void ttext_::set_selection(size_t start, int length)
{
const size_t text_size = text_.get_length();
if(start >= text_size) {
start = text_size;
}
if(length == 0) {
set_cursor(start, false);
return;
}
// The text pos/size type differs in both signedness and size with the
// selection length. Such is life.
const int sel_start = std::min<size_t>(start, std::numeric_limits<int>::max());
const int sel_max_length = std::min<size_t>(text_size - start, std::numeric_limits<int>::max());
const bool backwards = length < 0;
if(backwards && -length > sel_start) {
length = -sel_start;
} else if(!backwards && length > sel_max_length) {
length = sel_max_length;
}
set_selection_start(start);
set_selection_length(length);
update_canvas();
}
void tpassword_box::pre_function() {
// ttext_box::set_value() will reset the selection,
// we therefore have to remember it
size_t selection_start = get_selection_start();
size_t selection_length = get_selection_length();
// Tell ttext_box the actual input of this box
ttext_box::set_value(real_value_);
// Restore the selection
set_selection_start(selection_start);
set_selection_length(selection_length);
}
void tpassword_box::post_function() {
// See above
size_t selection_start = get_selection_start();
size_t selection_length = get_selection_length();
// Get the input back and make ttext_box forget it
real_value_ = get_value();
ttext_box::set_value(std::string(get_text_length(real_value_), '*'));
// See above
set_selection_start(selection_start);
set_selection_length(selection_length);
// Why do the selection functions not update
// the canvas?
update_canvas();
set_dirty(true);
}