Method SelectAll

tutorials/common/imgui/imgui.h:2096–2096

    IMGUI_API void      DeleteChars(int pos, int bytes_count);
    IMGUI_API void      InsertChars(int pos, const char* text, const char* text_end = NULL);
    void                SelectAll()             { SelectionStart = 0; SelectionEnd = BufTextLen; }
    void                ClearSelection()        { SelectionStart = SelectionEnd = BufTextLen; }
    bool                HasSelection() const    { return SelectionStart != SelectionEnd; }
};