How to make a button in OpenGL c++ with imgui

Question

I want to know how to make buttons in OpenGL c++ with glfw. I know how to make a button and text box in OpenGL but I have one problem. When I make a button on the top of the imgui, there is a window like rectangle that has a name(imgui demo, or any name you name it) I want to remove that. And can I blend the color in so the OpenGL window and imgui window look the same. Just remove the top part and blend color.

As you can see in the image everything is the same expect the top part. I want to fix that, or remove it.

Answer 1

You can easily use any of the Window creation flags

ImGuiWindowFlags flags = ImGuiWindowFlags_NoMove
                         | ImGuiWindowFlags_NoDecoration
                         | ImGuiWindowFlags_AlwaysAutoResize
                         | ImGuiWindowFlags_NoSavedSettings;

if(transparent) flags |= ImGuiWindowFlags_NoBackground;

ImGui::Begin("##name", nullptr, flags);
{

... buttons widget etc..

}
ImGui::End();

Please refer the imgui_demo.cpp. It got everything possible with imgui