// Function will delete the point nearby on right mouse press
public void RightButtonPress(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
// Get x,y mouse position
int[] pos = iren.GetEventPosition();
int x = pos[0]; int y = pos[1];
// Find the nearest point
double dist = 0; pointsel = -1;
for (int i = 1; i < npoints - 1; i++)
{
dist = Math.Sqrt(Math.Pow((double)(pointsx[i] - x), 2) + Math.Pow((double)(pointsy[i] - y), 2));
if (dist < rad)
{
pointsel = i;
}
}
// When point is found, delete it.
if (pointsel > 0)
{
npoints--;
for (int i = pointsel; i < npoints; i++)
{
pointsx[i] = pointsx[i + 1];
pointsy[i] = pointsy[i + 1];
pointsc[i] = pointsc[i + 1];
}
// Draw and Render the histogram and transferfunction
drawhisto(); drawcurve();
renHist.Render();
}
pointsel = -1;
}
public void MiddleButtonPress(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
// Get x,y mouse position
int[] pos = iren.GetEventPosition();
int x = pos[0]; int y = pos[1];
// Find the nearest point
double dist = 0; pointsel = -1;
for (int i = 0; i < npoints; i++)
{
dist = Math.Sqrt(Math.Pow((double)(pointsx[i] - x), 2) + Math.Pow((double)(pointsy[i] - y), 2));
if (dist < rad)
{
pointsel = i;
}
}
// When point is found
if (pointsel > -1)
{
pointsc[pointsel]++; if (pointsc[pointsel] > 13)
{
pointsc[pointsel] = 1;
}
drawhisto(); drawcurve();
renHist.Render();
}
pointsel = -1;
}
// Function moves a selected point during mouse movement
public void MouseMove(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
if (pointsel > -1) // Point selected
{
// Get x,y mouse position
int[] pos = iren.GetEventPosition();
int x = pos[0]; int y = pos[1];
// Limit mouse position to histogram window
if (x < 0)
{
x = 0;
}
else if (x > width - 1)
{
x = width - 1;
}
if (y < 0)
{
y = 0;
}
else if (y > height - 1)
{
y = height - 1;
}
// Set the x variable of the selected point to the mouse x
// (only if it's not the first or last point)
if ((pointsel > 0) && (pointsel < npoints - 1))
{
if (x <= pointsx[pointsel - 1])
{
x = pointsx[pointsel - 1] + 1;
}
if (x >= pointsx[pointsel + 1])
{
x = pointsx[pointsel + 1] - 1;
}
pointsx[pointsel] = x;
}
// Set the y variable of the selected point
pointsy[pointsel] = y;
// Draw and Render the histogram and transferfunction
drawhisto(); drawcurve();
renHist.Render();
}
}
static void PrintCameraPosition(vtk.vtkObject caller, uint eventId,
object clientData, IntPtr callData)
{
System.Diagnostics.Debug.WriteLine("Callback has been called.");
vtk.vtkRenderer ren = vtk.vtkRenderer.SafeDownCast(caller);
if (ren != null)
{
double[] position = ren.GetActiveCamera().GetPosition();
Console.WriteLine(String.Format("{0}, {1}, {2}",
position[0], position[1], position[2]));
}
else
{
System.Diagnostics.Debug.WriteLine("Caller is not a renderer.");
}
}
static void myCallback(vtk.vtkObject caller, uint eventId,
object clientData, IntPtr callData)
{
System.Diagnostics.Debug.WriteLine("Callback has been called.");
vtk.vtkBoxWidget boxWidget = vtk.vtkBoxWidget.SafeDownCast(caller);
if (null != boxWidget)
{
using (vtk.vtkTransform t = new vtk.vtkTransform())
{
boxWidget.GetTransform(t);
boxWidget.GetProp3D().SetUserTransform(t);
}
}
else
{
System.Diagnostics.Debug.WriteLine("Caller is not a box widget.");
}
}
public void MouseRelease(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
m_parent.ShowBusy(false);
}
public void MousePress(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
m_parent.ShowBusy(true);
}
// Deselect point add mouse release
public void LeftButtonRelease(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
pointsel = -1;
}
// This function will find or create a selectedpoint
// on the position of the left button click
public void LeftButtonPress(vtk.vtkObject obj, uint eventId, Object data, IntPtr clientdata)
{
// Get x,y mouse position
int[] pos = iren.GetEventPosition();
int x = pos[0]; int y = pos[1];
// Calculate the distance from mouse position to the points
// a point near the mousecursor will be selected
double dist = 0; pointsel = -1;
for (int i = 0; i < npoints; i++)
{
dist = Math.Sqrt(Math.Pow((double)(pointsx[i] - x), 2) + Math.Pow((double)(pointsy[i] - y), 2));
if (dist < rad)
{
pointsel = i;
}
}
// If no point beneath the mouse cursor then this code will
// create a point. (if the mouse is close to the curve)
if (pointsel == -1)
{
double mindistv = 999; int mindistx = 0; int mindisty = 0;
int[] linevector = makevector(); // Get an array with all curve pixels
// Find pixel of the curve near the mouse position.
for (int i = 0; i < width; i++)
{
dist = Math.Sqrt(Math.Pow((double)(i - x), 2) + Math.Pow((double)(linevector[i] - y), 2));
if (dist < mindistv)
{
mindistv = dist;
mindistx = i;
mindisty = linevector[i];
}
}
// Add a new point (if mouse is position is near the curve)
if (mindistv < rad)
{
int dp = npoints - 1;
// Make room for the new point in the array
while (mindistx < pointsx[dp])
{
pointsx[dp + 1] = pointsx[dp];
pointsy[dp + 1] = pointsy[dp];
pointsc[dp + 1] = pointsc[dp];
dp--;
}
pointsx[dp + 1] = mindistx;
pointsy[dp + 1] = mindisty;
pointsc[dp + 1] = 1;
pointsel = dp + 1;
npoints++;
// Draw and Render the histogram and transferfunction
drawhisto(); drawcurve();
renHist.Render();
}
}
}
