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| − | =tree_proc to-do=
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| − | tree_proc(id_tree, id_action, item, index, text, icon)
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| − | Controls treeview-control.
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| − | * Param id_tree is int handle of treeview.
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| − | * Param item is handle of treeview item. Can be 0 for invisible root-item, e.g. you can clear tree using root-item.
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| − | Possible values of id_action:
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| − | * TREE_ITEM_ENUM: Gets list of subitems of item, or None. Param item. Gets list of 2-tuples: (int_handle, str_caption).
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| − | * TREE_ITEM_ADD: Adds subitem as item's child. Param item. Param index: at which subitem index to insert (0..child_count-1), or -1 to append. Param text: caption of item. Param icon: index in imagelist or -1.
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| − | * TREE_ITEM_DELETE: Deletes item (with all subitems). Param item.
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| − | * TREE_ITEM_SET_NAME: Sets new item name. Params: item, text.
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| − | * TREE_ITEM_SET_ICON: Sets new item icon. Params: item, icon: index in imagelist.
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| − | * TREE_ICON_ADD: Adds icon to imagelist. Param text: path to png file. Gets imagelist index of new icon.
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| − | * TREE_ICON_DELETE: Deletes icon from imagelist (note: icons after this imagelist index will shift, will have new imagelist index). Param icon: index in imagelist (0..count-1). Gets bool: index existed before.
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