public static VisibilityQueryForm GetInstance(MapLayersHandler handler)
{
if (_instance == null)
{
_instance = new VisibilityQueryForm(handler);
}
return(_instance);
}
private void OnButtonClick(object sender, EventArgs e)
{
switch (((Button)sender).Name)
{
case "btnClear":
txtVisibilityExpression.Text = "";
_shapefileLayer.VisibilityExpression = "";
_parentForm.MainForm.MapControl.Redraw();
break;
case "btnLabelFeatures":
var labelsForm = LabelsForm.GetInstance(_mapLayers, this);
if (!labelsForm.Visible)
{
labelsForm.Show(this);
}
else
{
labelsForm.BringToFront();
}
break;
case "btnLabelCategories":
break;
case "btnFeatureSymbols":
switch (_shapefileLayer.ShapefileType)
{
case ShpfileType.SHP_POINT:
var pointSymbologyForm = PointLayerSymbologyForm.GetInstance(this, _mapLayer);
if (pointSymbologyForm.Visible)
{
pointSymbologyForm.BringToFront();
}
else
{
pointSymbologyForm.Show(this);
}
break;
case ShpfileType.SHP_POLYGON:
case ShpfileType.SHP_POLYLINE:
var symbologyForm = PolygonLineLayerSymbologyForm.GetInstance(this, _mapLayer);
if (symbologyForm.Visible)
{
symbologyForm.BringToFront();
}
else
{
symbologyForm.Show(this);
}
break;
}
break;
case "btnFeatureCategories":
break;
case "btnClose":
Close();
break;
case "btnDefineVisibilityExpression":
var visibilityQueryForm = VisibilityQueryForm.GetInstance(_mapLayers);
visibilityQueryForm.VisibilityExpression = txtVisibilityExpression.Text;
visibilityQueryForm.ExpressionTarget = VisibilityExpressionTarget.ExpressionTargetShape;
if (!visibilityQueryForm.Visible)
{
visibilityQueryForm.Show(this);
}
else
{
visibilityQueryForm.BringToFront();
}
break;
case "btnApplyVisibility":
if (txtVisibilityExpression.Text.Length == 0)
{
_shapefileLayer.VisibilityExpression = "";
}
else
{
_shapefileLayer.VisibilityExpression = _mapLayer.ShapesVisibilityExpression;
}
_parentForm.MainForm.MapControl.Redraw();
break;
case "btnApply":
_mapLayers.UpdateCurrentLayerName(txtLayerName.Text);
btnApply.Enabled = false;
break;
}
}
private void OnFormClosing(object sender, FormClosingEventArgs e)
{
_instance = null;
}