Function stateViewportRight

src/OpenLoco/src/Input/MouseInput.cpp:550–629

0x004C74BB Right mouse dragging in viewports, such as the main display of the game world.

    // 0x004C74BB
    // Right mouse dragging in viewports, such as the main display of the game world.
    static void stateViewportRight(const MouseButton button, const int32_t x, const int32_t y)
    {
        auto window = WindowManager::find(_dragWindowType, _dragWindowNumber);
        if (window == nullptr)
        {
            Input::state(State::reset);
            return;
        }

        switch (button)
        {

            case MouseButton::released:
            {
                // 4C74E4
                _ticksSinceDragStart += getTimeSinceLastTick();
                auto vp = window->viewports[0];
                if (vp == nullptr)
                {
                    vp = window->viewports[1];
                }
                if (vp == nullptr)
                {
                    Input::state(State::reset);
                    return;
                }

                if (window->hasFlags(WindowFlags::viewportNoScrolling))
                {
                    return;
                }

                Ui::Point dragOffset = { x, y };
                if (Tutorial::state() != Tutorial::State::playing)
                {
                    // Fix #151: use relative drag from one frame to the next rather than
                    //           using the relative position from the message loop
                    dragOffset = getNextDragOffset();
                }
                if (dragOffset.x != 0 || dragOffset.y != 0)
                {
                    _ticksSinceDragStart = 1000;

                    auto* main = WindowManager::getMainWindow();
                    if (Windows::Main::viewportIsFocusedOnAnyEntity(*main))
                    {
                        Windows::Main::viewportUnfocusFromEntity(*main);
                    }
                    else
                    {
                        const auto offsetX = dragOffset.x << (vp->zoom + 1);
                        const auto offsetY = dragOffset.y << (vp->zoom + 1);

                        const auto invert = Config::get().invertRightMouseViewPan ? -1 : 1;

                        window->viewportConfigurations[0].savedViewX += offsetX * invert;
                        window->viewportConfigurations[0].savedViewY += offsetY * invert;
                    }