1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#![deny(unsafe_op_in_unsafe_fn)]
use std::cell::OnceCell;
use objc2::rc::Retained;
use objc2::runtime::ProtocolObject;
use objc2::{define_class, msg_send, DefinedClass, MainThreadOnly};
use objc2_app_kit::{
NSApplication, NSApplicationActivationPolicy, NSApplicationDelegate, NSAutoresizingMaskOptions,
NSBackingStoreType, NSColor, NSFont, NSTextAlignment, NSTextField, NSWindow, NSWindowDelegate,
NSWindowStyleMask,
};
use objc2_foundation::{
ns_string, MainThreadMarker, NSNotification, NSObject, NSObjectProtocol, NSPoint, NSRect,
NSSize,
};
#[derive(Debug, Default)]
struct AppDelegateIvars {
window: OnceCell<Retained<NSWindow>>,
}
define_class!(
// SAFETY:
// - The superclass NSObject does not have any subclassing requirements.
// - `Delegate` does not implement `Drop`.
#[unsafe(super = NSObject)]
#[thread_kind = MainThreadOnly]
#[ivars = AppDelegateIvars]
struct Delegate;
// SAFETY: `NSObjectProtocol` has no safety requirements.
unsafe impl NSObjectProtocol for Delegate {}
// SAFETY: `NSApplicationDelegate` has no safety requirements.
unsafe impl NSApplicationDelegate for Delegate {
// SAFETY: The signature is correct.
#[unsafe(method(applicationDidFinishLaunching:))]
fn did_finish_launching(&self, notification: &NSNotification) {
let mtm = self.mtm();
let app = unsafe { notification.object() }
.unwrap()
.downcast::<NSApplication>()
.unwrap();
let text_field = unsafe {
let text_field = NSTextField::labelWithString(ns_string!("Hello, World!"), mtm);
text_field.setFrame(NSRect::new(
NSPoint::new(5.0, 100.0),
NSSize::new(290.0, 100.0),
));
text_field.setTextColor(Some(&NSColor::colorWithSRGBRed_green_blue_alpha(
0.0, 0.5, 0.0, 1.0,
)));
text_field.setAlignment(NSTextAlignment::Center);
text_field.setFont(Some(&NSFont::systemFontOfSize(45.0)));
text_field.setAutoresizingMask(
NSAutoresizingMaskOptions::ViewWidthSizable
| NSAutoresizingMaskOptions::ViewHeightSizable,
);
text_field
};
// SAFETY: We disable releasing when closed below.
let window = unsafe {
NSWindow::initWithContentRect_styleMask_backing_defer(
NSWindow::alloc(mtm),
NSRect::new(NSPoint::new(0.0, 0.0), NSSize::new(300.0, 300.0)),
NSWindowStyleMask::Titled
| NSWindowStyleMask::Closable
| NSWindowStyleMask::Miniaturizable
| NSWindowStyleMask::Resizable,
NSBackingStoreType::Buffered,
false,
)
};
// SAFETY: Disable auto-release when closing windows.
// This is required when creating `NSWindow` outside a window
// controller.
unsafe { window.setReleasedWhenClosed(false) };
// Set various window properties.
window.setTitle(ns_string!("A window"));
let view = window.contentView().expect("window must have content view");
unsafe { view.addSubview(&text_field) };
window.center();
unsafe { window.setContentMinSize(NSSize::new(300.0, 300.0)) };
window.setDelegate(Some(ProtocolObject::from_ref(self)));
// Show the window.
window.makeKeyAndOrderFront(None);
// Store the window in the delegate.
self.ivars().window.set(window).unwrap();
app.setActivationPolicy(NSApplicationActivationPolicy::Regular);
// Activate the application.
// Required when launching unbundled (as is done with Cargo).
#[allow(deprecated)]
app.activateIgnoringOtherApps(true);
}
}
// SAFETY: `NSWindowDelegate` has no safety requirements.
unsafe impl NSWindowDelegate for Delegate {
#[unsafe(method(windowWillClose:))]
fn window_will_close(&self, _notification: &NSNotification) {
// Quit the application when the window is closed.
unsafe { NSApplication::sharedApplication(self.mtm()).terminate(None) };
}
}
);
impl Delegate {
fn new(mtm: MainThreadMarker) -> Retained<Self> {
let this = Self::alloc(mtm).set_ivars(AppDelegateIvars::default());
// SAFETY: The signature of `NSObject`'s `init` method is correct.
unsafe { msg_send![super(this), init] }
}
}
fn main() {
let mtm = MainThreadMarker::new().unwrap();
let app = NSApplication::sharedApplication(mtm);
let delegate = Delegate::new(mtm);
app.setDelegate(Some(ProtocolObject::from_ref(&*delegate)));
app.run();
}
|
