How to use set_source_pixbuf in rust? - rust

Question

I have a code where i use set_source_pixbuf,
use gdk::prelude::*;
use gdk_pixbuf::{Colorspace, Pixbuf};
use gtk::prelude::*;
use std::sync::{Arc, Mutex};
use super::prelude::*;
mod control_panel;
use control_panel::setup_control_panel;
macro_rules! clone {
(#param _) => ( _ );
(#param $x:ident) => ( $x );
($($n:ident),+ => move || $body:expr) => (
{
$( let $n = $n.clone(); )+
move || $body
}
);
($($n:ident),+ => move |$($p:tt),+| $body:expr) => (
{
$( let $n = $n.clone(); )+
move |$(clone!(#param $p),)+| $body
}
);
}
pub fn process_key(controller: &Arc<Mutex<Controller>>, drawing_area: &gtk::DrawingArea, key: u16) {
{
let mut contr = controller.lock().unwrap();
contr.process_key(key);
}
drawing_area.queue_draw();
}
pub fn build_ui(app: &gtk::Application) {
let window = gtk::ApplicationWindow::new(app);
window.set_title("Muscle");
let glade_src = "config/control_window.glade";
let builder = gtk::Builder::from_file(glade_src);
let control_window: gtk::Window = builder.get_object("window").expect("Couldn't get window");
control_window.set_application(Some(app));
control_window.set_title("Control panel");
let fixed = gtk::Fixed::new();
let drawing_area = gtk::DrawingArea::new();
fixed.add(&drawing_area);
window.add(&fixed);
drawing_area.set_size_request(constants::WIDTH as i32, constants::HEIGHT as i32);
let Config {
muscle_config: mconf,
carcass_config: cconf,
} = read_from_config();
let muscle = Arc::new(Mutex::new(Muscle::new(
mconf.radiuses,
mconf.grow_mults,
mconf.len,
)));
let carcass = Arc::new(Mutex::new(Carcass::new(
cconf.data,
cconf.thickness,
mconf.len,
)));
let pixbuf = Pixbuf::new(
Colorspace::Rgb,
constants::HAS_ALPHA,
constants::BITS_PER_COLOR,
constants::WIDTH as i32,
constants::HEIGHT as i32,
)
.unwrap();
let mut controller = Controller::new(pixbuf.clone(), muscle, carcass);
controller.update_pixbuf();
let controller = Arc::new(Mutex::new(controller));
drawing_area.connect_draw(clone!(pixbuf => move |_, context| {
context.set_source_pixbuf(&pixbuf, 0_f64, 0_f64);
context.paint();
Inhibit(false)
}));
window.connect_key_press_event(clone!(controller, drawing_area => move |_, key| {
process_key(&controller, &drawing_area, key.get_hardware_keycode());
Inhibit(false)
}));
window.show_all();
setup_control_panel(&builder, &controller, &drawing_area);
control_window.show_all();
}
when i try to build this module it gives me an error:
better0fdead#better0fdead-To-be-filled-by-O-E-M:~/Downloads/bmstu-cg-course$ cargo run --release
warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
Compiling course_g v0.1.0 (/home/better0fdead/Downloads/bmstu-cg-course)
error[E0599]: no method named `set_source_pixbuf` found for reference `&cairo::context::Context` in the current scope
--> src/lib/ui.rs:80:17
|
80 | context.set_source_pixbuf(&pixbuf, 0_f64, 0_f64);
| ^^^^^^^^^^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
|
1 | use gdk::cairo_interaction::GdkContextExt;
|
help: there is an associated function with a similar name
|
80 | context.set_source_rgb(&pixbuf, 0_f64, 0_f64);
| ~~~~~~~~~~~~~~
warning: unused import: `gdk::prelude`
--> src/lib/ui.rs:1:5
|
1 | use gdk::prelude::*;
| ^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
For more information about this error, try `rustc --explain E0599`.
warning: `course_g` (bin "course_g") generated 1 warning
error: could not compile `course_g` due to previous error; 1 warning emitted
i tried adding command : use gdk::cairo_interaction::GdkContextExt; to the file , which does not help me.
better0fdead#better0fdead-To-be-filled-by-O-E-M:~/Downloads/bmstu-cg-course$ cargo run --release
warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
Compiling course_g v0.1.0 (/home/better0fdead/Downloads/bmstu-cg-course)
error[E0603]: module `cairo_interaction` is private
--> src/lib/ui.rs:5:10
|
5 | use gdk::cairo_interaction::GdkContextExt;
| ^^^^^^^^^^^^^^^^^ private module
|
note: the module `cairo_interaction` is defined here
--> /home/better0fdead/.cargo/registry/src/github.com-1ecc6299db9ec823/gdk-0.15.2/src/lib.rs:31:1
|
31 | mod cairo_interaction;
| ^^^^^^^^^^^^^^^^^^^^^^
error[E0599]: no method named `set_source_pixbuf` found for reference `&cairo::context::Context` in the current scope
--> src/lib/ui.rs:81:17
|
81 | context.set_source_pixbuf(&pixbuf, 0_f64, 0_f64);
| ^^^^^^^^^^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
|
1 | use gdk::cairo_interaction::GdkContextExt;
|
help: there is an associated function with a similar name
|
81 | context.set_source_rgb(&pixbuf, 0_f64, 0_f64);
| ~~~~~~~~~~~~~~
warning: unused import: `gdk::prelude`
--> src/lib/ui.rs:1:5
|
1 | use gdk::prelude::*;
| ^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
Some errors have detailed explanations: E0599, E0603.
For more information about an error, try `rustc --explain E0599`.
warning: `course_g` (bin "course_g") generated 1 warning
error: could not compile `course_g` due to 2 previous errors; 1 warning emitted
use gdk::prelude::GdkContextExt;
does not work aswell
better0fdead#better0fdead-To-be-filled-by-O-E-M:~/Downloads/bmstu-cg-course$ cargo run --release
warning: the cargo feature `edition2021` has been stabilized in the 1.56 release and is no longer necessary to be listed in the manifest
See https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-edition-field for more information about using this feature.
Compiling course_g v0.1.0 (/home/better0fdead/Downloads/bmstu-cg-course)
error[E0599]: no method named `set_source_pixbuf` found for reference `&cairo::context::Context` in the current scope
--> src/lib/ui.rs:80:17
|
80 | context.set_source_pixbuf(&pixbuf, 0_f64, 0_f64);
| ^^^^^^^^^^^^^^^^^
|
= help: items from traits can only be used if the trait is in scope
help: the following trait is implemented but not in scope; perhaps add a `use` for it:
|
1 | use gdk::cairo_interaction::GdkContextExt;
|
help: there is an associated function with a similar name
|
80 | context.set_source_rgb(&pixbuf, 0_f64, 0_f64);
| ~~~~~~~~~~~~~~
warning: unused import: `gdk::prelude`
--> src/lib/ui.rs:1:5
|
1 | use gdk::prelude::*;
| ^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused import: `gdk::prelude::GdkContextExt`
--> src/lib/ui.rs:5:5
|
5 | use gdk::prelude::GdkContextExt;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
For more information about this error, try `rustc --explain E0599`.
warning: `course_g` (bin "course_g") generated 2 warnings
error: could not compile `course_g` due to previous error; 2 warnings emitted

Answer 1

As the error message says, gdt::cairo_interaction is a private module, so we can't use it.
The documentation says GdkContentExt is exposed in the gdk::prelude module. So importing it from the module solves the problem.
use gdk::prelude::GdkContentExt;