protected override void OnExecute(XenMessageContext ctx)
{
var request = ctx.Get <DeleteWidgetRequest>();
if (request == null)
{
return;
}
var pair = Surface[request.WidgetId];
if (pair == null)
{
return;
}
if (!pair.XenWidget.CanDelete)
{
return;
}
DesignThread.Invoke(() =>
{
Surface.Remove(request.WidgetId);
});
ctx.SetResponse <OkResponse>(r =>
{
r.Suggest <GetVisualTreeRequest>();
});
}
protected override void OnExecute(XenMessageContext ctx)
{
var request = ctx.Get <LoadProjectRequest>();
if (request == null)
{
return;
}
try
{
Assembly assembly;
var data = Convert.FromBase64String(request.AssemblyData);
Loader.Load(data, out assembly);
}
catch (Exception e)
{
DesignThread.Invoke(() =>
{
App.ConnectionPage.ShowError(e);
});
}
}
protected override void OnExecute(XenMessageContext ctx)
{
var request = ctx.Get <CreateWidgetRequest>();
if (request == null)
{
return;
}
var viewType = TypeFinder.Find(request.TypeName);
if (viewType == null)
{
DesignThread.Invoke(() =>
{
App.ConnectionPage.ShowError($"Unable to create {request.TypeName}. Have you loaded the project assemblies?");
});
return;
}
var view = Activator.CreateInstance(viewType) as View;
if (view == null)
{
DesignThread.Invoke(() =>
{
App.ConnectionPage.ShowError($"Error instantiating {request.TypeName}.");
});
return;
}
var target = Surface[request.ParentId];
if (target == null)
{
return;
}
var attached = false;
DesignThread.Invoke(() =>
{
attached = Surface.SetParent(view, target);
});
if (!attached)
{
return;
}
var pair = Surface[view.Id];
var xamlDefaults = string.Empty;
try
{
var newView = Activator.CreateInstance(viewType) as View;
xamlDefaults = XamlWriter.Save(newView);
}
catch (Exception)
{
// ignored
}
ctx.SetResponse <CreateWidgetResponse>(r =>
{
r.XamlDefaults = new[] { xamlDefaults };
r.Widget = pair.XenWidget;
r.Parent = target.XenWidget;
r.Suggest <GetVisualTreeRequest>();
});
}
protected void SetPropertyValue(string rWidgetId, string[] rPath, object rValue, bool rIsBase64, bool rIsAttachedProperty)
{
var ignoreSet = false;
var targetPropName = XenProperty.GetLastPath(rPath);
var pair = Surface[rWidgetId];
AttachedPropertyInfo targetAttachedProp = null;
XenReflectionProperty targetProp;
if (rIsAttachedProperty)
{
var apAncestors = ElementHelper.GetParents(pair.XenWidget);
var apInfos = new List <AttachedPropertyInfo>();
foreach (var ancestor in apAncestors)
{
var aView = Surface[ancestor.Id];
if (aView == null)
{
continue;
}
apInfos.AddRange(ElementHelper.GetAttachedProperties(aView.VisualElement));
}
if (apInfos.Count == 0)
{
return;
}
targetAttachedProp = apInfos.LastOrDefault(a => a.PropertyName == targetPropName);
if (targetAttachedProp == null)
{
return;
}
object apParent = null;
object apGrandParent = null;
if (apAncestors.ElementAtOrDefault(0) != null)
{
apParent = Surface[apAncestors[0].Id].VisualElement;
}
if (apAncestors.ElementAtOrDefault(1) != null)
{
apGrandParent = Surface[apAncestors[1].Id].VisualElement;
}
targetProp = targetAttachedProp.Convert(apParent, apGrandParent);
}
else
{
targetProp = pair?
.VisualElement?
.GetXenRefProperties(rPath)
.FirstOrDefault();
if (targetProp == null)
{
return;
}
}
if (targetPropName != null && targetPropName.Contains("Color"))
{
rValue = Color.FromHex(rValue.ToString());
}
// todo: make into a serializer
if (targetPropName != null && targetPropName.Contains("Source"))
{
if (!rIsBase64)
{
return;
}
var bytes = Convert.FromBase64String(rValue.ToString());
var src = new XenImageSource(ImageSource.FromStream(() => new MemoryStream(bytes)))
{
FileName = _req.Metadata?.ToString()
};
rValue = src;
}
// get enumeration value
if (targetProp.IsTargetEnum)
{
var eval = ReflectionMethods.CreateEnum(targetProp.TargetType, rValue);
if (eval == null)
{
ignoreSet = true;
}
else
{
rValue = eval;
}
}
if (!ignoreSet)
{
DesignThread.Invoke(() =>
{
// if target property is part of a structure and we're modifying its properties
// 1) make a copy of the current value
// 2) change the property value
// 3) reassign it
if (ReflectionMethods.IsValueType(targetProp.ParentObject))
{
var childProp = targetProp
.ParentObject
.GetXenRefProperties()
.FirstOrDefault(p => p.TargetName == targetPropName);
childProp?.SetTargetObject(rValue);
var copy = childProp?.ParentObject;
var parentInfo = targetProp
.GrandParentObject?
.GetType()
.GetProperty(targetProp.ParentName);
parentInfo?.SetValue(targetProp.GrandParentObject, copy);
// supporting View -> Struct -> Struct -> Target (valuetype or ref)
if (ReflectionMethods.IsValueType(targetProp.GrandParentObject))
{
if (rPath.Length == 3)
{
targetProp
.GrandParentObject?
.GetType()
.GetProperty(targetProp.ParentName)
.SetValue(targetProp.GrandParentObject, targetProp.ParentObject);
pair.VisualElement
.GetType()
.GetProperty(rPath[0])
.SetValue(pair.VisualElement, targetProp.GrandParentObject);
}
}
}
// this is assinging a field
else if (targetProp.IsTargetStruct && rValue is string)
{
var fieldName = rValue.ToString() ?? string.Empty;
var fieldInfo = targetProp.TargetType.GetStaticFields().FirstOrDefault(f => f.Name == fieldName);
if (fieldInfo == null)
{
if (rIsAttachedProperty)
{
SetAttachedProperty(rValue, targetAttachedProp, pair);
}
else
{
targetProp.SetTargetObject(rValue);
}
}
else
{
var copy = fieldInfo.GetValue(null);
if (rIsAttachedProperty)
{
SetAttachedProperty(copy, targetAttachedProp, pair);
}
else
{
targetProp.SetTargetObject(copy);
}
}
}
else
{
// one last attempt
if (rIsAttachedProperty)
{
SetAttachedProperty(rValue, targetAttachedProp, pair);
}
else
{
targetProp.SetTargetObject(rValue);
}
}
});
}
}
protected override void OnExecute(XenMessageContext ctx)
{
var req = ctx.Get <CreateGridRequest>();
if (req == null)
{
return;
}
var target = Surface[req.ParentId];
if (target == null)
{
return;
}
var attached = false;
var rowCollection = new RowDefinitionCollection();
var colCollection = new ColumnDefinitionCollection();
for (var i = 0; i < req.Rows; i++)
{
var row = new RowDefinition();
rowCollection.Add(row);
}
for (var j = 0; j < req.Columns; j++)
{
var col = new ColumnDefinition();
colCollection.Add(col);
}
var view = new Grid
{
RowDefinitions = rowCollection,
ColumnDefinitions = colCollection,
ColumnSpacing = req.ColumnSpacing,
RowSpacing = req.RowSpacing
};
DesignThread.Invoke(() =>
{
attached = Surface.SetParent(view, target);
});
if (!attached)
{
return;
}
var pair = Surface[view.Id];
var xamlDefaults = string.Empty;
try
{
var newGrid = new Grid();
xamlDefaults = XamlWriter.Save(newGrid);
}
catch (Exception)
{
// ignored
}
ctx.SetResponse <CreateWidgetResponse>(res =>
{
res.XamlDefaults = new [] { xamlDefaults };
res.Widget = pair.XenWidget;
res.Parent = target.XenWidget;
res.Suggest <GetVisualTreeRequest>();
});
}
protected override void OnExecute(XenMessageContext ctx)
{
var request = ctx.Get <CreateStackLayoutRequest>();
if (request == null)
{
return;
}
var orientation = StackOrientation.Vertical;
if (string.IsNullOrWhiteSpace(request.Orientation) || request.Orientation.ToLower() == "vertical")
{
orientation = StackOrientation.Vertical;
}
else if (request.Orientation.ToLower() == "horizontal")
{
orientation = StackOrientation.Horizontal;
}
var view = new StackLayout
{
Orientation = orientation,
Spacing = request.Spacing
};
var target = Surface[request.ParentId];
if (target == null)
{
return;
}
var attached = false;
DesignThread.Invoke(() =>
{
attached = Surface.SetParent(view, target);
});
if (!attached)
{
return;
}
var pair = Surface[view.Id];
var xamlDefaults = string.Empty;
try
{
xamlDefaults = XamlWriter.Save(new StackLayout());
}
catch (Exception)
{
// ignored
}
ctx.SetResponse <CreateWidgetResponse>(r =>
{
r.XamlDefaults = new[] { xamlDefaults };
r.Widget = pair.XenWidget;
r.Parent = target.XenWidget;
r.Suggest <GetVisualTreeRequest>();
});
}
