/**
* Gets column width.
* The meaning of what a column is can be considered a fairly weak
* notion for some fonts. This method is used to define the width
* of a column. By default this is defined to be the width of the
* character <em>m</em> for the font used. This method can be
* redefined to be some alternative amount.
*
* @return the column width >= 1
*/
/*protected*/ int JTextArea::getColumnWidth() {
if (columnWidth == 0) {
QFontMetrics metrics = QFontMetrics(font());
columnWidth = metrics.charWidth(QString("m"),0);
}
return columnWidth;
}
int Font::width(QChar *chs, int, int pos, int len, int start, int end, int toAdd) const
{
const QConstString cstr(chs + pos, len);
int w = 0;
const QString qstr = cstr.string();
if(scFont)
{
const QString upper = qstr.upper();
const QChar *uc = qstr.unicode();
const QFontMetrics sc_fm(*scFont);
for(int i = 0; i < len; ++i)
{
if((uc + i)->category() == QChar::Letter_Lowercase)
w += sc_fm.charWidth(upper, i);
else
w += fm.charWidth(qstr, i);
}
}
else
{
// ### might be a little inaccurate
w = fm.width(qstr);
}
if(letterSpacing)
w += len * letterSpacing;
if(wordSpacing)
// add amount
for(int i = 0; i < len; ++i)
{
if(chs[i + pos].category() == QChar::Separator_Space)
w += wordSpacing;
}
if(toAdd)
{
// first gather count of spaces
int numSpaces = 0;
for(int i = start; i != end; ++i)
if(chs[i].category() == QChar::Separator_Space)
++numSpaces;
// distribute pixels evenly among spaces, but count only those within
// [pos, pos+len)
for(int i = start; numSpaces && i != pos + len; i++)
if(chs[i].category() == QChar::Separator_Space)
{
const int a = toAdd / numSpaces;
if(i >= pos)
w += a;
toAdd -= a;
--numSpaces;
}
}
return w;
}
QString KSqueezeLabel::squeezer(const QString &s, const QFontMetrics& fm, uint width)
{
if (s.isEmpty() || uint(fm.width(s)) <= width) {
return s;
}
const unsigned int length = s.length();
if (length == 2)
return s;
const int maxWidth = width - fm.width('.') * 3;
if (maxWidth <= 0)
return "...";
unsigned int leftIdx = 0, rightIdx = length;
unsigned int leftWidth = fm.charWidth(s, leftIdx++);
unsigned int rightWidth = fm.charWidth(s, --rightIdx);
while (leftWidth + rightWidth < uint(maxWidth)) {
while (leftWidth <= rightWidth && leftWidth + rightWidth < uint( maxWidth)) {
leftWidth += fm.charWidth(s, leftIdx++);
}
while (rightWidth <= leftWidth && leftWidth + rightWidth < uint( maxWidth)) {
rightWidth += fm.charWidth(s, --rightIdx);
}
}
if (leftWidth > rightWidth) {
--leftIdx;
} else {
++rightIdx;
}
rightIdx = length - rightIdx;
if ((leftIdx == 0 && rightIdx == 1) || (leftIdx == 1 && rightIdx == 0))
return "...";
return s.left(leftIdx) + "..." + s.right(rightIdx);
}
