how to make a drawing area?

how to make a drawing area?

• Luo Cao

  You can use panel as a paper and use system.drawing (you need to add system.drawing component)

  Private Sub panel1_Paint(ByVal sender As System.Object, ByVal e As PaintEventArgs) Handles penal1.Paint

  e.Graphics.DrawImage(Me.bitmap, 0, 0)

  End Sub

  Private Sub panel1_MouseDown(ByVal sender As System.Object, ByVal e As MouseEventArgs) Handles panel1.MouseDown

  Me.hasCapture = True

  Me.oldX = e.X

  Me.oldY = e.Y

  End Sub

  Private Sub penal1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs) Handles penal1.MouseMove

  Dim x, y As Integer

  If Me.hasCapture Then

  x = e.X

  y = e.Y

  ' Draw line from last hit point to current hit point

  Graphics.FromImage(bitmap).DrawLine(New Pen(Me.currentColorPanel.BackColor), Me.oldX, Me.oldY, x, y)

  Me.pDrawWindow.Invalidate(New Rectangle(Math.Min(x, Me.oldX), Math.Min(y, Me.oldY), Math.Abs(Me.oldX - x) + 1, Math.Abs(Me.oldY - y) + 1))

  Me.oldX = x

  Me.oldY = y

  End If

  End Sub

  Private Sub panel1_MouseUp(ByVal sender As Object, ByVal e As MouseEventArgs) Handles penal1.MouseUp

  Me.hasCapture = False

  End Sub

  
  

• eroe

  Thanks for your code.
  I was wondering if anyone has C# code for that
  I tried to convert your example into C# and I had trouble understanding what you mean by pDrawWindow I tried calling the invalidate method on both the form and the panel but nothing comes up.
  thanks
  
     
  public partial class Form2 : Form
      {
          private Image bitmap = new Bitmap(10, 10);
          private bool hasCapture;
          private int oldX = 0;
          private int oldY = 0;
          public Form2()
          {
              InitializeComponent();
  
          }
  
          private void panel1_Paint(object sender, PaintEventArgs e)
          {
              e.Graphics.DrawImage(bitmap, 0, 0);
          }
  
          private void panel1_MouseDown(object sender, MouseEventArgs e)
          {
              hasCapture = true;
              oldX = e.X;
              oldY = e.Y;
  
          }
  
          private void panel1_MouseMove(object sender, MouseEventArgs e)
          {
              int x, y;
              if (hasCapture)
              {
                  x = e.X;
                  y = e.Y;
                
                  Graphics.FromImage(bitmap).DrawLine(new Pen(Color.Black), oldX, oldY, x, y);
                  panel1.Invalidate(new Rectangle(Math.Min(x, oldX), Math.Min(y, oldY), Math.Abs(oldX - x) + 1, Math.Abs(oldY - y) + 1));
  
                  oldX = x;
                  oldY = y;
  
              }
          }
  
          private void panel1_MouseUp(object sender, MouseEventArgs e)
          {
              hasCapture = false;
          }
      }
  
  

• anisxahmed

  How about using the InkX
  I was wondering if anyone could provide information about how to create it.
  
  ps: I tried to drop the control on the form, however nothing comes up when deployed! I assume there is steps that I have to follow in order to make it work
  
  I'm already using SDF 2.0 of the OpenNETCF
  
  
  

• shai

  The SDF 1.4 has the Signature control, that you can use as a starting point for your needs.

  
  

• Alexei_shk

  Its working fine now
  
  just changed the "pDrawWindow" to be the panel.
  
  thanks for help
  
  
• how to make a drawing area?