bool wxTextMeasureBase::DoGetPartialTextExtents(const wxString& text,
wxArrayInt& widths,
double scaleX)
{
int totalWidth = 0;
// reset the cache if font or horizontal scale have changed
if ( !s_fontWidthCache.m_widths ||
!wxIsSameDouble(s_fontWidthCache.m_scaleX, scaleX) ||
(s_fontWidthCache.m_font != *m_font) )
{
s_fontWidthCache.Reset();
s_fontWidthCache.m_font = *m_font;
s_fontWidthCache.m_scaleX = scaleX;
}
// Calculate the position of each character based on the widths of
// the previous characters. This is inexact for not fixed fonts.
int n = 0;
for ( wxString::const_iterator it = text.begin();
it != text.end();
++it )
{
const wxChar c = *it;
unsigned int c_int = (unsigned int)c;
int w;
if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
{
w = s_fontWidthCache.m_widths[c_int];
}
else
{
DoGetTextExtent(c, &w, NULL);
if (c_int < FWC_SIZE)
s_fontWidthCache.m_widths[c_int] = w;
}
totalWidth += w;
widths[n++] = totalWidth;
}
return true;
}
bool wxDCBase::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
{
int totalWidth = 0;
size_t i, len = text.Length();
widths.Empty();
widths.Add(0, len);
int w, h;
// reset the cache if font or horizontal scale have changed
if (!s_fontWidthCache.m_widths ||
(s_fontWidthCache.m_scaleX != m_scaleX) ||
(s_fontWidthCache.m_font != GetFont()))
{
s_fontWidthCache.Reset();
s_fontWidthCache.m_font = GetFont();
s_fontWidthCache.m_scaleX = m_scaleX;
}
// Calculate the position of each character based on the widths of
// the previous characters
for (i=0; i<len; i++)
{
const wxChar c = text[i];
unsigned int c_int = (unsigned int)c;
if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
{
w = s_fontWidthCache.m_widths[c_int];
}
else
{
GetTextExtent(c, &w, &h);
if (c_int < FWC_SIZE)
s_fontWidthCache.m_widths[c_int] = w;
}
totalWidth += w;
widths[i] = totalWidth;
}
return true;
}