view_file_icon.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。

				{
				vfi->click_fd = new_fd;
				vficon_select_none(vfi);
				vficon_select(vfi, new_fd);
				vficon_send_layout_select(vfi, new_fd);
				}
			}
		}

	if (stop_signal)
		{
		g_signal_stop_emission_by_name(GTK_OBJECT(widget), "key_press_event");
		tip_unschedule(vfi);
		}

	return stop_signal;
}

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

static gint vficon_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	ViewFileIcon *vfi = data;
	FileData *fd;

	fd = vficon_find_data_by_coord(vfi, (gint)bevent->x, (gint)bevent->y, NULL);
	tip_update(vfi, fd);

	return FALSE;
}

static gint vficon_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	ViewFileIcon *vfi = data;
	GtkTreeIter iter;
	FileData *fd;

	tip_unschedule(vfi);
	
	fd = vficon_find_data_by_coord(vfi, (gint)bevent->x, (gint)bevent->y, &iter);

	vfi->click_fd = fd;
	vficon_selection_add(vfi, vfi->click_fd, SELECTION_PRELIGHT, &iter);

	switch (bevent->button)
		{
		case 1:
			if (!GTK_WIDGET_HAS_FOCUS(vfi->listview))
				{
				gtk_widget_grab_focus(vfi->listview);
				}
#if 0
			if (bevent->type == GDK_2BUTTON_PRESS &&
			    vfi->layout)
				{
				vficon_selection_remove(vfi, vfi->click_fd, SELECTION_PRELIGHT, &iter);
				layout_image_full_screen_start(vfi->layout);
				}
#endif
			break;
		case 3:
			vfi->popup = vficon_pop_menu(vfi, (fd != NULL));
			gtk_menu_popup(GTK_MENU(vfi->popup), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
			break;
		default:
			break;
		}

	return TRUE;
}

static gint vficon_release_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	ViewFileIcon *vfi = data;
	GtkTreeIter iter;
	FileData *fd = NULL;
	gint was_selected = FALSE;

	tip_schedule(vfi);

	if ((gint)bevent->x != 0 || (gint) bevent->y != 0)
		{
		fd = vficon_find_data_by_coord(vfi, (gint)bevent->x, (gint)bevent->y, &iter);
		}

	if (vfi->click_fd)
		{
		vficon_selection_remove(vfi, vfi->click_fd, SELECTION_PRELIGHT, NULL);
		}

	if (fd) was_selected = (ICON_DATA(fd)->selected & SELECTION_SELECTED);

	if (bevent->button == 1 &&
	    fd && vfi->click_fd == fd)
		{
		vficon_set_focus(vfi, fd);
		
		if (bevent->state & GDK_CONTROL_MASK)
			{
			gint select;

			select = !(ICON_DATA(fd)->selected & SELECTION_SELECTED);
			if ((bevent->state & GDK_SHIFT_MASK) && vfi->prev_selection)
				{
				vficon_select_region_util(vfi, vfi->prev_selection, fd, select);
				}
			else
				{
				vficon_select_util(vfi, fd, select);
				}
			}
		else
			{
			vficon_select_none(vfi);

			if ((bevent->state & GDK_SHIFT_MASK) &&
			    vfi->prev_selection)
				{
				vficon_select_region_util(vfi, vfi->prev_selection, fd, TRUE);
				}
			else
				{
				vficon_select_util(vfi, fd, TRUE);
				was_selected = FALSE;
				}
			}
		}
	else if (bevent->button == 2 &&
		 fd && vfi->click_fd == fd)
		{
		vficon_select_util(vfi, fd, !(ICON_DATA(fd)->selected & SELECTION_SELECTED));
		}

	if (fd && !was_selected &&
	    (ICON_DATA(fd)->selected & SELECTION_SELECTED))
		{
		vficon_send_layout_select(vfi, fd);
		}

	return TRUE;
}

static gint vficon_leave_cb(GtkWidget *widget, GdkEventCrossing *event, gpointer data)
{
	ViewFileIcon *vfi = data;

	tip_unschedule(vfi);
	return FALSE;
}

/*
 *-------------------------------------------------------------------
 * population
 *-------------------------------------------------------------------
 */

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

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

	return FALSE;
}

static void vficon_clear_store(ViewFileIcon *vfi)
{
	GtkTreeModel *store;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
	gtk_tree_model_foreach(store, vficon_destroy_node_cb, NULL);

	gtk_list_store_clear(GTK_LIST_STORE(store));
}

static void vficon_set_thumb(ViewFileIcon *vfi, FileData *fd, GdkPixbuf *pb)
{
	GtkTreeModel *store;
	GtkTreeIter iter;
	GList *list;

	if (!vficon_find_iter(vfi, fd, &iter, NULL)) return;

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

	if (pb) g_object_ref(pb);
	if (fd->pixbuf) g_object_unref(fd->pixbuf);
	fd->pixbuf = pb;

	gtk_tree_model_get(store, &iter, FILE_COLUMN_POINTER, &list, -1);
	gtk_list_store_set(GTK_LIST_STORE(store), &iter, FILE_COLUMN_POINTER, list, -1);
}

static GList *vficon_add_row(ViewFileIcon *vfi, GtkTreeIter *iter)
{
	GtkListStore *store;
	GList *list = NULL;
	gint i;

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

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

	return list;
}

static void vficon_populate(ViewFileIcon *vfi, gint resize, gint keep_position)
{
	GtkTreeModel *store;
	GtkTreePath *tpath;
	gint row;
	GList *work;
	FileData *visible_fd = NULL;

	vficon_verify_selections(vfi);

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

	if (keep_position && GTK_WIDGET_REALIZED(vfi->listview) &&
	    gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(vfi->listview), 0, 0, &tpath, NULL, NULL, NULL))
		{
		GtkTreeIter iter;
		GList *list;

		gtk_tree_model_get_iter(store, &iter, tpath);
		gtk_tree_path_free(tpath);

		gtk_tree_model_get(store, &iter, FILE_COLUMN_POINTER, &list, -1);
		if (list) visible_fd = list->data;
		}

	vficon_clear_store(vfi);

	if (resize)
		{
		gint i;
		gint thumb_width;

		thumb_width = vficon_get_icon_width(vfi);

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

			column = gtk_tree_view_get_column(GTK_TREE_VIEW(vfi->listview), i);
			gtk_tree_view_column_set_visible(column, (i < vfi->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", vfi->show_text, NULL);
				}
			}
		if (GTK_WIDGET_REALIZED(vfi->listview)) gtk_tree_view_columns_autosize(GTK_TREE_VIEW(vfi->listview));
		}

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

		row++;

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

	if (visible_fd &&
	    gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(vfi->listview), 0, 0, &tpath, NULL, NULL, NULL))
		{
		GtkTreeIter iter;
		GList *list;

		gtk_tree_model_get_iter(store, &iter, tpath);
		gtk_tree_path_free(tpath);

		gtk_tree_model_get(store, &iter, FILE_COLUMN_POINTER, &list, -1);
		if (g_list_find(list, visible_fd) == NULL &&
		    vficon_find_iter(vfi, visible_fd, &iter, NULL))
			{
			tree_view_row_make_visible(GTK_TREE_VIEW(vfi->listview), &iter, FALSE);
			}
		}

	vfi->rows = row + 1;

	vficon_send_update(vfi);
	vficon_thumb_update(vfi);
}

static void vficon_populate_at_new_size(ViewFileIcon *vfi, gint w, gint h, gint force)
{
	gint new_cols;
	gint thumb_width;

	thumb_width = vficon_get_icon_width(vfi);

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

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

	vfi->columns = new_cols;

	vficon_populate(vfi, TRUE, TRUE);

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

static void vficon_sync(ViewFileIcon *vfi)
{
	GtkTreeModel *store;
	GtkTreeIter iter;
	GList *work;
	gint r, c;

	if (vfi->rows == 0) return;

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

	r = -1;
	c = 0;

	work = vfi->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, FILE_COLUMN_POINTER, &list, -1);
			gtk_list_store_set(GTK_LIST_STORE(store), &iter, FILE_COLUMN_POINTER, list, -1);
			}
		else
			{
			list = vficon_add_row(vfi, &iter);
			}
		
		while (list)
			{
			FileData *fd;
			if (work)
				{
				fd = work->data;
				work = work->next;
				c++;
				}
			else
				{
				fd = NULL;
				}
			if (list)
				{
				list->data = fd;
				list = list->next;
				}
			}
		}

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

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

	vfi->rows = r;

	vficon_update_focus(vfi);
}

static gint vficon_sync_idle_cb(gpointer data)
{
	ViewFileIcon *vfi = data;

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

	vficon_sync(vfi);
	return FALSE;
}

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

static void vficon_sized_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
{
	ViewFileIcon *vfi = data;

	vficon_populate_at_new_size(vfi, allocation->width, allocation->height, FALSE);
}

/*
 *-----------------------------------------------------------------------------
 * misc
 *-----------------------------------------------------------------------------
 */

void vficon_sort_set(ViewFileIcon *vfi, SortType type, gint ascend)
{
	if (vfi->sort_method == type && vfi->sort_ascend == ascend) return;

	vfi->sort_method = type;
	vfi->sort_ascend = ascend;

	if (!vfi->list) return;

	vfi->list = filelist_sort(vfi->list, vfi->sort_method, vfi->sort_ascend);
	vficon_sync(vfi);
}

/*
 *-----------------------------------------------------------------------------
 * thumb updates
 *-----------------------------------------------------------------------------
 */

static gint vficon_thumb_next(ViewFileIcon *vfi);

static void vficon_thumb_status(ViewFileIcon *vfi, gdouble val, const gchar *text)
{
	if (vfi->func_thumb_status)
		{
		vfi->func_thumb_status(vfi, val, text, vfi->data_thumb_status);
		}
}

static void vficon_thumb_cleanup(ViewFileIcon *vfi)
{
	vficon_thumb_status(vfi, 0.0, NULL);

	g_list_free(vfi->thumbs_list);
	vfi->thumbs_list = NULL;
	vfi->thumbs_count = 0;
	vfi->thumbs_running = FALSE;

	thumb_loader_free(vfi->thumbs_loader);
	vfi->thumbs_loader = NULL;

	vfi->thumbs_fd = NULL;
}

static void vficon_thumb_stop(ViewFileIcon *vfi)
{
	if (vfi->thumbs_running) vficon_thumb_cleanup(vfi);
}

static void vficon_thumb_do(ViewFileIcon *vfi, ThumbLoader *tl, FileData *fd)
{
	GdkPixbuf *pixbuf;

	if (!fd) return;

	pixbuf = thumb_loader_get_pixbuf(tl, TRUE);
	vficon_set_thumb(vfi, fd, pixbuf);
	g_object_unref(pixbuf);

	vficon_thumb_status(vfi, (gdouble)(vfi->thumbs_count) / g_list_length(vfi->list), _("Loading thumbs..."));
}

static void vficon_thumb_error_cb(ThumbLoader *tl, gpointer data)
{
	ViewFileIcon *vfi = data;

	if (vfi->thumbs_fd && vfi->thumbs_loader == tl)
		{
		vficon_thumb_do(vfi, tl, vfi->thumbs_fd);
		}

	while (vficon_thumb_next(vfi));
}

static void vficon_thumb_done_cb(ThumbLoader *tl, gpointer data)
{
	ViewFileIcon *vfi = data;

	if (vfi->thumbs_fd && vfi->thumbs_loader == tl)
		{
		vficon_thumb_do(vfi, tl, vfi->thumbs_fd);
		}

	while (vficon_thumb_next(vfi));
}

static gint vficon_thumb_next(ViewFileIcon *vfi)
{
	GtkTreePath *tpath;
	FileData *fd = NULL;

	if (!GTK_WIDGET_REALIZED(vfi->listview))
		{
		vficon_thumb_status(vfi, 0.0, NULL);
		return FALSE;
		}

	if (gtk_tree_view_get_path_at_pos(GTK_TREE_VIEW(vfi->listview), 0, 0, &tpath, NULL, NULL, NULL))
		{
		GtkTreeModel *store;
		GtkTreeIter iter;
		gint valid = TRUE;

		store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
		gtk_tree_model_get_iter(store, &iter, tpath);
		gtk_tree_path_free(tpath);

		while (!fd && valid && tree_view_row_get_visibility(GTK_TREE_VIEW(vfi->listview), &iter, FALSE) == 0)
			{
			GList *list;

			gtk_tree_model_get(store, &iter, FILE_COLUMN_POINTER, &list, -1);

			while (!fd && list)
				{
				FileData *tfd = list->data;
				if (tfd && !tfd->pixbuf) fd = tfd;
				list = list->next;
				}

			valid = gtk_tree_model_iter_next(store, &iter);
			}
		}

	/* then find first undone */

	if (!fd)
		{
		GList *work = vfi->list;
		while (work && !fd)
			{
			FileData *fd_p = work->data;
			work = work->next;

			if (!fd_p->pixbuf) fd = fd_p;
			}
		}

	if (!fd)
		{
		/* done */
		vficon_thumb_cleanup(vfi);
		return FALSE;
		}

	vfi->thumbs_count++;

	vfi->thumbs_fd = fd;

	thumb_loader_free(vfi->thumbs_loader);

	vfi->thumbs_loader = thumb_loader_new(thumb_max_width, thumb_max_height);
	thumb_loader_set_callbacks(vfi->thumbs_loader,
				   vficon_thumb_done_cb,
				   vficon_thumb_error_cb,
				   NULL,
				   vfi);

	if (!thumb_loader_start(vfi->thumbs_loader, fd->path))
		{
		/* set icon to unknown, continue */
		if (debug) printf("thumb loader start failed %s\n", vfi->thumbs_loader->path);
		vficon_thumb_do(vfi, vfi->thumbs_loader, fd);

		return TRUE;
		}

	return FALSE;
}

static void vficon_thumb_update(ViewFileIcon *vfi)
{
	vficon_thumb_stop(vfi);

	vficon_thumb_status(vfi, 0.0, _("Loading thumbs..."));
	vfi->thumbs_running = TRUE;

	while (vficon_thumb_next(vfi));
}

/*
 *-----------------------------------------------------------------------------
 * row stuff
 *-----------------------------------------------------------------------------
 */

FileData *vficon_index_get_data(ViewFileIcon *vfi, gint row)
{
	return FILE_DATA(g_list_nth_data(vfi->list, row));
}

gchar *vficon_index_get_path(ViewFileIcon *vfi, gint row)
{
	FileData *fd;

	fd = g_list_nth_data(vfi->list, row);

	return (fd ? fd->path : NULL);
}

gint vficon_index_by_path(ViewFileIcon *vfi, const gchar *path)
{
	gint p = 0;
	GList *work;

	if (!path) return -1;

	work = vfi->list;