Method RecalculateVisibleString

src/SFGUI/Entry.cpp:106–144

void Entry::RecalculateVisibleString() const {
	float text_padding( Context::Get().GetEngine().GetProperty<float>( "Padding", shared_from_this() ) );
	const std::string& font_name( Context::Get().GetEngine().GetProperty<std::string>( "FontName", shared_from_this() ) );
	unsigned int font_size( Context::Get().GetEngine().GetProperty<unsigned int>( "FontSize", shared_from_this() ) );
	const sf::Font& font( *Context::Get().GetEngine().GetResourceManager().GetFont( font_name ) );

	if( m_string.isEmpty() ) {
		m_visible_string.clear();
		Invalidate();
		return;
	}

	std::u32string string( m_string.begin(), m_string.end() );
	string.erase( 0, static_cast<std::size_t>( m_visible_offset ) );

	if( m_text_placeholder != 0 ) {
		string.replace( 0, string.size(), string.size(), m_text_placeholder );
	}

	auto length = Context::Get().GetEngine().GetTextStringMetrics( string, font, font_size ).x;

	// While the string is too long for the given space keep chopping off characters
	// on the right end of the string until the cursor is reached, then start
	// chopping off characters on the left side of the string.
	while( !string.empty() && (GetAllocation().size.x - m_text_margin > 0) && (length > GetAllocation().size.x - m_text_margin - (2.f * text_padding)) ) {
		if( ( m_cursor_position - m_visible_offset ) < static_cast<int>( string.size() ) ) {
			string.erase( string.size() - 1, 1 );
		}
		else {
			string.erase( 0, 1 );
			m_visible_offset++;
		}

		length = Context::Get().GetEngine().GetTextStringMetrics( string, font, font_size ).x;
	}

	m_visible_string = string;
	Invalidate();
}

void Entry::MoveCursor( int delta ) {
	if( delta && ( m_cursor_position + delta >= 0 ) && ( m_cursor_position + delta <= static_cast<int>( m_string.getSize() ) ) ) {