private void centreOfCurveCheckBox_CheckedChanged(object sender, EventArgs e)
{
// Toggle the status.
m_WantCentre = !m_WantCentre;
// If the user now wants to use the centre point as backsight
if (m_WantCentre)
{
// How many circles were incident on the from-point?
int ncircle = m_Circles.Count;
// There SHOULD be at least one (otherwise the checkbox that
// leads to this function should have been diabled).
if (ncircle==0)
{
MessageBox.Show("The from-point does not coincide with any circular curves.");
centreOfCurveCheckBox.Checked = false;
return;
}
// Get the circle involved. If there's more than one, we need
// to ask the user which one.
Circle circle;
if (ncircle==1)
circle = m_Circles[0];
else
{
// Ask the user to select a circle.
GetCircleForm dial = new GetCircleForm(m_Circles);
if (dial.ShowDialog() != DialogResult.OK)
{
centreOfCurveCheckBox.Checked = false;
return;
}
circle = dial.Circle;
dial.Dispose();
}
// Get the point at the centre.
ISpatialModel map = CadastralMapModel.Current;
ISpatialObject so = map.QueryClosest(circle.Center, Backsight.Length.Zero, SpatialType.Point);
m_Backsight = (so as PointFeature);
// Confirm that we got something.
if (m_Backsight==null)
{
MessageBox.Show("Cannot find the center point.");
centreOfCurveCheckBox.Checked = false;
return;
}
// Display the key of the backsight.
backsightTextBox.Text = String.Format("+{0}", m_Backsight.FormattedKey);
// Disable the backsight field.
backsightTextBox.Enabled = false;
// Resume in the angle field.
angleTextBox.Focus();
}
else
{
// Draw any backsight point normally.
SetNormalColour(m_Backsight);
// Reset backsight stuff.
m_Backsight = null;
backsightTextBox.Enabled = true;
backsightTextBox.Text = String.Empty;
// Resume in the backsight field.
backsightTextBox.Focus();
}
OnChange();
}
private void useCenterCheckBox_CheckedChanged(object sender, EventArgs e)
{
// Draw any existing backsight point normally.
//SetNormalColour(m_pBacksight);
// Toggle the status.
m_WantCentre = !m_WantCentre;
// If the user now wants to use the centre point as backsight
if (m_WantCentre)
{
// How many circles were incident on the from-point?
int ncircle = m_Circles.Count;
// There SHOULD be at least one (otherwise the checkbox that
// leads to this function should have been disabled).
if (ncircle==0)
{
MessageBox.Show("The from-point does not coincide with any circular arcs.");
useCenterCheckBox.Checked = false;
return;
}
// Get the circle involved. If there's more than one, we need
// to ask the user which one.
Circle circle = m_Circles[0];
if (ncircle > 1)
{
// Ask the user to select a circle.
GetCircleForm dial = new GetCircleForm(m_Circles);
if (dial.ShowDialog() != DialogResult.OK)
{
useCenterCheckBox.Checked = false;
dial.Dispose();
return;
}
circle = dial.Circle;
dial.Dispose();
}
// Get the point at the center.
m_Backsight = circle.CenterPoint;
// Confirm that we got something.
if (m_Backsight==null)
{
MessageBox.Show("Cannot find the center point.");
useCenterCheckBox.Checked = false;
return;
}
// Display the key of the backsight.
ShowKey(backsightTextBox, m_Backsight);
// Disable the backsight field.
backsightTextBox.Enabled = false;
// Resume in the direction field.
directionTextBox.Focus();
}
else
{
// Reset and enable backsight stuff.
m_Backsight = null;
backsightTextBox.Enabled = true;
backsightTextBox.Text = String.Empty;
// Resume in the backsight field.
backsightTextBox.Focus();
}
OnNewDirection();
}
