tree-visitor is similar to the tree-edit function previously discussed.

tree-visitor 类似于前文所述的 tree-edit 函数。

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The tree-edit function takes a zipper structure, a matcher function, and an editor function.

tree - edit函数获取一个zipper结构、一个matcher函数和一个editor函数。

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The toolbar widget then automatically switches the My_ToolbarAction widget's mode to edit mode and calls its onedit function.

工具栏小部件然后会自动将 My_ToolbarAction 小部件切换到编辑模式并调用其 Onedit 函数。

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The QuickFit Virtual Scale function to provide actual sized document, photo and alignment grid overlays onscreen so users can accurately preview and edit their photos on screen.

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