Struct fltk::app::GlobalState
source · pub struct GlobalState<T: Send + Sync> { /* private fields */ }
Expand description
Represents global state
Implementations§
source§impl<T: Sync + Send + 'static> GlobalState<T>
impl<T: Sync + Send + 'static> GlobalState<T>
sourcepub fn new(val: T) -> Self
pub fn new(val: T) -> Self
Creates a new global state
Examples found in repository?
examples/widget_id.rs (line 51)
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fn main() {
let counter = Counter { count: 0 };
let _state = app::GlobalState::new(counter);
let app = app::App::default().with_scheme(app::Scheme::Gtk);
let mut wind = window::Window::default()
.with_size(160, 200)
.with_label("Counter");
let col = group::Flex::default_fill().column();
button::Button::default()
.with_label("+")
.on_trigger(increment); // passed by function object
frame::Frame::default().with_label("0").with_id("my_frame"); // pass id here
button::Button::default()
.with_label("-")
.on_trigger(|_| increment_by(-1)); // called in closure
col.end();
wind.make_resizable(true);
wind.end();
wind.show();
app.run().unwrap();
}
More examples
examples/editor.rs (line 231)
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fn main() {
let a = app::App::default().with_scheme(app::Scheme::Oxy);
app::get_system_colors();
let mut buf = text::TextBuffer::default();
buf.set_tab_distance(4);
let state = State::new(buf.clone());
app::GlobalState::new(state);
let mut w = window::Window::default()
.with_size(WIDTH, HEIGHT)
.with_label("Ted");
w.set_xclass("ted");
{
let mut col = group::Flex::default_fill().column();
col.set_pad(0);
let mut m = menu::SysMenuBar::default();
init_menu(&mut m);
let mut ed = text::TextEditor::default().with_id("ed");
ed.set_buffer(buf);
ed.set_linenumber_width(40);
ed.set_text_font(Font::Courier);
ed.set_trigger(CallbackTrigger::Changed);
ed.set_callback(editor_cb);
handle_drag_drop(&mut ed);
w.resizable(&col);
col.fixed(&m, 30);
col.end();
}
w.end();
w.show();
w.set_callback(win_cb);
a.run().unwrap();
}
sourcepub fn with<V: Clone, F: 'static + FnMut(&mut T) -> V>(&self, cb: F) -> V
pub fn with<V: Clone, F: 'static + FnMut(&mut T) -> V>(&self, cb: F) -> V
Examples found in repository?
examples/widget_id.rs (lines 31-34)
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fn increment_by(step: i32) {
let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
let state = app::GlobalState::<Counter>::get();
let count = state.with(move |c| {
c.count += step;
c.count
});
frame.set_label(&count.to_string());
}
// To pass a function object directly!
fn increment(_w: &mut impl WidgetExt) {
let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
let state = app::GlobalState::<Counter>::get();
let count = state.with(|c| {
c.count += 1;
c.count
});
frame.set_label(&count.to_string());
}
More examples
examples/editor.rs (lines 89-103)
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fn quit_cb() {
STATE.with(|s| {
if s.saved {
app::quit();
} else {
let c = dialog::choice2_default(
"Are you sure you want to exit without saving?",
"Yes",
"No",
"",
);
if c == Some(0) {
app::quit();
}
}
});
}
fn win_cb(_w: &mut window::Window) {
if app::event() == Event::Close {
quit_cb();
}
}
fn editor_cb(_e: &mut text::TextEditor) {
STATE.with(|s| s.saved = false);
}
fn handle_drag_drop(editor: &mut text::TextEditor) {
editor.handle({
let mut dnd = false;
let mut released = false;
let buf = editor.buffer().unwrap();
move |_, ev| match ev {
Event::DndEnter => {
dnd = true;
true
}
Event::DndDrag => true,
Event::DndRelease => {
released = true;
true
}
Event::Paste => {
if dnd && released {
let path = app::event_text();
let path = path.trim();
let path = path.replace("file://", "");
let path = std::path::PathBuf::from(&path);
if path.exists() {
// we use a timeout to avoid pasting the path into the buffer
app::add_timeout3(0.0, {
let mut buf = buf.clone();
move |_| match buf.load_file(&path) {
Ok(_) => (),
Err(e) => dialog::alert_default(&format!(
"An issue occured while loading the file: {e}"
)),
}
});
}
dnd = false;
released = false;
true
} else {
false
}
}
Event::DndLeave => {
dnd = false;
released = false;
true
}
_ => false,
}
});
}
fn menu_cb(m: &mut impl MenuExt) {
if let Ok(mpath) = m.item_pathname(None) {
let ed: text::TextEditor = app::widget_from_id("ed").unwrap();
match mpath.as_str() {
"&File/New...\t" => {
STATE.with(|s| {
if !s.buf.text().is_empty() {
let c = dialog::choice2_default(
"Are you sure you want to clear the buffer?",
"Yes",
"No",
"",
);
if c == Some(0) {
s.buf.set_text("");
s.saved = false;
}
}
});
}
"&File/Open...\t" => {
let c = nfc_get_file(dialog::NativeFileChooserType::BrowseFile);
if let Ok(text) = std::fs::read_to_string(&c) {
STATE.with(move |s| {
s.buf.set_text(&text);
s.saved = false;
s.current_file = c.clone();
});
}
}
"&File/Save\t" => {
STATE.with(|s| {
if !s.saved && s.current_file.exists() {
std::fs::write(&s.current_file, s.buf.text()).ok();
}
});
}
"&File/Save as...\t" => {
let c = nfc_get_file(dialog::NativeFileChooserType::BrowseSaveFile);
STATE.with(move |s| {
std::fs::write(&c, s.buf.text()).ok();
s.saved = true;
s.current_file = c.clone();
});
}
"&File/Quit\t" => quit_cb(),
"&Edit/Cut\t" => ed.cut(),
"&Edit/Copy\t" => ed.copy(),
"&Edit/Paste\t" => ed.paste(),
"&Help/About\t" => {
dialog::message_default("A minimal text editor written using fltk-rs!")
}
_ => unreachable!(),
}
}
}
sourcepub fn get() -> Self
pub fn get() -> Self
Gets the already initialized global state
Examples found in repository?
examples/widget_id.rs (line 30)
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fn increment_by(step: i32) {
let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
let state = app::GlobalState::<Counter>::get();
let count = state.with(move |c| {
c.count += step;
c.count
});
frame.set_label(&count.to_string());
}
// To pass a function object directly!
fn increment(_w: &mut impl WidgetExt) {
let mut frame: frame::Frame = app::widget_from_id("my_frame").unwrap();
let state = app::GlobalState::<Counter>::get();
let count = state.with(|c| {
c.count += 1;
c.count
});
frame.set_label(&count.to_string());
}
Trait Implementations§
impl<T: Copy + Send + Sync> Copy for GlobalState<T>
Auto Trait Implementations§
impl<T> RefUnwindSafe for GlobalState<T>where
T: RefUnwindSafe,
impl<T> Send for GlobalState<T>
impl<T> Sync for GlobalState<T>
impl<T> Unpin for GlobalState<T>where
T: Unpin,
impl<T> UnwindSafe for GlobalState<T>where
T: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more