private void Canvas_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (GraphType == 0)
{
//读取数据
try
{
Time = (int)(double.Parse(SampleTimeTextBox.Text) * 1000);
Voltage = int.Parse(MaxVoltageTextBox.Text) * 1000;
TimeInterval = int.Parse(SampleIntervalTextBox.Text);
}
catch (Exception)
{
MessageBox.Show("数据异常");
}
if (SparrowChart != null)
{
SparrowChart.XAxis.MaxValue = $"{Time / 1000.0}";
SparrowChart.YAxis.MaxValue = $"{Voltage / 1000.0}";
SparrowChart.UpdateLayout();
MainWindowModel.SetData(new Dictionary <int, double>());
}
Canvas canvas = sender as Canvas;
//Voltages.Clear();
pointList.Clear();
canvas.Children.Clear();
canvas.Children.Add(BackgroudChart);
canvas.Children.Add(coordLabel);
Point point = e.GetPosition(canvas);
coordLabel.SetValue(Canvas.LeftProperty, point.X + 5);
coordLabel.SetValue(Canvas.TopProperty, point.Y - 15);
if ((Voltage <= 0) || (Time <= 0))
{
MessageBox.Show("未选择有效的XY轴范围");
return;
}
//容量
RecordVoltages.Clear();
int capacity = (Time / TimeInterval);
for (int i = 0; i < capacity; i++)
{
RecordVoltages.Add(TimeInterval * i, 0);
}
}
}
/// <summary>
/// 图表类型
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void GraphTypeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (IsLoaded)
{
int index = (sender as ComboBox).SelectedIndex;
if (index == 0)
{
CheckButton.IsEnabled = true;
SinewaveStackPanel.IsEnabled = false;
}
else if ((index == 1) || (index == 2))
{
CheckButton.IsEnabled = true;
SinewaveStackPanel.IsEnabled = true;
}
else
{
CheckButton.IsEnabled = false;
SinewaveStackPanel.IsEnabled = false;
}
GraphType = index;
//清空图表
try
{
Time = int.Parse(SampleTimeTextBox.Text) * 1000;
Voltage = int.Parse(MaxVoltageTextBox.Text) * 1000;
TimeInterval = int.Parse(SampleIntervalTextBox.Text);
}
catch (Exception)
{
MessageBox.Show("数据异常");
}
if (SparrowChart != null)
{
SparrowChart.XAxis.MaxValue = $"{Time / 1000.0}";
SparrowChart.YAxis.MaxValue = $"{Voltage / 1000.0}";
SparrowChart.UpdateLayout();
MainWindowModel.SetData(new Dictionary <int, double>());
}
//Voltages.Clear();
pointList.Clear();
Canvas.Children.Clear();
Canvas.Children.Add(BackgroudChart);
//Canvas.Children.Add(coordLabel);
if ((Voltage <= 0) || (Time <= 0))
{
MessageBox.Show("未选择有效的XY轴范围");
return;
}
//容量
RecordVoltages.Clear();
int capacity = (int)(Time / TimeInterval);
for (int i = 0; i < capacity; i++)
{
RecordVoltages.Add(TimeInterval * i, 0);
}
}
}
private void CheckButton_Click(object sender, RoutedEventArgs e)
{
if (GraphType == 0)
{
var points = pointList.Distinct().ToList();
var validPoints = new List <Point>();
if (points?.Count > 0)
{
var xLength = Canvas.ActualWidth - BasePoint.X;
int pointCount = Time / TimeInterval;
double xInterval = xLength / pointCount;
double currentX = BasePoint.X;
int currentTime = 0;
RecordVoltages.Clear();
for (int i = 0; i < pointCount; i++)
{
RecordVoltages.Add(i * TimeInterval, 0);
}
for (int i = 1; i < points.Count; i++)
{
while (true)
{
if (currentX > points[i].X)
{
//到下一个点
break;
}
else if ((currentX > points[i - 1].X) && (currentX < points[i].X))
{
//计算线公式
double a = (points[i].Y - points[i - 1].Y) / (points[i].X - points[i - 1].X);
double b1 = points[i].Y - a * points[i].X;
double b2 = points[i - 1].Y - a * points[i - 1].X;
//计算当前点
double y = currentX * a + b1;
Point point = new Point(currentX, y);
validPoints.Add(point);
double yRatio = (BasePoint.Y - y) / BasePoint.Y;
RecordVoltages[currentTime] = Voltage * yRatio;
//递进
currentX += xInterval;
currentTime += TimeInterval;
}
else
{
//当前点小于有效点,递进
currentX += xInterval;
currentTime += TimeInterval;
}
}
}
MainWindowModel.SetPulseData(RecordVoltages);
}
}
else
{
//数据校验
try
{
Time = (int)(double.Parse(SampleTimeTextBox.Text) * 1000);
Voltage = double.Parse(MaxVoltageTextBox.Text) * 1000;
TimeInterval = int.Parse(SampleIntervalTextBox.Text);
Frequency = int.Parse(FrequencyTextBox.Text);
DutyRatio = int.Parse(DutyRatioTextBox.Text);
if ((Time <= 0) || (Voltage <= 0) || (TimeInterval <= 0) || (Frequency <= 0))
{
MessageBox.Show("数据必须大于0!");
return;
}
double sampleFrequency = 1000.0 / TimeInterval;
if (sampleFrequency < (Frequency * 2))
{
MessageBox.Show($"采样频率({sampleFrequency.ToString("F2")})必须大于输出频率的2倍({Frequency.ToString("F2")} * 2)");
return;
}
}
catch (Exception)
{
MessageBox.Show("数据异常");
return;
}
if (SparrowChart != null)
{
SparrowChart.XAxis.MaxValue = $"{Time * 1.2 / 1000.0}";
SparrowChart.YAxis.MaxValue = $"{Voltage * 1.2 / 1000.0}";
SparrowChart.UpdateLayout();
MainWindowModel.SetData(new Dictionary <int, double>());
}
//Voltages.Clear();
pointList.Clear();
Canvas.Children.Clear();
Canvas.Children.Add(BackgroudChart);
//容量
RecordVoltages.Clear();
int capacity = (int)(Time / TimeInterval);
for (int i = 0; i < capacity; i++)
{
RecordVoltages.Add(TimeInterval * i, 0);
}
if (GraphType == 1)
{
//(周期,单位MS)
double cycleTime = 1 * 1000.0 / Frequency;
double positiveTime = cycleTime * (DutyRatio * 0.01);
for (int i = 0; i < RecordVoltages.Count; i++)
{
//当前在周期中的时间
double currentTime = (TimeInterval * i) % cycleTime;
//判断是高电平还是低电平
if (currentTime < positiveTime)
{
RecordVoltages[TimeInterval * i] = Voltage;
}
else
{
RecordVoltages[TimeInterval * i] = 0;
}
}
}
MainWindowModel.SetPulseData(RecordVoltages);
}
}