Trendline dlg: Enable widgets only when matching type is selected

Change-Id: Ia232683aafdfe8d2b32be985476cb20702fc807c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111104
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <samuel.mehrbrodt@allotropia.de>
diff --git a/chart2/source/controller/dialogs/res_Trendline.cxx b/chart2/source/controller/dialogs/res_Trendline.cxx
index 6d994e1..e1ccd66 100644
--- a/chart2/source/controller/dialogs/res_Trendline.cxx
+++ b/chart2/source/controller/dialogs/res_Trendline.cxx
@@ -363,6 +363,7 @@ void TrendlineResources::UpdateControlStates()
        m_xNF_Period->set_max(m_nNbPoints - 1);
    }
    bool bMovingAverage = ( m_eTrendLineType == SvxChartRegress::MovingAverage );
    bool bPolynomial = ( m_eTrendLineType == SvxChartRegress::Polynomial );
    bool bInterceptAvailable = ( m_eTrendLineType == SvxChartRegress::Linear )
                            || ( m_eTrendLineType == SvxChartRegress::Polynomial )
                            || ( m_eTrendLineType == SvxChartRegress::Exp );
@@ -378,6 +379,8 @@ void TrendlineResources::UpdateControlStates()
    m_xCB_ShowEquation->set_sensitive( !bMovingAverage );
    m_xCB_ShowCorrelationCoeff->set_sensitive( !bMovingAverage );
    m_xCB_RegressionMovingType->set_sensitive(bMovingAverage);
    m_xNF_Period->set_sensitive(bMovingAverage);
    m_xNF_Degree->set_sensitive(bPolynomial);
    m_xEE_XName->set_sensitive( !bMovingAverage && m_xCB_ShowEquation->get_active() );
    m_xEE_YName->set_sensitive( !bMovingAverage && m_xCB_ShowEquation->get_active() );
}