109 lines
3.2 KiB
C#
109 lines
3.2 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Windows;
|
|
using System.Windows.Controls;
|
|
using System.Windows.Data;
|
|
using System.Windows.Documents;
|
|
using System.Windows.Input;
|
|
using System.Windows.Media;
|
|
using System.Windows.Media.Imaging;
|
|
using System.Windows.Navigation;
|
|
using System.Windows.Shapes;
|
|
|
|
namespace NAudioWpfDemo
|
|
{
|
|
/// <summary>
|
|
/// Interaction logic for WaveFormControl.xaml
|
|
/// </summary>
|
|
public partial class WaveFormControl : UserControl, IWaveFormRenderer
|
|
{
|
|
int renderPosition;
|
|
double yTranslate = 40;
|
|
double yScale = 40;
|
|
int blankZone = 10;
|
|
|
|
List<Line> lines = new List<Line>();
|
|
|
|
public WaveFormControl()
|
|
{
|
|
InitializeComponent();
|
|
this.SizeChanged += new SizeChangedEventHandler(WaveFormControl_SizeChanged);
|
|
}
|
|
|
|
void WaveFormControl_SizeChanged(object sender, SizeChangedEventArgs e)
|
|
{
|
|
// To just remove what is on the right of the now cursor:
|
|
/*int remove = mainCanvas.Children.Count - x;
|
|
mainCanvas.Children.RemoveRange(0, remove);*/
|
|
|
|
// We will remove everything as we are going to rescale vertically
|
|
renderPosition = 0;
|
|
ClearAllLines();
|
|
|
|
this.yTranslate = this.ActualHeight / 2;
|
|
this.yScale = this.ActualHeight / 2;
|
|
}
|
|
|
|
private void ClearAllLines()
|
|
{
|
|
//mainCanvas.Children.Clear();
|
|
for (int n = 0; n < lines.Count; n++)
|
|
{
|
|
lines[n].Visibility = Visibility.Collapsed;
|
|
}
|
|
}
|
|
|
|
public void AddValue(float maxValue, float minValue)
|
|
{
|
|
int pixelWidth = (int)ActualWidth;
|
|
if (pixelWidth > 0)
|
|
{
|
|
Line line = CreateLine(maxValue, minValue);
|
|
|
|
if (renderPosition > ActualWidth)
|
|
{
|
|
renderPosition = 0;
|
|
}
|
|
int erasePosition = (renderPosition + blankZone) % pixelWidth;
|
|
if (erasePosition < lines.Count)
|
|
{
|
|
lines[erasePosition].Visibility = Visibility.Collapsed;
|
|
}
|
|
}
|
|
}
|
|
|
|
private Line CreateLine(float maxValue, float minValue)
|
|
{
|
|
Line line;
|
|
if (renderPosition >= lines.Count)
|
|
{
|
|
line = new Line();
|
|
lines.Add(line);
|
|
mainCanvas.Children.Add(line);
|
|
}
|
|
else
|
|
{
|
|
line = lines[renderPosition];
|
|
}
|
|
line.Stroke = this.Foreground;
|
|
line.X1 = renderPosition;
|
|
line.X2 = renderPosition;
|
|
line.Y1 = yTranslate + minValue * yScale;
|
|
line.Y2 = yTranslate + maxValue * yScale;
|
|
renderPosition++;
|
|
line.Visibility = Visibility.Visible;
|
|
return line;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Clears the waveform and repositions on the left
|
|
/// </summary>
|
|
public void Reset()
|
|
{
|
|
renderPosition = 0;
|
|
ClearAllLines();
|
|
}
|
|
}
|
|
}
|