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new item::insert to add an item at specified pos

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This commit is contained in:
Jinhao 2017-01-19 06:27:54 +08:00
parent 880a91b717
commit 238e85756f
2 changed files with 37 additions and 6 deletions
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17
include/nana/gui/widgets/menu.hpp
View File

@ -1,7 +1,7 @@
/**
* A Menu implementation
* Nana C++ Library(http://www.nanapro.org)
* Copyright(C) 2009-2016 Jinhao(cnjinhao@hotmail.com)
* Copyright(C) 2009-2017 Jinhao(cnjinhao@hotmail.com)
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
@ -48,6 +48,8 @@ namespace nana
item_proxy& checked(bool);
bool checked() const;
std::string text() const;
std::size_t index() const;
private:
std::size_t index_;
@ -123,8 +125,19 @@ namespace nana
~menu();
/// Appends an item to the menu.
item_proxy append(std::string text_utf8, const event_fn_t& callback= event_fn_t());
item_proxy append(std::string text_utf8, const event_fn_t& handler = {});
void append_splitter();
/// Inserts new item at specified position
/**
* It will invalidate the existing item proxies from the specified position.
* @param pos The position where new item to be inserted
* @param text_utf8 The title of item
* @param handler The event handler for the item.
* @return the item proxy to the new inserted item.
*/
item_proxy insert(std::size_t pos, std::string text_utf8, const event_fn_t& handler = {});
void clear(); ///< Erases all of the items.
/// Closes the menu. It does not destroy the menu; just close the window for the menu.
void close();

26
source/gui/widgets/menu.cpp
View File

@ -1,7 +1,7 @@
/*
* A Menu implementation
* Nana C++ Library(http://www.nanapro.org)
* Copyright(C) 2009-2016 Jinhao(cnjinhao@hotmail.com)
* Copyright(C) 2009-2017 Jinhao(cnjinhao@hotmail.com)
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
@ -86,6 +86,11 @@ namespace nana
return item_.flags.checked;
}
std::string menu_item_type::item_proxy::text() const
{
return item_.text;
}
std::size_t menu_item_type::item_proxy::index() const
{
return index_;
@ -1117,10 +1122,11 @@ namespace nana
delete impl_;
}
auto menu::append(std::string text_utf8, const menu::event_fn_t& callback) -> item_proxy
auto menu::append(std::string text_utf8, const menu::event_fn_t& handler) -> item_proxy
{
impl_->mbuilder.data().items.emplace_back(new item_type(std::move(text_utf8), callback));
return item_proxy(size() - 1, *impl_->mbuilder.data().items.back());
std::unique_ptr<item_type> item{ new item_type{ std::move(text_utf8), handler } };
impl_->mbuilder.data().items.emplace_back(item.get());
return item_proxy(size() - 1, *item.release());
}
void menu::append_splitter()
@ -1128,6 +1134,18 @@ namespace nana
impl_->mbuilder.data().items.emplace_back(new item_type);
}
auto menu::insert(std::size_t pos, std::string text_utf8, const event_fn_t& handler) -> item_proxy
{
auto & items = impl_->mbuilder.data().items;
if (pos > items.size())
throw std::out_of_range("menu: a new item inserted to an invalid position");
std::unique_ptr<item_type> item{ new item_type{ std::move(text_utf8), handler } };
impl_->mbuilder.data().items.emplace(impl_->mbuilder.data().items.cbegin() + pos, item.get());
return item_proxy{ pos, *item.release() };
}
void menu::clear()
{
internal_scope_guard lock;