Graph: Added new fill gradient option (#17528)

* Graph: Added new fill gradient option

* Graph: changed gradient area fill option, added test dashboard

devenv/dev-dashboards/panel-graph/graph-gradient-area-fills.json

@@ -0,0 +1,383 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "gnetId": null,
+  "graphTooltip": 0,
+  "links": [],
+  "panels": [
+    {
+      "aliasColors": {
+        "A-series": "rgb(48, 139, 237)"
+      },
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "fill": 1,
+      "fillGradient": 5,
+      "gridPos": {
+        "h": 8,
+        "w": 11,
+        "x": 0,
+        "y": 0
+      },
+      "id": 2,
+      "interval": "1m",
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 2,
+      "links": [],
+      "nullPointMode": "null",
+      "options": {},
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "refId": "A",
+          "scenarioId": "random_walk"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Req/s",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
+    {
+      "aliasColors": {
+        "A-series": "rgb(87, 186, 242)"
+      },
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "fill": 4,
+      "fillGradient": 4,
+      "gridPos": {
+        "h": 15,
+        "w": 13,
+        "x": 11,
+        "y": 0
+      },
+      "id": 11,
+      "interval": "1m",
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": true,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "links": [],
+      "nullPointMode": "null",
+      "options": {},
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "refId": "A",
+          "scenarioId": "random_walk"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Req/s",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
+    {
+      "aliasColors": {
+        "A-series": "red"
+      },
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "fill": 1,
+      "fillGradient": 5,
+      "gridPos": {
+        "h": 7,
+        "w": 11,
+        "x": 0,
+        "y": 8
+      },
+      "id": 7,
+      "interval": "1m",
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "links": [],
+      "nullPointMode": "null",
+      "options": {},
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "refId": "A",
+          "scenarioId": "random_walk"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Memory",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "decgbytes",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
+    {
+      "aliasColors": {
+        "A-series": "green"
+      },
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "fill": 2,
+      "fillGradient": 10,
+      "gridPos": {
+        "h": 8,
+        "w": 24,
+        "x": 0,
+        "y": 15
+      },
+      "id": 10,
+      "interval": "1m",
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 0,
+      "links": [],
+      "nullPointMode": "null",
+      "options": {},
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "refId": "A",
+          "scenarioId": "random_walk"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Req/s",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    }
+  ],
+  "schemaVersion": 18,
+  "style": "dark",
+  "tags": ["gdev", "panel-tests", "graph"],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {
+    "refresh_intervals": ["5s", "10s", "30s", "1m", "5m", "15m", "30m", "1h", "2h", "1d"],
+    "time_options": ["5m", "15m", "1h", "6h", "12h", "24h", "2d", "7d", "30d"]
+  },
+  "timezone": "",
+  "title": "Panel Tests - Graph - Gradient Area Fills",
+  "uid": "37Dq903mk",
+  "version": 25
+}

public/app/plugins/panel/graph/graph.ts

@@ -411,6 +411,7 @@ class GraphElement {
           show: panel.lines,
           zero: false,
           fill: this.translateFillOption(panel.fill),
+          fillColor: this.getFillGradient(panel.fillGradient),
           lineWidth: panel.dashes ? 0 : panel.linewidth,
           steps: panel.steppedLine,
         },
@@ -473,7 +474,17 @@ class GraphElement {
     }
   }
 
-  translateFillOption(fill) {
+  getFillGradient(amount: number) {
+    if (!amount) {
+      return null;
+    }
+
+    return {
+      colors: [{ opacity: 0.0 }, { opacity: amount / 10 }],
+    };
+  }
+
+  translateFillOption(fill: number) {
     if (this.panel.percentage && this.panel.stack) {
       return fill === 0 ? 0.001 : fill / 10;
     } else {

public/app/plugins/panel/graph/module.ts

@@ -69,6 +69,8 @@ class GraphCtrl extends MetricsPanelCtrl {
     lines: true,
     // fill factor
     fill: 1,
+    // fill factor
+    fillGradient: 0,
     // line width in pixels
     linewidth: 1,
     // show/hide dashed line

public/app/plugins/panel/graph/tab_display.html

@@ -37,6 +37,17 @@
         ></select>
       </div>
     </div>
+    <div class="gf-form" ng-if="ctrl.panel.lines && ctrl.panel.fill">
+      <label class="gf-form-label width-8">Fill Gradient</label>
+      <div class="gf-form-select-wrapper max-width-5">
+        <select
+          class="gf-form-input"
+          ng-model="ctrl.panel.fillGradient"
+          ng-options="f for f in [0,1,2,3,4,5,6,7,8,9,10]"
+          ng-change="ctrl.render()"
+        ></select>
+      </div>
+    </div>
     <div class="gf-form">
       <label class="gf-form-label width-8">Line Width</label>
       <div class="gf-form-select-wrapper max-width-5">