I am using gtkmm for a GUI in C++.
I have a Gtk::DrawingArea
on which I have an image (filename):
class MyArea : public Gtk::DrawingArea
{
public:
MyArea(string filename)
{
m_image = Gdk::Pixbuf::create_from_file(filename.c_str());
}
virtual bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr)
{
if (!m_image)
return false;
Gtk::Allocation allocation = get_allocation();
const int width = allocation.get_width();
const int height = allocation.get_height();
// Draw the image in the middle of the drawing area, or (if the image is
// larger than the drawing area) draw the middle part of the image.
Gdk::Cairo::set_source_pixbuf(cr, m_image, (width - m_image->get_width())/2, (height - m_image->get_height())/2);
cr->paint();
return true;
}
Glib::RefPtr<Gdk::Pixbuf> m_image;
}
I would like to have a function that change the image (with filename2). But I can't find how to :-/
Could someone help me with this please. Thank You
As a member of your class:
void change_image(string filename2)
{
m_image = Gdk::Pixbuf::create_from_file(filename2.c_str());
queue_draw();
}