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C# chart绘图鼠标响应

news 2025/9/11 4:26:38

1、图形自动滚动设置

chart1.ChartAreas[0].AxisX.Maximum 横坐标显示区域最大值

chart1.ChartAreas[0].AxisX.Minimum 横坐标显示区域最小值

显示宽度 = chart1.ChartAreas[0].AxisX.Maximum - chart1.ChartAreas[0].AxisX.Minimum

            chart1.ChartAreas[0].AxisX.Maximum = x_data;if (x_data > AaxisXScrollNum){chart1.ChartAreas[0].AxisX.Minimum = x_data - AaxisXScrollNum;}else{chart1.ChartAreas[0].AxisX.Minimum = 0;}

2、图形移动

chart1.ChartAreas[0].AxisX.ScaleView.Position X轴相对于起始点被移动的距离

chart1.ChartAreas[0].AxisY.ScaleView.Position Y轴相对于起始点被移动的距离

3、图表缩放

chart1.ChartAreas[0].AxisX.ScaleView.Size X轴在原基础上的缩放比列

chart1.ChartAreas[0].AxisX.ScaleView.Size Y轴在原基础上的缩放比列

4、坐标轴显示格式

chart1.ChartAreas[0].AxisX.LabelStyle.Format = "N1"; //限制X轴标签显示浮点数一位小数
chart1.ChartAreas[0].AxisY.LabelStyle.Format = "N1"; //限制Y轴标签显示浮点数一位小数

5、显示效果

代码上一波，方便以后复制

 /// <summary>/// 图标数据刷新/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void timer1_Tick(object sender, EventArgs e){x_data += 1;double y = Math.Sin(x_data * Math.PI / 180.0);chart1.ChartAreas[0].AxisX.Maximum = x_data;if (x_data > AaxisXScrollNum)  //调整显示区域跟随{chart1.ChartAreas[0].AxisX.Minimum = x_data - AaxisXScrollNum;}else{chart1.ChartAreas[0].AxisX.Minimum = 0;}chart1.Series[0].Points.AddXY(x_data, y);}double x_data = 0;private void button4_Click(object sender, EventArgs e){for (int i = 0; i < 360 * 2; i++){x_data += 1;double y = Math.Sin(i * Math.PI / 180.0);chart1.Series[0].Points.AddXY(x_data, y);}}public bool isMouseDown = false;public int lastMove = 0; // 用于记录鼠标上次移动的点，用于判断是左移还是右移double mouseDownPosX, mouseRateX;int mouseDownXoldX, mouseDownxNewX;double mouseDownPosY, mouseRateY;int mouseDownXoldY, mouseDownxNewY;#region 鼠标移动效果private void chart1_MouseUp(object sender, MouseEventArgs e){IsMoveChart = false;}bool IsMoveChart;private void chart1_MouseDown(object sender, MouseEventArgs e){//  if (checkBox1.Checked){mouseDownPosX = chart1.ChartAreas[0].AxisX.ScaleView.Position;mouseDownXoldX = e.X;mouseRateX = chart1.ChartAreas[0].AxisX.PixelPositionToValue(2) - chart1.ChartAreas[0].AxisX.PixelPositionToValue(1);IsMoveChart = true;}//   if (checkBox2.Checked){mouseDownPosY = chart1.ChartAreas[0].AxisY.ScaleView.Position;mouseDownXoldY = e.Y;mouseRateY = chart1.ChartAreas[0].AxisY.PixelPositionToValue(2) - chart1.ChartAreas[0].AxisY.PixelPositionToValue(1);IsMoveChart = true;}}/// <summary>/// 精确随鼠标移动/// </summary>private void chart1_MouseMove(object sender, MouseEventArgs e){if (IsMoveChart){//  if (checkBox1.Checked){mouseDownxNewX = e.X;chart1.ChartAreas[0].AxisX.ScaleView.Position = mouseDownPosX + (mouseDownXoldX - mouseDownxNewX) * mouseRateX;}//    if (checkBox2.Checked){mouseDownxNewY = e.Y;chart1.ChartAreas[0].AxisY.ScaleView.Position = mouseDownPosY + (mouseDownXoldY - mouseDownxNewY) * mouseRateY;}Text = "SCA:" + chart1.ChartAreas[0].AxisX.ScaleView.Size + " " + chart1.ChartAreas[0].AxisY.ScaleView.Size + "   POS:" + chart1.ChartAreas[0].AxisX.ScaleView.Position + " " + chart1.ChartAreas[0].AxisY.ScaleView.Position;}}#endregion#region 鼠标缩放效果/// <summary>/// 以鼠标中心缩放大小/// </summary>private void ResetPosVal(MouseEventArgs e){if (checkBox3.Checked){double newSizeXz = 0;//     if (e.Delta < 0) //设定放大或者缩小范围{newSizeXz = chart1.ChartAreas[0].AxisX.ScaleView.Size * 1.2f;}else{newSizeXz = chart1.ChartAreas[0].AxisX.ScaleView.Size * 0.8f;}if (newSizeXz > 0){double xMouseNew;double xMouseOld = chart1.ChartAreas[0].AxisX.PixelPositionToValue(e.X);chart1.ChartAreas[0].AxisX.ScaleView.Size = newSizeXz;xMouseNew = chart1.ChartAreas[0].AxisX.PixelPositionToValue(e.X);double newPosition = xMouseOld - xMouseNew;chart1.ChartAreas[0].AxisX.ScaleView.Position += Math.Round(newPosition, 3);}}if (checkBox4.Checked){double newSizeYz = 0;//     if (e.Delta < 0) //设定放大或者缩小范围{newSizeYz = chart1.ChartAreas[0].AxisY.ScaleView.Size * 1.2f;}else{newSizeYz = chart1.ChartAreas[0].AxisY.ScaleView.Size * 0.8f;}if (newSizeYz > 0){double xMouseNew;double xMouseOld = chart1.ChartAreas[0].AxisY.PixelPositionToValue(e.Y);chart1.ChartAreas[0].AxisY.ScaleView.Size = newSizeYz;xMouseNew = chart1.ChartAreas[0].AxisY.PixelPositionToValue(e.Y);double newPosition = xMouseOld - xMouseNew;chart1.ChartAreas[0].AxisY.ScaleView.Position += Math.Round(newPosition, 3);}}Text = "SCA:" + chart1.ChartAreas[0].AxisX.ScaleView.Size + " " + chart1.ChartAreas[0].AxisY.ScaleView.Size + "   POS:" + chart1.ChartAreas[0].AxisX.ScaleView.Position + " " + chart1.ChartAreas[0].AxisY.ScaleView.Position;}#endregion/// <summary>/// 恢复缩放位置/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button7_Click(object sender, EventArgs e){chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset(0);chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset(0);Text = "SCA:" + chart1.ChartAreas[0].AxisX.ScaleView.Size + " " + chart1.ChartAreas[0].AxisY.ScaleView.Size + "   POS:" + chart1.ChartAreas[0].AxisX.ScaleView.Position + " " + chart1.ChartAreas[0].AxisY.ScaleView.Position;timer1.Start();}/// <summary>/// 鼠标移动事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void chart1_MouseWheel(object sender, MouseEventArgs e){ResetPosVal(e);}/// <summary>/// 停止数据更新/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button8_Click(object sender, EventArgs e){timer1.Stop();// 设置不显示chart自带的滚动条chart1.ChartAreas[0].AxisX.ScrollBar.Enabled = false;chart1.ChartAreas[0].AxisY.ScrollBar.Enabled = false;chart1.ChartAreas[0].AxisY.ScaleView.Size = chart1.ChartAreas[0].AxisY.ScaleView.ViewMaximum - chart1.ChartAreas[0].AxisY.ScaleView.ViewMinimum;chart1.ChartAreas[0].AxisX.ScaleView.Size = chart1.ChartAreas[0].AxisX.ScaleView.ViewMaximum - chart1.ChartAreas[0].AxisX.ScaleView.ViewMinimum;Text = "SCA:" + chart1.ChartAreas[0].AxisX.ScaleView.Size + " " + chart1.ChartAreas[0].AxisY.ScaleView.Size + "POS:" + chart1.ChartAreas[0].AxisX.ScaleView.Position + " " + chart1.ChartAreas[0].AxisY.ScaleView.Position;}

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