Alex wrote:
> I would like to have complete control over drawing my main window. I want a
> toolkit to make various dialogs for the application easy, but I want to do
> all the drawing in my main window.
Best thing to do is derive a class from Fl_Window called eg. MainWindow,
and make a draw() method for that class so you can take complete control
over what's drawn in that entire window. You can use functions like
fl_rect(), fl_rectf(), fl_line(),
fl_draw()/fl_font()/fl_size()/fl_color()
to draw shapes, text, etc. eg:
http://seriss.com/people/erco/fltk/#FltkX
..which shows a derived class called DrawX, which you would change
to 'MainWindow'.
If you're just wanting to blit pixels to the screen (ie. an image
viewer), then you can use fl_draw_pixels() to write raw RGB data
quickly to the screen, eg:
http://seriss.com/people/erco/fltk/#FlDrawImage
Or, make the main window an OpenGL widget, and use opengl calls to
manage the screen, instead of the FLTK fl_xxx() drawing functions, eg:
http://seriss.com/people/erco/fltk/#OpenGlSimple
..where 'MyGlWindow' is derived from Fl_Gl_Window, and in that case
you would make it part of an Fl_Window, using the entire xywh area of
the window. To do blitting, I think the opengl equivalent of
fl_draw_image()
is glDrawPixels().
Or, if you want some FLTK widgets to appear in the same window
as the opengl app, then see:
http://seriss.com/people/erco/fltk/#OpenGlSimpleWidgets
..where the opengl widget only takes a part of the Fl_Window,
leaving some room for FLTK widgets at the bottom.
Either way, all your opengl code goes into the draw() method
for your Fl_Gl_Window-derived class.
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