327 lines
7.8 KiB
C++
327 lines
7.8 KiB
C++
/**
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* A group widget implementation
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* Nana C++ Library(http://www.nanaro.org)
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* Copyright(C) 2015-2018 Jinhao(cnjinhao@hotmail.com)
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* @file: nana/gui/widgets/group.cpp
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*
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* @Author: Stefan Pfeifer(st-321), Ariel Vina-Rodriguez (qPCR4vir)
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*
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* @brief group is a widget used to visually group and layout other widgets.
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*
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* @contributor:
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* dankan1890(https://github.com/dankan1890)
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*/
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#include <nana/gui/widgets/group.hpp>
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#include <nana/gui/widgets/label.hpp>
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#include <nana/gui/drawing.hpp>
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#include <nana/gui/widgets/checkbox.hpp>
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#define _THROW_IF_EMPTY()\
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if(empty()) \
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throw std::logic_error("the group is invalid");
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namespace nana{
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static const char* field_title = "__nana_group_title__";
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static const char* field_options = "__nana_group_options__";
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struct group::implement
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{
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label caption;
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align caption_align{ align::left };
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place place_content;
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unsigned gap{2};
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std::string usr_div_str;
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nana::size caption_dimension;
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std::vector<std::unique_ptr<checkbox>> options;
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radio_group * radio_logic{nullptr};
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implement() = default;
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implement(window grp_panel, ::std::string titel, bool vsb, unsigned gap=2)
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: caption (grp_panel, std::move(titel), vsb),
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place_content{grp_panel},
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gap{gap}
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{
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}
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void create(window pnl)
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{
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caption.create(pnl);
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caption.caption("");
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place_content.bind(pnl);
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if (!radio_logic)
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radio_logic = new radio_group;
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}
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void update_div()
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{
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const std::size_t padding = 10;
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caption_dimension = caption.measure(1000);
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caption_dimension.width += 1;
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std::string div = "vert margin=[0," + std::to_string(gap) + "," + std::to_string(gap + 5) + "," + std::to_string(gap) + "]";
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div += "<weight=" + std::to_string(caption_dimension.height) + " ";
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if (align::left == caption_align)
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div += "<weight=" + std::to_string(padding) + ">";
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else
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div += "<>"; //right or center
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div += "<" + std::string{ field_title } + " weight=" + std::to_string(caption_dimension.width) + ">";
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if (align::right == caption_align)
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div += "<weight=" + std::to_string(padding) + ">";
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else if (align::center == caption_align)
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div += "<>";
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div += "><<vert margin=5 " + std::string(field_options) + ">";
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if (!usr_div_str.empty())
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div += "<" + usr_div_str + ">>";
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else
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div += ">";
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place_content.div(div.c_str());
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if (options.empty())
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place_content.field_display(field_options, false);
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if (caption.caption().empty())
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place_content.field_display(field_title, false);
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}
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};
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group::group()
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: impl_(new implement)
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{
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}
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group::group(window parent, const rectangle& r, bool vsb)
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: group()
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{
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create(parent, r, vsb);
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}
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using groupbase_type = widget_object<category::widget_tag, drawerbase::panel::drawer, general_events, drawerbase::group::scheme>;
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group::group(window parent, ::std::string titel, bool formatted, unsigned gap, const rectangle& r, bool vsb)
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: group(parent, r, vsb)
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{
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this->bgcolor(API::bgcolor(parent));
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impl_.reset(new implement(*this, std::move(titel), vsb, gap));
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impl_->caption.format(formatted);
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_m_init();
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}
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group::~group()
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{
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delete impl_->radio_logic;
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}
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checkbox& group::add_option(std::string text)
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{
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_THROW_IF_EMPTY()
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#ifdef _nana_std_has_emplace_return_type
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auto & opt = impl_->options.emplace_back(new checkbox{ handle() });
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#else
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impl_->options.emplace_back(new checkbox(handle()));
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auto & opt = impl_->options.back();
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#endif
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opt->transparent(true);
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opt->caption(std::move(text));
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impl_->place_content[field_options] << *opt;
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impl_->place_content.field_display(field_options, true);
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impl_->place_content.collocate();
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if (impl_->radio_logic)
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impl_->radio_logic->add(*opt);
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return *impl_->options.back();
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}
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void group::caption_align(align position)
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{
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if (position != impl_->caption_align)
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{
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impl_->caption_align = position;
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impl_->update_div();
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impl_->place_content.collocate();
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API::refresh_window(*this);
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}
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}
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group& group::radio_mode(bool enable)
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{
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_THROW_IF_EMPTY()
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if (enable)
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{
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//Create radio_group if it is null
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if (!impl_->radio_logic)
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impl_->radio_logic = new ::nana::radio_group;
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//add all options into the radio_group
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for (auto & opt : impl_->options)
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impl_->radio_logic->add(*opt);
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}
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else
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{
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delete impl_->radio_logic;
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impl_->radio_logic = nullptr;
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}
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return *this;
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}
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std::size_t group::option() const
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{
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_THROW_IF_EMPTY();
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if (impl_->radio_logic)
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return impl_->radio_logic->checked();
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throw std::logic_error("the radio_mode of the group is disabled");
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}
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bool group::option_checked(std::size_t pos) const
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{
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_THROW_IF_EMPTY();
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return impl_->options.at(pos)->checked();
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}
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group& group::enable_format_caption(bool format)
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{
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impl_->caption.format(format);
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return *this;
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}
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group& group::collocate() noexcept
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{
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impl_->place_content.collocate();
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return *this;
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}
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group& group::div(const char* div_str) noexcept
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{
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if (div_str)
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impl_->usr_div_str = div_str;
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else
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impl_->usr_div_str.clear();
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impl_->update_div();
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return *this;
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}
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group::field_reference group::operator[](const char* field)
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{
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return impl_->place_content.field(field);
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}
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void group::field_display(const char* field_name, bool display)
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{
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impl_->place_content.field_display(field_name, display);
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}
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bool group::field_display(const char* field_name) const
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{
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return impl_->place_content.field_display(field_name);
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}
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void group::erase(window handle)
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{
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impl_->place_content.erase(handle);
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}
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void group::_m_add_child(const char* field, widget* wdg)
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{
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impl_->place_content[field] << wdg->handle();
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}
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void group::_m_init()
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{
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this->div(nullptr);
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auto & outter = impl_->place_content;
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outter[field_title] << impl_->caption;
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outter.collocate();
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impl_->caption.transparent(true);
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color pbg = API::bgcolor(this->parent());
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impl_->caption.bgcolor(pbg.blend(colors::black, 0.025));
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this->bgcolor(pbg.blend(colors::black, 0.05));
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drawing dw(*this);
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//When the group is resized, the drawing is called before moving the caption, but
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//the drawing of group requires the lastest position of caption for gradual rectangle.
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//For the requirement, a move event handler is required for listning the change of caption's position.
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impl_->caption.events().move([this](const arg_move&){
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if (align::left != impl_->caption_align)
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API::refresh_window(*this);
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});
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// This drawing function is owner by the onwer of dw (the outer panel of the group widget), not by dw !!
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dw.draw([this](paint::graphics& graph)
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{
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auto gap_px = impl_->gap - 1;
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auto const top_round_line = static_cast<int>(impl_->caption_dimension.height) / 2;
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graph.rectangle(true, API::bgcolor(this->parent()));
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graph.round_rectangle(rectangle(point(gap_px, top_round_line),
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nana::size(graph.width() - 2 * gap_px, graph.height() - top_round_line - gap_px)
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),
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3, 3, this->scheme().border, true, this->bgcolor());
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auto opt_r = API::window_rectangle(impl_->caption);
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if (opt_r)
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{
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rectangle grad_r{ opt_r->position(), nana::size{ opt_r->width + 4, static_cast<unsigned>(top_round_line - opt_r->y) } };
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grad_r.y += top_round_line*2 / 3;
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grad_r.x -= 2;
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graph.gradual_rectangle(grad_r,
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API::bgcolor(this->parent()), this->bgcolor(), true
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);
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}
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});
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}
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void group::_m_complete_creation()
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{
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widget::_m_complete_creation();
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impl_->create(handle());
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_m_init();
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}
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auto group::_m_caption() const noexcept -> native_string_type
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{
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return impl_->caption.caption_native();
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}
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void group::_m_caption(native_string_type&& str)
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{
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impl_->caption.caption(std::move(str));
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impl_->update_div();
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impl_->place_content.collocate();
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}
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}//end namespace nana
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