render and sort

public/app/plugins/panel/gauge/Thresholds.tsx

@@ -5,6 +5,7 @@ import { Label } from '../../../core/components/Label/Label';
 
 interface State {
   thresholds: Threshold[];
+  userAddedThresholds: number;
 }
 
 export default class Thresholds extends PureComponent<PanelOptionsProps<OptionsProps>, State> {
@@ -13,21 +14,34 @@ export default class Thresholds extends PureComponent<PanelOptionsProps<OptionsP
 
     this.state = {
       thresholds: this.props.options.thresholds || [
-        { label: 'Min', value: 0, canRemove: false },
-        { label: 'Max', value: 100, canRemove: false },
+        { index: 0, label: 'Min', value: 0, canRemove: false },
+        { index: 1, label: 'Max', value: 100, canRemove: false },
       ],
+      userAddedThresholds: 0,
     };
   }
 
-  onAddThreshold = () => {
-    this.setState(prevState => ({
-      thresholds: [...prevState.thresholds, { label: 'T1', value: 0, canRemove: true }],
-    }));
+  onAddThreshold = index => {
+    const newThresholds = this.state.thresholds.map(threshold => {
+      if (threshold.index >= index) {
+        threshold = { ...threshold, index: threshold.index + 1 };
+      }
+
+      return threshold;
+    });
+
+    const userAddedThresholds = this.state.userAddedThresholds + 1;
+
+    this.setState({
+      thresholds: this.sortThresholds([...newThresholds, { index: index, label: '', value: 0, canRemove: true }]),
+      userAddedThresholds: userAddedThresholds,
+    });
   };
 
   onRemoveThreshold = threshold => {
     this.setState(prevState => ({
       thresholds: prevState.thresholds.filter(t => t !== threshold),
+      userAddedThresholds: prevState.userAddedThresholds - 1,
     }));
   };
 
@@ -45,36 +59,148 @@ export default class Thresholds extends PureComponent<PanelOptionsProps<OptionsP
     });
   };
 
-  onChangeThresholdLabel = (event, threshold) => {
-    const newThresholds = this.state.thresholds.map(currentThreshold => {
-      if (currentThreshold === threshold) {
-        currentThreshold = { ...currentThreshold, label: event.target.value };
-      }
-
-      return currentThreshold;
-    });
-
-    this.setState({
-      thresholds: newThresholds,
-    });
-  };
-
   onBlur = () => {
-    this.sortThresholds();
+    this.setState(prevState => ({
+      thresholds: this.sortThresholds(prevState.thresholds),
+    }));
 
     this.props.onChange({ ...this.props.options, thresholds: this.state.thresholds });
   };
 
-  sortThresholds = () => {
-    console.log('sort');
-    this.setState(prevState => ({
-      thresholds: prevState.thresholds.sort((t1, t2) => t1.value - t2.value),
-    }));
+  sortThresholds = thresholds => {
+    return thresholds.sort((t1, t2) => {
+      return t1.index - t2.index;
+    });
   };
 
-  render() {
+  getIndicatorColor(index) {
+    const { userAddedThresholds } = this.state;
+
+    if (index === 0) {
+      return 'green';
+    } else if (index < userAddedThresholds) {
+      return 'yellow';
+    }
+
+    return 'red';
+  }
+
+  renderNoThresholds() {
     const { thresholds } = this.state;
 
+    return [
+      <div className="gf-form" key="min">
+        <input
+          className="gf-form-input"
+          onBlur={this.onBlur}
+          onChange={event => this.onChangeThresholdValue(event, thresholds[0])}
+          value={thresholds[0].value}
+        />
+        <Label width={3}>{thresholds[0].label}</Label>
+      </div>,
+      <div className="gf-form" key="add">
+        <div
+          onClick={() => this.onAddThreshold(1)}
+          style={{
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            width: '36px',
+            height: '36px',
+            backgroundColor: 'green',
+          }}
+        >
+          <i className="fa fa-plus" />
+        </div>
+        <Label width={18}>Add new threshold by clicking the line</Label>
+      </div>,
+      <div className="gf-form" key="max">
+        <input
+          className="gf-form-input"
+          onBlur={this.onBlur}
+          onChange={event => this.onChangeThresholdValue(event, thresholds[1])}
+          value={thresholds[1].value}
+        />
+        <Label width={3}>{thresholds[0].label}</Label>
+      </div>,
+    ];
+  }
+
+  renderThresholds() {
+    const { thresholds } = this.state;
+    return thresholds.map((threshold, index) => {
+      return (
+        <div className="gf-form" key={`${threshold}-${index}`}>
+          <input
+            className="gf-form-input"
+            type="text"
+            onChange={event => this.onChangeThresholdValue(event, threshold)}
+            value={threshold.value}
+            onBlur={this.onBlur}
+          />
+          {threshold.canRemove ? (
+            <div
+              onClick={() => this.onRemoveThreshold(threshold)}
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                width: '36px',
+                height: '36px',
+              }}
+            >
+              <i className="fa fa-times" />
+            </div>
+          ) : (
+            <Label width={3}>{threshold.label}</Label>
+          )}
+        </div>
+      );
+    });
+  }
+
+  insertAtIndex(index) {
+    const { userAddedThresholds } = this.state;
+
+    if (userAddedThresholds === 0) {
+      return 1;
+    } else if (index === userAddedThresholds) {
+      return index - 1;
+    } else if (index > 0) {
+      return index + 1;
+    }
+
+    return -1;
+  }
+
+  renderIndicator() {
+    const { userAddedThresholds } = this.state;
+
+    const indicators = userAddedThresholds + 1;
+
+    const sections = [];
+
+    for (let i = 0; i < indicators; i++) {
+      sections.push(
+        <div
+          key={`${i}`}
+          onClick={() => this.onAddThreshold(this.insertAtIndex(i))}
+          style={{
+            width: '100%',
+            height: `calc(100%/${indicators})`,
+            cursor: 'pointer',
+            background: this.getIndicatorColor(i),
+          }}
+        />
+      );
+    }
+
+    return sections;
+  }
+
+  render() {
+    const { userAddedThresholds } = this.state;
+
     return (
       <div className="section gf-form-group">
         <h5 className="page-heading">Thresholds</h5>
@@ -84,44 +210,12 @@ export default class Thresholds extends PureComponent<PanelOptionsProps<OptionsP
               width: '20px',
               minHeight: '40px',
               flex: '0 1 auto',
-              background: 'linear-gradient(to bottom, green, red)',
             }}
-          />
-          <div style={{ flex: '1 0 auto' }}>
-            {thresholds.map((threshold, index) => {
-              return (
-                <div className="gf-form" key={`${threshold}-${index}`}>
-                  {!threshold.canRemove ? (
-                    <Label width={5}>{threshold.label}</Label>
-                  ) : (
-                    <input
-                      className="gf-form-input width-7"
-                      onBlur={this.onBlur}
-                      onChange={event => this.onChangeThresholdLabel(event, threshold)}
-                      value={threshold.label}
-                    />
-                  )}
-                  <input
-                    className="gf-form-input"
-                    type="text"
-                    value={threshold.value}
-                    onChange={event => this.onChangeThresholdValue(event, threshold)}
-                    onBlur={this.onBlur}
-                  />
-                  {threshold.canRemove && (
-                    <span onClick={() => this.onRemoveThreshold(threshold)}>
-                      <i className="fa fa-remove" />
-                    </span>
-                  )}
-                </div>
-              );
-            })}
-            <div className="gf-form">
-              <Label width={5}>Add</Label>
-              <span className="gf-form-input" onClick={this.onAddThreshold}>
-                +
-              </span>
-            </div>
+          >
+            {this.renderIndicator()}
+          </div>
+          <div style={{ flex: '1 0 auto', marginLeft: '10px' }}>
+            {userAddedThresholds === 0 ? this.renderNoThresholds() : this.renderThresholds()}
           </div>
         </div>
       </div>

public/app/types/panel.ts

@@ -30,6 +30,7 @@ export interface PanelMenuItem {
 }
 
 export interface Threshold {
+  index: number;
   label: string;
   value: number;
   color?: string;

public/sass/_grafana.scss

@@ -103,6 +103,7 @@
 @import 'components/add_data_source.scss';
 @import 'components/page_loader';
 @import 'components/unit-picker';
+@import 'components/thresholds';
 
 // PAGES
 @import 'pages/login';

public/sass/components/_thresholds.scss

@@ -0,0 +1 @@
+