c# problem

Mr.Plough

Hi, wondering if anyone can help me with this. When the mouse is clicked somewhere in an image, the x and y pixel coordinates are displayed in two textboxes. What I want to do is display a corresponding value from the pixeldata array in a third textbox.


So I need something like textbox3.text = Convert.ToString(pixeldata[clickedPoint.X + clickedPoint.Y*320]);

But I cant access the clickedpoint values outside of the mousebuttonevent. (or vice versa with the pixeldata array)

My programming knowledge is fairly basic and I've been learning as I go along with this project.

void DepthFrameReady(object sender, DepthImageFrameReadyEventArgs e)
        {
            DepthImageFrame imageFrame = e.OpenDepthImageFrame();
            if (imageFrame != null)
            {
                short[] pixelData = new short[imageFrame.PixelDataLength];
                imageFrame.CopyPixelDataTo(pixelData);
                int temp = 0;
                int i = 0;
                for (int y = 0; y < 240; y += s)
                    for (int x = 0; x < 320; x += s)
                    {
                        temp = ((ushort)pixelData[x + y * 320]) >> 3;
                        ((TranslateTransform3D)points[i].Transform).OffsetZ = temp;
                        i++;
                                          

                    }                
            }        
                       
        }

 private void canvas1_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {

            var clickedPoint = e.GetPosition((Canvas)sender);
            String xcoord = Convert.ToString(clickedPoint.X);
            String ycoord = Convert.ToString(clickedPoint.Y);
            textBox1.Text = (xcoord);
            textBox2.Text = (ycoord);
                        
        }

amen

You can add the code for the third box in the function existingcanvas1_PreviewMouseLeftButtonDown

[PHP]
private void canvas1_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{

var clickedPoint = e.GetPosition((Canvas)sender);
String xcoord = Convert.ToString(clickedPoint.X);
String ycoord = Convert.ToString(clickedPoint.Y);
textBox1.Text = (xcoord);
textBox2.Text = (ycoord);
textBox3.Text = Convert.ToString(pixeldata[clickedPoint.X + clickedPoint.Y*320]);

}

[/PHP]

Mr.Plough

But I can't access the pixeldata array outside of the depthframeready event

professore

Not a C# expert but

short[] pixelData needs to be declared as a member variable of the form class. Then you can set it inside the event and still have it available outside.