append screen source files
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cnjinhao
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include/nana/gui/screen.hpp
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include/nana/gui/screen.hpp
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/*
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* Screen Informations
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* Nana C++ Library(http://www.nanapro.org)
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* Copyright(C) 2003-2015 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/screen.hpp
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*/
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#ifndef NANA_GUI_SCREEN_HPP
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#define NANA_GUI_SCREEN_HPP
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#include "basis.hpp"
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#include <functional>
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#include <memory>
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namespace nana
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{
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/// The monitor display metrics
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class display
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{
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public:
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virtual ~display() = default;
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/// The index of monitor.
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virtual std::size_t index() const = 0;
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/// Returns the positional coordinates and size of the display device in reference to the desktop area
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virtual const ::nana::rectangle& area() const = 0;
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};
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class screen
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{
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public:
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static ::nana::size desktop_size();
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static ::nana::size primary_monitor_size();
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static std::shared_ptr<display> from_point(const point&);
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static std::shared_ptr<display> from_window(window);
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/// Returns the number of display monitors
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std::size_t count() const;
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std::shared_ptr<display> get_display(std::size_t index) const;
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std::shared_ptr<display> get_primary() const;
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void for_each(std::function<void(display&)>) const;
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};
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}//end namespace nana
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#endif
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194
source/gui/screen.cpp
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source/gui/screen.cpp
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/*
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* Screen Informations
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* Nana C++ Library(http://www.nanapro.org)
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* Copyright(C) 2003-2015 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/screen.cpp
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*/
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#include <nana/gui/screen.hpp>
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#include <vector>
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#include <memory>
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#include <nana/gui/detail/native_window_interface.hpp>
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#include <nana/gui/programming_interface.hpp>
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#if defined(NANA_WINDOWS)
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#include <windows.h>
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#endif
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namespace nana
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{
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//class display
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class real_display
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: public display
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{
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public:
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real_display(std::size_t number)
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: index_(number)
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{
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#if defined(NANA_WINDOWS)
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DISPLAY_DEVICE disp;
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disp.cb = sizeof disp;
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if (::EnumDisplayDevices(nullptr, static_cast<DWORD>(index_), &disp, 0))
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{
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DEVMODE mode;
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mode.dmSize = sizeof mode;
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if (::EnumDisplaySettings(disp.DeviceName, ENUM_CURRENT_SETTINGS, &mode))
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{
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area_.x = mode.dmPosition.x;
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area_.y = mode.dmPosition.y;
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area_.width = mode.dmPelsWidth;
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area_.height = mode.dmPelsHeight;
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return;
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}
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}
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#else
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if (0 == index_)
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{
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position_.x = position_.y = 0;
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size_ = detail::native_interface::primary_monitor_size();
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return;
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}
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#endif
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throw std::invalid_argument("Nana.Screen: Invalid monitor index.");
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}
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real_display(std::size_t number, const ::nana::rectangle& r)
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: index_(number), area_(r)
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{
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}
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public:
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//Implementation of display
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std::size_t index() const override
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{
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return index_;
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}
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const ::nana::rectangle& area() const override
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{
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return area_;
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}
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private:
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const std::size_t index_;
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::nana::rectangle area_;
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};
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//class screen
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::nana::size screen::desktop_size()
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{
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#if defined(NANA_WINDOWS)
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auto w = static_cast<size::value_type>(::GetSystemMetrics(SM_CXVIRTUALSCREEN));
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auto h = static_cast<size::value_type>(::GetSystemMetrics(SM_CYVIRTUALSCREEN));
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return{w, h};
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#else
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return ::nana::detail::native_interface::primary_monitor_size();
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#endif
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}
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::nana::size screen::primary_monitor_size()
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{
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return ::nana::detail::native_interface::primary_monitor_size();
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}
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std::shared_ptr<display> screen::from_point(const point& pos)
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{
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#if defined(NANA_WINDOWS)
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typedef HMONITOR(__stdcall * MonitorFromPointT)(POINT, DWORD);
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MonitorFromPointT mfp = reinterpret_cast<MonitorFromPointT>(::GetProcAddress(::GetModuleHandleA("User32.DLL"), "MonitorFromPoint"));
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if (mfp)
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{
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POINT native_pos = { pos.x, pos.y };
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HMONITOR monitor = mfp(native_pos, 2 /*MONITOR_DEFAULTTONEAREST*/);
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MONITORINFO mi;
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mi.cbSize = sizeof mi;
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if (::GetMonitorInfo(monitor, &mi))
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{
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DISPLAY_DEVICE disp;
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disp.cb = sizeof disp;
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DWORD index = 0;
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while (::EnumDisplayDevices(nullptr, index++, &disp, 0))
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{
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DEVMODE mode;
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mode.dmSize = sizeof mode;
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if (::EnumDisplaySettings(disp.DeviceName, ENUM_CURRENT_SETTINGS, &mode))
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{
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if (mode.dmPosition.x == mi.rcWork.left && mode.dmPosition.y == mi.rcWork.top &&
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(mode.dmPelsWidth == mi.rcWork.right - mi.rcWork.left) &&
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(mode.dmPelsHeight == mi.rcWork.bottom - mi.rcWork.top))
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{
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return std::make_shared<real_display>(static_cast<std::size_t>(index - 1), rectangle{ mode.dmPosition.x, mode.dmPosition.y, static_cast<unsigned>(mode.dmPelsWidth), static_cast<unsigned>(mode.dmPelsHeight) });
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}
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}
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}
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}
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}
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#endif
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return screen().get_primary();
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}
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std::shared_ptr<display> screen::from_window(window wd)
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{
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::nana::point pos;
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API::calc_screen_point(wd, pos);
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return from_point(pos);
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}
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std::size_t screen::count() const
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{
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#if defined(NANA_WINDOWS)
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DISPLAY_DEVICE disp;
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disp.cb = sizeof disp;
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DWORD index = 0;
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while (::EnumDisplayDevices(nullptr, index++, &disp, 0));
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return static_cast<std::size_t>(index - 1);
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#else
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return 1;
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#endif
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}
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std::shared_ptr<display> screen::get_display(std::size_t index) const
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{
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return std::make_shared<real_display>(index);
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}
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std::shared_ptr<display> screen::get_primary() const
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{
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#if defined(NANA_WINDOWS)
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//return rectangle(mi.rcWork.left, mi.rcWork.top,
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// mi.rcWork.right - mi.rcWork.left, mi.rcWork.bottom - mi.rcWork.top);
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DISPLAY_DEVICE disp;
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disp.cb = sizeof disp;
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DWORD index = 0;
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while (::EnumDisplayDevices(nullptr, index++, &disp, 0))
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{
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DEVMODE mode;
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mode.dmSize = sizeof mode;
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if (::EnumDisplaySettings(disp.DeviceName, ENUM_CURRENT_SETTINGS, &mode))
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{
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if (mode.dmPosition.x == 0 && mode.dmPosition.y == 0)
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return std::make_shared<real_display>(static_cast<std::size_t>(index - 1), rectangle{ mode.dmPosition.x, mode.dmPosition.y, static_cast<unsigned>(mode.dmPelsWidth), static_cast<unsigned>(mode.dmPelsHeight) });
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}
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}
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#endif
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return std::make_shared<real_display>(0);
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}
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void screen::for_each(std::function<void(display&)> fn) const
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{
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auto n = count();
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for (decltype(n) i = 0; i < n; ++i)
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{
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real_display disp(i);
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fn(disp);
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}
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}
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//end class screen
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}
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