The "Wheelbarrow" example may be helpful here: http://www.gtkmm.org/docs/gtkmm-2.4/examples/window/wheelbarrow.cc
I couldn't find it in the current tutorial, but it seems to me it used to in the tutorial (maybe it still is and I couldn't find it). But the example file still exists on the server. jonathon On 11/23/05, Paul Davis <[EMAIL PROTECTED]> wrote: > On Wed, 2005-11-23 at 01:37 -0500, Martin Bailey wrote: > > Hi, > > > > Sorry for asking such a basic question; I'm simply unable to unable to > > find my answer in the documentation and this is my first attempt at gtkmm. > > > > I'd like draw a Bitmap outside a Window. That is, I would like to draw > > an irregular black shape (from a bitmap matrix) directly in the display, > > over any other programs. > > I don't want to draw inside a Window because I don't want my application > > to receive any events; just draw over other applications, or in a way > > hide some parts of them with a binary bitmap. > > For example, with a 1024x768 resolution, I want a background PDF viewer > > to remain visible while I can draw anything over it in the same 1024x768 > > region. > > > > So as I understand, I must create a Bitmap in the same way that I create > > a Window, and then create a GC to draw inside my bitmap. > > Is that right? > > What C++ code do I need to get these elements created properly? > > it doesn't work this way. > > all drawing goes to a window. no exceptions. > > what you can do is to use Gtk::Window::shape_combine_mask() to change > the shape of the window from rectangular to the outline of your bitmap. > you will need to experiment with shape_combine_mask() - i have used it > long ago, and its slightly more complex than it appears. google may even > find some postings of my (and others') code. > > the other thing you might look at for insight is a program called > gromit, which allows the user to scribble directly on the display, > although AFAIK it also uses the shape_combine_mask() trick. i use gromit > for presentations when i want to be able to draw over the top of (e.g) > an openoffice slide show. > > --p > > > _______________________________________________ > gtkmm-list mailing list > [email protected] > http://mail.gnome.org/mailman/listinfo/gtkmm-list >
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