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new feature "fit_width_to_header caption text" for a new header with width=0

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(cherry picked from commit 23efa5088d742a48e7ad07f273e84bcf50c2d979)
This commit is contained in:
qPCR4vir 2019-09-09 19:53:03 +02:00
parent a1b97e48b5
commit 74f42f1778
1 changed files with 24 additions and 1 deletions
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23
source/gui/widgets/listbox.cpp
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@ -184,7 +184,13 @@ namespace nana
index(pos),
ess_(ess)
{
if (px == 0)
{
fit_width_to_header();
}
}
void fit_width_to_header();
private:
/// The definition is provided after essence
void _m_refresh() noexcept;
@ -2881,6 +2887,23 @@ namespace nana
return max_px;
}
void es_header::column::fit_width_to_header()
{
std::cout<< "Column: " << to_utf8(caption) ;
std::unique_ptr<paint::graphics> graph_helper;
auto graph = ess_->graph;
if (graph->empty())
{
//Creates a helper if widget graph is empty(when its size is 0).
graph_helper.reset(new paint::graphics{ nana::size{ 5, 5 } });
graph_helper->typeface(ess_->graph->typeface());
graph = graph_helper.get();
}
width_px = ess_->scheme_ptr->text_margin * 2; //margin at left/right end.
width_px += graph->text_extent_size(caption).width;
}
//es_header::column member functions
void es_header::column::_m_refresh() noexcept
{