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add new features to listbox

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a method to enable/disable the number of items
methods about expanding category
methods about category icons
This commit is contained in:
Jinhao
2017-07-22 23:04:43 +08:00
parent 0cfd06b23f
commit a4f7d46eee
2 changed files with 110 additions and 17 deletions
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29
include/nana/gui/widgets/listbox.hpp
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@@ -1052,6 +1052,19 @@ namespace nana
cat_proxy & select(bool);
bool selected() const;
/// Enables/disables the number of items in the category to be displayed behind the category title
cat_proxy& display_number(bool display);
/// Determines whether the category is expanded.
bool expanded() const;
/// Expands/collapses the category
/**
* @param expand Indicates whether to expand or collapse the category. If this parameter is true, it expands the category. If the parameter is false, it collapses the category.
* @return the reference of *this.
*/
cat_proxy& expanded(bool expand);
/// Behavior of a container
void push_back(std::string text_utf8);
@@ -1484,6 +1497,22 @@ the nana::detail::basic_window member pointer scheme
void enable_single(bool for_selection, bool category_limited);
void disable_single(bool for_selection);
export_options& def_export_options();
/// Sets a renderer for category icon
/**
* @param icon_renderer The renderer of category icon
* @return the reference of *this.
*/
listbox& category_icon(std::function<void(paint::graphics& graph, const rectangle& rt_icon, bool expanded)> icon_renderer);
/// Sets category icons
/**
* @param img_expanded An icon displayed in front of category title when the category is expanded.
* @param img_collapsed An icon displayed in front of category title when the category is collapsed.
* @return the reference of *this.
*/
listbox& category_icon(const paint::image& img_expanded, const paint::image&& img_collapsed);
private:
drawerbase::listbox::essence & _m_ess() const;
nana::any* _m_anyobj(size_type cat, size_type index, bool allocate_if_empty) const override;