Исходник How to handle alphabar in supremacy framework

[bossul]

if ( g_input.IsCursorInRect( picker ) && g_input.GetKeyState( VK_LBUTTON ) ) {   
            /* grab the color we want to update to and store it */
            auto color_to_upd = Colorpicker::ColorFromPos( g_input.m_mouse.x - ( px + m_w - COLORPICKER_WIDTH ), g_input.m_mouse.y - ( py + COlORPICKER_HEIGHT + 2 ) );
            
            /* set the color that we stored and update it to main color var, but dont update the color alpha */
            m_color = { color_to_upd.r( ), color_to_upd.g( ), color_to_upd.b( ), m_color.a( ) };

            /* kepp the window prioritized */
            m_parent->m_active_element = this;
        }

        if ( g_input.IsCursorInRect( alpha_bar ) && g_input.GetKeyState( VK_LBUTTON ) ) {
            int input_value = g_input.m_mouse.x - ( m_x + 6 );
            int max_input_range = m_width - 12;
            int mapped_value = static_cast< int >( 255.0f * ( input_value / static_cast< float >( max_input_range ) ) );
            m_color.a( ) = std::max( 0, std::min( 255, mapped_value ) );

            /* clamp this shit since our input system is alchoolic */
            if ( m_color.a() <= 1 ) {
                m_color.a( ) = 0;
            }

            /* clamp this shit since our input system is alchoolic */
            if ( m_color.a() >= 250 ) {
                m_color.a( ) = 255;
            }

            /* kepp the window prioritized */
            m_parent->m_active_element = this;
        }

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