tooltip.cpp

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/*
    Copyright (C) 2011 - 2022
    by Mark de Wever <koraq@xs4all.nl>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY.

    See the COPYING file for more details.
*/

#define GETTEXT_DOMAIN "wesnoth-lib"

#include "gui/dialogs/tooltip.hpp"

#include "gui/auxiliary/find_widget.hpp"
#include "gui/core/gui_definition.hpp"
#include "gui/dialogs/modal_dialog.hpp"
#include "gui/dialogs/modeless_dialog.hpp"
#include "gui/widgets/settings.hpp"
#include "gui/widgets/window.hpp"

static lg::log_domain log_config("config");
#define ERR_CFG LOG_STREAM(warn, log_config)

namespace gui2::dialogs
{

REGISTER_WINDOW(tooltip_large)

/**
 * @ingroup GUIWindowDefinitionWML
 *
 * Class to show the tips.
 *
 * At the moment two kinds of tips are known:
 * * tooltip
 * * helptip
 *
 * Generic window to show a floating tip window.
 * The class has several subclasses using the same format.
 * For example there will be tooltips and helptips, both using this class.
 * Key               |Type          |Mandatory|Description
 * ------------------|--------------|---------|-----------
 * label             | control      |yes      |This text contains the message to show in the tip.
 *
 * In the canvas of the windows used in this dialog the following variables are defined:
 * Variable          |Type                               |Description
 * ------------------|-----------------------------------|-----------
 * mouse_x           | @ref guivartype_string "unsigned" |The x coordinate of the mouse pointer when the window was created.
 * mouse_y           | @ref guivartype_string "unsigned" |The y coordinate of the mouse pointer when the window was created.
 */
class tooltip : public modeless_dialog
{
public:
    tooltip(const std::string& window_id, const t_string& message,
            const point& mouse, const SDL_Rect& source_rect)
        : modeless_dialog(window_id)
    {
        find_widget<styled_widget>(this, "label", false).set_label(message);

        set_variable("mouse_x", wfl::variant(mouse.x));
        set_variable("mouse_y", wfl::variant(mouse.y));

        set_variable("source_x", wfl::variant(source_rect.x));
        set_variable("source_y", wfl::variant(source_rect.y));
        set_variable("source_w", wfl::variant(source_rect.w));
        set_variable("source_h", wfl::variant(source_rect.h));
    }
};

namespace tip
{

static std::unique_ptr<tooltip> tip;

void show(const std::string& window_id,
          const t_string& message,
          const point& mouse,
          const SDL_Rect& source_rect)
{
    /*
     * For now allow invalid tip names, might turn them to invalid wml messages
     * later on.
     */
    tip.reset(new tooltip(window_id, message, mouse, source_rect));
    try
    {
        tip->show();
    }
    catch(const window_builder_invalid_id&)
    {
        ERR_CFG << "Tip with the requested id '" << window_id
                << "' doesn't exist, fall back to the default.";
        tip.reset(new tooltip("tooltip_large", message, mouse, source_rect));
        try
        {
            tip->show();
        }
        catch(const window_builder_invalid_id&)
        {
            ERR_CFG << "Default tooltip doesn't exist, no message shown.";
        }
    }
}

void remove()
{
    tip.reset();
}

} // namespace tip

} // namespace dialogs