Demonstrate old/legacy Columns API! [2020: Columns are under-featured and not maintained. Prefer using the more flexible and powerful BeginTable() API

Display placeholder contents for the Document

Display context menu for the Document

Find glyph, return fallback if missing

Window has already passed the IsWindowNavFocusable()

This is only used in rare/specific situations to manufacture an ID out of nowhere. FIXME: Consider instead storing last non-zero ID + count of success

GLFW doesn't allow to distinguish Mouse vs TouchScreen vs Pen. Add support for Win32 (based on imgui_impl_win32), because we rely on _TouchScreen info

FIXME-TABLE: This prevents us from using ImGuiListClipper _inside_ a table cell. The problem we have is that without a Begin/End scheme for rows using

As we allow to change document name, we append a never-changing document ID so tabs are stable

Closely mimics PathBezierToCasteljau() in imgui_draw.cpp

You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. - When io.WantCaptureMouse is true,

Render function.

ev->keyboard.modifiers seems always zero so using that...