Re: how to clip? -> add example

[Klaus Rudolph <lts-rudolph gmx de>]

Hi again,

I try to draw a line inside a box. The line should not go outside the
box. But I could not find the clip methods :-(

The following example is ready to compile but did not work with clipping :-(

Any hints?

If it is not possible to clip with goocanvas, can give me someone a code
snippet to draw in any other way with gtkmm?

Is there any good actual gtkmm book?

Regards
  Klaus

#include <iostream>

using namespace std;

#include <gtkmm.h>
#include <goocanvasmm.h>

int main(int argc, char* argv[])
{
    Gtk::Main app(&argc, &argv);
    Goocanvas::init("example", "0.1", argc, argv);

    Gtk::Window win;

    Goocanvas::Canvas m_canvas;
    m_canvas.set_size_request(640, 480);
    m_canvas.set_bounds(0, 0, 800, 800);
    Glib::RefPtr<Goocanvas::Item> root = m_canvas.get_root_item();

    //--------------------------------

    Glib::RefPtr<Goocanvas::Rect>  m_rect =
Goocanvas::Rect::create(40,40, 60, 60);
    m_rect->property_line_width() = 1.0;
    m_rect->property_stroke_color() = "black";
    m_rect->property_fill_color() = "blue";

    root->add_child( m_rect);

    //--------------------------------

    Glib::RefPtr<Goocanvas::Polyline> m_line =
Goocanvas::Polyline::create( 40,40,100,100);
    m_line->property_line_width() = 10;
    m_line->property_stroke_color() = "black";

    root->add_child( m_line);


    Gtk::ScrolledWindow* sw = Gtk::manage(new Gtk::ScrolledWindow());
    sw->add(m_canvas);
    win.add(*sw);
    win.show_all_children();

    Gtk::Main::run(win);
    return 0;
}

Thanks
 Klaus