emplace_at()

template<typename control_t , typename ... args_t>

control_t & xtd::forms::control::control_collection::emplace_at ( size_t  index, args_t &&...  args  )

inline

Creates and inserts specified control at specified position.

Parameters

index	The index before which the content will be inserted.
args	The arguments to forward to the create method of the control

Returns

A reference to the created control.

Remarks

The control will be destroyed automatically when the control no longer has a parent.

For creation and insertion, this method uses the xtd::forms::control::create methods of the various controls.

Examples

The folowing example demonstartes the use of xtd::forms::control::control_collection::emplace, xtd::forms::control::control_collection::emplace_at and xtd::forms::control::control_collection::emplace_back methods.

#include <xtd/forms/application>
#include <xtd/forms/button>
#include <xtd/forms/form>
#include <xtd/forms/label>
 
using namespace xtd::drawing;
using namespace xtd::forms;
 
auto main() -> int {
  auto button1_clicked = 0, button2_clicked = 0;
  auto form1 = xtd::forms::form::create("Emplace example");
  form1.controls().emplace<xtd::forms::button>(form1.controls().begin(), "Button 1", point{50, 50}).click += [&] {
    form1.controls()["label1"].value().get().text(xtd::string::format("Button 1 clicked {} times", ++button1_clicked));
  };
  form1.controls().emplace_at<xtd::forms::button>(1, "Button 2", point {50, 100}, size {200, 75}).auto_repeat(true).click += [&] {
    form1.controls()["label2"].value().get().text(xtd::string::format("Button 2 clicked {} times", ++button2_clicked));
  };
  form1.controls().emplace<xtd::forms::label>(form1.controls().end(), "Button 1 clicked 0 times", point {50, 200}, size {200, 23}, "label1");
  form1.controls().emplace_back<xtd::forms::label>("Button 2 clicked 0 times", point {50, 230}, size {200, 23}, "label2");
  xtd::forms::application::run(form1);
}

Examples

emplace.cpp.