bar_info.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。

	GtkWidget *label_file_time;

	GtkWidget *keyword_view;
	GtkWidget *keyword_treeview;

	GtkWidget *comment_view;

	GtkWidget *button_save;
	GtkWidget *button_set_add;
	GtkWidget *button_set_replace;

	gchar *path;

	gint changed;
	gint save_timeout_id;

	GList *(*list_func)(gpointer);
	gpointer list_data;
};


static GList *bar_list = NULL;


static void bar_info_write(BarInfoData *bd)
{
	GList *list;
	gchar *comment;

	if (!bd->path) return;

	list = keyword_list_pull(bd->keyword_view);
	comment = comment_pull(bd->comment_view);

	comment_cache_write(bd->path, list, comment);

	path_list_free(list);
	g_free(comment);

	bd->changed = FALSE;
	gtk_widget_set_sensitive(bd->button_save, FALSE);
}

static gint bar_info_autosave(gpointer data)
{
	BarInfoData *bd = data;

	bar_info_write(bd);

	bd->save_timeout_id = -1;

	return FALSE;
}

static void bar_info_save_update(BarInfoData *bd, gint enable)
{
	if (bd->save_timeout_id != -1)
		{
		g_source_remove(bd->save_timeout_id);
		bd->save_timeout_id = -1;
		}
	if (enable)
		{
		bd->save_timeout_id = g_timeout_add(BAR_KEYWORD_AUTOSAVE_TIME, bar_info_autosave, bd);
		}
}

static gint bar_keyword_list_find(GList *list, const gchar *keyword)
{
	while (list)
		{
		gchar *haystack = list->data;

		if (haystack && keyword && strcmp(haystack, keyword) == 0) return TRUE;

		list = list->next;
		}

	return FALSE;
}

static void bar_keyword_list_sync(BarInfoData *bd, GList *keywords)
{
	GList *list;
	GtkListStore *store;
	GtkTreeIter iter;

	list = history_list_get_by_key("keywords");
	if (!list)
		{
		/* blank? set up a few example defaults */

		gint i = 0;

		while (keyword_favorite_defaults[i] != NULL)
			{
			history_list_add_to_key("keywords", _(keyword_favorite_defaults[i]), 0);
			i++;
			}

		list = history_list_get_by_key("keywords");
		}

	store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(bd->keyword_treeview)));

	gtk_list_store_clear(store);

	list = g_list_last(list);
	while (list)
		{
		gchar *key = list->data;

		gtk_list_store_append(store, &iter);
		gtk_list_store_set(store, &iter, KEYWORD_COLUMN_TOGGLE, bar_keyword_list_find(keywords, key),
						 KEYWORD_COLUMN_TEXT, key, -1);

		list = list->prev;
		}
}

static void bar_info_keyword_update_all(void)
{
	GList *work;

	work = bar_list;
	while (work)
		{
		BarInfoData *bd;
		GList *keywords;

		bd = work->data;
		work = work->next;

		keywords = keyword_list_pull(bd->keyword_view);
		bar_keyword_list_sync(bd, keywords);
		path_list_free(keywords);
		}
}

static void bar_info_update(BarInfoData *bd)
{
	GList *keywords = NULL;
	gchar *comment = NULL;

	if (bd->label_file_name)
		{
		gtk_label_set_text(GTK_LABEL(bd->label_file_name), (bd->path) ? filename_from_path(bd->path) : "");
		}
	if (bd->label_file_time)
		{
		gtk_label_set_text(GTK_LABEL(bd->label_file_time), (bd->path) ? text_from_time(filetime(bd->path)) : "");
		}

	if (comment_cache_read(bd->path, &keywords, &comment))
		{
		keyword_list_push(bd->keyword_view, keywords);
		gtk_text_buffer_set_text(gtk_text_view_get_buffer(GTK_TEXT_VIEW(bd->comment_view)),
					 (comment) ? comment : "", -1);

		bar_keyword_list_sync(bd, keywords);

		path_list_free(keywords);
		g_free(comment);
		}
	else
		{
		gtk_text_buffer_set_text(gtk_text_view_get_buffer(GTK_TEXT_VIEW(bd->keyword_view)), "", -1);
		gtk_text_buffer_set_text(gtk_text_view_get_buffer(GTK_TEXT_VIEW(bd->comment_view)), "", -1);

		bar_keyword_list_sync(bd, NULL);
		}

	bar_info_save_update(bd, FALSE);
	bd->changed = FALSE;
	gtk_widget_set_sensitive(bd->button_save, FALSE);

	gtk_widget_set_sensitive(bd->group_box, (bd->path != NULL));
}

void bar_info_set(GtkWidget *bar, const gchar *path)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	if (bd->changed) bar_info_write(bd);

	g_free(bd->path);
	bd->path = g_strdup(path);

	bar_info_update(bd);
}

void bar_info_maint_renamed(GtkWidget *bar, const gchar *path)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	g_free(bd->path);
	bd->path = g_strdup(path);

	if (bd->label_file_name)
		{
		gtk_label_set_text(GTK_LABEL(bd->label_file_name), (bd->path) ? filename_from_path(bd->path) : "");
		}
}

gint bar_info_event(GtkWidget *bar, GdkEvent *event)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return FALSE;

	if (GTK_WIDGET_HAS_FOCUS(bd->keyword_view)) return gtk_widget_event(bd->keyword_view, event);
	if (GTK_WIDGET_HAS_FOCUS(bd->comment_view)) return gtk_widget_event(bd->comment_view, event);

	return FALSE;
}

static void bar_info_keyword_set(BarInfoData *bd, const gchar *keyword, gint active)
{
	GList *list;
	gint found;

	if (!keyword) return;

	list = keyword_list_pull(bd->keyword_view);
	found = bar_keyword_list_find(list, keyword);

	if (active != found)
		{
		if (found)
			{
			GList *work = list;

			while (work)
				{
				gchar *key = work->data;
				work = work->next;

				if (key && keyword && strcmp(key, keyword) == 0)
					{
					list = g_list_remove(list, key);
					g_free(key);
					}
				}
			}
		else
			{
			list = g_list_append(list, g_strdup(keyword));
			}

		keyword_list_push(bd->keyword_view, list);
		}

	path_list_free(list);
}

static void bar_info_keyword_toggle(GtkCellRendererToggle *toggle, const gchar *path, gpointer data)
{
	BarInfoData *bd = data;
	GtkTreeModel *store;
	GtkTreeIter iter;
	GtkTreePath *tpath;
	gchar *key = NULL;
	gboolean active;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(bd->keyword_treeview));

	tpath = gtk_tree_path_new_from_string(path);
	gtk_tree_model_get_iter(store, &iter, tpath);
	gtk_tree_path_free(tpath);

	gtk_tree_model_get(store, &iter, KEYWORD_COLUMN_TOGGLE, &active,
					 KEYWORD_COLUMN_TEXT, &key, -1);
	active = (!active);
	gtk_list_store_set(GTK_LIST_STORE(store), &iter, KEYWORD_COLUMN_TOGGLE, active, -1);

	bar_info_keyword_set(bd, key, active);
	g_free(key);
}

static void bar_info_save(GtkWidget *button, gpointer data)
{
	BarInfoData *bd = data;

	bar_info_save_update(bd, FALSE);
	bar_info_write(bd);
}

static void bar_info_set_selection(BarInfoData *bd, gint add)
{
	GList *keywords;
	GList *list = NULL;
	GList *work;

	if (!bd->list_func) return;

	keywords = keyword_list_pull(bd->keyword_view);
	if (!keywords && add) return;

	list = bd->list_func(bd->list_data);
	work = list;
	while (work)
		{
		const gchar *path = work->data;
		work = work->next;

		metadata_set_keywords(path, keywords, add);
		}

	path_list_free(list);
	path_list_free(keywords);
}

static void bar_info_set_add(GtkWidget *button, gpointer data)
{
	BarInfoData *bd = data;

	bar_info_set_selection(bd, TRUE);
}

static void bar_info_set_replace(GtkWidget *button, gpointer data)
{
	BarInfoData *bd = data;

	bar_info_set_selection(bd, FALSE);
}

static void bar_info_changed(GtkTextBuffer *buffer, gpointer data)
{
	BarInfoData *bd = data;

	bd->changed = TRUE;
	gtk_widget_set_sensitive(bd->button_save, TRUE);

	bar_info_save_update(bd, TRUE);
}

void bar_info_close(GtkWidget *bar)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	gtk_widget_destroy(bd->vbox);
}

static void bar_info_destroy(GtkWidget *widget, gpointer data)
{
	BarInfoData *bd = data;

	if (bd->changed) bar_info_write(bd);
	bar_info_save_update(bd, FALSE);

	bar_list = g_list_remove(bar_list, bd);

	g_free(bd->path);

	g_free(bd);
}

GtkWidget *bar_info_new(const gchar *path, gint metadata_only, GtkWidget *bounding_widget)
{
	BarInfoData *bd;
	GtkWidget *box;
	GtkWidget *hbox;
	GtkWidget *table;
	GtkWidget *scrolled;
	GtkTextBuffer *buffer;
	GtkWidget *label;
	GtkWidget *tbar;
	GtkListStore *store;
	GtkTreeViewColumn *column;
	GtkCellRenderer *renderer;

	bd = g_new0(BarInfoData, 1);

	bd->list_func = NULL;
	bd->list_data = NULL;

	bd->vbox = gtk_vbox_new(FALSE, PREF_PAD_GAP);
	g_object_set_data(G_OBJECT(bd->vbox), "bar_info_data", bd);
	g_signal_connect(G_OBJECT(bd->vbox), "destroy",
			 G_CALLBACK(bar_info_destroy), bd);

	if (!metadata_only)
		{
		hbox = pref_box_new(bd->vbox, FALSE, GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);

		label = sizer_new(bd->vbox, bounding_widget, SIZER_POS_LEFT);
		gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 0);
		gtk_widget_show(label);

		label = gtk_label_new(_("Keywords"));
		pref_label_bold(label, TRUE, FALSE);
		gtk_box_pack_start(GTK_BOX(hbox), label, TRUE, TRUE, 0);
		gtk_widget_show(label);
		}

	bd->group_box = pref_box_new(bd->vbox, TRUE, GTK_ORIENTATION_VERTICAL, PREF_PAD_GAP);

	if (!metadata_only)
		{
		GtkWidget *table;

		table = pref_table_new(bd->group_box, 2, 2, FALSE, FALSE);

		bd->label_file_name = table_add_line(table, 0, 0, _("Filename:"), NULL);
		bd->label_file_time = table_add_line(table, 0, 1, _("File date:"), NULL);
		}
	else
		{
		bd->label_file_name = NULL;
		bd->label_file_time = NULL;
		}

	table = gtk_table_new(3, 1, TRUE);
	gtk_table_set_row_spacings(GTK_TABLE(table), PREF_PAD_GAP);
	gtk_box_pack_start(GTK_BOX(bd->group_box), table, TRUE, TRUE, 0);
	gtk_widget_show(table);

	/* keyword entry */

	box = gtk_vbox_new(FALSE, 0);
	gtk_table_attach(GTK_TABLE(table), box, 0, 1, 0, 2,
			 GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
	gtk_widget_show(box);

	label = pref_label_new(box, _("Keywords:"));
	gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
	pref_label_bold(label, TRUE, FALSE);

	hbox = pref_box_new(box, TRUE, GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);

	scrolled = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled), GTK_SHADOW_IN);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
				       GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_box_pack_start(GTK_BOX(hbox), scrolled, TRUE, TRUE, 0);
	gtk_widget_show(scrolled);

	bd->keyword_view = gtk_text_view_new();
	gtk_container_add(GTK_CONTAINER(scrolled), bd->keyword_view);
	gtk_widget_show(bd->keyword_view);

	buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bd->keyword_view));
	g_signal_connect(G_OBJECT(buffer), "changed",
			 G_CALLBACK(bar_info_changed), bd);

	scrolled = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled), GTK_SHADOW_IN);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
				       GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_box_pack_start(GTK_BOX(hbox), scrolled, TRUE, TRUE, 0);
	gtk_widget_show(scrolled);

	store = gtk_list_store_new(2, G_TYPE_BOOLEAN, G_TYPE_STRING);
	bd->keyword_treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store));
	g_object_unref(store);

	gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(bd->keyword_treeview), FALSE);

	if (metadata_only)
		{
		gtk_tree_view_set_search_column(GTK_TREE_VIEW(bd->keyword_treeview), KEYWORD_COLUMN_TEXT);
		}
	else
		{
		gtk_tree_view_set_enable_search(GTK_TREE_VIEW(bd->keyword_treeview), FALSE);
		}

	column = gtk_tree_view_column_new();
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_AUTOSIZE);

	renderer = gtk_cell_renderer_toggle_new();
	gtk_tree_view_column_pack_start(column, renderer, FALSE);
	gtk_tree_view_column_add_attribute(column, renderer, "active", KEYWORD_COLUMN_TOGGLE);
	g_signal_connect(G_OBJECT(renderer), "toggled",
			 G_CALLBACK(bar_info_keyword_toggle), bd);

	renderer = gtk_cell_renderer_text_new();
	gtk_tree_view_column_pack_start(column, renderer, TRUE);
	gtk_tree_view_column_add_attribute(column, renderer, "text", KEYWORD_COLUMN_TEXT);

	gtk_tree_view_append_column(GTK_TREE_VIEW(bd->keyword_treeview), column);

	gtk_container_add(GTK_CONTAINER(scrolled), bd->keyword_treeview);
	gtk_widget_show(bd->keyword_treeview);

	/* comment entry */

	box = gtk_vbox_new(FALSE, 0);
	gtk_table_attach(GTK_TABLE(table), box, 0, 1, 2, 3,
			 GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
	gtk_widget_show(box);

	label = pref_label_new(box, _("Comment:"));
	gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
	pref_label_bold(label, TRUE, FALSE);

	scrolled = gtk_scrolled_window_new(NULL, NULL);
	gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolled), GTK_SHADOW_IN);
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
				       GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
	gtk_box_pack_start(GTK_BOX(box), scrolled, TRUE, TRUE, 0);
	gtk_widget_show(scrolled);

	bd->comment_view = gtk_text_view_new();
	gtk_container_add(GTK_CONTAINER(scrolled), bd->comment_view);
	gtk_widget_show(bd->comment_view);

	buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(bd->comment_view));
	g_signal_connect(G_OBJECT(buffer), "changed",
			 G_CALLBACK(bar_info_changed), bd);

	/* toolbar */

	tbar = pref_toolbar_new(bd->group_box, GTK_TOOLBAR_ICONS);

	pref_toolbar_button(tbar, GTK_STOCK_INDEX, NULL, FALSE,
			_("Edit favorite keywords list."),
			G_CALLBACK(bar_keyword_edit_cb), bd);
	pref_toolbar_spacer(tbar);
	bd->button_set_add = pref_toolbar_button(tbar, GTK_STOCK_ADD, NULL, FALSE,
			_("Add keywords to selected files"),
			G_CALLBACK(bar_info_set_add), bd);
	bd->button_set_replace = pref_toolbar_button(tbar, GTK_STOCK_CONVERT, NULL, FALSE,
			_("Add keywords to selected files, replacing the existing ones."),
			G_CALLBACK(bar_info_set_replace), bd);
	pref_toolbar_spacer(tbar);
	bd->button_save = pref_toolbar_button(tbar, GTK_STOCK_SAVE, NULL, FALSE,
			_("Save comment now"),
			G_CALLBACK(bar_info_save), bd);

	bd->save_timeout_id = -1;

	bd->path = g_strdup(path);
	bar_info_update(bd);

	bar_info_selection(bd->vbox, 0);

	bar_list = g_list_append(bar_list, bd);
	
	return bd->vbox;
}

void bar_info_set_selection_func(GtkWidget *bar, GList *(*list_func)(gpointer data), gpointer data)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	bd->list_func = list_func;
	bd->list_data = data;
}

void bar_info_selection(GtkWidget *bar, gint count)
{
	BarInfoData *bd;
	gint enable;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	enable = (count > 0 && bd->list_func != NULL);

	gtk_widget_set_sensitive(bd->button_set_add, enable);
	gtk_widget_set_sensitive(bd->button_set_replace, enable);
}

void bar_info_size_request(GtkWidget *bar, gint width)
{
	BarInfoData *bd;

	bd = g_object_get_data(G_OBJECT(bar), "bar_info_data");
	if (!bd) return;

	if (bd->label_file_name)
		{
		gtk_widget_set_size_request(bd->vbox, width, -1);
		}
}