private void InitPositioning(ILabelsLayer labels)
{
_noEvents = true;
// Disable all by default
cboLineOrientation.Enabled = false;
optPosition1.Visible = false;
optPosition2.Visible = false;
optPosition3.Visible = false;
optPosition4.Visible = false;
groupBoxPositioning.Visible = false;
if (_featureSet.IsPolygon)
{
InitPositioningForPolygonFeatures(labels);
}
else if (_featureSet.IsPolyline)
{
InitPositioningForPolylineFeatures(labels);
}
else
{
InitPositioningForPointFeatures(labels);
}
_noEvents = false;
}
private string GetLabelField(ILabelsLayer labels)
{
var s = labels.Expression.Trim();
if (s.StartsWith("[") && s.EndsWith("]"))
{
return(s.Substring(1, s.Length - 2));
}
return(string.Empty);
}
private void InitAlignment(ILabelsLayer labels)
{
var alignment = labels.Style.Alignment;
optAlignBottomCenter.Checked = (alignment == LabelAlignment.BottomCenter);
optAlignBottomLeft.Checked = (alignment == LabelAlignment.BottomLeft);
optAlignBottomRight.Checked = (alignment == LabelAlignment.BottomRight);
optAlignCenter.Checked = (alignment == LabelAlignment.Center);
optAlignCenterLeft.Checked = (alignment == LabelAlignment.CenterLeft);
optAlignCenterRight.Checked = (alignment == LabelAlignment.CenterRight);
optAlignTopCenter.Checked = (alignment == LabelAlignment.TopCenter);
optAlignTopLeft.Checked = (alignment == LabelAlignment.TopLeft);
optAlignTopRight.Checked = (alignment == LabelAlignment.TopRight);
}
private void InitPositioningForPolylineFeatures(ILabelsLayer labels)
{
optPosition1.Text = "First segment";
optPosition2.Text = "Last segment";
optPosition3.Text = "Middle segment";
optPosition4.Text = "The longest segment";
optPosition1.Tag = LabelPosition.FirstSegment;
optPosition2.Tag = LabelPosition.LastSegment;
optPosition3.Tag = LabelPosition.MiddleSegment;
optPosition4.Tag = LabelPosition.LongestSegement;
optPosition1.Checked = labels.Positioning == LabelPosition.FirstSegment;
optPosition2.Checked = labels.Positioning == LabelPosition.LastSegment;
optPosition3.Checked = (labels.Positioning == LabelPosition.MiddleSegment || labels.Positioning == LabelPosition.None);
optPosition4.Checked = labels.Positioning == LabelPosition.LongestSegement;
optPosition1.Visible = true;
optPosition2.Visible = true;
optPosition3.Visible = true;
optPosition4.Visible = true;
// Add items to line orientation
if (cboLineOrientation.Items.Count == 0)
{
// Line orientation
cboLineOrientation.Items.Clear();
cboLineOrientation.Items.Add("Horizontal");
cboLineOrientation.Items.Add("Parallel");
cboLineOrientation.Items.Add("Perpindicular");
}
if (labels.Style.Orientation == LabelOrientation.Horizontal)
{
cboLineOrientation.SelectedIndex = 0;
}
else if (labels.Style.Orientation == LabelOrientation.Parallel)
{
cboLineOrientation.SelectedIndex = 1;
}
else if (labels.Style.Orientation == LabelOrientation.Perpindicular)
{
cboLineOrientation.SelectedIndex = 2;
}
cboLineOrientation.Enabled = true;
groupBoxPositioning.Visible = true;
}
private void UpdatePositioningForPolylineFeatures(ILabelsLayer labels)
{
UpdatePositioningForPolyFeatures(labels);
if (cboLineOrientation.SelectedIndex == 0)
{
labels.Style.Orientation = LabelOrientation.Horizontal;
}
else if (cboLineOrientation.SelectedIndex == 1)
{
labels.Style.Orientation = LabelOrientation.Parallel;
}
else if (cboLineOrientation.SelectedIndex == 2)
{
labels.Style.Orientation = LabelOrientation.Perpindicular;
}
}
private void UpdatePositioningForPolyFeatures(ILabelsLayer labels)
{
if (optPosition1.Checked)
{
labels.Positioning = (LabelPosition)optPosition1.Tag;
}
else if (optPosition2.Checked)
{
labels.Positioning = (LabelPosition)optPosition2.Tag;
}
else if (optPosition3.Checked)
{
labels.Positioning = (LabelPosition)optPosition3.Tag;
}
else if (optPosition4.Checked)
{
labels.Positioning = (LabelPosition)optPosition4.Tag;
}
}
private void InitPositioningForPolygonFeatures(ILabelsLayer labels)
{
optPosition1.Text = "Center";
optPosition2.Text = "Centroid";
optPosition3.Text = "Interior point";
optPosition1.Tag = LabelPosition.Center;
optPosition2.Tag = LabelPosition.Centroid;
optPosition3.Tag = LabelPosition.InteriorPoint;
optPosition1.Visible = true;
optPosition2.Visible = true;
optPosition3.Visible = true;
optPosition4.Visible = false;
optPosition1.Checked = (labels.Positioning == LabelPosition.Center || labels.Positioning == LabelPosition.None);
optPosition2.Checked = labels.Positioning == LabelPosition.Centroid;
optPosition3.Checked = labels.Positioning == LabelPosition.InteriorPoint;
groupBoxPositioning.Visible = true;
}
private void RestoreFields(ILabelsLayer labels)
{
string name = GetLabelField(labels);
if (string.IsNullOrWhiteSpace(name))
{
cboField.SelectedIndex = !string.IsNullOrWhiteSpace(labels.Expression) ? cboField.Items.Count - 1 : 0;
}
else
{
SetFieldValue(cboField, name);
}
if (_featureSet != null)
{
SetFieldValue(cboSortField, _featureSet.SortField);
chkSortAscending.Checked = _featureSet.SortAscending;
}
chkLogScaleForSize.Checked = labels.LogScaleForSize;
chkUseVariableSize.Checked = labels.UseVariableSize;
}
private void UpdatePositioningForPolygonFeatures(ILabelsLayer labels)
{
UpdatePositioningForPolyFeatures(labels);
}
private void InitPositioningForPointFeatures(ILabelsLayer labels)
{
labels.Positioning = LabelPosition.Center;
}
