Focus issue

[zxylllll]

I have integrated RmlUi with GLFW. I set the RmlUi window size to 400x300, and it contains a text input box. Meanwhile, the GLFW window size is set to 800x600. When clicking outside the RmlUi window on the GLFW area, the text box still retains focus. How should I handle this?

[mikke89]

Sounds like what you need is Context::ProcessMouseLeave when you detect that the mouse is leaving the context:
https://mikke89.github.io/RmlUiDoc/pages/cpp_manual/input.html#mouse-cursor-leave

[zxylllll]

I used Context::ProcessMouseLeave but failed to implement the function, perhaps I used it incorrectly. I temporarily resolved the issue using the code below.

void MouseButtonCallback(GLFWwindow* _w, int button, int action, int mods)
{
    if (button == GLFW_MOUSE_BUTTON_LEFT) 
	{
        double xpos, ypos;
        glfwGetCursorPos(window, &xpos, &ypos);
        auto context = app->getRmlUiContext();
        if (context) 
		{
            Rml::ElementDocument* document = context->GetDocument("test");
            if (document) 
			{
                Rml::Vector2f doc_position = document->GetAbsoluteOffset();
                Rml::Vector2f doc_dimensions = document->GetBox().GetSize();

                if (xpos < doc_position.x || xpos > doc_position.x + doc_dimensions.x || ypos < doc_position.y ||
                    ypos > doc_dimensions.y) 
				{
                    if (action) 
                    {
                        //context->ProcessMouseLeave();
                        Rml::Element* focused_element = context->GetFocusElement();

                        if (focused_element) 
						{
                            focused_element->Blur();
                        }
                    }
                    return;
                }
                else 
				{
                    RmlGLFW::ProcessMouseButtonCallback(app->getRmlUiContext(), button, action, mods);
                }
            }
        }
    }
}

[mikke89]

Oh, right, I believe my suggestion with ProcessMouseLeave only handles the hovered element, but not the focused element. Your solution there looks good in my view.