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QML Graph Component

A lightweight and customizable graph/chart UI component for Qt applications using QML and QtCharts. This component allows you to visualize real-time data efficiently.

📌 Features

  • 📈 Customizable line graph with color, scaling, and transparency options.
  • 🔄 Efficient real-time data updates using a circular buffer approach.
  • 🎨 Fully customizable UI, including axis visibility, colors, and margins.
  • ⚡ Optimized performance for smooth graph rendering.
  • 📉 Adjustable data range, including min/max values and blank spaces.

🚀 Getting Started

1️⃣ Add the QML File to Your Project

Copy the CustomGraph2.qml file into your Qt project.

2️⃣ Import Required Modules

Ensure you've added charts to the CMakeLists.txt find_package(...) and also added CustomGraph2.qml to qt_add_qml_module(...):

3️⃣ Use the Component in Your QML File

Add the CustomGraph2 to your QML project:

CustomGraph2 {
    id: myGraph
    width: 800
    height: 300
    graphColor: "#ff0000"  // Customize graph color
    maxPoints: 500         // Set maximum data points
    minValue: 0
    maxValue: 200
}

4️⃣ Add Data to the Graph

Dynamically update the graph by calling the addData() function:

myGraph.addData(150)  // Adds a new data point to the graph

📌 Example Use Cases

📊 Real-time data visualization (e.g., sensor readings, live signals, performance metrics).

📡 Network monitoring applications (e.g., bandwidth, latency graphs).

🏥 Medical devices displaying heart rate, pulse, or oxygen levels.