/// <summary>
/// Checks the expression during editing
/// </summary>
private void OnExpressionChanged(object sender, EventArgs e)
{
TestExpression();
if (!_noEvents)
{
LabelHelper.DrawPreview(_category, _featureSet, pctPreview, txtExpression.Text, true);
RefreshControls();
}
if (!_fieldSelection)
{
// it's user input, select the <expression> on the main tab
cboField.SelectedIndex = cboField.Items.Count - 1;
}
btnApply.Enabled = true;
}
/// <summary>
/// Draws preview of the label
/// </summary>
private void DrawPreview()
{
RefreshControls();
if (_noEvents)
{
return;
}
if (_category.Visible)
{
string text = _categoryEdited ? _featureSet.Labels.Expression : txtExpression.Text;
LabelHelper.DrawPreview(_category, _featureSet, pctPreview, text, true);
}
else
{
var img = new Bitmap(pctPreview.ClientRectangle.Width, pctPreview.ClientRectangle.Height);
if (pctPreview.Image != null)
{
pctPreview.Image.Dispose();
}
pctPreview.Image = img;
}
}
/// <summary>
/// Updates preview of the labels
/// </summary>
private void DrawLabelsPreview()
{
LabelHelper.DrawPreview(_featureSet.Labels.Style, _featureSet, pctLabelPreview, false);
}