public void set_MapLayer(int layerHandle, bool noSelectedShapes = true, bool refreshLayerList = false)
{
_currentMapLayer = _mapLayerDictionary[layerHandle];
if (_currentMapLayer.LayerType == "ShapefileClass")
{
_sfLabelHandler = new ShapefileLabelHandler(_currentMapLayer);
_sfSymbologyHandler = new PointLayerSymbologyHandler(_currentMapLayer);
if (noSelectedShapes)
{
((Shapefile)_currentMapLayer.LayerObject).SelectNone();
}
}
//if there are listeners to the event
if (CurrentLayer != null)
{
//fill up the event argument class with the layer item
LayerEventArg lp = new LayerEventArg(_currentMapLayer.Handle, _currentMapLayer.Name, _currentMapLayer.Visible, _currentMapLayer.VisibleInLayersUI, _currentMapLayer.LayerType);
CurrentLayer(this, lp);
}
if (refreshLayerList)
{
RefreshLayers();
}
}
/// <summary>
/// save additional map options including AvoidCollision which is not saved by SaveMapState
/// </summary>
private void SaveOtherMapOptions()
{
for (int n = 0; n < _axmap.NumLayers; n++)
{
var h = _axmap.get_LayerHandle(n);
if (_mapLayerDictionary[h].LayerType == "ShapefileClass")
{
var sf = _axmap.get_Shapefile(h);
if (sf.Labels.Count > 0)
{
ShapefileLabelHandler.SaveLabelParameters(_fileMapState, h, sf.Labels.AvoidCollisions);
}
}
}
}
/// <summary>
/// Load map layers from XML file generated by axmap.SaveMapState.
///
/// Layers are added to the map and is followed by restoring the map extent.
/// The first added layer automatically sets the map control's projection.
/// </summary>
/// <param name="restoreMapState">
/// When restoreMapState:true, map state is restored
/// We use restoreMapState:false to load the layers but not restore axMap extent.
/// </param>
public void LoadMapState(bool restoreMapState = true)
{
_fileMapState = $@"{global.ApplicationPath}\mapstate";
if (File.Exists(_fileMapState))
{
var doc = new XmlDocument();
var proceed = true;
var fileName = "";
try
{
doc.Load(_fileMapState);
}
catch (XmlException ex)
{
Logger.Log(ex.Message);
proceed = false;
}
if (proceed)
{
foreach (XmlNode ly in doc.DocumentElement.SelectNodes("//Layer"))
{
fileName = ly.Attributes["Filename"].Value;
var isVisible = true;
isVisible = ly.Attributes["LayerVisible"]?.Value == "1";
if (ly.Attributes["LayerType"].Value == "Shapefile")
{
var sf = new Shapefile();
if (sf.Open(fileName))
{
var h = AddLayer(sf, ly.Attributes["LayerName"].Value, isVisible);
_sfSymbologyHandler.SymbolizeLayer(ly.InnerXml);
_currentMapLayer.Visible = ly.Attributes["LayerVisible"].Value == "1";
_sfLabelHandler = new ShapefileLabelHandler(_currentMapLayer);
if (ly.FirstChild.Name == "ShapefileClass")
{
foreach (XmlNode child in ly.FirstChild.ChildNodes)
{
if (child.Name == "LabelsClass" && child.Attributes["Generated"].Value == "1")
{
_currentMapLayer.IsLabeled = child.Attributes["Generated"].Value == "1";
_sfLabelHandler.LabelShapefile(child.OuterXml);
}
}
}
}
}
else if (ly.Attributes["LayerType"].Value == "Image")
{
//code when layertype is image
var img = new MapWinGIS.Image();
if (img.Open(fileName))
{
var h = AddLayer(img, ly.Attributes["LayerName"].Value, isVisible);
}
}
}
if (restoreMapState)
{
//We restore saved extent of the map but not the projection. Since layers
//were already added to the map, the first layer sets the map's projection.
foreach (XmlNode ms in doc.DocumentElement.SelectNodes("//MapState "))
{
var ext = new Extents();
ext.SetBounds(
double.Parse(ms.Attributes["ExtentsLeft"].Value),
double.Parse(ms.Attributes["ExtentsBottom"].Value),
0,
double.Parse(ms.Attributes["ExtentsRight"].Value),
double.Parse(ms.Attributes["ExtentsTop"].Value),
0);
_axmap.Extents = ext;
_axmap.ExtentPad = double.Parse(ms.Attributes["ExtentsPad"].Value);
}
}
}
}
else
{
File.Create(_fileMapState);
}
}