104 lines
3.0 KiB
Rust
104 lines
3.0 KiB
Rust
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//! Persistence example with a runnable UI:
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//! `cargo run --example 4_persistence`
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use eframe::egui;
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use grimdock::{
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ChildSide, DropPolicy, PaneBuilder, PaneOptions, PanelContext, PanelStyle, PanelTree,
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PersistedPanelTree, SplitDir, Tab,
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};
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fn main() -> eframe::Result<()> {
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let options = eframe::NativeOptions {
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viewport: egui::ViewportBuilder::default()
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.with_title("grimdock 4_persistence")
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.with_inner_size([960.0, 600.0]),
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..Default::default()
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};
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eframe::run_native(
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"grimdock 4_persistence",
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options,
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Box::new(|_cc| Ok(Box::new(App::new()))),
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)
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}
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struct App {
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tree: PanelTree<&'static str>,
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saved: Option<PersistedPanelTree<&'static str>>,
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style: PanelStyle,
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}
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impl App {
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fn new() -> Self {
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Self {
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tree: make_tree(),
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saved: None,
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style: PanelStyle::default(),
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}
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}
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}
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impl eframe::App for App {
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fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
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egui::Panel::top("controls").show(ctx, |ui| {
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ui.horizontal(|ui| {
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if ui.button("Save layout").clicked() {
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self.saved = Some(self.tree.to_persisted());
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}
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if ui.button("Restore saved layout").clicked() {
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if let Some(saved) = self.saved.clone() {
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self.tree =
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PanelTree::from_persisted(saved).expect("saved layout should restore");
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}
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}
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if ui.button("Reset demo layout").clicked() {
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self.tree = make_tree();
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}
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});
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if let Some(saved) = &self.saved {
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ui.label(format!(
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"Saved version {} with {} persisted nodes",
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saved.version,
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saved.nodes.len()
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));
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} else {
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ui.label("No saved layout yet.");
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}
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});
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egui::CentralPanel::default()
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.frame(egui::Frame::NONE)
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.show(ctx, |ui| {
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PanelContext::new(ui, &mut self.tree, &self.style).show(|ui, tab_id| {
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ui.heading(*tab_id);
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ui.label("Drag tabs, resize panes, then press Save layout.");
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ui.label("Restore saved layout to rebuild the tree from the persisted format.");
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});
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});
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}
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}
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fn make_tree() -> PanelTree<&'static str> {
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let mut options = PaneOptions::default();
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options.drop_policy = DropPolicy::merge_only();
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options.allow_resize = false;
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let mut tree = PanelTree::from_pane(
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PaneBuilder::new(Tab::new("editor", "editor").with_leading_visual(">"))
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.push_tab(Tab::new("search", "search").with_leading_visual("?"))
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.with_options(options),
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);
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tree.split_leaf(
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0,
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SplitDir::Vertical,
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Tab::new("terminal", "terminal").with_leading_visual("$"),
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ChildSide::Second,
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);
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tree
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}
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