click on Inputtext no refreshing text

[kmilo9999]

Version/Branch of Dear ImGui:

Version: 1.73
Branch: XXX (master/viewport/docking/etc.)

OpenGL/ Visual studio 2019/

Back-ends: Custom engine

Operating System: Windows 10

I have a modal window that contains an input text field. Using the keyboard events from my custom engine, I update a char array that I linked to the the input text field. However, when I click on the input field (I guess to do focus on it), the input text field doesnt refresh from the data in my char array. If I click outside the input field (lose focus), the input refresh with the char array (check the gif below).

Any thoughts why this could be happening?

Screenshots/Video

// Here's some code anyone can copy and paste to reproduce your issue
 ImGui::OpenPopup(modal_window_name.c_str());
if (ImGui::BeginPopupModal(modal_window_name.c_str(), &m_open_modal))
{
  char* writable = new char[m_copy_name.size() + 1];
  std::copy(m_copy_name.begin(), m_copy_name.end(), writable);
  writable[m_copy_name.size()] = '\0'; // don't forget the terminating 0
   ImGui::InputText("##textcameraname", writable, IM_ARRAYSIZE(writable));
}
ImGui::EndPopup();

[Ressley]

Use static size for writable

[jokteur]

I suppose that m_copy_name is a std::string ?
In which case, you can include imgui_stdlib and directly use your std::string:

#include "misc/cpp/imgui_stdlib.h"

[...]
ImGui::InputText("##textcameraname", &m_copy_name);

[kmilo9999]

I tried both suggested approaches, none of them worked :(

• Set a static size for writable did not change the behavior.

       char writable[50];
      std::copy(m_copy_name.begin(), m_copy_name.end(), writable);
      writable[m_copy_name.size()] = '\0'; // don't forget the terminating 0
      ImGui::InputText("##textcameraname", writable, IM_ARRAYSIZE(writable));

• Switch to misc/cpp/imgui_stdlib.h

 #include "./imgui_stdlib.h"
 ImGui::InputText("##textcameraname",&m_copy_name );

In this case, the inputtext only refresh if there's no focus on the ui element.

What could be the main root of the issue? I could debug specific parts if you can point them out.
My educated guess is, there are problems relating the active window and the on-focused element. I have code on my custom engine where the active imgui-window is the one the mouse is hovering. I dont know if that is affecting the focus properties of the InputField.

[ocornut]

InputText() owns a copy of the data when active, it won't reload text from the user arg when active.
See #3878 , #2890 , #2881 , #1506

[kmilo9999]

implementing the #3290 workaround did the trick.