[ENHANCEMENT] Add the ability to close a dropdown combo_box programmatically

[jimorc]

Your question

Here is a test program that displays a combo_box. The list is populated when the dropdown list is displayed, and an item is selected. I would like to close the dropdown list programmatically, but I have found no method to do so. Have I missed the method, is it not possible, or does this need to be an enhancement?

#include <xtd/xtd>

using namespace xtd;
using namespace xtd::forms;

class form1 : public form {
  public:
    form1() {
      box_.drop_down += event_handler(*this, &form1::box_drop_down);
      *this << box_;
    }
    void box_drop_down(object& sender, const event_args& e)
    {
      box_.items().clear();
      box_.items().push_back({"Item 1"});
      box_.selected_index(0);
    }
  private:
    combo_box box_;
};

int main()
{
  application::run(form1 {} );
}

[gammasoft71]

This feature is not implemented. I will add it ASAP.

[gammasoft71]

I will add the following property :

/// @brief Gets a value indicating whether the combo box is displaying its drop-down portion.
bool dropped_down() const;

/// @brief Sets a value indicating whether the combo box is displaying its drop-down portion.
void dropped_down(bool value);

[gammasoft71]

For information

• This feature is only available with the combo_box control.
• The choice control does not and will not have this functionality.

[jimorc]

This change does not appear to work.

I changed the box_drop_down event handler as follows and get these results:

voidbox_drop_down(object&sender, consteventargs&e) { std::cout << (box.droppeddown() ? "true": "false") << '\n'; box.items().clear(); box_.items().pushback({"Item 1"}); box.selectedindex(0); box.dropped_down(false);

true is printed. OK.

The dropdown list does not close.

On 2022-10-21 16:53, Gammasoft wrote:

Closed #201 https://github.com/gammasoft71/xtd/issues/201 as completed.

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-- Jim

[gammasoft71]

Indeed, after checking this feature is not supported by macOS but works correctly on Windows and Linux. So I will adapt the documentation.