Refactor JsonTreeStyle

README.md

@@ -28,16 +28,16 @@ JsonTree::new("simple-tree", &value).show(ui);
 
 // Customised:
 let response = JsonTree::new("customised-tree", &value)
-    .style(JsonTreeStyle {
-        visuals: Some(JsonTreeVisuals {
-            bool_color: Color32::YELLOW,
-            ..Default::default()
-        }),
-        ..Default::default()
-    })
+     .style(
+       JsonTreeStyle::new()
+           .abbreviate_root(true) // Show {...} when the root object is collapsed.
+           .toggle_buttons_state(ToggleButtonsState::VisibleDisabled)
+           .visuals(JsonTreeVisuals {
+               bool_color: Color32::YELLOW,
+               ..Default::default()
+           }),
+     )
     .default_expand(DefaultExpand::All)
-    .abbreviate_root(true) // Show {...} when the root object is collapsed.
-    .toggle_buttons_state(ToggleButtonsState::VisibleDisabled)
     .on_render(|ui, ctx| {
         // Customise rendering of the JsonTree, and/or handle interactions.
         match ctx {

examples/demo/src/apps/editor.rs

@@ -11,7 +11,7 @@ use egui_json_tree::{
         DefaultRender, RenderBaseValueContext, RenderContext, RenderExpandableDelimiterContext,
         RenderPropertyContext,
     },
-    DefaultExpand, JsonTree,
+    DefaultExpand, JsonTree, JsonTreeStyle,
 };
 use serde_json::Value;
 
@@ -437,8 +437,8 @@ impl Show for JsonEditorExample {
         ui.add_space(10.0);
 
         JsonTree::new(self.title(), &self.value)
-            .abbreviate_root(true)
             .default_expand(DefaultExpand::All)
+            .style(JsonTreeStyle::new().abbreviate_root(true))
             .on_render(|ui, context| self.editor.show(ui, &self.value, context))
             .show(ui);
 

examples/demo/src/apps/toggle_buttons.rs

@@ -1,5 +1,5 @@
 use egui::Ui;
-use egui_json_tree::{DefaultExpand, JsonTree, ToggleButtonsState};
+use egui_json_tree::{DefaultExpand, JsonTree, JsonTreeStyle, ToggleButtonsState};
 use serde_json::Value;
 
 use super::Show;
@@ -49,7 +49,7 @@ impl Show for ToggleButtonsCustomisationDemo {
 
             JsonTree::new(self.title(), &self.value)
                 .default_expand(DefaultExpand::All)
-                .toggle_buttons_state(self.toggle_buttons_state)
+                .style(JsonTreeStyle::new().toggle_buttons_state(self.toggle_buttons_state))
                 .show(ui);
         });
     }

src/lib.rs

@@ -23,16 +23,16 @@
 //!
 //! // Customised:
 //! let response = JsonTree::new("customised-tree", &value)
-//!     .style(JsonTreeStyle {
-//!       visuals: Some(JsonTreeVisuals {
-//!           bool_color: Color32::YELLOW,
-//!           ..Default::default()
-//!       }),
-//!       ..Default::default()
-//!     })
+//!     .style(
+//!       JsonTreeStyle::new()
+//!           .abbreviate_root(true) // Show {...} when the root object is collapsed.
+//!           .toggle_buttons_state(ToggleButtonsState::VisibleDisabled)
+//!           .visuals(JsonTreeVisuals {
+//!               bool_color: Color32::YELLOW,
+//!               ..Default::default()
+//!           }),
+//!     )
 //!     .default_expand(DefaultExpand::All)
-//!     .abbreviate_root(true) // Show {...} when the root object is collapsed.
-//!     .toggle_buttons_state(ToggleButtonsState::VisibleDisabled)
 //!     .on_render(|ui, ctx| {
 //!         // Customise rendering of the JsonTree, and/or handle interactions.
 //!         match ctx {

src/node.rs

@@ -45,9 +45,12 @@ impl<'a, T: ToJsonTreeValue> JsonTreeNode<'a, T> {
             persistent_id.with(tree_id.with(path_segments))
         };
 
+        let style = config.style.unwrap_or_default();
+        let default_expand = config.default_expand.unwrap_or_default();
+
         let mut path_id_map = HashMap::new();
 
-        let (default_expand, search_term) = match config.default_expand {
+        let (default_expand, search_term) = match default_expand {
             DefaultExpand::All => (InnerExpand::All, None),
             DefaultExpand::None => (InnerExpand::None, None),
             DefaultExpand::ToLevel(l) => (InnerExpand::ToLevel(l), None),
@@ -58,7 +61,7 @@ impl<'a, T: ToJsonTreeValue> JsonTreeNode<'a, T> {
                 let paths = search_term
                     .as_ref()
                     .map(|search_term| {
-                        search_term.find_matching_paths_in(self.value, config.abbreviate_root)
+                        search_term.find_matching_paths_in(self.value, style.abbreviate_root)
                     })
                     .unwrap_or_default();
                 (InnerExpand::Paths(paths), search_term)
@@ -69,17 +72,15 @@ impl<'a, T: ToJsonTreeValue> JsonTreeNode<'a, T> {
 
         let node_config = JsonTreeNodeConfig {
             default_expand,
-            abbreviate_root: config.abbreviate_root,
-            style: config.style,
+            style,
             search_term,
-            toggle_buttons_state: config.toggle_buttons_state,
         };
 
         // Wrap in a vertical layout in case this tree is placed directly in a horizontal layout,
         // which does not allow indent layouts as direct children.
         ui.vertical(|ui| {
             // Centres the collapsing header icon.
-            ui.spacing_mut().interact_size.y = node_config.style.font_id(ui).size;
+            ui.spacing_mut().interact_size.y = node_config.style.resolve_font_id(ui).size;
 
             self.show_impl(
                 ui,
@@ -176,10 +177,8 @@ fn show_expandable<'a, 'b, T: ToJsonTreeValue>(
 ) {
     let JsonTreeNodeConfig {
         default_expand,
-        abbreviate_root,
         style,
         search_term,
-        toggle_buttons_state,
     } = config;
 
     let delimiters = match expandable.expandable_type {
@@ -204,14 +203,14 @@ fn show_expandable<'a, 'b, T: ToJsonTreeValue>(
     let header_res = ui.horizontal_wrapped(|ui| {
         ui.spacing_mut().item_spacing.x = 0.0;
 
-        if let Some(enabled) = toggle_buttons_state.enabled() {
+        if let Some(enabled) = style.toggle_buttons_state.enabled() {
             ui.add_enabled_ui(enabled, |ui| {
                 state.show_toggle_button(ui, paint_default_icon)
             });
         }
 
         if path_segments.is_empty() && !is_expanded {
-            if *abbreviate_root {
+            if style.abbreviate_root {
                 renderer.render_expandable_delimiter(
                     ui,
                     RenderExpandableDelimiterContext {
@@ -381,7 +380,7 @@ fn show_expandable<'a, 'b, T: ToJsonTreeValue>(
         }
     });
 
-    let toggle_buttons_hidden = *toggle_buttons_state == ToggleButtonsState::Hidden;
+    let toggle_buttons_hidden = style.toggle_buttons_state == ToggleButtonsState::Hidden;
     if toggle_buttons_hidden {
         ui.visuals_mut().indent_has_left_vline = true;
         ui.spacing_mut().indent = (ui.spacing().icon_width + ui.spacing().icon_spacing) / 2.0;
@@ -450,10 +449,8 @@ fn show_expandable<'a, 'b, T: ToJsonTreeValue>(
 
 struct JsonTreeNodeConfig<'a> {
     default_expand: InnerExpand<'a>,
-    abbreviate_root: bool,
     style: JsonTreeStyle,
     search_term: Option<SearchTerm>,
-    toggle_buttons_state: ToggleButtonsState,
 }
 
 #[derive(Debug, Clone)]

src/render.rs

@@ -279,11 +279,11 @@ fn render_value(
 ) -> Response {
     let job = ui.ctx().memory_mut(|mem| {
         mem.caches.cache::<ValueLayoutJobCreatorCache>().get((
-            style.visuals(ui),
+            style.resolve_visuals(ui),
             value_str,
             value_type,
             search_term,
-            &style.font_id(ui),
+            &style.resolve_font_id(ui),
         ))
     });
 
@@ -356,10 +356,10 @@ fn render_property(
 ) -> Response {
     let job = ui.ctx().memory_mut(|mem| {
         mem.caches.cache::<PropertyLayoutJobCreatorCache>().get((
-            style.visuals(ui),
+            style.resolve_visuals(ui),
             property,
             search_term,
-            &style.font_id(ui),
+            &style.resolve_font_id(ui),
         ))
     });
 
@@ -442,9 +442,9 @@ fn render_delimiter(ui: &mut Ui, style: &JsonTreeStyle, delimiter_str: &str) ->
     append(
         &mut job,
         delimiter_str,
-        style.visuals(ui).punctuation_color,
+        style.resolve_visuals(ui).punctuation_color,
         None,
-        &style.font_id(ui),
+        &style.resolve_font_id(ui),
     );
     render_job(ui, job)
 }

src/style.rs

@@ -1,19 +1,54 @@
 use egui::{Color32, FontId, TextStyle, Ui};
 
-use crate::value::BaseValueType;
+use crate::{value::BaseValueType, ToggleButtonsState};
 
 /// Styling configuration to control the appearance of the [`JsonTree`](crate::JsonTree).
 #[derive(Debug, Clone, Hash, Default)]
 pub struct JsonTreeStyle {
-    /// The colors to use. If not set, defaults to either a dark or light color scheme, depending on [`egui::Visuals::dark_mode`].
     pub visuals: Option<JsonTreeVisuals>,
-    /// The font to use. If not set, defaults to `TextStyle::Monospace.resolve(ui.style())`.
     pub font_id: Option<FontId>,
+    pub abbreviate_root: bool,
+    pub toggle_buttons_state: ToggleButtonsState,
 }
 
 impl JsonTreeStyle {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// The colors to use. Defaults to either a dark or light color scheme, depending on [`egui::Visuals::dark_mode`].
+    pub fn visuals(mut self, visuals: JsonTreeVisuals) -> Self {
+        self.visuals = Some(visuals);
+        self
+    }
+
+    /// The font to use. Defaults to `TextStyle::Monospace.resolve(ui.style())`.
+    pub fn font_id(mut self, font_id: FontId) -> Self {
+        self.font_id = Some(font_id);
+        self
+    }
+
+    /// Override whether a root array/object should show direct child elements when collapsed.
+    ///
+    /// If `true`, a collapsed root object would render as: `{...}`.
+    ///
+    /// If `false`, a collapsed root object would render as: `{ "foo": "bar", "baz": {...} }`.
+    ///
+    /// Defaults to `false`.
+    pub fn abbreviate_root(mut self, abbreviate_root: bool) -> Self {
+        self.abbreviate_root = abbreviate_root;
+        self
+    }
+
+    /// Override the visibility and interactivity of the toggle buttons for expanding/collapsing objects and arrays.
+    /// Defaults to [`ToggleButtonsState::VisibleEnabled`].
+    pub fn toggle_buttons_state(mut self, toggle_buttons_state: ToggleButtonsState) -> Self {
+        self.toggle_buttons_state = toggle_buttons_state;
+        self
+    }
+
     /// Resolves the [`JsonTreeVisuals`] color scheme to use.
-    pub fn visuals(&self, ui: &Ui) -> &JsonTreeVisuals {
+    pub(crate) fn resolve_visuals(&self, ui: &Ui) -> &JsonTreeVisuals {
         if let Some(visuals) = &self.visuals {
             visuals
         } else if ui.visuals().dark_mode {
@@ -23,7 +58,8 @@ impl JsonTreeStyle {
         }
     }
 
-    pub(crate) fn font_id(&self, ui: &Ui) -> FontId {
+    /// Resolves the [`FontId`] to use.
+    pub(crate) fn resolve_font_id(&self, ui: &Ui) -> FontId {
         if let Some(font_id) = &self.font_id {
             font_id.clone()
         } else {

src/toggle_buttons_state.rs

@@ -1,5 +1,5 @@
 /// Setting for the visibility and interactivity of the toggle buttons for expanding/collapsing objects and arrays.
-#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Hash)]
 pub enum ToggleButtonsState {
     #[default]
     VisibleEnabled,

src/tree.rs

@@ -2,27 +2,23 @@ use crate::{
     node::JsonTreeNode,
     render::{JsonTreeRenderer, RenderContext},
     value::ToJsonTreeValue,
-    DefaultExpand, JsonTreeResponse, JsonTreeStyle, ToggleButtonsState,
+    DefaultExpand, JsonTreeResponse, JsonTreeStyle,
 };
 use egui::{Id, Ui};
 use std::hash::Hash;
 
 pub(crate) struct JsonTreeConfig<'a, T: ToJsonTreeValue> {
-    pub(crate) style: JsonTreeStyle,
-    pub(crate) default_expand: DefaultExpand<'a>,
-    pub(crate) abbreviate_root: bool,
+    pub(crate) style: Option<JsonTreeStyle>,
+    pub(crate) default_expand: Option<DefaultExpand<'a>>,
     pub(crate) renderer: JsonTreeRenderer<'a, T>,
-    pub(crate) toggle_buttons_state: ToggleButtonsState,
 }
 
 impl<'a, T: ToJsonTreeValue> Default for JsonTreeConfig<'a, T> {
     fn default() -> Self {
         Self {
             style: Default::default(),
             default_expand: Default::default(),
-            abbreviate_root: Default::default(),
             renderer: Default::default(),
-            toggle_buttons_state: Default::default(),
         }
     }
 }
@@ -48,13 +44,13 @@ impl<'a, T: ToJsonTreeValue> JsonTree<'a, T> {
 
     /// Override colors for JSON syntax highlighting, and search match highlighting.
     pub fn style(mut self, style: JsonTreeStyle) -> Self {
-        self.config.style = style;
+        self.config.style = Some(style);
         self
     }
 
     /// Override how the [`JsonTree`] expands arrays/objects by default.
     pub fn default_expand(mut self, default_expand: DefaultExpand<'a>) -> Self {
-        self.config.default_expand = default_expand;
+        self.config.default_expand = Some(default_expand);
         self
     }
 
@@ -97,22 +93,6 @@ impl<'a, T: ToJsonTreeValue> JsonTree<'a, T> {
         self
     }
 
-    /// Override whether a root array/object should show direct child elements when collapsed.
-    ///
-    /// If called with `true`, a collapsed root object would render as: `{...}`.
-    ///
-    /// Otherwise, a collapsed root object would render as: `{ "foo": "bar", "baz": {...} }`.
-    pub fn abbreviate_root(mut self, abbreviate_root: bool) -> Self {
-        self.config.abbreviate_root = abbreviate_root;
-        self
-    }
-
-    /// Override the visibility and interactivity of the toggle buttons for expanding/collapsing objects and arrays.
-    pub fn toggle_buttons_state(mut self, toggle_buttons_state: ToggleButtonsState) -> Self {
-        self.config.toggle_buttons_state = toggle_buttons_state;
-        self
-    }
-
     /// Show the JSON tree visualisation within the `Ui`.
     pub fn show(self, ui: &mut Ui) -> JsonTreeResponse {
         JsonTreeNode::new(self.id, self.value).show_with_config(ui, self.config)

tests/json_tree_test.rs

@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use egui::{mutex::Mutex, CentralPanel, Context, FontDefinitions, Style};
-use egui_json_tree::{render::RenderContext, DefaultExpand, JsonTree};
+use egui_json_tree::{render::RenderContext, DefaultExpand, JsonTree, JsonTreeStyle};
 #[cfg(feature = "serde_json")]
 use serde_json::{json, Value};
 
@@ -541,7 +541,7 @@ fn json_tree_reset_expanded() {
         CentralPanel::default().show(ctx, |ui| {
             JsonTree::new(id, &value)
                 .default_expand(DefaultExpand::All)
-                .abbreviate_root(true)
+                .style(JsonTreeStyle::new().abbreviate_root(true))
                 .on_render(|_, render_ctx| {
                     actual.push(render_ctx.into());
                 })
@@ -561,7 +561,7 @@ fn json_tree_reset_expanded() {
         CentralPanel::default().show(ctx, |ui| {
             JsonTree::new(id, &value)
                 .default_expand(DefaultExpand::None)
-                .abbreviate_root(true)
+                .style(JsonTreeStyle::new().abbreviate_root(true))
                 .on_render(|_, render_ctx| {
                     actual.push(render_ctx.into());
                 })
@@ -581,7 +581,7 @@ fn json_tree_reset_expanded() {
         CentralPanel::default().show(ctx, |ui| {
             JsonTree::new(id, &value)
                 .default_expand(DefaultExpand::None)
-                .abbreviate_root(true)
+                .style(JsonTreeStyle::new().abbreviate_root(true))
                 .on_render(|_, render_ctx| {
                     actual.push(render_ctx.into());
                 })