1 files changed, 46 insertions, 0 deletions
diff --git a/client/lib/ui.js b/client/lib/ui.js
new file mode 100644
index 0000000..f344f0e
--- /dev/null
+++ b/client/lib/ui.js
@@ -0,0 +1,46 @@
+/* ui - update an int/float value */
+
+export function update_value_on_change(el, id, is_int, fn) {
+  const label = document.querySelector(id + ' + .val')
+  const update = v => {
+    label.innerHTML = is_int ? parseInt(v) : v.toFixed(2)
+    fn && fn(v)
+  }
+  el.on('change', update)
+  update(el.value)
+  el.update = update
+}
+
+/* ui - update a radio button */
+
+export function update_radio_value_on_change(el, id, values, fn) {
+  let old_v = el.active
+  const label = document.querySelector(id + ' + .val')
+  const update = v => {
+    if (v === -1) {
+      v = el.active = old_v
+    } else {
+      old_v = v
+    }
+    label.innerHTML = values[v][1]
+    fn && fn(v)
+  }
+  el.on('change', update)
+  update(el.active)
+  el.update = update
+}
+
+/* ui - bind/build a select dropdown */
+
+export function build_options(el, lists, fn) {
+  Object.keys(lists).forEach(key => {
+    const list = lists[key]
+    const option = document.createElement('option')
+    option.innerHTML = list.name
+    option.value = key
+    el.appendChild(option)
+  })
+  el.addEventListener('input', function(e){
+    fn(e.target.value)
+  })
+}