkorientable.h" #include "gtkcelllayout.h" #include "gtkcellareabox.h" #include "gtkcellareaboxcontextprivate.h" #include "gtktypebuiltins.h" #include "gtkprivate.h" /* GObjectClass */ static void gtk_cell_area_box_finalize (GObject *object); static void gtk_cell_area_box_dispose (GObject *object); static void gtk_cell_area_box_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_cell_area_box_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); /* GtkCellAreaClass */ static void gtk_cell_area_box_add (GtkCellArea *area, GtkCellRenderer *renderer); static void gtk_cell_area_box_remove (GtkCellArea *area, GtkCellRenderer *renderer); static void gtk_cell_area_box_foreach (GtkCellArea *area, GtkCellCallback callback, gpointer callback_data); static void gtk_cell_area_box_foreach_alloc (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, const GdkRectangle *cell_area, const GdkRectangle *background_area, GtkCellAllocCallback callback, gpointer callback_data); static void gtk_cell_area_box_apply_attributes (GtkCellArea *area, GtkTreeModel *tree_model, GtkTreeIter *iter, gboolean is_expander, gboolean is_expanded); static void gtk_cell_area_box_set_cell_property (GtkCellArea *area, GtkCellRenderer *renderer, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_cell_area_box_get_cell_property (GtkCellArea *area, GtkCellRenderer *renderer, guint prop_id, GValue *value, GParamSpec *pspec); static GtkCellAreaContext *gtk_cell_area_box_create_context (GtkCellArea *area); static GtkCellAreaContext *gtk_cell_area_box_copy_context (GtkCellArea *area, GtkCellAreaContext *context); static GtkSizeRequestMode gtk_cell_area_box_get_request_mode (GtkCellArea *area); static void gtk_cell_area_box_get_preferred_width (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int *minimum_width, int *natural_width); static void gtk_cell_area_box_get_preferred_height (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int *minimum_height, int *natural_height); static void gtk_cell_area_box_get_preferred_height_for_width (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int width, int *minimum_height, int *natural_height); static void gtk_cell_area_box_get_preferred_width_for_height (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int height, int *minimum_width, int *natural_width); static gboolean gtk_cell_area_box_focus (GtkCellArea *area, GtkDirectionType direction); /* GtkCellLayoutIface */ static void gtk_cell_area_box_cell_layout_init (GtkCellLayoutIface *iface); static void gtk_cell_area_box_layout_pack_start (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, gboolean expand); static void gtk_cell_area_box_layout_pack_end (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, gboolean expand); static void gtk_cell_area_box_layout_reorder (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, int position); static void gtk_cell_area_box_focus_changed (GtkCellArea *area, GParamSpec *pspec, GtkCellAreaBox *box); /* CellInfo/CellGroup metadata handling and convenience functions */ typedef struct { GtkCellRenderer *renderer; guint expand : 1; /* Whether the cell expands */ guint pack : 1; /* Whether it is packed from the start or end */ guint align : 1; /* Whether to align its position with adjacent rows */ guint fixed : 1; /* Whether to require the same size for all rows */ } CellInfo; typedef struct { GList *cells; guint id : 8; guint n_cells : 8; guint expand_cells : 8; guint align : 1; guint visible : 1; } CellGroup; typedef struct { GtkCellRenderer *renderer; int position; int size; } AllocatedCell; static CellInfo *cell_info_new (GtkCellRenderer *renderer, GtkPackType pack, gboolean expand, gboolean align, gboolean fixed); static void cell_info_free (CellInfo *info); static int cell_info_find (CellInfo *info, GtkCellRenderer *renderer); static AllocatedCell *allocated_cell_new (GtkCellRenderer *renderer, int position, int size); static void allocated_cell_free (AllocatedCell *cell); static GList *list_consecutive_cells (GtkCellAreaBox *box); static int count_expand_groups (GtkCellAreaBox *box); static void context_weak_notify (GtkCellAreaBox *box, GtkCellAreaBoxContext *dead_context); static void reset_contexts (GtkCellAreaBox *box); static void init_context_groups (GtkCellAreaBox *box); static void init_context_group (GtkCellAreaBox *box, GtkCellAreaBoxContext *context); static GSList *get_allocated_cells (GtkCellAreaBox *box, GtkCellAreaBoxContext *context, GtkWidget *widget, int width, int height); typedef struct _GtkCellAreaBoxClass GtkCellAreaBoxClass; typedef struct _GtkCellAreaBoxPrivate GtkCellAreaBoxPrivate; struct _GtkCellAreaBox { GtkCellArea parent_instance; }; struct _GtkCellAreaBoxClass { GtkCellAreaClass parent_class; }; struct _GtkCellAreaBoxPrivate { /* We hold on to the previously focused cell when navigating * up and down in a horizontal box (or left and right on a vertical one) * this way we always re-enter the last focused cell. */ GtkCellRenderer *last_focus_cell; gulong focus_cell_id; GList *cells; GArray *groups; GSList *contexts; GtkOrientation orientation; int spacing; /* We hold on to the rtl state from a widget we are requested for * so that we can navigate focus correctly */ gboolean rtl; }; enum { PROP_0, PROP_ORIENTATION, PROP_SPACING }; enum { CELL_PROP_0, CELL_PROP_EXPAND, CELL_PROP_ALIGN, CELL_PROP_FIXED_SIZE, CELL_PROP_PACK_TYPE }; G_DEFINE_TYPE_WITH_CODE (GtkCellAreaBox, gtk_cell_area_box, GTK_TYPE_CELL_AREA, G_ADD_PRIVATE (GtkCellAreaBox) G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT, gtk_cell_area_box_cell_layout_init) G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL)) static void gtk_cell_area_box_init (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); priv->orientation = GTK_ORIENTATION_HORIZONTAL; priv->groups = g_array_new (FALSE, TRUE, sizeof (CellGroup)); priv->cells = NULL; priv->contexts = NULL; priv->spacing = 0; priv->rtl = FALSE; /* Watch whenever focus is given to a cell, even if it's not with keynav, * this way we remember upon entry of the area where focus was last time * around */ priv->focus_cell_id = g_signal_connect (box, "notify::focus-cell", G_CALLBACK (gtk_cell_area_box_focus_changed), box); } static void gtk_cell_area_box_class_init (GtkCellAreaBoxClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); GtkCellAreaClass *area_class = GTK_CELL_AREA_CLASS (class); /* GObjectClass */ object_class->finalize = gtk_cell_area_box_finalize; object_class->dispose = gtk_cell_area_box_dispose; object_class->set_property = gtk_cell_area_box_set_property; object_class->get_property = gtk_cell_area_box_get_property; /* GtkCellAreaClass */ area_class->add = gtk_cell_area_box_add; area_class->remove = gtk_cell_area_box_remove; area_class->foreach = gtk_cell_area_box_foreach; area_class->foreach_alloc = gtk_cell_area_box_foreach_alloc; area_class->apply_attributes = gtk_cell_area_box_apply_attributes; area_class->set_cell_property = gtk_cell_area_box_set_cell_property; area_class->get_cell_property = gtk_cell_area_box_get_cell_property; area_class->create_context = gtk_cell_area_box_create_context; area_class->copy_context = gtk_cell_area_box_copy_context; area_class->get_request_mode = gtk_cell_area_box_get_request_mode; area_class->get_preferred_width = gtk_cell_area_box_get_preferred_width; area_class->get_preferred_height = gtk_cell_area_box_get_preferred_height; area_class->get_preferred_height_for_width = gtk_cell_area_box_get_preferred_height_for_width; area_class->get_preferred_width_for_height = gtk_cell_area_box_get_preferred_width_for_height; area_class->focus = gtk_cell_area_box_focus; /* Properties */ g_object_class_override_property (object_class, PROP_ORIENTATION, "orientation"); /** * GtkCellAreaBox:spacing: * * The amount of space to reserve between cells. */ g_object_class_install_property (object_class, PROP_SPACING, g_param_spec_int ("spacing", P_("Spacing"), P_("Space which is inserted between cells"), 0, G_MAXINT, 0, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY)); /* Cell Properties */ /** * GtkCellAreaBox:expand: * * Whether the cell renderer should receive extra space * when the area receives more than its natural size. */ gtk_cell_area_class_install_cell_property (area_class, CELL_PROP_EXPAND, g_param_spec_boolean ("expand", P_("Expand"), P_("Whether the cell expands"), FALSE, GTK_PARAM_READWRITE)); /** * GtkCellAreaBox:align: * * Whether the cell renderer should be aligned in adjacent rows. */ gtk_cell_area_class_install_cell_property (area_class, CELL_PROP_ALIGN, g_param_spec_boolean ("align", P_("Align"), P_("Whether cell should align with adjacent rows"), FALSE, GTK_PARAM_READWRITE)); /** * GtkCellAreaBox:fixed-size: * * Whether the cell renderer should require the same size * for all rows for which it was requested. */ gtk_cell_area_class_install_cell_property (area_class, CELL_PROP_FIXED_SIZE, g_param_spec_boolean ("fixed-size", P_("Fixed Size"), P_("Whether cells should be the same size in all rows"), TRUE, GTK_PARAM_READWRITE)); /** * GtkCellAreaBox:pack-type: * * A GtkPackType indicating whether the cell renderer is packed * with reference to the start or end of the area. */ gtk_cell_area_class_install_cell_property (area_class, CELL_PROP_PACK_TYPE, g_param_spec_enum ("pack-type", P_("Pack Type"), P_("A GtkPackType indicating whether the cell is packed with " "reference to the start or end of the cell area"), GTK_TYPE_PACK_TYPE, GTK_PACK_START, GTK_PARAM_READWRITE)); } /************************************************************* * CellInfo/CellGroup basics and convenience functions * *************************************************************/ static CellInfo * cell_info_new (GtkCellRenderer *renderer, GtkPackType pack, gboolean expand, gboolean align, gboolean fixed) { CellInfo *info = g_slice_new (CellInfo); info->renderer = g_object_ref_sink (renderer); info->pack = pack; info->expand = expand; info->align = align; info->fixed = fixed; return info; } static void cell_info_free (CellInfo *info) { g_object_unref (info->renderer); g_slice_free (CellInfo, info); } static int cell_info_find (CellInfo *info, GtkCellRenderer *renderer) { return (info->renderer == renderer) ? 0 : -1; } static AllocatedCell * allocated_cell_new (GtkCellRenderer *renderer, int position, int size) { AllocatedCell *cell = g_slice_new (AllocatedCell); cell->renderer = renderer; cell->position = position; cell->size = size; return cell; } static void allocated_cell_free (AllocatedCell *cell) { g_slice_free (AllocatedCell, cell); } static GList * list_consecutive_cells (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *l, *consecutive_cells = NULL, *pack_end_cells = NULL; CellInfo *info; /* List cells in consecutive order taking their * PACK_START/PACK_END options into account */ for (l = priv->cells; l; l = l->next) { info = l->data; if (info->pack == GTK_PACK_START) consecutive_cells = g_list_prepend (consecutive_cells, info); } for (l = priv->cells; l; l = l->next) { info = l->data; if (info->pack == GTK_PACK_END) pack_end_cells = g_list_prepend (pack_end_cells, info); } consecutive_cells = g_list_reverse (consecutive_cells); consecutive_cells = g_list_concat (consecutive_cells, pack_end_cells); return consecutive_cells; } static void cell_groups_clear (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); int i; for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); g_list_free (group->cells); } g_array_set_size (priv->groups, 0); } static void cell_groups_rebuild (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); CellGroup group = { 0, }; CellGroup *group_ptr; GList *cells, *l; guint id = 0; gboolean last_cell_fixed = FALSE; cell_groups_clear (box); if (!priv->cells) return; cells = list_consecutive_cells (box); /* First group is implied */ g_array_append_val (priv->groups, group); group_ptr = &g_array_index (priv->groups, CellGroup, id); for (l = cells; l; l = l->next) { CellInfo *info = l->data; /* A new group starts with any aligned cell, or * at the beginning and end of a fixed size cell. * the first group is implied */ if ((info->align || info->fixed || last_cell_fixed) && l != cells) { memset (&group, 0x0, sizeof (CellGroup)); group.id = ++id; g_array_append_val (priv->groups, group); group_ptr = &g_array_index (priv->groups, CellGroup, id); } group_ptr->cells = g_list_prepend (group_ptr->cells, info); group_ptr->n_cells++; /* Not every group is aligned, some are floating * fixed size cells */ if (info->align) group_ptr->align = TRUE; /* A group expands if it contains any expand cells */ if (info->expand) group_ptr->expand_cells++; last_cell_fixed = info->fixed; } g_list_free (cells); for (id = 0; id < priv->groups->len; id++) { group_ptr = &g_array_index (priv->groups, CellGroup, id); group_ptr->cells = g_list_reverse (group_ptr->cells); } /* Contexts need to be updated with the new grouping information */ init_context_groups (box); } static int count_visible_cells (CellGroup *group, int *expand_cells) { GList *l; int visible_cells = 0; int n_expand_cells = 0; for (l = group->cells; l; l = l->next) { CellInfo *info = l->data; if (gtk_cell_renderer_get_visible (info->renderer)) { visible_cells++; if (info->expand) n_expand_cells++; } } if (expand_cells) *expand_cells = n_expand_cells; return visible_cells; } static int count_expand_groups (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); int i; int expand_groups = 0; for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); if (group->expand_cells > 0) expand_groups++; } return expand_groups; } static void context_weak_notify (GtkCellAreaBox *box, GtkCellAreaBoxContext *dead_context) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); priv->contexts = g_slist_remove (priv->contexts, dead_context); } static void init_context_group (GtkCellAreaBox *box, GtkCellAreaBoxContext *context) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); int *expand_groups, *align_groups, i; expand_groups = g_new (gboolean, priv->groups->len); align_groups = g_new (gboolean, priv->groups->len); for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); expand_groups[i] = (group->expand_cells > 0); align_groups[i] = group->align; } /* This call implies resetting the request info */ _gtk_cell_area_box_init_groups (context, priv->groups->len, expand_groups, align_groups); g_free (expand_groups); g_free (align_groups); } static void init_context_groups (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GSList *l; /* When the box's groups are reconstructed, * contexts need to be reinitialized. */ for (l = priv->contexts; l; l = l->next) { GtkCellAreaBoxContext *context = l->data; init_context_group (box, context); } } static void reset_contexts (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GSList *l; /* When the box layout changes, contexts need to * be reset and sizes for the box get requested again */ for (l = priv->contexts; l; l = l->next) { GtkCellAreaContext *context = l->data; gtk_cell_area_context_reset (context); } } /* Fall back on a completely unaligned dynamic allocation of cells * when not allocated for the said orientation, alignment of cells * is not done when each area gets a different size in the orientation * of the box. */ static GSList * allocate_cells_manually (GtkCellAreaBox *box, GtkWidget *widget, int width, int height) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *cells, *l; GSList *allocated_cells = NULL; GtkRequestedSize *sizes; int i; int nvisible = 0, nexpand = 0, group_expand; int avail_size, extra_size, extra_extra, full_size; int position = 0, for_size; gboolean rtl; if (!priv->cells) return NULL; /* For vertical oriented boxes, we just let the cell renderers * realign themselves for rtl */ rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL); cells = list_consecutive_cells (box); /* Count the visible and expand cells */ for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); nvisible += count_visible_cells (group, &group_expand); nexpand += group_expand; } if (nvisible <= 0) { g_list_free (cells); return NULL; } if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { full_size = avail_size = width; for_size = height; } else { full_size = avail_size = height; for_size = width; } /* Go ahead and collect the requests on the fly */ sizes = g_new0 (GtkRequestedSize, nvisible); for (l = cells, i = 0; l; l = l->next) { CellInfo *info = l->data; if (!gtk_cell_renderer_get_visible (info->renderer)) continue; gtk_cell_area_request_renderer (GTK_CELL_AREA (box), info->renderer, priv->orientation, widget, for_size, &sizes[i].minimum_size, &sizes[i].natural_size); avail_size -= sizes[i].minimum_size; sizes[i].data = info; i++; } /* Naturally distribute the allocation */ avail_size -= (nvisible - 1) * priv->spacing; if (avail_size > 0) avail_size = gtk_distribute_natural_allocation (avail_size, nvisible, sizes); else avail_size = 0; /* Calculate/distribute expand for cells */ if (nexpand > 0) { extra_size = avail_size / nexpand; extra_extra = avail_size % nexpand; } else extra_size = extra_extra = 0; /* Create the allocated cells */ for (i = 0; i < nvisible; i++) { CellInfo *info = sizes[i].data; AllocatedCell *cell; if (info->expand) { sizes[i].minimum_size += extra_size; if (extra_extra) { sizes[i].minimum_size++; extra_extra--; } } if (rtl) cell = allocated_cell_new (info->renderer, full_size - (position + sizes[i].minimum_size), sizes[i].minimum_size); else cell = allocated_cell_new (info->renderer, position, sizes[i].minimum_size); allocated_cells = g_slist_prepend (allocated_cells, cell); position += sizes[i].minimum_size; position += priv->spacing; } g_free (sizes); g_list_free (cells); /* Note it might not be important to reverse the list here at all, * we have the correct positions, no need to allocate from left to right */ return g_slist_reverse (allocated_cells); } /* Returns an allocation for each cell in the orientation of the box, * used in ->render()/->event() implementations to get a straight-forward * list of allocated cells to operate on. */ static GSList * get_allocated_cells (GtkCellAreaBox *box, GtkCellAreaBoxContext *context, GtkWidget *widget, int width, int height) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaBoxAllocation *group_allocs; GtkCellArea *area = GTK_CELL_AREA (box); GList *cell_list; GSList *allocated_cells = NULL; int i, j, n_allocs, position; int for_size, full_size; gboolean rtl; group_allocs = _gtk_cell_area_box_context_get_orientation_allocs (context, &n_allocs); if (!group_allocs) return allocate_cells_manually (box, widget, width, height); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { full_size = width; for_size = height; } else { full_size = height; for_size = width; } /* For vertical oriented boxes, we just let the cell renderers * realign themselves for rtl */ rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL); for (position = 0, i = 0; i < n_allocs; i++) { /* We dont always allocate all groups, sometimes the requested * group has only invisible cells for every row, hence the usage * of group_allocs[i].group_idx here */ CellGroup *group = &g_array_index (priv->groups, CellGroup, group_allocs[i].group_idx); /* Exception for single cell groups */ if (group->n_cells == 1) { CellInfo *info = group->cells->data; AllocatedCell *cell; int cell_position, cell_size; if (!gtk_cell_renderer_get_visible (info->renderer)) continue; /* If were not aligned, place the cell after the last cell */ if (info->align) position = cell_position = group_allocs[i].position; else cell_position = position; /* If not a fixed size, use only the requested size for this row */ if (info->fixed) cell_size = group_allocs[i].size; else { int dummy; gtk_cell_area_request_renderer (area, info->renderer, priv->orientation, widget, for_size, &dummy, &cell_size); cell_size = MIN (cell_size, group_allocs[i].size); } if (rtl) cell = allocated_cell_new (info->renderer, full_size - (cell_position + cell_size), cell_size); else cell = allocated_cell_new (info->renderer, cell_position, cell_size); position += cell_size; position += priv->spacing; allocated_cells = g_slist_prepend (allocated_cells, cell); } else { GtkRequestedSize *sizes; int avail_size, cell_position; int visible_cells, expand_cells; int extra_size, extra_extra; visible_cells = count_visible_cells (group, &expand_cells); /* If this row has no visible cells in this group, just * skip the allocation */ if (visible_cells == 0) continue; /* If were not aligned, place the cell after the last cell * and eat up the extra space */ if (group->align) { avail_size = group_allocs[i].size; position = cell_position = group_allocs[i].position; } else { avail_size = group_allocs[i].size + (group_allocs[i].position - position); cell_position = position; } sizes = g_new (GtkRequestedSize, visible_cells); for (j = 0, cell_list = group->cells; cell_list; cell_list = cell_list->next) { CellInfo *info = cell_list->data; if (!gtk_cell_renderer_get_visible (info->renderer)) continue; gtk_cell_area_request_renderer (area, info->renderer, priv->orientation, widget, for_size, &sizes[j].minimum_size, &sizes[j].natural_size); sizes[j].data = info; avail_size -= sizes[j].minimum_size; j++; } /* Distribute cells naturally within the group */ avail_size -= (visible_cells - 1) * priv->spacing; if (avail_size > 0) avail_size = gtk_distribute_natural_allocation (avail_size, visible_cells, sizes); else avail_size = 0; /* Calculate/distribute expand for cells */ if (expand_cells > 0) { extra_size = avail_size / expand_cells; extra_extra = avail_size % expand_cells; } else extra_size = extra_extra = 0; /* Create the allocated cells (loop only over visible cells here) */ for (j = 0; j < visible_cells; j++) { CellInfo *info = sizes[j].data; AllocatedCell *cell; if (info->expand) { sizes[j].minimum_size += extra_size; if (extra_extra) { sizes[j].minimum_size++; extra_extra--; } } if (rtl) cell = allocated_cell_new (info->renderer, full_size - (cell_position + sizes[j].minimum_size), sizes[j].minimum_size); else cell = allocated_cell_new (info->renderer, cell_position, sizes[j].minimum_size); allocated_cells = g_slist_prepend (allocated_cells, cell); cell_position += sizes[j].minimum_size; cell_position += priv->spacing; } g_free (sizes); position = cell_position; } } g_free (group_allocs); /* Note it might not be important to reverse the list here at all, * we have the correct positions, no need to allocate from left to right */ return g_slist_reverse (allocated_cells); } static void gtk_cell_area_box_focus_changed (GtkCellArea *area, GParamSpec *pspec, GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); if (gtk_cell_area_get_focus_cell (area)) priv->last_focus_cell = gtk_cell_area_get_focus_cell (area); } /************************************************************* * GObjectClass * *************************************************************/ static void gtk_cell_area_box_finalize (GObject *object) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (object); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GSList *l; /* Unref/free the context list */ for (l = priv->contexts; l; l = l->next) g_object_weak_unref (G_OBJECT (l->data), (GWeakNotify)context_weak_notify, box); g_slist_free (priv->contexts); priv->contexts = NULL; /* Free the cell grouping info */ cell_groups_clear (box); g_array_free (priv->groups, TRUE); G_OBJECT_CLASS (gtk_cell_area_box_parent_class)->finalize (object); } static void gtk_cell_area_box_dispose (GObject *object) { G_OBJECT_CLASS (gtk_cell_area_box_parent_class)->dispose (object); } static void gtk_cell_area_box_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (object); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); switch (prop_id) { case PROP_ORIENTATION: if (priv->orientation != g_value_get_enum (value)) { priv->orientation = g_value_get_enum (value); /* Notify that size needs to be requested again */ reset_contexts (box); g_object_notify_by_pspec (object, pspec); } break; case PROP_SPACING: gtk_cell_area_box_set_spacing (box, g_value_get_int (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_cell_area_box_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (object); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); switch (prop_id) { case PROP_ORIENTATION: g_value_set_enum (value, priv->orientation); break; case PROP_SPACING: g_value_set_int (value, gtk_cell_area_box_get_spacing (box)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /************************************************************* * GtkCellAreaClass * *************************************************************/ static void gtk_cell_area_box_add (GtkCellArea *area, GtkCellRenderer *renderer) { gtk_cell_area_box_pack_start (GTK_CELL_AREA_BOX (area), renderer, FALSE, FALSE, TRUE); } static void gtk_cell_area_box_remove (GtkCellArea *area, GtkCellRenderer *renderer) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *node; if (priv->last_focus_cell == renderer) priv->last_focus_cell = NULL; node = g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find); if (node) { CellInfo *info = node->data; cell_info_free (info); priv->cells = g_list_delete_link (priv->cells, node); /* Reconstruct cell groups */ cell_groups_rebuild (box); } else g_warning ("Trying to remove a cell renderer that is not present GtkCellAreaBox"); } static void gtk_cell_area_box_foreach (GtkCellArea *area, GtkCellCallback callback, gpointer callback_data) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *list; for (list = priv->cells; list; list = list->next) { CellInfo *info = list->data; if (callback (info->renderer, callback_data)) break; } } static void gtk_cell_area_box_foreach_alloc (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, const GdkRectangle *cell_area, const GdkRectangle *background_area, GtkCellAllocCallback callback, gpointer callback_data) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaBoxContext *box_context = GTK_CELL_AREA_BOX_CONTEXT (context); GSList *allocated_cells, *l; GdkRectangle cell_alloc, cell_background; gboolean rtl; rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL); cell_alloc = *cell_area; /* Get a list of cells with allocation sizes decided regardless * of alignments and pack order etc. */ allocated_cells = get_allocated_cells (box, box_context, widget, cell_area->width, cell_area->height); for (l = allocated_cells; l; l = l->next) { AllocatedCell *cell = l->data; if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { cell_alloc.x = cell_area->x + cell->position; cell_alloc.width = cell->size; } else { cell_alloc.y = cell_area->y + cell->position; cell_alloc.height = cell->size; } /* Stop iterating over cells if they flow out of the render * area, this can happen because the render area can actually * be smaller than the requested area (treeview columns can * be user resizable and can be resized to be smaller than * the actual requested area). */ if (cell_alloc.x > cell_area->x + cell_area->width || cell_alloc.x + cell_alloc.width < cell_area->x || cell_alloc.y > cell_area->y + cell_area->height) break; /* Special case for the last cell (or first cell in rtl)... * let the last cell consume the remaining space in the area * (the last cell is allowed to consume the remaining space if * the space given for rendering is actually larger than allocation, * this can happen in the expander GtkTreeViewColumn where only the * deepest depth column receives the allocation... shallow columns * receive more width). */ if (!l->next) { if (rtl) { /* Fill the leading space for the first cell in the area * (still last in the list) */ cell_alloc.width = (cell_alloc.x - cell_area->x) + cell_alloc.width; cell_alloc.x = cell_area->x; } else { cell_alloc.width = cell_area->x + cell_area->width - cell_alloc.x; cell_alloc.height = cell_area->y + cell_area->height - cell_alloc.y; } } else { /* If the cell we are rendering doesn't fit into the remaining space, * clip it so that the underlying renderer has a chance to deal with * it (for instance text renderers get a chance to ellipsize). */ if (cell_alloc.x + cell_alloc.width > cell_area->x + cell_area->width) cell_alloc.width = cell_area->x + cell_area->width - cell_alloc.x; if (cell_alloc.y + cell_alloc.height > cell_area->y + cell_area->height) cell_alloc.height = cell_area->y + cell_area->height - cell_alloc.y; } /* Add portions of the background_area to the cell_alloc * to create the cell_background */ cell_background = cell_alloc; if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { if (l == allocated_cells) { /* Add the depth to the first cell */ if (rtl) { cell_background.width += background_area->width - cell_area->width; cell_background.x = background_area->x + background_area->width - cell_background.width; } else { cell_background.width += cell_area->x - background_area->x; cell_background.x = background_area->x; } } if (l->next == NULL) { /* Grant this cell the remaining space */ int remain = cell_background.x - background_area->x; if (rtl) cell_background.x -= remain; else cell_background.width = background_area->width - remain; } cell_background.y = background_area->y; cell_background.height = background_area->height; } else { if (l == allocated_cells) { cell_background.height += cell_background.y - background_area->y; cell_background.y = background_area->y; } if (l->next == NULL) cell_background.height = background_area->height - (cell_background.y - background_area->y); cell_background.x = background_area->x; cell_background.width = background_area->width; } if (callback (cell->renderer, &cell_alloc, &cell_background, callback_data)) break; } g_slist_free_full (allocated_cells, (GDestroyNotify)allocated_cell_free); } static void gtk_cell_area_box_apply_attributes (GtkCellArea *area, GtkTreeModel *tree_model, GtkTreeIter *iter, gboolean is_expander, gboolean is_expanded) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); int i; /* Call the parent class to apply the attributes */ GTK_CELL_AREA_CLASS (gtk_cell_area_box_parent_class)->apply_attributes (area, tree_model, iter, is_expander, is_expanded); /* Update visible state for cell groups */ for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); GList *list; group->visible = FALSE; for (list = group->cells; list && group->visible == FALSE; list = list->next) { CellInfo *info = list->data; if (gtk_cell_renderer_get_visible (info->renderer)) group->visible = TRUE; } } } static void gtk_cell_area_box_set_cell_property (GtkCellArea *area, GtkCellRenderer *renderer, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *node; CellInfo *info; gboolean rebuild = FALSE; gboolean val; GtkPackType pack_type; node = g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find); if (!node) return; info = node->data; switch (prop_id) { case CELL_PROP_EXPAND: val = g_value_get_boolean (value); if (info->expand != val) { info->expand = val; rebuild = TRUE; } break; case CELL_PROP_ALIGN: val = g_value_get_boolean (value); if (info->align != val) { info->align = val; rebuild = TRUE; } break; case CELL_PROP_FIXED_SIZE: val = g_value_get_boolean (value); if (info->fixed != val) { info->fixed = val; rebuild = TRUE; } break; case CELL_PROP_PACK_TYPE: pack_type = g_value_get_enum (value); if (info->pack != pack_type) { info->pack = pack_type; rebuild = TRUE; } break; default: GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID (area, prop_id, pspec); break; } /* Groups need to be rebuilt */ if (rebuild) cell_groups_rebuild (box); } static void gtk_cell_area_box_get_cell_property (GtkCellArea *area, GtkCellRenderer *renderer, guint prop_id, GValue *value, GParamSpec *pspec) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *node; CellInfo *info; node = g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find); if (!node) return; info = node->data; switch (prop_id) { case CELL_PROP_EXPAND: g_value_set_boolean (value, info->expand); break; case CELL_PROP_ALIGN: g_value_set_boolean (value, info->align); break; case CELL_PROP_FIXED_SIZE: g_value_set_boolean (value, info->fixed); break; case CELL_PROP_PACK_TYPE: g_value_set_enum (value, info->pack); break; default: GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID (area, prop_id, pspec); break; } } static GtkCellAreaContext * gtk_cell_area_box_create_context (GtkCellArea *area) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaContext *context = (GtkCellAreaContext *)g_object_new (GTK_TYPE_CELL_AREA_BOX_CONTEXT, "area", area, NULL); priv->contexts = g_slist_prepend (priv->contexts, context); g_object_weak_ref (G_OBJECT (context), (GWeakNotify)context_weak_notify, box); /* Tell the new group about our cell layout */ init_context_group (box, GTK_CELL_AREA_BOX_CONTEXT (context)); return context; } static GtkCellAreaContext * gtk_cell_area_box_copy_context (GtkCellArea *area, GtkCellAreaContext *context) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaContext *copy = (GtkCellAreaContext *)_gtk_cell_area_box_context_copy (GTK_CELL_AREA_BOX (area), GTK_CELL_AREA_BOX_CONTEXT (context)); priv->contexts = g_slist_prepend (priv->contexts, copy); g_object_weak_ref (G_OBJECT (copy), (GWeakNotify)context_weak_notify, box); return copy; } static GtkSizeRequestMode gtk_cell_area_box_get_request_mode (GtkCellArea *area) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); return (priv->orientation) == GTK_ORIENTATION_HORIZONTAL ? GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH : GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT; } static void compute_size (GtkCellAreaBox *box, GtkOrientation orientation, GtkCellAreaBoxContext *context, GtkWidget *widget, int for_size, int *minimum_size, int *natural_size) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellArea *area = GTK_CELL_AREA (box); GList *list; int i; int min_size = 0; int nat_size = 0; for (i = 0; i < priv->groups->len; i++) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); int group_min_size = 0; int group_nat_size = 0; for (list = group->cells; list; list = list->next) { CellInfo *info = list->data; int renderer_min_size, renderer_nat_size; if (!gtk_cell_renderer_get_visible (info->renderer)) continue; gtk_cell_area_request_renderer (area, info->renderer, orientation, widget, for_size, &renderer_min_size, &renderer_nat_size); if (orientation == priv->orientation) { if (min_size > 0) { min_size += priv->spacing; nat_size += priv->spacing; } if (group_min_size > 0) { group_min_size += priv->spacing; group_nat_size += priv->spacing; } min_size += renderer_min_size; nat_size += renderer_nat_size; group_min_size += renderer_min_size; group_nat_size += renderer_nat_size; } else { min_size = MAX (min_size, renderer_min_size); nat_size = MAX (nat_size, renderer_nat_size); group_min_size = MAX (group_min_size, renderer_min_size); group_nat_size = MAX (group_nat_size, renderer_nat_size); } } if (orientation == GTK_ORIENTATION_HORIZONTAL) { if (for_size < 0) _gtk_cell_area_box_context_push_group_width (context, group->id, group_min_size, group_nat_size); else _gtk_cell_area_box_context_push_group_width_for_height (context, group->id, for_size, group_min_size, group_nat_size); } else { if (for_size < 0) _gtk_cell_area_box_context_push_group_height (context, group->id, group_min_size, group_nat_size); else _gtk_cell_area_box_context_push_group_height_for_width (context, group->id, for_size, group_min_size, group_nat_size); } } *minimum_size = min_size; *natural_size = nat_size; /* Update rtl state for focus navigation to work */ priv->rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL); } static GtkRequestedSize * get_group_sizes (GtkCellArea *area, CellGroup *group, GtkOrientation orientation, GtkWidget *widget, int *n_sizes) { GtkRequestedSize *sizes; GList *l; int i; *n_sizes = count_visible_cells (group, NULL); sizes = g_new (GtkRequestedSize, *n_sizes); for (l = group->cells, i = 0; l; l = l->next) { CellInfo *info = l->data; if (!gtk_cell_renderer_get_visible (info->renderer)) continue; sizes[i].data = info; gtk_cell_area_request_renderer (area, info->renderer, orientation, widget, -1, &sizes[i].minimum_size, &sizes[i].natural_size); i++; } return sizes; } static void compute_group_size_for_opposing_orientation (GtkCellAreaBox *box, CellGroup *group, GtkWidget *widget, int for_size, int *minimum_size, int *natural_size) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellArea *area = GTK_CELL_AREA (box); /* Exception for single cell groups */ if (group->n_cells == 1) { CellInfo *info = group->cells->data; gtk_cell_area_request_renderer (area, info->renderer, OPPOSITE_ORIENTATION (priv->orientation), widget, for_size, minimum_size, natural_size); } else { GtkRequestedSize *orientation_sizes; CellInfo *info; int n_sizes, i; int avail_size = for_size; int extra_size, extra_extra; int min_size = 0, nat_size = 0; orientation_sizes = get_group_sizes (area, group, priv->orientation, widget, &n_sizes); /* First naturally allocate the cells in the group into the for_size */ avail_size -= (n_sizes - 1) * priv->spacing; for (i = 0; i < n_sizes; i++) avail_size -= orientation_sizes[i].minimum_size; if (avail_size > 0) avail_size = gtk_distribute_natural_allocation (avail_size, n_sizes, orientation_sizes); else avail_size = 0; /* Calculate/distribute expand for cells */ if (group->expand_cells > 0) { extra_size = avail_size / group->expand_cells; extra_extra = avail_size % group->expand_cells; } else extra_size = extra_extra = 0; for (i = 0; i < n_sizes; i++) { int cell_min, cell_nat; info = orientation_sizes[i].data; if (info->expand) { orientation_sizes[i].minimum_size += extra_size; if (extra_extra) { orientation_sizes[i].minimum_size++; extra_extra--; } } gtk_cell_area_request_renderer (area, info->renderer, OPPOSITE_ORIENTATION (priv->orientation), widget, orientation_sizes[i].minimum_size, &cell_min, &cell_nat); min_size = MAX (min_size, cell_min); nat_size = MAX (nat_size, cell_nat); } *minimum_size = min_size; *natural_size = nat_size; g_free (orientation_sizes); } } static void compute_size_for_opposing_orientation (GtkCellAreaBox *box, GtkCellAreaBoxContext *context, GtkWidget *widget, int for_size, int *minimum_size, int *natural_size) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); CellGroup *group; GtkRequestedSize *orientation_sizes; int n_groups, n_expand_groups, i; int avail_size = for_size; int extra_size, extra_extra; int min_size = 0, nat_size = 0; n_expand_groups = count_expand_groups (box); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) orientation_sizes = _gtk_cell_area_box_context_get_widths (context, &n_groups); else orientation_sizes = _gtk_cell_area_box_context_get_heights (context, &n_groups); /* First start by naturally allocating space among groups of cells */ avail_size -= (n_groups - 1) * priv->spacing; for (i = 0; i < n_groups; i++) avail_size -= orientation_sizes[i].minimum_size; if (avail_size > 0) avail_size = gtk_distribute_natural_allocation (avail_size, n_groups, orientation_sizes); else avail_size = 0; /* Calculate/distribute expand for groups */ if (n_expand_groups > 0) { extra_size = avail_size / n_expand_groups; extra_extra = avail_size % n_expand_groups; } else extra_size = extra_extra = 0; /* Now we need to naturally allocate sizes for cells in each group * and push the height-for-width for each group accordingly while * accumulating the overall height-for-width for this row. */ for (i = 0; i < n_groups; i++) { int group_min, group_nat; int group_idx = GPOINTER_TO_INT (orientation_sizes[i].data); group = &g_array_index (priv->groups, CellGroup, group_idx); if (group->expand_cells > 0) { orientation_sizes[i].minimum_size += extra_size; if (extra_extra) { orientation_sizes[i].minimum_size++; extra_extra--; } } /* Now we have the allocation for the group, * request its height-for-width */ compute_group_size_for_opposing_orientation (box, group, widget, orientation_sizes[i].minimum_size, &group_min, &group_nat); min_size = MAX (min_size, group_min); nat_size = MAX (nat_size, group_nat); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { _gtk_cell_area_box_context_push_group_height_for_width (context, group_idx, for_size, group_min, group_nat); } else { _gtk_cell_area_box_context_push_group_width_for_height (context, group_idx, for_size, group_min, group_nat); } } *minimum_size = min_size; *natural_size = nat_size; g_free (orientation_sizes); /* Update rtl state for focus navigation to work */ priv->rtl = (priv->orientation == GTK_ORIENTATION_HORIZONTAL && gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL); } static void gtk_cell_area_box_get_preferred_width (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int *minimum_width, int *natural_width) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxContext *box_context; int min_width, nat_width; g_return_if_fail (GTK_IS_CELL_AREA_BOX_CONTEXT (context)); box_context = GTK_CELL_AREA_BOX_CONTEXT (context); /* Compute the size of all renderers for current row data, * bumping cell alignments in the context along the way */ compute_size (box, GTK_ORIENTATION_HORIZONTAL, box_context, widget, -1, &min_width, &nat_width); if (minimum_width) *minimum_width = min_width; if (natural_width) *natural_width = nat_width; } static void gtk_cell_area_box_get_preferred_height (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int *minimum_height, int *natural_height) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxContext *box_context; int min_height, nat_height; g_return_if_fail (GTK_IS_CELL_AREA_BOX_CONTEXT (context)); box_context = GTK_CELL_AREA_BOX_CONTEXT (context); /* Compute the size of all renderers for current row data, * bumping cell alignments in the context along the way */ compute_size (box, GTK_ORIENTATION_VERTICAL, box_context, widget, -1, &min_height, &nat_height); if (minimum_height) *minimum_height = min_height; if (natural_height) *natural_height = nat_height; } static void gtk_cell_area_box_get_preferred_height_for_width (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int width, int *minimum_height, int *natural_height) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaBoxContext *box_context = GTK_CELL_AREA_BOX_CONTEXT (context); int min_height, nat_height; g_return_if_fail (GTK_IS_CELL_AREA_BOX_CONTEXT (context)); if (priv->orientation == GTK_ORIENTATION_VERTICAL) { /* Add up vertical requests of height for width and push * the overall cached sizes for alignments */ compute_size (box, priv->orientation, box_context, widget, width, &min_height, &nat_height); } else { /* Juice: virtually allocate cells into the for_width using the * alignments and then return the overall height for that width, * and cache it */ compute_size_for_opposing_orientation (box, box_context, widget, width, &min_height, &nat_height); } if (minimum_height) *minimum_height = min_height; if (natural_height) *natural_height = nat_height; } static void gtk_cell_area_box_get_preferred_width_for_height (GtkCellArea *area, GtkCellAreaContext *context, GtkWidget *widget, int height, int *minimum_width, int *natural_width) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GtkCellAreaBoxContext *box_context = GTK_CELL_AREA_BOX_CONTEXT (context); int min_width, nat_width; g_return_if_fail (GTK_IS_CELL_AREA_BOX_CONTEXT (context)); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { /* Add up horizontal requests of width for height and push * the overall cached sizes for alignments */ compute_size (box, priv->orientation, box_context, widget, height, &min_width, &nat_width); } else { /* Juice: horizontally allocate cells into the for_height using the * alignments and then return the overall width for that height, * and cache it */ compute_size_for_opposing_orientation (box, box_context, widget, height, &min_width, &nat_width); } if (minimum_width) *minimum_width = min_width; if (natural_width) *natural_width = nat_width; } enum { FOCUS_NONE, FOCUS_PREV, FOCUS_NEXT, FOCUS_LAST_CELL }; static gboolean gtk_cell_area_box_focus (GtkCellArea *area, GtkDirectionType direction) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (area); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); int cycle = FOCUS_NONE; gboolean cycled_focus = FALSE; GtkCellRenderer *focus_cell; focus_cell = gtk_cell_area_get_focus_cell (area); /* Special case, when there is no activatable cell, focus * is painted around the entire area... in this case we * let focus leave the area directly. */ if (focus_cell && !gtk_cell_area_is_activatable (area)) { gtk_cell_area_set_focus_cell (area, NULL); return FALSE; } switch (direction) { case GTK_DIR_TAB_FORWARD: cycle = priv->rtl ? FOCUS_PREV : FOCUS_NEXT; break; case GTK_DIR_TAB_BACKWARD: cycle = priv->rtl ? FOCUS_NEXT : FOCUS_PREV; break; case GTK_DIR_UP: if (priv->orientation == GTK_ORIENTATION_VERTICAL || !priv->last_focus_cell) cycle = FOCUS_PREV; else if (!focus_cell) cycle = FOCUS_LAST_CELL; break; case GTK_DIR_DOWN: if (priv->orientation == GTK_ORIENTATION_VERTICAL || !priv->last_focus_cell) cycle = FOCUS_NEXT; else if (!focus_cell) cycle = FOCUS_LAST_CELL; break; case GTK_DIR_LEFT: if (priv->orientation == GTK_ORIENTATION_HORIZONTAL || !priv->last_focus_cell) cycle = priv->rtl ? FOCUS_NEXT : FOCUS_PREV; else if (!focus_cell) cycle = FOCUS_LAST_CELL; break; case GTK_DIR_RIGHT: if (priv->orientation == GTK_ORIENTATION_HORIZONTAL || !priv->last_focus_cell) cycle = priv->rtl ? FOCUS_PREV : FOCUS_NEXT; else if (!focus_cell) cycle = FOCUS_LAST_CELL; break; default: break; } if (cycle == FOCUS_LAST_CELL) { gtk_cell_area_set_focus_cell (area, priv->last_focus_cell); cycled_focus = TRUE; } else if (cycle != FOCUS_NONE) { gboolean found_cell = FALSE; GList *list; int i; /* If there is no focused cell, focus on the first (or last) one */ if (!focus_cell) found_cell = TRUE; for (i = (cycle == FOCUS_NEXT) ? 0 : priv->groups->len -1; cycled_focus == FALSE && i >= 0 && i < priv->groups->len; i = (cycle == FOCUS_NEXT) ? i + 1 : i - 1) { CellGroup *group = &g_array_index (priv->groups, CellGroup, i); for (list = (cycle == FOCUS_NEXT) ? g_list_first (group->cells) : g_list_last (group->cells); cycled_focus == FALSE && list; list = (cycle == FOCUS_NEXT) ? list->next : list->prev) { CellInfo *info = list->data; if (info->renderer == focus_cell) found_cell = TRUE; else if (found_cell && /* Dont give focus to cells that are siblings to a focus cell */ gtk_cell_area_get_focus_from_sibling (area, info->renderer) == NULL) { gtk_cell_area_set_focus_cell (area, info->renderer); cycled_focus = TRUE; } } } } if (!cycled_focus) gtk_cell_area_set_focus_cell (area, NULL); return cycled_focus; } /************************************************************* * GtkCellLayoutIface * *************************************************************/ static void gtk_cell_area_box_cell_layout_init (GtkCellLayoutIface *iface) { iface->pack_start = gtk_cell_area_box_layout_pack_start; iface->pack_end = gtk_cell_area_box_layout_pack_end; iface->reorder = gtk_cell_area_box_layout_reorder; } static void gtk_cell_area_box_layout_pack_start (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, gboolean expand) { gtk_cell_area_box_pack_start (GTK_CELL_AREA_BOX (cell_layout), renderer, expand, FALSE, TRUE); } static void gtk_cell_area_box_layout_pack_end (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, gboolean expand) { gtk_cell_area_box_pack_end (GTK_CELL_AREA_BOX (cell_layout), renderer, expand, FALSE, TRUE); } static void gtk_cell_area_box_layout_reorder (GtkCellLayout *cell_layout, GtkCellRenderer *renderer, int position) { GtkCellAreaBox *box = GTK_CELL_AREA_BOX (cell_layout); GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); GList *node; CellInfo *info; node = g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find); if (node) { info = node->data; priv->cells = g_list_delete_link (priv->cells, node); priv->cells = g_list_insert (priv->cells, info, position); cell_groups_rebuild (box); } } /************************************************************* * Private interaction with GtkCellAreaBoxContext * *************************************************************/ gboolean _gtk_cell_area_box_group_visible (GtkCellAreaBox *box, int group_idx) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); CellGroup *group; g_assert (group_idx >= 0 && group_idx < priv->groups->len); group = &g_array_index (priv->groups, CellGroup, group_idx); return group->visible; } /************************************************************* * API * *************************************************************/ /** * gtk_cell_area_box_new: * * Creates a new #GtkCellAreaBox. * * Returns: a newly created #GtkCellAreaBox */ GtkCellArea * gtk_cell_area_box_new (void) { return (GtkCellArea *)g_object_new (GTK_TYPE_CELL_AREA_BOX, NULL); } /** * gtk_cell_area_box_pack_start: * @box: a #GtkCellAreaBox * @renderer: the #GtkCellRenderer to add * @expand: whether @renderer should receive extra space when the area receives * more than its natural size * @align: whether @renderer should be aligned in adjacent rows * @fixed: whether @renderer should have the same size in all rows * * Adds @renderer to @box, packed with reference to the start of @box. * * The @renderer is packed after any other #GtkCellRenderer packed * with reference to the start of @box. */ void gtk_cell_area_box_pack_start (GtkCellAreaBox *box, GtkCellRenderer *renderer, gboolean expand, gboolean align, gboolean fixed) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); CellInfo *info; g_return_if_fail (GTK_IS_CELL_AREA_BOX (box)); g_return_if_fail (GTK_IS_CELL_RENDERER (renderer)); if (g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find)) { g_warning ("Refusing to add the same cell renderer to a GtkCellAreaBox twice"); return; } info = cell_info_new (renderer, GTK_PACK_START, expand, align, fixed); priv->cells = g_list_append (priv->cells, info); cell_groups_rebuild (box); } /** * gtk_cell_area_box_pack_end: * @box: a #GtkCellAreaBox * @renderer: the #GtkCellRenderer to add * @expand: whether @renderer should receive extra space when the area receives * more than its natural size * @align: whether @renderer should be aligned in adjacent rows * @fixed: whether @renderer should have the same size in all rows * * Adds @renderer to @box, packed with reference to the end of @box. * * The @renderer is packed after (away from end of) any other * #GtkCellRenderer packed with reference to the end of @box. */ void gtk_cell_area_box_pack_end (GtkCellAreaBox *box, GtkCellRenderer *renderer, gboolean expand, gboolean align, gboolean fixed) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); CellInfo *info; g_return_if_fail (GTK_IS_CELL_AREA_BOX (box)); g_return_if_fail (GTK_IS_CELL_RENDERER (renderer)); if (g_list_find_custom (priv->cells, renderer, (GCompareFunc)cell_info_find)) { g_warning ("Refusing to add the same cell renderer to a GtkCellArea twice"); return; } info = cell_info_new (renderer, GTK_PACK_END, expand, align, fixed); priv->cells = g_list_append (priv->cells, info); cell_groups_rebuild (box); } /** * gtk_cell_area_box_get_spacing: * @box: a #GtkCellAreaBox * * Gets the spacing added between cell renderers. * * Returns: the space added between cell renderers in @box. */ int gtk_cell_area_box_get_spacing (GtkCellAreaBox *box) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); g_return_val_if_fail (GTK_IS_CELL_AREA_BOX (box), 0); return priv->spacing; } /** * gtk_cell_area_box_set_spacing: * @box: a #GtkCellAreaBox * @spacing: the space to add between #GtkCellRenderers * * Sets the spacing to add between cell renderers in @box. */ void gtk_cell_area_box_set_spacing (GtkCellAreaBox *box, int spacing) { GtkCellAreaBoxPrivate *priv = gtk_cell_area_box_get_instance_private (box); g_return_if_fail (GTK_IS_CELL_AREA_BOX (box)); if (priv->spacing != spacing) { priv->spacing = spacing; g_object_notify (G_OBJECT (box), "spacing"); /* Notify that size needs to be requested again */ reset_contexts (box); } }