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。

	ViewFileIcon *vfi = data;

	vficon_selection_remove(vfi, vfi->click_fd, SELECTION_PRELIGHT, NULL);

	if (context->action == GDK_ACTION_MOVE)
		{
		vficon_refresh(vfi);
		}

	tip_unschedule(vfi);
}

static void vficon_dnd_init(ViewFileIcon *vfi)
{
	gtk_drag_source_set(vfi->listview, GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
			    dnd_file_drag_types, dnd_file_drag_types_count,
			    GDK_ACTION_COPY | GDK_ACTION_MOVE | GDK_ACTION_LINK);
	g_signal_connect(G_OBJECT(vfi->listview), "drag_data_get",
			 G_CALLBACK(vficon_dnd_get), vfi);
	g_signal_connect(G_OBJECT(vfi->listview), "drag_begin",
			 G_CALLBACK(vficon_dnd_begin), vfi);
	g_signal_connect(G_OBJECT(vfi->listview), "drag_end",
			 G_CALLBACK(vficon_dnd_end), vfi);
}

/*
 *-------------------------------------------------------------------
 * cell updates
 *-------------------------------------------------------------------
 */

static void vficon_selection_set(ViewFileIcon *vfi, FileData *fd, SelectionType value, GtkTreeIter *iter)
{
	IconData *id;
	GtkTreeModel *store;
	GList *list;

	if (!fd) return;

	id = ICON_DATA(fd);

	if (id->selected == value) return;
	id->selected = value;

	store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
	if (iter)
		{
		gtk_tree_model_get(store, iter, FILE_COLUMN_POINTER, &list, -1);
		if (list) gtk_list_store_set(GTK_LIST_STORE(store), iter, FILE_COLUMN_POINTER, list, -1);
		}
	else
		{
		GtkTreeIter row;

		if (vficon_find_iter(vfi, fd, &row, NULL))
			{
			gtk_tree_model_get(store, &row, FILE_COLUMN_POINTER, &list, -1);
			if (list) gtk_list_store_set(GTK_LIST_STORE(store), &row, FILE_COLUMN_POINTER, list, -1);
			}
		}
}

static void vficon_selection_add(ViewFileIcon *vfi, FileData *fd, SelectionType mask, GtkTreeIter *iter)
{
	if (!fd) return;

	vficon_selection_set(vfi, fd, ICON_DATA(fd)->selected | mask, iter);
}

static void vficon_selection_remove(ViewFileIcon *vfi, FileData *fd, SelectionType mask, GtkTreeIter *iter)
{
	if (!fd) return;

	vficon_selection_set(vfi, fd, ICON_DATA(fd)->selected & ~mask, iter);
}

/*
 *-------------------------------------------------------------------
 * selections
 *-------------------------------------------------------------------
 */

static void vficon_verify_selections(ViewFileIcon *vfi)
{
	GList *work;

	work = vfi->selection;
	while (work)
		{
		FileData *fd = work->data;
		work = work->next;
		if (!g_list_find(vfi->list, fd))
			{
			vfi->selection = g_list_remove(vfi->selection, fd);
			}
		}
}

void vficon_select_all(ViewFileIcon *vfi)
{
	GList *work;

	g_list_free(vfi->selection);
	vfi->selection = NULL;

	work = vfi->list;
	while (work)
		{
		vfi->selection = g_list_append(vfi->selection, work->data);
		vficon_selection_add(vfi, work->data, SELECTION_SELECTED, NULL);
		work = work->next;
		}

	vficon_send_update(vfi);
}

void vficon_select_none(ViewFileIcon *vfi)
{
	GList *work;

	work = vfi->selection;
	while (work)
		{
		vficon_selection_remove(vfi, work->data, SELECTION_SELECTED, NULL);
		work = work->next;
		}

	g_list_free(vfi->selection);
	vfi->selection = NULL;

	vficon_send_update(vfi);
}

static void vficon_select(ViewFileIcon *vfi, FileData *fd)
{
	vfi->prev_selection = fd;

	if (!fd || ICON_DATA(fd)->selected & SELECTION_SELECTED) return;

	vfi->selection = g_list_append(vfi->selection, fd);
	vficon_selection_add(vfi, fd, SELECTION_SELECTED, NULL);

	vficon_send_update(vfi);
}

static void vficon_unselect(ViewFileIcon *vfi, FileData *fd)
{
	vfi->prev_selection = fd;

	if (!fd || !(ICON_DATA(fd)->selected & SELECTION_SELECTED) ) return;

	vfi->selection = g_list_remove(vfi->selection, fd);
	vficon_selection_remove(vfi, fd, SELECTION_SELECTED, NULL);

	vficon_send_update(vfi);
}

static void vficon_select_util(ViewFileIcon *vfi, FileData *fd, gint select)
{
	if (select)
		{
		vficon_select(vfi, fd);
		}
	else
		{
		vficon_unselect(vfi, fd);
		}
}

static void vficon_select_region_util(ViewFileIcon *vfi, FileData *start, FileData *end, gint select)
{
	gint row1, col1;
	gint row2, col2;
	gint t;
	gint i, j;

	if (!vficon_find_position(vfi, start, &row1, &col1) ||
	    !vficon_find_position(vfi, end, &row2, &col2) ) return;

	vfi->prev_selection = end;

	if (!collection_rectangular_selection)
		{
		GList *work;
		FileData *fd;

		if (g_list_index(vfi->list, start) > g_list_index(vfi->list, end))
			{
			fd = start;
			start = end;
			end = fd;
			}

		work = g_list_find(vfi->list, start);
		while (work)
			{
			fd = work->data;
			vficon_select_util(vfi, fd, select);
			
			if (work->data != end)
				work = work->next;
			else
				work = NULL;
			}
		return;
		}

	if (row2 < row1)
		{
		t = row1;
		row1 = row2;
		row2 = t;
		}
	if (col2 < col1)
		{
		t = col1;
		col1 = col2;
		col2 = t;
		}

	if (debug) printf("table: %d x %d to %d x %d\n", row1, col1, row2, col2);

	for (i = row1; i <= row2; i++)
		{
		for (j = col1; j <= col2; j++)
			{
			FileData *fd = vficon_find_data(vfi, i, j, NULL);
			if (fd) vficon_select_util(vfi, fd, select);
			}
		}
}

gint vficon_index_is_selected(ViewFileIcon *vfi, gint row)
{
	FileData *fd = g_list_nth_data(vfi->list, row);

	if (!fd) return FALSE;

	return (ICON_DATA(fd)->selected & SELECTION_SELECTED);
}

gint vficon_selection_count(ViewFileIcon *vfi, gint64 *bytes)
{
	if (bytes)
		{
		gint64 b = 0;
		GList *work;

		work = vfi->selection;
		while (work)
			{
			FileData *fd = work->data;
			b += fd->size;

			work = work->next;
			}

		*bytes = b;
		}

	return g_list_length(vfi->selection);
}

GList *vficon_selection_get_list(ViewFileIcon *vfi)
{
	GList *list = NULL;
	GList *work;

	work = vfi->selection;
	while (work)
		{
		FileData *fd = work->data;

		list = g_list_prepend(list, g_strdup(fd->path));

		work = work->next;
		}

	list = g_list_reverse(list);

	return list;
}

GList *vficon_selection_get_list_by_index(ViewFileIcon *vfi)
{
	GList *list = NULL;
	GList *work;

	work = vfi->selection;	
	while (work)
		{
		list = g_list_prepend(list, GINT_TO_POINTER(g_list_index(vfi->list, work->data)));
		work = work->next;
		}

	return g_list_reverse(list);
}

void vficon_select_by_path(ViewFileIcon *vfi, const gchar *path)
{
	FileData *fd;
	GList *work;

	if (!path) return;

	fd = NULL;
	work = vfi->list;
	while (work && !fd)
		{
		FileData *chk = work->data;
		work = work->next;
		if (strcmp(chk->path, path) == 0) fd = chk;
		}

	if (!fd) return;

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

	vficon_set_focus(vfi, fd);
}

/*
 *-------------------------------------------------------------------
 * focus
 *-------------------------------------------------------------------
 */

static void vficon_move_focus(ViewFileIcon *vfi, gint row, gint col, gint relative)
{
	gint new_row;
	gint new_col;

	if (relative)
		{
		new_row = vfi->focus_row;
		new_col = vfi->focus_column;

		new_row += row;
		if (new_row < 0) new_row = 0;
		if (new_row >= vfi->rows) new_row = vfi->rows - 1;

		while(col != 0)
			{
			if (col < 0)
				{
				new_col--;
				col++;
				}
			else
				{
				new_col++;
				col--;
				}

			if (new_col < 0)
				{
				if (new_row > 0)
					{
					new_row--;
					new_col = vfi->columns - 1;
					}
				else
					{
					new_col = 0;
					}
				}
			if (new_col >= vfi->columns)
				{
				if (new_row < vfi->rows - 1)
					{
					new_row++;
					new_col = 0;
					}
				else
					{
					new_col = vfi->columns - 1;
					}
				}
			}
		}
	else
		{
		new_row = row;
		new_col = col;

		if (new_row >= vfi->rows)
			{
			if (vfi->rows > 0)
				new_row = vfi->rows - 1;
			else
				new_row = 0;
			new_col = vfi->columns - 1;
			}
		if (new_col >= vfi->columns) new_col = vfi->columns - 1;
		}

	if (new_row == vfi->rows - 1)
		{
		gint l;

		/* if we moved beyond the last image, go to the last image */

		l = g_list_length(vfi->list);
		if (vfi->rows > 1) l -= (vfi->rows - 1) * vfi->columns;
		if (new_col >= l) new_col = l - 1;
		}

	vficon_set_focus(vfi, vficon_find_data(vfi, new_row, new_col, NULL));
}

static void vficon_set_focus(ViewFileIcon *vfi, FileData *fd)
{
	GtkTreeIter iter;
	gint row, col;

	if (g_list_find(vfi->list, vfi->focus_fd))
		{
		if (fd == vfi->focus_fd)
			{
			/* ensure focus row col are correct */
			vficon_find_position(vfi, vfi->focus_fd, &vfi->focus_row, &vfi->focus_column);
			return;
			}
		vficon_selection_remove(vfi, vfi->focus_fd, SELECTION_FOCUS, NULL);
		}

	if (!vficon_find_position(vfi, fd, &row, &col))
		{
		vfi->focus_fd = NULL;
		vfi->focus_row = -1;
		vfi->focus_column = -1;
		return;
		}

	vfi->focus_fd = fd;
	vfi->focus_row = row;
	vfi->focus_column = col;
	vficon_selection_add(vfi, vfi->focus_fd, SELECTION_FOCUS, NULL);

	if (vficon_find_iter(vfi, vfi->focus_fd, &iter, NULL))
		{
		GtkTreePath *tpath;
		GtkTreeViewColumn *column;
		GtkTreeModel *store;

		tree_view_row_make_visible(GTK_TREE_VIEW(vfi->listview), &iter, FALSE);

		store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
		tpath = gtk_tree_model_get_path(store, &iter);
		/* focus is set to an extra column with 0 width to hide focus, we draw it ourself */
		column = gtk_tree_view_get_column(GTK_TREE_VIEW(vfi->listview), VFICON_MAX_COLUMNS);
		gtk_tree_view_set_cursor(GTK_TREE_VIEW(vfi->listview), tpath, column, FALSE);
		gtk_tree_path_free(tpath);
		}
}

static void vficon_update_focus(ViewFileIcon *vfi)
{
	gint new_row = 0;
	gint new_col = 0;

	if (vfi->focus_fd && vficon_find_position(vfi, vfi->focus_fd, &new_row, &new_col))
		{
		/* first find the old focus, if it exists and is valid */
		}
	else
		{
		/* (try to) stay where we were */
		new_row = vfi->focus_row;
		new_col = vfi->focus_column;
		}

	vficon_move_focus(vfi, new_row, new_col, FALSE);
}

/* used to figure the page up/down distances */
static gint page_height(ViewFileIcon *vfi)
{
	GtkAdjustment *adj;
	gint page_size;
	gint row_height;
	gint ret;

	adj = gtk_tree_view_get_vadjustment(GTK_TREE_VIEW(vfi->listview));
	page_size = (gint)adj->page_increment;

	row_height = thumb_max_height + THUMB_BORDER_PADDING * 2;
	if (vfi->show_text) row_height += thumb_max_height / 3;

	ret = page_size / row_height;
	if (ret < 1) ret = 1;

	return ret;
}

/*
 *-------------------------------------------------------------------
 * keyboard
 *-------------------------------------------------------------------
 */

static void vfi_menu_position_cb(GtkMenu *menu, gint *x, gint *y, gboolean *push_in, gpointer data)
{
	ViewFileIcon *vfi = data;
	GtkTreeModel *store;
	GtkTreeIter iter;
	gint column;
	GtkTreePath *tpath;
	gint cw, ch;

	if (!vficon_find_iter(vfi, vfi->click_fd, &iter, &column)) return;
	store = gtk_tree_view_get_model(GTK_TREE_VIEW(vfi->listview));
	tpath = gtk_tree_model_get_path(store, &iter);
	tree_view_get_cell_clamped(GTK_TREE_VIEW(vfi->listview), tpath, column, FALSE, x, y, &cw, &ch);
	gtk_tree_path_free(tpath);
	*y += ch;
	popup_menu_position_clamp(menu, x, y, 0);
}

static gint vficon_press_key_cb(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
	ViewFileIcon *vfi = data;
	gint stop_signal = FALSE;
	gint focus_row = 0;
	gint focus_col = 0;
	FileData *fd;

	switch (event->keyval)
		{
		case GDK_Left: case GDK_KP_Left:
			focus_col = -1;
			stop_signal = TRUE;
			break;
		case GDK_Right: case GDK_KP_Right:
			focus_col = 1;
			stop_signal = TRUE;
			break;
		case GDK_Up: case GDK_KP_Up:
			focus_row = -1;
			stop_signal = TRUE;
			break;
		case GDK_Down: case GDK_KP_Down:
			focus_row = 1;
			stop_signal = TRUE;
			break;
		case GDK_Page_Up: case GDK_KP_Page_Up:
			focus_row = -page_height(vfi);
			stop_signal = TRUE;
			break;
		case GDK_Page_Down: case GDK_KP_Page_Down:
			focus_row = page_height(vfi);
			stop_signal = TRUE;
			break;
		case GDK_Home: case GDK_KP_Home:
			focus_row = -vfi->focus_row;
			focus_col = -vfi->focus_column;
			stop_signal = TRUE;
			break;
		case GDK_End: case GDK_KP_End:
			focus_row = vfi->rows - 1 - vfi->focus_row;
			focus_col = vfi->columns - 1 - vfi->focus_column;
			stop_signal = TRUE;
			break;
		case GDK_space:
			fd = vficon_find_data(vfi, vfi->focus_row, vfi->focus_column, NULL);
			if (fd)
				{
				vfi->click_fd = fd;
				if (event->state & GDK_CONTROL_MASK)
					{
					gint selected;

					selected = ICON_DATA(fd)->selected & SELECTION_SELECTED;
					if (selected)
						{
						vficon_unselect(vfi, fd);
						}
					else
						{
						vficon_select(vfi, fd);
						vficon_send_layout_select(vfi, fd);
						}
					}
				else
					{
					vficon_select_none(vfi);
					vficon_select(vfi, fd);
					vficon_send_layout_select(vfi, fd);
					}
				}
			stop_signal = TRUE;
			break;
		case GDK_Menu:
			fd = vficon_find_data(vfi, vfi->focus_row, vfi->focus_column, NULL);
			vfi->click_fd = fd;

			vficon_selection_add(vfi, vfi->click_fd, SELECTION_PRELIGHT, NULL);
			tip_unschedule(vfi);

			vfi->popup = vficon_pop_menu(vfi, (fd != NULL));
			gtk_menu_popup(GTK_MENU(vfi->popup), NULL, NULL, vfi_menu_position_cb, vfi, 0, GDK_CURRENT_TIME);
			stop_signal = TRUE;
			break;
		default:
			break;
		}

	if (focus_row != 0 || focus_col != 0)
		{
		FileData *new_fd;
		FileData *old_fd;

		old_fd = vficon_find_data(vfi, vfi->focus_row, vfi->focus_column, NULL);
		vficon_move_focus(vfi, focus_row, focus_col, TRUE);
		new_fd = vficon_find_data(vfi, vfi->focus_row, vfi->focus_column, NULL);

		if (new_fd != old_fd)
			{
			if (event->state & GDK_SHIFT_MASK)
				{
				if (!collection_rectangular_selection)
					{
					vficon_select_region_util(vfi, old_fd, new_fd, FALSE);
					}
				else
					{
					vficon_select_region_util(vfi, vfi->click_fd, old_fd, FALSE);
					}
				vficon_select_region_util(vfi, vfi->click_fd, new_fd, TRUE);
				vficon_send_layout_select(vfi, new_fd);
				}
			else if (event->state & GDK_CONTROL_MASK)
				{
				vfi->click_fd = new_fd;
				}
			else