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listbox auto_width set the column width to fit the current longest text

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This commit is contained in:
qPCR4vir 2015-05-07 22:50:26 +02:00
parent 444449dfaa
commit 371633f23f
2 changed files with 27 additions and 7 deletions
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14
include/nana/gui/widgets/listbox.hpp
View File

@ -367,7 +367,7 @@ namespace nana
}
/// Appends one item at the end of this category with the specifies text in the column fields
void append(std::initializer_list<nana::string>);
void append(std::initializer_list<nana::string>);
size_type columns() const;
@ -559,15 +559,17 @@ By \a clicking on one header the list get \a reordered, first up, and then down
listbox(window, bool visible);
listbox(window, const rectangle& = {}, bool visible = true);
void auto_draw(bool); ///<Set state: Redraw automatically after an operation?
void auto_draw(bool); ///< Set state: Redraw automatically after an operation?
listbox& header_width(size_type pos, unsigned pixels);
unsigned header_width(size_type pos) const;
/// Appends a new column with a header text and the specified width at the end, and return it position
size_type append_header(nana::string header_text, unsigned width = 120);
listbox& header_width(size_type position, unsigned pixels);
unsigned header_width(size_type position) const;
unsigned auto_width(size_type position, unsigned max=3000);
cat_proxy append(nana::string); ///<Appends a new category at the end
void append(std::initializer_list<nana::string>); ///<Appends categories at the end
cat_proxy append(nana::string); ///< Appends a new category at the end
void append(std::initializer_list<nana::string>); ///< Appends categories at the end
cat_proxy insert(cat_proxy, nana::string);
cat_proxy at(size_type pos) const;

20
source/gui/widgets/listbox.cpp
View File

@ -412,7 +412,7 @@ namespace nana
{
m.pixels = width;
return;
}
}
}
unsigned item_width(size_type pos) const
@ -4008,6 +4008,24 @@ namespace nana
ess.update();
return *this;
}
unsigned listbox::auto_width(size_type pos, unsigned max)
{
unsigned max_w{0};
auto & ess = _m_ess();
for (const auto &cat : ess.lister.cat_container())
for (const auto &it : cat.items )
{
if (pos >= it.cells.size()) continue;
// precalcule text geometry
unsigned ts = static_cast<unsigned> ( ess.graph->text_extent_size(it.cells[pos].text).width);
if (max_w < ts)
max_w = ts;
}
if (!max_w) return 0;
header_width(pos, max_w < max ? max_w : max);
ess.update();
return max_w;
}
unsigned listbox::header_width(size_type pos) const
{