Method UpdateMultilineWidgetSize

src/widget.cpp:1114–1125

* Try to set optimum widget size for a multiline text widget. * The window will need to be reinited if the size is changed. * @param str Multiline string contents that will fill the widget. * @param max_line Maximum number of lines. * @return true iff the widget minimum size has changed. */

 * @return true iff the widget minimum size has changed.
 */
bool NWidgetResizeBase::UpdateMultilineWidgetSize(const std::string &str, int max_lines)
{
	int y = GetStringHeight(str, this->current_x);
	if (y > max_lines * GetCharacterHeight(FS_NORMAL)) {
		/* Text at the current width is too tall, so try to guess a better width. */
		Dimension d = GetStringBoundingBox(str);
		d.height *= max_lines;
		d.width /= 2;
		return this->UpdateSize(d.width, d.height);
	}
	return this->UpdateVerticalSize(y);
}

/**
 * Set absolute (post-scaling) minimal size of the widget.