/*
 * Copyright 2021, Pascal R. G. Abresch, nep@packageloss.eu.
 * Distributed under the terms of the MIT License.
 */

#include <ControlLook.h>
#include <View.h>


namespace BPrivate {


void
AdoptScrollBarFontSize(BView* view)
{
        float maxSize = be_control_look->GetScrollBarWidth();
        BFont testFont = be_plain_font;
        float currentSize;
        font_height fontHeight;

        float minFontSize = 0.0f;
        float maxFontSize = 48.0f;

        while (maxFontSize - minFontSize > 1.0f) {
                float midFontSize = (maxFontSize + minFontSize) / 2.0f;

                testFont.SetSize(midFontSize);
                testFont.GetHeight(&fontHeight);
                currentSize = fontHeight.ascent + fontHeight.descent;

                if (currentSize > maxSize)
                        maxFontSize = midFontSize;
                else
                        minFontSize = midFontSize;
        }

        view->SetFontSize(minFontSize);
}


} // namespace BPrivate