1 files changed, 64 insertions, 0 deletions
diff --git a/lib/systems/frequency_adjuster.js b/lib/systems/frequency_adjuster.js
new file mode 100644
index 0000000..6aa11d4
--- /dev/null
+++ b/lib/systems/frequency_adjuster.js
@@ -0,0 +1,64 @@
+import { System } from '@serpentity/serpentity';
+import Frequent from '../nodes/frequent';
+import { settingsContainer, slider } from '../factories/ui';
+
+const internals = {
+  symbols: {
+    a: '𝛼',
+    b: '𝛽',
+    c: '𝜁'
+  }
+};
+
+export default class FrequencyAdjuster extends System {
+
+  constructor(container) {
+
+    super();
+    this.container = container;
+  }
+
+  added(engine){
+
+    this.nodes = engine.getNodes(Frequent);
+    this.adjusterContainer = settingsContainer({
+      id: 'frequency-adjuster',
+      label: 'Frequency'
+    })
+
+    let i = 0;
+    for (const node of this.nodes) {
+      const nodeElement = settingsContainer({
+        id: `frequency-adjuster-${i}`,
+        label: `ɣ${i + 1}`,
+        level: 3
+      });
+
+      ['a', 'b', 'c'].forEach(key => {
+        nodeElement.appendChild(slider({
+          min: '0',
+          max: '1',
+          step: '0.01',
+          label: internals.symbols[key],
+          className: `frequency`,
+          get: () => node.frequency[key].toString(),
+          set: (value) => (node.frequency[key] = parseFloat(value))
+        }));
+      });
+
+      this.adjusterContainer.appendChild(nodeElement);
+      ++i;
+    }
+
+    this.container.appendChild(this.adjusterContainer);
+  }
+
+  removed(){
+
+    this.container.removeChild(this.adjusterContainer);
+    delete this.adjusterContainer;
+    delete this.nodes;
+  }
+
+  update(){}
+};