update chart zoom in and out

CMakeLists.txt

@@ -15,7 +15,7 @@ find_package(Qt6 COMPONENTS
         Charts
         REQUIRED)
 
-add_executable(com main.cpp main_window.cpp main_window.h)
+add_executable(com main.cpp main_window.cpp main_window.h GChartView.cpp GChartView.h)
 #add_executable(untitled WIN32 main.cpp main_window.cpp main_window.h)
 target_link_libraries(com
         Qt::Core

GChartView.cpp

@@ -0,0 +1,83 @@
+//
+// Created by zong on 6/10/22.
+//
+
+// You may need to build the project (run Qt uic code generator) to get "ui_gchartview.h" resolved
+
+#include "GChartView.h"
+
+
+GChartView::GChartView(QWidget *parent) : QChartView(parent) {
+    data = new QLineSeries();
+    axis_x = new QValueAxis();
+    axis_y = new QValueAxis();
+    chart = new QChart();
+    chart->setTitle("WIP");
+    axis_x->setRange(0, 5);
+    axis_y->setRange(-2.5, 2.5);
+    axis_x->setTickType(QValueAxis::TickType::TicksDynamic);
+    axis_x->setTickInterval(1);
+    axis_x->setLabelFormat("%d");
+    axis_y->setTickCount(21);
+    chart->addAxis(axis_x, Qt::AlignBottom);
+    chart->addAxis(axis_y, Qt::AlignLeft);
+    chart->addSeries(data);
+    this->setChart(chart);
+    data->attachAxis(axis_x);
+    data->attachAxis(axis_y);
+}
+
+GChartView::~GChartView() {
+}
+
+void GChartView::wheelEvent(QWheelEvent *event) {
+    auto pixels = event->pixelDelta();
+    auto degrees = event->angleDelta();
+    auto cursor_y = event->position().y();
+    auto cur_range_max = axis_y->max();
+    auto cur_range_min = axis_y->min();
+
+    // left and top corner is origin
+    auto pos_max = chart->mapToPosition(QPointF(0, cur_range_min)).y();
+    auto pos_min = chart->mapToPosition(QPointF(0, cur_range_max)).y();
+    auto new_range = 5.0;
+    auto center = (qreal) 0.0;
+    if (cursor_y < pos_max && cursor_y > pos_min) {
+        center = chart->mapToValue(QPointF(0, cursor_y)).y();
+        auto cur_range = (cur_range_max - cur_range_min);
+        if (pixels.y() > 0)
+            new_range = cur_range * 0.8;
+        else
+            new_range = cur_range / 0.8;
+    }
+    // setup new axis
+    auto new_max = (center + new_range / 2.0);
+    auto new_min = (center - new_range / 2.0);
+    if (new_max > 2.5) {
+        new_min -= (new_max - 2.5);
+        new_max = 2.5;
+    }
+    if (new_min < -2.5) {
+        new_max += (-2.5 - new_min);
+        new_min = 2.5;
+        new_max = new_max > 2.5 ? 2.5 : new_max;
+    }
+
+    axis_y->setRange(new_min, new_max);
+    qDebug() << new_min << " " << new_max;
+
+
+}
+
+void GChartView::append(qreal x, qreal y) {
+    data->append(x, y);
+    while (data->count() > 5000) {
+        data->remove(0);
+    }
+    auto beg = data->at(0);
+    auto end = data->at(data->count());
+    if (end.x() > 5) {
+        axis_x->setRange(beg.x(), end.x());
+    }
+
+}

GChartView.h

@@ -0,0 +1,38 @@
+//
+// Created by zong on 6/10/22.
+//
+
+#ifndef COM_GCHARTVIEW_H
+#define COM_GCHARTVIEW_H
+
+#include <QChartView>
+
+#include <QLineSeries>
+#include <QValueAxis>
+#include <QChart>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class gchartview; }
+QT_END_NAMESPACE
+
+class GChartView : public QChartView {
+Q_OBJECT
+
+public:
+    explicit GChartView(QWidget *parent = nullptr);
+    ~GChartView() override;
+    void wheelEvent(QWheelEvent *even) override;
+
+private:
+    QLineSeries* data;
+    QValueAxis* axis_x;
+    QValueAxis* axis_y;
+    QChart* chart;
+public:
+
+    void append(qreal x, qreal y);
+
+};
+
+
+#endif //COM_GCHARTVIEW_H

main.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>1089</width>
+    <width>2028</width>
-    <height>943</height>
+    <height>1035</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -160,7 +160,7 @@
         </property>
        </widget>
       </widget>
-      <widget class="QChartView" name="plotChartView">
+      <widget class="GChartView" name="plotChartView">
        <property name="minimumSize">
         <size>
          <width>600</width>
@@ -177,7 +177,7 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>1089</width>
+     <width>2028</width>
      <height>31</height>
     </rect>
    </property>
@@ -186,9 +186,9 @@
  </widget>
  <customwidgets>
   <customwidget>
-   <class>QChartView</class>
+   <class>GChartView</class>
    <extends>QGraphicsView</extends>
-   <header>qchartview.h</header>
+   <header>GChartView.h</header>
   </customwidget>
  </customwidgets>
  <resources/>

main_window.cpp

@@ -42,8 +42,6 @@ void main_window::config_enable(bool ena) {
         receivefileStream.setDevice(&receivefile);
         rawDataFile.setFileName(filename + "raw");
         rawDataFile.open(QIODevice::Append);
-
-
     }
 
 }
@@ -69,35 +67,6 @@ void main_window::setUiComponent() {
 
     QObject::connect(portOpenBtn, SIGNAL(clicked()), this, SLOT(open_port()));
     QObject::connect(portUpdBtn, SIGNAL(clicked()), this, SLOT(update_ui_port()));
-    lineChart.chart->setTitle("WIP");
-    lineChart.axis_x->setRange(0, 5);
-    lineChart.axis_y->setRange(-2.5, 2.5);
-    lineChart.axis_x->setTickCount(11);
-    lineChart.axis_y->setTickCount(11);
-    lineChart.chart->addAxis(lineChart.axis_x, Qt::AlignBottom);
-    lineChart.chart->addAxis(lineChart.axis_y, Qt::AlignLeft);
-    lineChart.chart->addSeries(lineChart.data);
-    plotChartView->setChart(lineChart.chart);
-    lineChart.data->attachAxis(lineChart.axis_x);
-    lineChart.data->attachAxis(lineChart.axis_y);
-
-//    linedata = new QLineSeries();
-//    chart = new QChart();
-//    chart->setTitle("WIP");
-//    QValueAxis *axis_x = new QValueAxis();
-//    axis_x->setRange(0, 5);
-//    axis_x->setTickCount(11);
-//    QValueAxis *axis_y = new QValueAxis();
-//    axis_y->setRange(-2.5, 2.5);
-//    axis_y->setTickCount(11);
-//    chart->legend()->hide();
-//    chart->addAxis(axis_x, Qt::AlignBottom);
-//    chart->addAxis(axis_y, Qt::AlignLeft);
-//    chart->addSeries(linedata);
-//    plotChartView->setChart(chart);
-//    linedata->attachAxis(axis_x);
-//    linedata->attachAxis(axis_y);
-
 
 }
 
@@ -140,7 +109,7 @@ main_window::main_window(QWidget *parent) : QMainWindow(parent) {
 }
 
 main_window::~main_window() {
-//    delete ui;
+    delete ui;
 }
 
 void main_window::update_ui_port() {
@@ -154,7 +123,7 @@ void main_window::open_port() {
     if (port.isOpen()) {
         port.close();
         config_enable(true);
-        statusbar->showMessage("close port success");
+        statusbar->showMessage("close port success", 500);
         return;
     }
     if (portsComboBox->count() == 0) { return; }
@@ -166,7 +135,7 @@ void main_window::open_port() {
     else if (stopbits == QString("1.5")) port.setStopBits(QSerialPort::OneAndHalfStop);
     else if (stopbits == QString("2")) port.setStopBits(QSerialPort::TwoStop);
     else {
-        box.setText("wrong stopbits settings"), box.exec();
+        msgBox.setText("wrong stopbits settings"), msgBox.exec();
         return;
     }
     // TODO: read info from config
@@ -176,7 +145,7 @@ void main_window::open_port() {
     port.setFlowControl(QSerialPort::NoFlowControl);
     if (port.open(QIODevice::ReadWrite)) {
         config_enable(false);
-        statusbar->showMessage("open port success");
+        statusbar->showMessage("open port success", 500);
     } else {
         config_enable(true);
     }
@@ -190,7 +159,7 @@ bool first = true;
 
 
 void main_window::read_data() {
-    static int receive_num_cnt = 0;
+    static int receive_num_cnt = -2;
     static int receive_byte_cnt = 0;
     static int val = 0;
     auto data = port.readAll();
@@ -217,37 +186,38 @@ void main_window::read_data() {
         data = first_frame;
         first = false;
     }
+    // TODO: BUG int data overflow
     rawDataFile.write(data);
     for (int i = 0; i < data.size(); i++) {
         if (receive_byte_cnt % 4 == 0) {
             if (data[i] != 0) {
-                // TODO: raise error
+                msgBox.setText("Error occurred, please restart transmission.");
+                msgBox.exec();
                 return;
             }
             receive_num_cnt++;
+            if (receive_num_cnt == -1)
+                continue;
             int real_number = val;
             if (real_number & 0x800000) {
-                // negtive number
+                // negative number
                 real_number = -(~real_number & 0x7fffff + 1);
             }
             receivefileStream << real_number << " ";
             double scaled = (double) real_number / (double) (0x7fffff) * 2.5;
-            lineChart.data->append((double) receive_byte_cnt / 1000.0, scaled);
+            plotChartView->append ((double) receive_num_cnt / 1000.0, scaled);
-            while (lineChart.data->count() > 5000) {
-                // data more than 5000 second, remove first data
-                lineChart.data->remove(0);
-            }
             val = 0;
             continue;
         }
         val <<= 8;
         val |= data[i];
-        receive_byte_cnt++;
     }
     QString new_text = QString(data.toHex(' ').toUpper()) + " ";
     hexTextEdit->moveCursor(QTextCursor::End);
     hexTextEdit->insertPlainText(new_text);
     auto tmp = hexTextEdit->toPlainText();
+    asciiTextEdit->moveCursor(QTextCursor::End);
+    asciiTextEdit->insertPlainText(QString(data));
     if (tmp.length() > 1e3) {
         hexTextEdit->setPlainText(tmp.last((int) 1e3));
         hexTextEdit->moveCursor(QTextCursor::End);

main_window.h

@@ -14,18 +14,18 @@
 #include <QSplineSeries>
 #include <QValueAxis>
 
-typedef struct _Glinechart{
+//typedef struct _Glinechart{
-    QLineSeries* data;
+//    QLineSeries* data;
-    QValueAxis* axis_x;
+//    QValueAxis* axis_x;
-    QValueAxis* axis_y;
+//    QValueAxis* axis_y;
-    QChart* chart;
+//    QChart* chart;
-    _Glinechart() {
+//    _Glinechart() {
-        data = new QLineSeries();
+//        data = new QLineSeries();
-        axis_x = new QValueAxis();
+//        axis_x = new QValueAxis();
-        axis_y = new QValueAxis();
+//        axis_y = new QValueAxis();
-        chart = new QChart();
+//        chart = new QChart();
-    }
+//    }
-}GLineChart;
+//}GLineChart;
 
 class main_window : public QMainWindow {
 Q_OBJECT
@@ -62,10 +62,10 @@ private:
     QTextEdit *asciiTextEdit;
     QMenuBar *menubar;
     QStatusBar *statusbar;
-    QChartView *plotChartView;
+    GChartView *plotChartView;
 
-    QMessageBox box;
+    QMessageBox msgBox;
-    GLineChart lineChart;
+//    GLineChart lineChart;
 
 private:
     void setUiComponent();