void wxTextEntry::WriteText(const wxString& value)
{
GtkEditable * const edit = GetEditable();
// remove the selection if there is one and suppress the text change event
// generated by this: we only want to generate one event for this change,
// not two
{
EventsSuppressor noevents(this);
gtk_editable_delete_selection(edit);
}
// insert new text at the cursor position
gint len = gtk_editable_get_position(edit);
gtk_editable_insert_text
(
edit,
wxGTK_CONV_FONT(value, GetEditableWindow()->GetFont()),
-1, // text: length: compute it using strlen()
&len // will be updated to position after the text end
);
// and move cursor to the end of new text
gtk_editable_set_position(edit, len);
}
// Notice we don't check here the font. It is supposed to be OK before the call.
void wxTextMeasure::DoGetTextExtent(const wxString& string,
wxCoord *width,
wxCoord *height,
wxCoord *descent,
wxCoord *externalLeading)
{
if ( !m_context )
{
if ( width )
*width = 0;
if ( height )
*height = 0;
return;
}
// Set layout's text
const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(string, GetFont());
if ( !dataUTF8 )
{
// hardly ideal, but what else can we do if conversion failed?
wxLogLastError(wxT("GetTextExtent"));
return;
}
pango_layout_set_text(m_layout, dataUTF8, -1);
if ( m_dc )
{
// in device units
pango_layout_get_pixel_size(m_layout, width, height);
}
else // win
{
// the logical rect bounds the ink rect
PangoRectangle rect;
pango_layout_get_extents(m_layout, NULL, &rect);
*width = PANGO_PIXELS(rect.width);
*height = PANGO_PIXELS(rect.height);
}
if (descent)
{
PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
int baseline = pango_layout_iter_get_baseline(iter);
pango_layout_iter_free(iter);
*descent = *height - PANGO_PIXELS(baseline);
}
if (externalLeading)
{
// No support for MSW-like "external leading" in Pango.
*externalLeading = 0;
}
}
bool wxTextMeasure::DoGetPartialTextExtents(const wxString& text,
wxArrayInt& widths,
double scaleX)
{
if ( !m_layout )
return wxTextMeasureBase::DoGetPartialTextExtents(text, widths, scaleX);
// Set layout's text
const wxCharBuffer dataUTF8 = wxGTK_CONV_FONT(text, GetFont());
if ( !dataUTF8 )
{
// hardly ideal, but what else can we do if conversion failed?
wxLogLastError(wxT("GetPartialTextExtents"));
return false;
}
pango_layout_set_text(m_layout, dataUTF8, -1);
// Calculate the position of each character based on the widths of
// the previous characters
// Code borrowed from Scintilla's PlatGTK
PangoLayoutIter *iter = pango_layout_get_iter(m_layout);
PangoRectangle pos;
pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
size_t i = 0;
while (pango_layout_iter_next_cluster(iter))
{
pango_layout_iter_get_cluster_extents(iter, NULL, &pos);
int position = PANGO_PIXELS(pos.x);
widths[i++] = position;
}
const size_t len = text.length();
while (i < len)
widths[i++] = PANGO_PIXELS(pos.x + pos.width);
pango_layout_iter_free(iter);
return true;
}