Method resizeFrame

src/openrct2/interface/WindowBase.cpp:74–146

    }

    void WindowBase::resizeFrame()
    {
        if (widgets.size() < 3)
            return;

        // Frame
        auto& frameWidget = widgets[0];
        if (frameWidget.type == WidgetType::frame)
        {
            frameWidget.right = width - 1;
            frameWidget.bottom = height - 1;
        }

        // Title/caption
        auto& titleWidget = widgets[1];
        bool hasTitleWidget = titleWidget.type == WidgetType::caption;
        if (hasTitleWidget)
            titleWidget.right = width - 2;

        // Close button
        auto& closeButton = widgets[2];
        if (closeButton.type == WidgetType::closeBox || closeButton.type == WidgetType::empty)
        {
            bool translucent = colours[closeButton.colour].flags.has(ColourFlag::translucent);
            repositionCloseButton(closeButton, width, translucent);
        }

        // Page/resize widget
        if (widgets.size() >= 4)
        {
            auto& pageWidget = widgets[3];
            if (pageWidget.type == WidgetType::resize)
            {
                pageWidget.right = width - 1;
                pageWidget.bottom = height - 1;
            }
        }

        // Figure out if we need to push the other widgets down to accommodate a resized title/caption
        auto preferredHeight = getTitleBarTargetHeight();
        auto currentHeight = titleWidget.height() - 1;
        auto heightDifference = preferredHeight - currentHeight;

        if (!hasTitleWidget || heightDifference == 0)
            return;

        invalidate();

        // Offset title and close button
        titleWidget.bottom += heightDifference;
        closeButton.bottom += heightDifference;

        height += heightDifference;
        minHeight += heightDifference;
        maxHeight += heightDifference;

        invalidate();