tailieunhanh - Graphical user interfaces for Python programs Phần 8

Thêm newtag mục gần nhất với điểm cho trước x và y. Nếu có nhiều hơn một mục ở khoảng cách gần nhất (có nghĩa là hai mục chồng chéo điểm), sau đó hàng đầu của các mặt hàng này (mới nhất trong danh sách hiển thị) được sử dụng. | addtagclosest newtag x y halo None start None Adds newtag to the item closest to the point given by x andy. If more than one item is at the same closest distance meaning two items overlap the point then the top-most of these items the last one in the display list is used. If halo is specified then it must be a non-negative value. Any item closer than halo to the point is considered to overlap it. The start argument may be used to step circularly through all the closest items. If start is specified it names an item using a tag or id if by tag it selects the first item in the display list with the given tag . Instead of selecting the top-most closest item this form will select the top-most closest item that is below start in the display list if no such item exists then the selection behaves as if the start argument had not been specified. addtag_enclosed newtag x1 y1 x2 y2 Adds newtag to all the items completely enclosed within the rectangular region given by x1 y1 x2 and y2. x1 must be no greater than x2 and y1 must be no greater than y2. addtag_overlapping newtag x1 y1 x2 y2 Adds newtag to all the items that overlap or are enclosed within the rectangular region given by x1 y1 x2 and y2. x1 must be no greater than x2 and y1 must be no greater than y2. addtag_withtag newtag tagOrId Adds newtag to all the items given by tagOrld. bbox tagOrId bbox Returns a tuple with four elements giving an approximate bounding box for all the items named by the tagOrld arguments. The tuple is in the order x1 y1 x2 y2 such that the drawn areas of all the named elements are within the region bounded by x1 on the left x2 on the right y1 on the top and y2 on the bottom. The return value may overestimate the actual bounding box by a few pixels. If no items match any of the tagOrld arguments or if the matching items have empty bounding boxes . they have nothing to display then an empty string is returned. canvasx screenx gridspacing None Given a window x-coordinate in the canvas screenx