fix gradient values

Author: ada mandala

packages/perspective-viewer-datagrid/test/js/column_style.spec.js

@@ -128,6 +128,7 @@ test.describe("Column Style Tests", () => {
             await viewer.flush();
 
             // Count the events;
+            console.log(window.__events__);
             return window.__events__.length;
         });
 

rust/perspective-viewer/src/rust/components/column_settings_sidebar/style_tab.rs

@@ -204,19 +204,21 @@ pub fn StyleTab(p: &StyleTabProps) -> Html {
                 NumberColumnStyleDefaultConfig,
             >(&renderer, &column_name, ty)
             .map(|(config, default_config)| {
-                let on_change = Callback::from(move |config| {
-                    send_config(
-                        &renderer,
-                        &presentation,
-                        view.clone(),
-                        column_name.clone(),
-                        config,
-                    );
-                });
+                let on_change = {
+                    clone!(column_name, view);
+                    Callback::from(move |config| {
+                        send_config(
+                            &renderer,
+                            &presentation,
+                            view.clone(),
+                            column_name.clone(),
+                            config,
+                        );
+                    })};
                 html_template! {
                     <div class="item_title">{title.clone()}</div>
                     <div class="style_contents">
-                        <NumberColumnStyle  { config } {default_config} {on_change} />
+                        <NumberColumnStyle column_name={column_name.clone()} view={view.clone()}  { config } {default_config} {on_change} />
                     </div>
                 }
             }),

rust/perspective-viewer/src/rust/components/number_column_style.rs

@@ -22,6 +22,7 @@ use super::form::number_input::*;
 use super::modal::*;
 use super::style::LocalStyle;
 use crate::config::*;
+use crate::js::JsPerspectiveView;
 use crate::utils::WeakScope;
 use crate::*;
 
@@ -46,6 +47,7 @@ pub enum NumberColumnStyleMsg {
     NumberForeModeChanged(NumberForegroundMode),
     NumberBackModeChanged(NumberBackgroundMode),
     GradientChanged(Side, String),
+    DefaultGradientChanged(f64),
 }
 
 /// A `ColumnStyle` component is mounted to the window anchored at the screen
@@ -64,6 +66,9 @@ pub struct NumberColumnStyleProps {
 
     #[prop_or_default]
     pub weak_link: WeakScope<NumberColumnStyle>,
+
+    pub view: Option<JsValue>,
+    pub column_name: Option<String>,
 }
 
 impl ModalLink<NumberColumnStyle> for NumberColumnStyleProps {
@@ -102,6 +107,23 @@ impl Component for NumberColumnStyle {
 
     fn create(ctx: &Context<Self>) -> Self {
         ctx.set_modal_link();
+
+        if let Some(view) = ctx.props().view.clone() && let Some(column_name) = ctx.props().column_name.clone() {
+            ctx.link().send_future(async {
+                let view = view.unchecked_into::<JsPerspectiveView>();
+                let min_max = view._get_min_max(column_name.into()).await.unwrap();
+                let abs_max = min_max.unchecked_into::<js_sys::Array>()
+                    .to_vec()
+                    .iter()
+                    .map(|val| val.as_f64().unwrap())
+                    .fold(0.0, |accum, val| max!(accum, val.abs()));
+
+                let gradient_val = (abs_max * 100.).round() / 100.;
+
+                NumberColumnStyleMsg::DefaultGradientChanged(gradient_val)
+            });
+        }
+
         Self::reset(
             &ctx.props().config.clone().unwrap_or_default(),
             &ctx.props().default_config.clone(),
@@ -262,9 +284,17 @@ impl Component for NumberColumnStyle {
                     }
                 };
 
+                tracing::info!("Gradient changed!");
                 self.dispatch_config(ctx);
                 false
             }
+            NumberColumnStyleMsg::DefaultGradientChanged(gradient) => {
+                self.fg_gradient = gradient;
+                self.bg_gradient = gradient;
+                self.default_config.fg_gradient = gradient;
+                self.default_config.bg_gradient = gradient;
+                true
+            }
         }
     }
 
@@ -451,6 +481,7 @@ impl NumberColumnStyle {
     /// When this config has changed, we must signal the wrapper element.
     fn dispatch_config(&self, ctx: &Context<Self>) {
         let mut config = self.config.clone();
+        tracing::info!("Dispatching config! {config:?}");
         match &self.config {
             NumberColumnStyleConfig {
                 pos_fg_color: Some(pos_color),

rust/perspective-viewer/src/rust/js/perspective.rs

@@ -121,6 +121,9 @@ extern "C" {
     #[wasm_bindgen(method, catch, js_name = num_columns)]
     pub async fn _num_columns(this: &JsPerspectiveView) -> ApiResult<JsValue>;
 
+    #[wasm_bindgen(method, catch, js_name = get_min_max)]
+    pub async fn _get_min_max(this: &JsPerspectiveView, colname: js_sys::JsString) -> ApiResult<JsValue>;
+
     pub type JsPerspectiveViewConfig;
 
     pub type JsPerspectiveViewConfigUpdate;