static void OnAttributesChange(DependencyObject o, DependencyPropertyChangedEventArgs args)
{
HoverResults hr = o as HoverResults;
if (hr == null)
{
return;
}
hr.Graphic = hr.Layer.Graphics.FirstOrDefault(item => item.Attributes == hr.Attributes); //null or matching graphic
#if DEBUG
if (hr.Attributes == null)
{
Debug.WriteLine(string.Format("@@Change, NULL, {0}", MapApplication.GetLayerName(hr.Layer)));
}
else if (hr.Attributes.ContainsKey("NAME"))
{
Debug.WriteLine(string.Format("@@Change, {0}, {1}", hr.Attributes["NAME"], MapApplication.GetLayerName(hr.Layer)));
}
else
{
Debug.WriteLine(string.Format("@@Change (no NAME field), {0}", MapApplication.GetLayerName(hr.Layer)));
}
#endif
PositionMapTip.rebuildMapTipContentsBasedOnFieldVisibility(hr);
}
private void attachApplicationMapTipToLayer(GraphicsLayer layer, Graphic g)
{
#if DEBUG
Debug.WriteLine(string.Format("@@Attaching map tip to layer: {0}", MapApplication.GetLayerName(layer)));
#endif
// Create a new control each time a popup is to be displayed. This is to reset the controls to their
// initial state. If this is not done, and you have controls like ToggleButtons, they may retain their
// expanded or collapsed state even though binding is supposed to reset this. This way, you have a
// consistent starting point for the display of a popup.
HoverResults hoverResults = new HoverResults()
{
Style = HoverLayoutStyleHelper.Instance.GetStyle("HoverPopupContainerStyle"),
Layer = layer,
Graphic = g,
Map = AssociatedObject
};
// Associate map tip control with layer
layer.MapTip = hoverResults;
layer.MapTip.SizeChanged -= MapTip_SizeChanged;
layer.MapTip.SizeChanged += MapTip_SizeChanged;
// re-establish delay
TimeSpan delay = (TimeSpan)AssociatedObject.GetValue(DelayMapTipHide.HideDelayProperty);
layer.MapTip.SetValue(GraphicsLayer.MapTipHideDelayProperty, delay);
}
// Get mouse position
void GraphicsLayer_MouseEnterOrMove(object sender, GraphicMouseEventArgs args)
{
_mousePos = args.GetPosition(AssociatedObject);
GraphicsLayer graphicsLayer = sender as GraphicsLayer;
#if DEBUG
if (args.Graphic != null)
{
if (args.Graphic.Symbol is ESRI.ArcGIS.Client.Clustering.FlareSymbol)
{
Debug.WriteLine(string.Format("@@MouseEnter/Move, flare, {0}", MapApplication.GetLayerName(graphicsLayer)));
}
else if (args.Graphic.Attributes.ContainsKey("NAME"))
{
Debug.WriteLine(string.Format("@@MouseEnter/Move, {0}, {1}", args.Graphic.Attributes["NAME"], MapApplication.GetLayerName(graphicsLayer)));
}
else
{
Debug.WriteLine(string.Format("@@MouseEnter/Move, no NAME field, {0}", MapApplication.GetLayerName(graphicsLayer)));
}
}
#endif
if (ESRI.ArcGIS.Client.Extensibility.LayerProperties.GetIsPopupEnabled(graphicsLayer))
{
if (!ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetPopUpsOnClick(graphicsLayer))
{
HoverResults hoverResults = graphicsLayer.MapTip as HoverResults;
if (graphicsLayer.MapTip == null) //if not a custom map tip
{
//if first time, attach map tip to layer
attachApplicationMapTipToLayer(graphicsLayer, args.Graphic);
hoverResults = graphicsLayer.MapTip as HoverResults;
}
//if map tip dirty, rebuild map tip
if (hoverResults != null)
{
if (ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetIsMapTipDirty(graphicsLayer) &&
args.Graphic == hoverResults.Graphic)
{
rebuildMapTipContentsBasedOnFieldVisibility(hoverResults);
}
//clear map tip dirty flag
ESRI.ArcGIS.Mapping.Core.LayerExtensions.SetIsMapTipDirty(graphicsLayer, false);
}
}
else
{
graphicsLayer.MapTip = null;
}
}
else if (graphicsLayer.MapTip is HoverResults)
{
graphicsLayer.MapTip = null;
}
}
static void OnPopupInfoChange(DependencyObject o, DependencyPropertyChangedEventArgs args)
{
HoverResults hr = o as HoverResults;
PopupInfo oldPopupInfo = args.OldValue as PopupInfo;
if (oldPopupInfo != null)
{
hr.attributeChangeEventHookups(oldPopupInfo, false);
}
if (hr.PopupInfo != null)
{
hr.attributeChangeEventHookups(hr.PopupInfo, true);
}
if (hr.PopUpContainer != null)
{
hr.PopUpContainer.DataContext = hr.PopupInfo;
}
}
// Position and size MapTip
void MapTip_SizeChanged(object sender, SizeChangedEventArgs e)
{
if (AssociatedObject == null)
{
return;
}
HoverResults mapTip = sender as HoverResults;
if (mapTip == null)
{
return;
}
// Determine what quadrant of the Map the mouse is in
bool upper = _mousePos.Y < AssociatedObject.ActualHeight / 2;
bool right = _mousePos.X > AssociatedObject.ActualWidth / 2;
if (mapTip.ActualHeight > 0)
{
double horizontalOffset;
double verticalOffset;
// Calculate max dimensions and offsets for MapTip
verticalOffset = upper ? 0 : (int)(0 - mapTip.ActualHeight);
horizontalOffset = right ? (int)(0 - mapTip.ActualWidth) : 0;
// Apply dimensions and offsets
double maxHeight;
double maxWidth;
maxHeight = upper ? AssociatedObject.ActualHeight - _mousePos.Y - Margin : _mousePos.Y - Margin;
maxWidth = right ? _mousePos.X - Margin : AssociatedObject.ActualWidth - _mousePos.X - Margin;
mapTip.MaxHeight = maxHeight;
mapTip.MaxWidth = maxWidth;
mapTip.SetValue(GraphicsLayer.MapTipHorizontalOffsetProperty, horizontalOffset);
mapTip.SetValue(GraphicsLayer.MapTipVerticalOffsetProperty, verticalOffset);
}
}
internal static void rebuildMapTipContentsBasedOnFieldVisibility(HoverResults results)
{
HoverResults hr = results as HoverResults;
if (hr == null)
{
return;
}
GraphicsLayer hrLayer = hr.Layer;
if (hr.Graphic == null || hr.Graphic.Attributes == null || hrLayer == null)
{
hr.Visibility = Visibility.Collapsed;
return;
}
Visibility hrVisibility = Visibility.Visible;
IEnumerable <FieldInfo> fields = ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetFields(hrLayer); // Store the fields on the Map Tips element
string displayField = ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetDisplayField(hrLayer);
if (string.IsNullOrEmpty(displayField))
{
displayField = FieldInfo.GetDefaultDisplayField(fields);
ESRI.ArcGIS.Mapping.Core.LayerExtensions.SetDisplayField(hrLayer, displayField);
}
Graphic popupGraphic = hr.Graphic;
PopupItem popupItem = new PopupItem()
{
DataTemplate = null,
Graphic = popupGraphic,
Layer = hrLayer,
LayerName = ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetLayerName(hrLayer),
Title = null,
TitleExpression = null,
};
popupItem.FieldInfos = MapTipsHelper.ToFieldSettings(ESRI.ArcGIS.Mapping.Core.LayerExtensions.GetFields(hrLayer));
MapTipsHelper.GetTitle(popupItem, null);
bool hasContent = false;
popupItem.DataTemplate = MapTipsHelper.BuildMapTipDataTemplate(popupItem, out hasContent);
if (!hasContent)
{
popupItem.DataTemplate = null;
}
ESRI.ArcGIS.Client.Extensibility.PopupInfo popupInfo = new ESRI.ArcGIS.Client.Extensibility.PopupInfo()
{
AttributeContainer = hr.AttributeContainer,
Container = hr,
PopupItem = popupItem
};
hr.PopupInfo = popupInfo;
bool hasTitle = !string.IsNullOrEmpty(popupInfo.PopupItem.Title);
if (hasTitle || hasContent)
{
hrVisibility = Visibility.Visible;
// re-establish delay
TimeSpan delay = (TimeSpan)hr.Map.GetValue(DelayMapTipHide.HideDelayProperty);
hrLayer.MapTip.SetValue(GraphicsLayer.MapTipHideDelayProperty, delay);
}
else
{
hrVisibility = Visibility.Collapsed;
}
hr.Visibility = hrVisibility;
}