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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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98
source/gui/widgets/listbox.cpp
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@@ -659,7 +659,8 @@ namespace nana
std::unique_ptr<model_interface> model_ptr;
bool expand{true};
bool expand{ true };
bool display_number{ true };
//A cat may have a key object to identify the category
std::shared_ptr<nana::detail::key_interface> key_ptr;
@@ -1938,6 +1939,8 @@ namespace nana
std::unique_ptr<widgets::skeletons::content_view> content_view;
std::function<void(paint::graphics&, const rectangle&, bool)> ctg_icon_renderer; ///< Renderer for the category icon
struct mouse_selection_part
{
bool started{ false };
@@ -3544,27 +3547,36 @@ namespace nana
color txt_color{ static_cast<color_rgb>(0x3399) };
facade<element::arrow> arrow("double");
arrow.direction(categ.expand ? ::nana::direction::north : ::nana::direction::south);
arrow.draw( *graph, {}, txt_color,
{ x + 5, y + static_cast<int>(item_height - 16) / 2, 16, 16 },
element_state::normal);
//Area of category icon
rectangle rt_ctg_icon{ x + 5, y + static_cast<int>(item_height - 16) / 2, 16, 16 };
if (essence_->ctg_icon_renderer)
{
essence_->ctg_icon_renderer(*graph, rt_ctg_icon, categ.expand);
}
else
{
facade<element::arrow> arrow("double");
arrow.direction(categ.expand ? ::nana::direction::south : ::nana::direction::east);
arrow.draw(*graph, {}, txt_color, rt_ctg_icon, element_state::normal);
}
graph->string({ x + 20, y + txtoff }, categ.text, txt_color);
native_string_type str = to_nstring('(' + std::to_string(categ.items.size()) + ')');
auto text_s = graph->text_extent_size(categ.text).width;
auto extend_text_w = text_s + graph->text_extent_size(str).width;
graph->string({ x + 25 + static_cast<int>(text_s), y + txtoff }, str);
if (35 + extend_text_w < width)
auto text_px = graph->text_extent_size(categ.text).width;
if (categ.display_number)
{
::nana::point pos{ x + 30 + static_cast<int>(extend_text_w), y + static_cast<int>(item_height) / 2 };
//Display the number of items in the category
native_string_type str = to_nstring('(' + std::to_string(categ.items.size()) + ')');
graph->string({ x + 25 + static_cast<int>(text_px), y + txtoff }, str);
text_px += graph->text_extent_size(str).width;
}
graph->line(pos, { x + static_cast<int>(width) - 5, pos.y },
txt_color);
if (35 + text_px < width)
{
::nana::point pos{ x + 30 + static_cast<int>(text_px), y + static_cast<int>(item_height) / 2 };
graph->line(pos, { x + static_cast<int>(width) - 5, pos.y }, txt_color);
}
//Draw selecting inner rectangle
@@ -4814,6 +4826,32 @@ namespace nana
return true;
}
cat_proxy& cat_proxy::display_number(bool display)
{
if (cat_->display_number != display)
{
cat_->display_number = display;
ess_->update();
}
return *this;
}
bool cat_proxy::expanded() const
{
return cat_->expand;
}
cat_proxy& cat_proxy::expanded(bool expand)
{
//The first category isn't allowed to be collapsed
if ((expand != cat_->expand) && pos_)
{
cat_->expand = expand;
ess_->update();
}
return *this;
}
auto cat_proxy::columns() const -> size_type
{
return ess_->header.cont().size();
@@ -5585,6 +5623,32 @@ namespace nana
return _m_ess().def_exp_options;
}
listbox& listbox::category_icon(std::function<void(paint::graphics& graph, const rectangle& rt_icon, bool expanded)> icon_renderer)
{
_m_ess().ctg_icon_renderer.swap(icon_renderer);
_m_ess().update();
return *this;
}
listbox& listbox::category_icon(const paint::image& img_expanded, const paint::image&& img_collapsed)
{
_m_ess().ctg_icon_renderer = [img_expanded, img_collapsed](paint::graphics& graph, const rectangle& rt_icon, bool expanded)
{
if (expanded)
{
img_expanded.stretch(rectangle{ img_expanded.size() }, graph, rt_icon);
}
else
{
img_collapsed.stretch(rectangle{ img_collapsed.size() }, graph, rt_icon);
}
};
_m_ess().update();
return *this;
}
drawerbase::listbox::essence & listbox::_m_ess() const
{
return get_drawer_trigger().ess();