/**
* Takes in the width of a waveform image, the length of a song in seconds, a properly formatted string for an image, and the Canvas this all needs to be drawn in.
* Will return the generated waveform canvas with the image and timestamps
*
**/
/*public Canvas initializeWaveform(int width, int seconds, string source, Canvas topCanvas)
{
Canvas waveformCanvas = new Canvas //generates canvas to be returned
{
Height = 160,
Width = width
};
topCanvas.Children.Add(waveformCanvas); //properly adds and positions waveformCanvas within topCanvas
Canvas.SetLeft(waveformCanvas, 0);
Canvas.SetTop(waveformCanvas, 400);
Image waveformImage = new Image //generates image object within waveformCanvas
{
Height = waveformCanvas.Height,
Width = waveformCanvas.Width,
Stretch = Stretch.Fill
};
waveformCanvas.Children.Add(waveformImage); //adds and positions waveformImage within waveformCanvas
Canvas.SetLeft(waveformImage, 8);
Canvas.SetTop(waveformImage, 0);
waveformImage.Source = new BitmapImage(new Uri(source,UriKind.RelativeOrAbsolute)); //adds source to waveformImage
double timeInc = 30 * ((double) width) / ((double) seconds);
for (int i = 0; (i * timeInc) < width; i++) //generates timestamps every 30 seconds and lines every 15 seconds
{
TextBlock nextTimestamp = new TextBlock();
nextTimestamp.Foreground = Brushes.Black;
waveformCanvas.Children.Add(nextTimestamp);
Canvas.SetLeft(nextTimestamp, i * timeInc);
nextTimestamp.Text = numToTime(i * 30);
Rectangle timeTick = new Rectangle();
timeTick.Height = waveformCanvas.Height-15;
timeTick.Width = 1;
timeTick.Stroke = Brushes.Black;
waveformCanvas.Children.Add(timeTick);
Canvas.SetLeft(timeTick, i * timeInc + 8);
Canvas.SetTop(timeTick, 15);
Rectangle timeTick2 = new Rectangle();
timeTick2.Height = waveformCanvas.Height - 25;
timeTick2.Width = 1;
timeTick2.Stroke = Brushes.Black;
waveformCanvas.Children.Add(timeTick2);
Canvas.SetLeft(timeTick2, i * timeInc + 8 + (timeInc/2));
Canvas.SetTop(timeTick2, 20);
}
return waveformCanvas;
}
public Rectangle selectSegment(int width, int seconds, int start, int length, Canvas waveformCanvas, Rectangle selection)
{
double timeInc = ((double)width) / ((double)seconds);
if (selection == null)
{
selection = new Rectangle
{
Height = waveformCanvas.Height,
Width = timeInc,
Visibility = Visibility.Hidden,
Opacity = .2,
Fill = Brushes.Orange,
Stroke = Brushes.Transparent
};
waveformCanvas.Children.Add(selection);
}
Canvas.SetLeft(selection, start * timeInc + 8);
Canvas.SetTop(selection, 0);
selection.Width = length * timeInc;
selection.Visibility = Visibility.Visible;
return selection;
}
public Rectangle deselectSegment(int width, int seconds, int start, int length, Canvas waveformCanvas, Rectangle selection)
{
double timeInc = ((double)width) / ((double)seconds);
if (selection == null)
{
selection = new Rectangle
{
Height = waveformCanvas.Height,
Width = timeInc,
Visibility = Visibility.Hidden,
Opacity = .5,
Fill = Brushes.Orange,
Stroke = Brushes.Transparent
};
waveformCanvas.Children.Add(selection);
}
selection.Visibility = Visibility.Hidden;
return selection;
}
private string numToTime(int num) // helper function to convert a time in seconds to a 'min:sec' format
{
int min = 0;
int sec = num;
while (sec > 30)
{
sec -= 60;
min++;
}
if (sec == 0)
{
return "" + min + ":00";
}
return "" + min + ":30";
}
/**
* Will incrementally shift given canvas the given amount of pixels.
* Uses waveformOnEdge to check to see if canvas is on edge of screen, does not move waveform if it is.
**/
/*public void shiftCanvas(int pixels, Canvas canvas)
{
int inc = 1;
if (pixels < 0)
{
inc *= -1;
pixels *= -1;
}
for (int i = 0; i < pixels; i++)
{
if (waveformOnEdge(canvas) == 0 || ((waveformOnEdge(canvas) == -1) && inc < 0) || ((waveformOnEdge(canvas) == 1) && inc > 0))
{
//textBlock1.Text = "" + waveformOnEdge(canvas);
Canvas.SetLeft(canvas, Canvas.GetLeft(canvas) + inc);
}
else
{
return;
}
}
}
/**
* Checks to see if waveform is on edge of screen (currently hardcoded to 1024).
*
**/
/*public int waveformOnEdge(Canvas waveformCanvas)
{
textBlock1.Text = "" + (Canvas.GetLeft(waveformCanvas) + waveformCanvas.Width);
if(Canvas.GetLeft(waveformCanvas) == 0) return -1;
if(Canvas.GetLeft(waveformCanvas)+waveformCanvas.Width == 1024) return 1;
return 0;
}
*/
//testing button functions follow
private void button1_Click(object sender, RoutedEventArgs e)
{
wf = new Waveform(1800, 259, "pack://application:,,,/WaveformStuff;component/beatit-waveform.png",windowCanvas);
}
public MainWindow()
{
InitializeComponent();
wf = null;
select = false;
}
