CWindowObserver.cpp

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

// Implementation file for CWindowObserver class
#include "graphslam-precomp.h"  // Precompiled headers

#include <mrpt/opengl/COpenGLViewport.h>
#include <mrpt/graphslam/misc/CWindowObserver.h>

using namespace mrpt::graphslam;

CWindowObserver::CWindowObserver() : m_showing_help(false), m_hiding_help(false)
{
        m_help_msg =
                "User options:\n"
                " - h/H: Toggle help message\n"
                " - Alt+Enter: Toggle fullscreen\n"
                " - Mouse click: Set camera manually\n"
                " - Ctrl+c: Halt program execution";

        // register the default keystrokes
        m_key_codes_to_pressed["h"] = false;
        m_key_codes_to_pressed["Alt+Enter"] = false;
        m_key_codes_to_pressed["Ctrl+c"] = false;
        m_key_codes_to_pressed["mouse_clicked"] = false;

        std::cout << "WindowObserver initialized." << std::endl;
}

void CWindowObserver::returnEventsStruct(
        std::map<std::string, bool>* codes_to_pressed,
        bool reset_keypresses /*= true */)
{
        *codes_to_pressed = m_key_codes_to_pressed;

        // reset the code flags
        if (reset_keypresses)
        {
                for (std::map<std::string, bool>::iterator map_it =
                                 m_key_codes_to_pressed.begin();
                         map_it != m_key_codes_to_pressed.end(); ++map_it)
                {
                        map_it->second = false;
                }
        }
}

void CWindowObserver::registerKeystroke(
        const std::string key_str, const std::string key_desc)
{
        m_help_msg += std::string("\n") + " - " + key_str + "/" +
                                  mrpt::system::upperCase(key_str) + ": " + key_desc;

        m_key_codes_to_pressed[key_str] = false;
}

void CWindowObserver::OnEvent(const mrpt::utils::mrptEvent& e)
{
        if (e.isOfType<mrpt::utils::mrptEventOnDestroy>())
        {
                const mrpt::utils::mrptEventOnDestroy& ev =
                        static_cast<const mrpt::utils::mrptEventOnDestroy&>(e);
                MRPT_UNUSED_PARAM(ev);
                std::cout << "Event received: mrptEventOnDestroy" << std::endl;
        }
        else if (e.isOfType<mrpt::gui::mrptEventWindowResize>())
        {
                const mrpt::gui::mrptEventWindowResize& ev =
                        static_cast<const mrpt::gui::mrptEventWindowResize&>(e);
                std::cout << "Resize event received from: " << ev.source_object
                                  << ", new size: " << ev.new_width << " x " << ev.new_height
                                  << std::endl;
        }
        else if (e.isOfType<mrpt::gui::mrptEventWindowChar>())
        {
                const mrpt::gui::mrptEventWindowChar& ev =
                        static_cast<const mrpt::gui::mrptEventWindowChar&>(e);
                std::cout << "Char event received from: " << ev.source_object
                                  << ". Char code: " << ev.char_code
                                  << " modif: " << ev.key_modifiers << std::endl;
                ;

                switch (ev.char_code)
                {
                        case 'h':
                        case 'H':
                                if (!m_showing_help)
                                {
                                        m_showing_help = true;
                                        std::cout << "h/H was pressed!" << std::endl;
                                }
                                else
                                {
                                        m_showing_help = false;
                                        m_hiding_help = true;
                                }
                                m_key_codes_to_pressed["h"] = true;
                                break;
                        case 'c':
                        case 'C':
                                // case 3: // <C-c>
                                if (ev.key_modifiers == 8192)
                                {
                                        std::cout << "Pressed C-c inside CDisplayWindow3D"
                                                          << std::endl;
                                        m_key_codes_to_pressed["Ctrl+c"] = true;
                                }
                                break;

                        default:
                                // just raise the corresponding flag. Let the class which
                                // actually
                                // cares translate the character to its corresponding meaning.
                                // Pressed letter is stored in lower case form only to make it
                                // easier
                                // to check afterwards
                                m_key_codes_to_pressed[mrpt::system::lowerCase(
                                        std::string(1, ev.char_code))] = true;
                                break;
                }

        }  // end of e.isOftype<mrptEventWindowChar>
        else if (e.isOfType<mrpt::gui::mrptEventWindowClosed>())
        {
                const mrpt::gui::mrptEventWindowClosed& ev =
                        static_cast<const mrpt::gui::mrptEventWindowClosed&>(e);
                std::cout << "Window closed event received from: " << ev.source_object
                                  << "\n";
        }
        else if (e.isOfType<mrpt::gui::mrptEventMouseDown>())
        {
                const mrpt::gui::mrptEventMouseDown& ev =
                        static_cast<const mrpt::gui::mrptEventMouseDown&>(e);
                m_key_codes_to_pressed["mouse_clicked"] = true;

                std::cout << "Mouse down event received from: " << ev.source_object
                                  << "pt: " << ev.coords.x << "," << ev.coords.y << "\n";
        }
        else if (e.isOfType<mrpt::opengl::mrptEventGLPostRender>())
        {
                /*
                        * An event sent by an mrpt::opengl::COpenGLViewport AFTER calling
                 * the
                        * SCENE OPENGL DRAWING PRIMITIVES and before doing a glSwapBuffers.
                        */

                // std::cout << "mrpt::opengl::mrpptEventGLPostRender received." <<
                // std::endl;

                mrpt::opengl::gl_utils::renderMessageBox(
                        0.70f, 0.05f,  // x,y (in screen "ratios")
                        0.25f, 0.09f,  // width, height (in screen "ratios")
                        "Press 'h' for help",
                        0.02f  // text size
                        );

                // Also showing help?
                if (m_showing_help || m_hiding_help)
                {
                        // std::cout << "In the m_showing_help ... if-clause" << std::endl;
                        static const double TRANSP_ANIMATION_TIME_SEC = 0.5;

                        const double show_tim = m_tim_show_start.Tac();
                        const double hide_tim = m_tim_show_end.Tac();

                        const double tranparency =
                                m_hiding_help
                                        ? 1.0 - std::min(1.0, hide_tim / TRANSP_ANIMATION_TIME_SEC)
                                        : std::min(1.0, show_tim / TRANSP_ANIMATION_TIME_SEC);

                        mrpt::opengl::gl_utils::renderMessageBox(
                                0.25f, 0.25f,  // x,y (in screen "ratios")
                                0.50f, 0.50f,  // width, height (in screen "ratios")
                                m_help_msg.c_str(),
                                0.02f,  // text size
                                mrpt::utils::TColor(
                                        190, 190, 190, 200 * tranparency),  // background
                                mrpt::utils::TColor(0, 0, 0, 200 * tranparency),  // border
                                mrpt::utils::TColor(200, 0, 0, 150 * tranparency),  // text
                                6.0f,  // border width
                                "serif",  // text font
                                mrpt::opengl::NICE  // text style
                                );

                        if (hide_tim > TRANSP_ANIMATION_TIME_SEC && m_hiding_help)
                        {
                                m_hiding_help = false;
                        }
                }
        }
        else
        {
                // std::cout  << "Unregistered mrptEvent received\n";
        }
}