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implement wxCairoContext::GetPartialTextExtents for wxGTK

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71855 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2012-06-24 06:33:07 +00:00
parent 8bc6150f03
commit 6186cb7416
1 changed files with 25 additions and 6 deletions
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31
src/generic/graphicc.cpp
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@@ -2112,14 +2112,33 @@ void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDoub
void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
{
widths.Empty();
widths.Add(0, text.length());
wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
if (text.empty())
return;
#if __WXGTK__
const wxCharBuffer data = text.utf8_str();
int w = 0;
if (data.length())
{
PangoLayout* layout = pango_cairo_create_layout(m_context);
const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
pango_layout_set_text(layout, data, data.length());
PangoLayoutIter* iter = pango_layout_get_iter(layout);
PangoRectangle rect;
do {
pango_layout_iter_get_cluster_extents(iter, NULL, &rect);
w += rect.width;
widths.Add(PANGO_PIXELS(w));
} while (pango_layout_iter_next_cluster(iter));
pango_layout_iter_free(iter);
g_object_unref(layout);
}
size_t i = widths.GetCount();
const size_t len = text.length();
while (i++ < len)
widths.Add(PANGO_PIXELS(w));
#else
// TODO
#endif
}
void * wxCairoContext::GetNativeContext()