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listbox::hovered now returns absolute position

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fix related issue #528
This commit is contained in:
Jinhao 2020-03-27 07:28:48 +08:00
parent c9b9451443
commit 419d615505
2 changed files with 24 additions and 4 deletions
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12
include/nana/gui/widgets/listbox.hpp
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@ -1,7 +1,7 @@
/**
* A List Box Implementation
* Nana C++ Library(http://www.nanapro.org)
* Copyright(C) 2003-2019 Jinhao(cnjinhao@hotmail.com)
* Copyright(C) 2003-2020 Jinhao(cnjinhao@hotmail.com)
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
@ -1511,8 +1511,18 @@ the nana::detail::basic_window member pointer scheme
/// Returns the index pair of the item which contains the specified "screen" point.
index_pair cast(const point & screen_pos) const;
/// Converts the index between absolute position and display position
/**
* @param idx The index to be converted
* @param from_display_order If this parameter is true, the method converts a display position to an absolute position.
* If the parameter is false, the method converts an absolute position to a display position.
* @return a display position or an absolute position that are depending on from_display_order.
*/
index_pair index_cast(index_pair idx, bool from_display_order) const;
/// Returns the item which is hovered
/**
* The item position is an absolute position.
* @param return_end Indicates whether to return an end position instead of an empty position if no item is hovered.
* @return The position of the hovered item. If return_end is true and no item is hovered it returns the position next to the last item of last category.
*/

16
source/gui/widgets/listbox.cpp
View File

@ -1,7 +1,7 @@
/*
* A List Box Implementation
* Nana C++ Library(http://www.nanapro.org)
* Copyright(C) 2003-2019 Jinhao(cnjinhao@hotmail.com)
* Copyright(C) 2003-2020 Jinhao(cnjinhao@hotmail.com)
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
@ -5736,6 +5736,14 @@ namespace nana
return index_pair{ npos, npos };
}
listbox::index_pair listbox::index_cast(index_pair idx, bool from_display_order) const
{
internal_scope_guard lock;
idx.item = at(idx.cat).index_cast(idx.item, from_display_order);
return idx;
}
listbox::index_pair listbox::hovered(bool return_end) const
{
using parts = drawerbase::listbox::essence::parts;
@ -5755,9 +5763,11 @@ namespace nana
if (0 < pos.cat)
--pos.cat;
pos.item = this->size_item(pos.cat);
}
return pos;
return pos;
}
return index_cast(pos, true);
}
else if (return_end)
return index_pair{ this->size_categ() - 1, this->size_item(this->size_categ() - 1) };