From 4f1a91fd3eb040e3473e8c49d89d24b8a3bc1102 Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Tue, 25 Nov 2025 18:41:44 +0100
Subject: [PATCH] Add controller 30sec history graph

---
 evcharger-app/CMakeLists.txt              |   3 +-
 evcharger-app/qml/DeviceListScreen.qml    |   2 +-
 evcharger-app/qml/InformationsTabPage.qml | 142 ++++++++++++++++++----
 3 files changed, 123 insertions(+), 24 deletions(-)

diff --git a/evcharger-app/CMakeLists.txt b/evcharger-app/CMakeLists.txt
index 838e8e8..e6281e1 100644
--- a/evcharger-app/CMakeLists.txt
+++ b/evcharger-app/CMakeLists.txt
@@ -1,4 +1,4 @@
-find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Quick WebSockets LinguistTools)
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Quick WebSockets LinguistTools Charts)
 
 qt_standard_project_setup(REQUIRES 6.6 I18N_TRANSLATED_LANGUAGES de)
 
@@ -155,6 +155,7 @@ target_link_libraries(evcharger-app PUBLIC
     Qt6::Widgets
     Qt6::Quick
     Qt6::WebSockets
+    Qt6::Charts
     qmsgpack
     QtZeroConf
     goecommon
diff --git a/evcharger-app/qml/DeviceListScreen.qml b/evcharger-app/qml/DeviceListScreen.qml
index 2316d20..9f1a68e 100644
--- a/evcharger-app/qml/DeviceListScreen.qml
+++ b/evcharger-app/qml/DeviceListScreen.qml
@@ -281,7 +281,7 @@ BaseNavigationPage {
         font.bold: true
 
         highlighted: true
-        Material.accent: Material.Blue
+        //Material.accent: Material.Blue
 
         display: listView.contentY < 20 ? AbstractButton.TextBesideIcon : AbstractButton.IconOnly
 
diff --git a/evcharger-app/qml/InformationsTabPage.qml b/evcharger-app/qml/InformationsTabPage.qml
index 66102f1..0730f44 100644
--- a/evcharger-app/qml/InformationsTabPage.qml
+++ b/evcharger-app/qml/InformationsTabPage.qml
@@ -15,6 +15,126 @@ ScrollableTabPage {
         text: qsTr("Informations")
     }
 
+    ChartView {
+        visible: categoryPowers.exists
+
+        ApiKeyValueHelper {
+            id: categoryNames
+            deviceConnection: theDeviceConnection
+            apiKey: "ccn"
+        }
+
+        ApiKeyValueHelper {
+            id: categoryPowers
+            deviceConnection: theDeviceConnection
+            apiKey: "ccp"
+            onValueChanged: {
+                const t = new Date();
+
+                const doit = function(category, value) {
+                    category.append(t, value)
+                    if (value)
+                        category.visible = true
+                };
+
+                doit(category0, value[0])
+                doit(category1, value[1])
+                doit(category2, value[2])
+                doit(category3, value[3])
+                doit(category4, value[4])
+
+                // --- X axis range (last 30 seconds) ---
+                const now = new Date()                    // current time as Date
+                axisX.min = new Date(now.getTime() - 30*1000)   // 30 sec ago
+                axisX.max = now
+
+                // --- Y axis auto-range ---
+                let minY = Number.POSITIVE_INFINITY
+                let maxY = Number.NEGATIVE_INFINITY
+
+                for (let s of [category0, category1, category2, category3, category4]) {
+                    if (!s.visible)
+                        continue
+                    const c = s.count
+                    if (c === 0) continue
+
+                    for (let i = 0; i < c; ++i) {
+                        const y = s.at(i).y
+                        if (y < minY) minY = y
+                        if (y > maxY) maxY = y
+                    }
+                }
+
+                // fallback if no data
+                if (!isFinite(minY)) {
+                    minY = 0
+                    maxY = 1
+                }
+
+                // add 10% padding
+                const d = (maxY - minY) * 0.1
+                axisY.min = minY - d
+                axisY.max = maxY + d
+            }
+        }
+
+        title: "Category Powers 30sec"
+        Layout.fillWidth: true
+        Layout.preferredHeight: 300
+        antialiasing: true
+
+        DateTimeAxis {
+            id: axisX
+            format: "hh:mm:ss"
+            tickCount: 5
+        }
+
+        ValueAxis {
+            id: axisY
+            tickCount: 6
+        }
+
+        LineSeries {
+            id: category0
+            name: categoryNames.value[0]
+            axisX: axisX
+            axisY: axisY
+            visible: false
+        }
+
+        LineSeries {
+            id: category1
+            name: categoryNames.value[1]
+            axisX: axisX
+            axisY: axisY
+            visible: false
+        }
+
+        LineSeries {
+            id: category2
+            name: categoryNames.value[2]
+            axisX: axisX
+            axisY: axisY
+            visible: false
+        }
+
+        LineSeries {
+            id: category3
+            name: categoryNames.value[3]
+            axisX: axisX
+            axisY: axisY
+            visible: false
+        }
+
+        LineSeries {
+            id: category4
+            name: categoryNames.value[4]
+            axisX: axisX
+            axisY: axisY
+            visible: false
+        }
+    }
+
     Text {
         id: statusText
         text: qsTr("Idle")
@@ -86,28 +206,6 @@ ScrollableTabPage {
         }
     }
 
-    Repeater {
-        model: 5
-
-        ChartView {
-            title: "Line"
-            Layout.fillWidth: true
-            Layout.preferredHeight: page.height * 0.75
-            antialiasing: true
-
-            LineSeries {
-                name: "LineSeries"
-                XYPoint { x: 0; y: 0 }
-                XYPoint { x: 1.1; y: 2.1 }
-                XYPoint { x: 1.9; y: 3.3 }
-                XYPoint { x: 2.1; y: 2.1 }
-                XYPoint { x: 2.9; y: 4.9 }
-                XYPoint { x: 3.4; y: 3.0 }
-                XYPoint { x: 4.1; y: 3.3 }
-            }
-        }
-    }
-
     OpenLinkButton {
         ApiKeyValueHelper {
             id: downloadsLink