I made a simple program with fluid to show the problem, to start with it crashs when a menu is selected !
What's wrong on it ? En 08/11/2010 10:36:29, Greg Ercolano <[email protected]> escribió:
I always try to use Fl_Menu::add() myself.. avoids weirdness. Domingo Alvarez Duarte wrote:Looking at the menu_generated code a bit more it seems that use of anystatic structure isn't a good solution at all because it prevents derived classes to work properly, because if we derive a window with a menubar andmake some changes on it's menus like changing callbacks or renaming entries this changes will reflect on the base class too and probably we don't want that.No, IIRC, when a static array is assigned, the first time you make any changes, FLTK internally makes a malloc()ed copy so that it can then be safely modified. I believe FLTK keeps track of this internally, so once the allocated copy is made, it doesn't make new copies, and gets deleted when the menu does, or when a new static array is assigned. This behavior is documented in Fl_Menu::menu(const Fl_Menu_Item*), the method that assigns static arrays: http://fltk.org/doc-1.3/classFl__Menu__.html#a0708c71ee8422bf3e92b8fa471eda9f ------------------------------------------------------------------------------ void Fl_Menu_::menu(const Fl_Menu_Item*m) [..] If you try to modify the array (with add(), replace(), or remove()) a private copy is automatically done. ------------------------------------------------------------------------------ I believe FLTK internally uses malloc() [or similar] to make a copy of the array's data, and sets a flag so it knows it'sdynamic, so that new copies don't need to be made, it gets free()ed, etc.Regarding fluid, maybe it could have an option to generate dynamic code with 'add()' as an option to generating a static array.
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menubartest.fl
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