From 23f96c214b68021fd84bca3b16a27481189dd564 Mon Sep 17 00:00:00 2001
From: "Jasper v. Blanckenburg" <j.blanckenburg@fasttube.de>
Date: Sat, 28 Jan 2023 17:51:10 +0100
Subject: [PATCH] Zoom & scroll profile chart

---
 ui/main_window.qml | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/ui/main_window.qml b/ui/main_window.qml
index c8053c6..20c5ad3 100644
--- a/ui/main_window.qml
+++ b/ui/main_window.qml
@@ -30,15 +30,22 @@ ApplicationWindow {
 
         function onProfileChanged(data) {
             profile_handler.fill_series(profileSeries);
-            axisX.max = data[data.length - 1][0];
+            var x_max = data[data.length - 1][0];
+            axisX.max = x_max;
             axisX.applyNiceNumbers();
+            profileView.zoomReset();
         }
     }
 
     onProfileTimeChanged: {
+        var old_x = profileView.mapToPosition(currentTimeSeries.at(0)).x;
         currentTimeSeries.clear()
         currentTimeSeries.append(profileTime, 0)
         currentTimeSeries.append(profileTime, 100)
+        var new_x = profileView.mapToPosition(currentTimeSeries.at(0)).x;
+        if (new_x > profileView.plotArea.width / 2) {
+            profileView.scrollRight(new_x - old_x);
+        }
     }
 
     onBmsErrorChanged: {
@@ -63,6 +70,8 @@ ApplicationWindow {
                 }
             }
             ChartView {
+                id: profileView
+
                 Layout.fillWidth: true
                 Layout.fillHeight: true
                 Layout.minimumWidth: 400
@@ -97,6 +106,28 @@ ApplicationWindow {
                     visible: true
                 }
             }
+            RowLayout {
+                Button {
+                    text: "+"
+                    onClicked: {
+                        var r = Qt.rect(profileView.plotArea.x, profileView.plotArea.y, profileView.plotArea.width / 2, profileView.plotArea.height);
+                        profileView.zoomIn(r);
+                    }
+                }
+                Button {
+                    text: "-"
+                    onClicked: {
+                        var r = Qt.rect(profileView.plotArea.x, profileView.plotArea.y, profileView.plotArea.width * 2, profileView.plotArea.height);
+                        profileView.zoomIn(r);
+                    }
+                }
+                Button {
+                    text: "Reset zoom"
+                    onClicked: {
+                        profileView.zoomReset();
+                    }
+                }
+            }
             RowLayout {
                 Button {
                     objectName: "start_pause"