collect-table.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

	return info;
}

static CollectInfo *collection_table_insert_point(CollectTable *ct, gint x, gint y)
{
	CollectInfo *info;
	GdkRectangle cell;
	gint after = FALSE;

	info = collection_table_insert_find(ct, NULL, &after, &cell, TRUE, x, y);

	if (info && after)
		{
		GList *work;

		work = g_list_find(ct->cd->list, info);
		if (work && work->next)
			{
			info = work->next->data;
			}
		else
			{
			info = NULL;
			}
		}

	return info;
}

static void collection_table_insert_marker(CollectTable *ct, CollectInfo *info, gint enable)
{
	gint row, col;
	gint after = FALSE;
	GdkRectangle cell;

	if (!enable)
		{
		if (ct->marker_window) gdk_window_destroy(ct->marker_window);
		ct->marker_window = NULL;

		return;
		}

	info = collection_table_insert_find(ct, info, &after, &cell, FALSE, 0, 0);

	/* this setting does not take into account (after), but since it is not really used... */
	ct->marker_info = info;

	row = -1;
	col = -1;

	if (!ct->marker_window)
		{
		GdkWindow *parent;
		GdkWindowAttr attributes;
		gint attributes_mask;
		GdkPixmap *pixmap;
		GdkBitmap *mask;
		GdkPixbuf *pb;
		gint w, h;

		parent = gtk_tree_view_get_bin_window(GTK_TREE_VIEW(ct->listview));

		pb = gdk_pixbuf_new_from_xpm_data((const char **)marker_xpm);
		gdk_pixbuf_render_pixmap_and_mask(pb, &pixmap, &mask, 128);
		gdk_pixbuf_unref(pb);

		gdk_drawable_get_size(pixmap, &w, &h);

		attributes.window_type = GDK_WINDOW_CHILD;
		attributes.wclass = GDK_INPUT_OUTPUT;
		attributes.width = w;
		attributes.height = h;
		attributes.event_mask = gtk_widget_get_events(ct->listview);
		attributes_mask = 0;

		ct->marker_window = gdk_window_new(parent, &attributes, attributes_mask);
		gdk_window_set_back_pixmap(ct->marker_window, pixmap, FALSE);
		gdk_window_shape_combine_mask(ct->marker_window, mask, 0, 0);

		g_object_unref(pixmap);
		if (mask) g_object_unref(mask);
		}

	if (info)
		{
		gint x, y;
		gint w, h;

		gdk_drawable_get_size(ct->marker_window, &w, &h);

		if (!after)
			{
			x = cell.x;
			}
		else
			{
			x = cell.x + cell.width;
			}
		x -= (w / 2);
		y = cell.y + (cell.height / 2) - (h / 2);

		gdk_window_move(ct->marker_window, x, y);
		gdk_window_clear(ct->marker_window);
		if (!gdk_window_is_visible(ct->marker_window)) gdk_window_show(ct->marker_window);
		}
	else
		{
		if (gdk_window_is_visible(ct->marker_window)) gdk_window_hide(ct->marker_window);
		}
}

/*
 *-------------------------------------------------------------------
 * mouse drag auto-scroll
 *-------------------------------------------------------------------
 */

static void collection_table_motion_update(CollectTable *ct, gint x, gint y, gint drop_event)
{
	CollectInfo *info;

	info = collection_table_find_data_by_coord(ct, x, y, NULL);

	if (drop_event)
		{
		tip_unschedule(ct);
		collection_table_insert_marker(ct, info, TRUE);
		}
	else
		{
		tip_update(ct, info);
		}
}

static gint collection_table_auto_scroll_idle_cb(gpointer data)
{
	CollectTable *ct = data;
	GdkWindow *window;
	gint x, y;
	gint w, h;

	if (ct->drop_idle_id == -1) return FALSE;

	window = ct->listview->window;
	gdk_window_get_pointer(window, &x, &y, NULL);
	gdk_drawable_get_size(window, &w, &h);
	if (x >= 0 && x < w && y >= 0 && y < h)
		{
		collection_table_motion_update(ct, x, y, TRUE);
		}

	ct->drop_idle_id = -1;
	return FALSE;
}

static gint collection_table_auto_scroll_notify_cb(GtkWidget *widget, gint x, gint y, gpointer data)
{
	CollectTable *ct = data;

	if (ct->drop_idle_id == -1) ct->drop_idle_id = g_idle_add(collection_table_auto_scroll_idle_cb, ct);

	return TRUE;
}

static void collection_table_scroll(CollectTable *ct, gint scroll)
{
	if (!scroll)
		{
		if (ct->drop_idle_id != -1)
			{
			g_source_remove(ct->drop_idle_id);
			ct->drop_idle_id = -1;
			}
		widget_auto_scroll_stop(ct->listview);
		collection_table_insert_marker(ct, NULL, FALSE);
		}
	else
		{
		GtkAdjustment *adj = gtk_tree_view_get_vadjustment(GTK_TREE_VIEW(ct->listview));
		widget_auto_scroll_start(ct->listview, adj, -1, thumb_max_height / 2,
					 collection_table_auto_scroll_notify_cb, ct);
		}
}

/*
 *-------------------------------------------------------------------
 * mouse callbacks
 *-------------------------------------------------------------------
 */

static gint collection_table_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	CollectTable *ct = data;

	collection_table_motion_update(ct, (gint)bevent->x, (gint)bevent->y, FALSE);

	return FALSE;
}

static gint collection_table_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	CollectTable *ct = data;
	GtkTreeIter iter;
	CollectInfo *info;

	tip_unschedule(ct);

	info = collection_table_find_data_by_coord(ct, (gint)bevent->x, (gint)bevent->y, &iter);

	ct->click_info = info;
	collection_table_selection_add(ct, ct->click_info, SELECTION_PRELIGHT, &iter);

	switch (bevent->button)
		{
		case 1:
			if (bevent->type == GDK_2BUTTON_PRESS)
				{
				if (info)
					{
					layout_image_set_collection(NULL, ct->cd, info);
					}
				}
			else if (!GTK_WIDGET_HAS_FOCUS(ct->listview))
				{
				gtk_widget_grab_focus(ct->listview);
				}
			break;
		case 3:
			ct->popup = collection_table_popup_menu(ct, (info != NULL));
			gtk_menu_popup(GTK_MENU(ct->popup), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
			break;
		default:
			break;
		}

	return TRUE;
}

static gint collection_table_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	CollectTable *ct = data;
	GtkTreeIter iter;
	CollectInfo *info = NULL;

	tip_schedule(ct);

	if ((gint)bevent->x != 0 || (gint) bevent->y != 0)
		{
		info = collection_table_find_data_by_coord(ct, (gint)bevent->x, (gint)bevent->y, &iter);
		}

	if (ct->click_info)
		{
		collection_table_selection_remove(ct, ct->click_info, SELECTION_PRELIGHT, NULL);
		}

	if (bevent->button == 1 &&
	    info && ct->click_info == info)
		{
		collection_table_set_focus(ct, info);

		if (bevent->state & GDK_CONTROL_MASK)
			{
			gint select;

			select = !INFO_SELECTED(info);
			if ((bevent->state & GDK_SHIFT_MASK) && ct->prev_selection)
				{
				collection_table_select_region_util(ct, ct->prev_selection, info, select);
				}
			else
				{
				collection_table_select_util(ct, info, select);
				}
			}
		else
			{
			collection_table_unselect_all(ct);

			if ((bevent->state & GDK_SHIFT_MASK) &&
			    ct->prev_selection)
				{
				collection_table_select_region_util(ct, ct->prev_selection, info, TRUE);
				}
			else
				{
				collection_table_select_util(ct, info, TRUE);
				}
			}
		}
	else if (bevent->button == 2 &&
		 info && ct->click_info == info)
		{
		collection_table_select_util(ct, info, !INFO_SELECTED(info));
		}

	return TRUE;
}

static gint collection_table_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
	CollectTable *ct = data;

	tip_unschedule(ct);
	return FALSE;
}

/*
 *-------------------------------------------------------------------
 * populate, add, insert, etc.
 *-------------------------------------------------------------------
 */

static gboolean collection_table_destroy_node_cb(GtkTreeModel *store, GtkTreePath *tpath, GtkTreeIter *iter, gpointer data)
{
	GList *list;

	gtk_tree_model_get(store, iter, CTABLE_COLUMN_POINTER, &list, -1);
	g_list_free(list);

	return FALSE;
}

static void collection_table_clear_store(CollectTable *ct)
{
	GtkTreeModel *store;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(ct->listview));
	gtk_tree_model_foreach(store, collection_table_destroy_node_cb, NULL);

	gtk_list_store_clear(GTK_LIST_STORE(store));
}

static GList *collection_table_add_row(CollectTable *ct, GtkTreeIter *iter)
{
	GtkListStore *store;
	GList *list = NULL;
	gint i;

	for (i = 0; i < ct->columns; i++) list = g_list_prepend(list, NULL);

	store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(ct->listview)));
	gtk_list_store_append(store, iter);
	gtk_list_store_set(store, iter, CTABLE_COLUMN_POINTER, list, -1);

	return list;
}

static void collection_table_populate(CollectTable *ct, gint resize)
{
	gint row;
	GList *work;

	collection_table_verify_selections(ct);

	collection_table_clear_store(ct);

	if (resize)
		{
		gint i;
		gint thumb_width;

		thumb_width = collection_table_get_icon_width(ct);

		for (i = 0; i < COLLECT_TABLE_MAX_COLUMNS; i++)
			{
			GtkTreeViewColumn *column;
			GtkCellRenderer *cell;
			GList *list;

			column = gtk_tree_view_get_column(GTK_TREE_VIEW(ct->listview), i);
			gtk_tree_view_column_set_visible(column, (i < ct->columns));
			gtk_tree_view_column_set_fixed_width(column, thumb_width + (THUMB_BORDER_PADDING * 6));

			list = gtk_tree_view_column_get_cell_renderers(column);
			cell = (list) ? list->data : NULL;
			g_list_free(list);

			if (cell && GQV_IS_CELL_RENDERER_ICON(cell))
				{
				g_object_set(G_OBJECT(cell), "fixed_width", thumb_width,
							     "fixed_height", thumb_max_height,
							     "show_text", ct->show_text, NULL);
				}
			}
		if (GTK_WIDGET_REALIZED(ct->listview)) gtk_tree_view_columns_autosize(GTK_TREE_VIEW(ct->listview));
		}

	row = -1;
	work = ct->cd->list;
	while (work)
		{
		GList *list;
		GtkTreeIter iter;

		row++;

		list = collection_table_add_row(ct, &iter);
		while (work && list)
			{
			list->data = work->data;
			list = list->next;
			work = work->next;
			}
		}

	ct->rows = row + 1;

	collection_table_update_focus(ct);
	collection_table_update_status(ct);
}

static void collection_table_populate_at_new_size(CollectTable *ct, gint w, gint h, gint force)
{
	gint new_cols;
	gint thumb_width;

	thumb_width = collection_table_get_icon_width(ct);

	new_cols = w / (thumb_width + (THUMB_BORDER_PADDING * 6));
	if (new_cols < 1) new_cols = 1;

	if (!force && new_cols == ct->columns) return;

	ct->columns = new_cols;

	collection_table_populate(ct, TRUE);

	if (debug) printf("col tab pop cols=%d rows=%d\n", ct->columns, ct->rows);
}

static void collection_table_sync(CollectTable *ct)
{
	GtkTreeModel *store;
	GtkTreeIter iter;
	GList *work;
	gint r, c;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(ct->listview));

	r = -1;
	c = 0;

	work = ct->cd->list;
	while (work)
		{
		GList *list;
		r++;
		c = 0;
		if (gtk_tree_model_iter_nth_child(store, &iter, NULL, r))
			{
			gtk_tree_model_get(store, &iter, CTABLE_COLUMN_POINTER, &list, -1);
			gtk_list_store_set(GTK_LIST_STORE(store), &iter, CTABLE_COLUMN_POINTER, list, -1);
			}
		else
			{
			list = collection_table_add_row(ct, &iter);
			}

		while (list)
			{
			CollectInfo *info;
			if (work)
				{
				info = work->data;
				work = work->next;
				c++;
				}
			else
				{
				info = NULL;
				}
			if (list)
				{
				list->data = info;
				list = list->next;
				}
			}
		}

	r++;
	while (gtk_tree_model_iter_nth_child(store, &iter, NULL, r))
		{
		GList *list;

		gtk_tree_model_get(store, &iter, CTABLE_COLUMN_POINTER, &list, -1);
		gtk_list_store_remove(GTK_LIST_STORE(store), &iter);
		g_list_free(list);
		}

	ct->rows = r;

	collection_table_update_focus(ct);
	collection_table_update_status(ct);
}

static gint collection_table_sync_idle_cb(gpointer data)
{
	CollectTable *ct = data;

	if (ct->sync_idle_id == -1) return FALSE;
	ct->sync_idle_id = -1;

	collection_table_sync(ct);
	return FALSE;
}

static void collection_table_sync_idle(CollectTable *ct)
{
	if (ct->sync_idle_id == -1)
		{
		/* high priority, the view needs to be resynced before a redraw
		 * may contain invalid pointers at this time
		 */
		ct->sync_idle_id = g_idle_add_full(G_PRIORITY_HIGH, collection_table_sync_idle_cb, ct, NULL);
		}
}

void collection_table_add_path_list(CollectTable *ct, GList *list)
{
	GList *work;

	if (!list) return;

	work = list;
	while (work)
		{
		collection_add(ct->cd, (gchar *)work->data, FALSE);
		work = work->next;
		}
}

static void collection_table_insert_path_list(CollectTable *ct, GList *list, CollectInfo *insert_info)
{
	GList *work;

	if (!list) return;

	work = list;
	while (work)
		{
		collection_insert(ct->cd, (gchar *)work->data, insert_info, FALSE);
		work = work->next;
		}

	collection_table_sync_idle(ct);
}

static void collection_table_move_by_info_list(CollectTable *ct, GList *info_list, gint row, gint col)
{
	GList *work;
	GList *insert_pos = NULL;
	GList *temp;
	CollectInfo *info;

	if (!info_list) return;

	info = collection_table_find_data(ct, row, col, NULL);

	if (!info_list->next && info_list->data == info) return;

	if (info) insert_pos = g_list_find(ct->cd->list, info);

	/* FIXME: this may get slow for large lists */
	work = info_list;
	while (insert_pos && work)
		{
		if (insert_pos->data == work->data)
			{
			insert_pos = insert_pos->next;
			work = info_list;
			}
		else
			{
			work = work->next;
			}
		}

	work = info_list;
	while (work)
		{
		ct->cd->list = g_list_remove(ct->cd->list, work->data);
		work = work->next;
		}

	/* place them back in */
	temp = g_list_copy(info_list);

	if (insert_pos)
		{
		ct->cd->list = uig_list_insert_list(ct->cd->list, insert_pos, temp);
		}
	else if (info)
		{
		ct->cd->list = g_list_concat(temp, ct->cd->list);
		}
	else
		{
		ct->cd->list = g_list_concat(ct->cd->list, temp);
		}

	ct->cd->changed = TRUE;

	collection_table_sync_idle(ct);
}


/*
 *-------------------------------------------------------------------
 * updating
 *-------------------------------------------------------------------
 */