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add a method to return first node of treebox

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This commit is contained in:
Jinhao 2020-04-21 05:48:07 +08:00
parent e6a75746ad
commit 90789e428c
2 changed files with 8 additions and 0 deletions
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2
include/nana/gui/widgets/treebox.hpp
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@ -515,6 +515,8 @@ namespace nana
*/ */
void use_entire_line(bool enable); void use_entire_line(bool enable);
/// Return the first node of treebox
item_proxy first() const;
private: private:
std::shared_ptr<scroll_operation_interface> _m_scroll_operation() override; std::shared_ptr<scroll_operation_interface> _m_scroll_operation() override;

6
source/gui/widgets/treebox.cpp
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@ -2465,6 +2465,12 @@ namespace nana
dw->impl()->use_entire_line = enable; dw->impl()->use_entire_line = enable;
} }
auto treebox::first() const -> item_proxy
{
auto impl = get_drawer_trigger().impl();
return item_proxy{ const_cast<drawer_trigger_t*>(&get_drawer_trigger()), impl->attr.tree_cont.get_root()->child };
}
std::shared_ptr<scroll_operation_interface> treebox::_m_scroll_operation() std::shared_ptr<scroll_operation_interface> treebox::_m_scroll_operation()
{ {
internal_scope_guard lock; internal_scope_guard lock;