assign method
Implementation
void assign(TGridColumnTitle source) {
_caption = source._caption;
_color = source._color;
_alignment = source._alignment;
_layout = source._layout;
_font.assign(source._font);
_isDefaultTitleFont = source._isDefaultTitleFont;
imageIndex = source.imageIndex;
imageLayout = source.imageLayout;
prefixOption = source.prefixOption;
multiLine = source.multiLine;
_isDefaultCaption = source._isDefaultCaption;
_column.columnChanged();
}