/// <summary>
/// Creates a reference line cursor for a single channel.
/// </summary>
internal static BoundCursor CreateChannelReferenceCursor(ChannelViewModel channelVM)
{
var channelCaption = channelVM.Caption;
var channelColor = CairoHelpers.ToCairoColor(channelVM.Color);
var cursor = new ScopeCursor
{
Lines = ScopeCursorLines.Y,
LineWeight = ScopeCursorLineWeight.Low,
SelectableLines = ScopeCursorLines.Y,
Markers = ScopeCursorMarkers.YFull,
Color = channelColor,
Captions = new []
{
new ScopePositionCaption(() => channelCaption, ScopeHorizontalAlignment.Left, ScopeVerticalAlignment.Bottom, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, channelColor),
new ScopePositionCaption(() => channelCaption, ScopeHorizontalAlignment.Right, ScopeVerticalAlignment.Bottom, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, channelColor),
},
};
// === Create bindings. ===
// Bind the cursor's position.
var binding = PB.Binding.Create(() => cursor.Position.Y == channelVM.ReferencePointPosition.Y);
return(new BoundCursor(cursor, new [] { binding }));
}
/// <summary>
/// Creates a trigger criteria cursor for a level-based trigger.
/// </summary>
private static BoundCursor CreateTriggerCriteriaCursor(
char triggerModeSymbol,
Func <double> valueProvider,
Func <ScopeCursor, ValueConverter <double, double>, PB.Binding> valueBindingProvider,
Func <double> valueScaleFactorProvider,
Func <double> referencePointPositionProvider,
Func <double> referenceLevelProvider,
string baseUnitString,
Color levelColor,
IEnumerable <INotifyPropertyChanged> influencingObjects)
{
var triggerCaption = string.Format("{0}{1}", _triggerSymbol, triggerModeSymbol);
Func <String> levelTextProvider = () =>
UnitHelper.BuildValueText(baseUnitString, valueProvider());
var cairoColor = CairoHelpers.ToCairoColor(levelColor);
var cursor = new ScopeCursor
{
Lines = ScopeCursorLines.Y,
LineWeight = ScopeCursorLineWeight.Low,
SelectableLines = ScopeCursorLines.Y,
Markers = ScopeCursorMarkers.YFull,
Color = cairoColor,
Captions = new []
{
new ScopePositionCaption(() => triggerCaption, ScopeHorizontalAlignment.Left, ScopeVerticalAlignment.Bottom, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, cairoColor),
new ScopePositionCaption(() => triggerCaption, ScopeHorizontalAlignment.Right, ScopeVerticalAlignment.Bottom, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, cairoColor),
new ScopePositionCaption(levelTextProvider, ScopeHorizontalAlignment.Right, ScopeVerticalAlignment.Top, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, cairoColor),
},
};
// === Create value converters. ===
var valueConverter = new ValueConverter <double, double>(
val => (val - referenceLevelProvider()) * valueScaleFactorProvider() + referencePointPositionProvider(),
val => ((val - referencePointPositionProvider()) / valueScaleFactorProvider()) + referenceLevelProvider());
// === Create bindings. ===
// Bind the cursor's position.
var binding = valueBindingProvider(cursor, valueConverter);
// The trigger cursor's position depends on some additional values (except the primary value
// it is bound to). Update it if any of these values changes. ===
influencingObjects.ForEachDo(influencingObject =>
{
influencingObject.PropertyChanged += (sender, e) =>
{
PB.Binding.InvalidateMember(() => valueConverter.DerivedValue);
};
});
return(new BoundCursor(cursor, new [] { binding }));
}
/// <summary>
/// Creates a trigger point cursor.
/// </summary>
internal static BoundCursor CreateTriggerPointCursor(GraphbaseViewModel graphbaseVM)
{
var triggerVM = graphbaseVM.TriggerVM;
Func <String> triggerStateCaptionProvider = () =>
triggerVM.State == TriggerState.Armed ? _armedCaption
: triggerVM.State == TriggerState.Triggered ? _triggeredCaption
: "";
Func <String> positionTextProvider = () =>
UnitHelper.BuildValueText(graphbaseVM.BaseUnitString,
triggerVM.HorizontalPosition / graphbaseVM.ScaleFactor);
var markerColor = CairoHelpers.ToCairoColor(graphbaseVM.Color);
var cursor = new ScopeCursor
{
Lines = ScopeCursorLines.X,
LineWeight = ScopeCursorLineWeight.Low,
SelectableLines = ScopeCursorLines.X,
Markers = ScopeCursorMarkers.XFull,
Color = markerColor,
Captions = new []
{
new ScopePositionCaption(triggerStateCaptionProvider, ScopeHorizontalAlignment.Left, ScopeVerticalAlignment.Top, ScopeAlignmentReference.XPositionAndVerticalRangeEdge, true, markerColor),
new ScopePositionCaption(triggerStateCaptionProvider, ScopeHorizontalAlignment.Left, ScopeVerticalAlignment.Bottom, ScopeAlignmentReference.XPositionAndVerticalRangeEdge, true, markerColor),
new ScopePositionCaption(positionTextProvider, ScopeHorizontalAlignment.Right, ScopeVerticalAlignment.Top, ScopeAlignmentReference.XPositionAndVerticalRangeEdge, true, markerColor),
},
};
// === Create bindings. ===
// Bind the cursor's position.
var binding = PB.Binding.Create(() => cursor.Position.X == triggerVM.HorizontalPosition);
return(new BoundCursor(cursor, new [] { binding }));
}
/// <summary>
/// Initializes a new instance of this class.
/// </summary>
/// <param name="embeddedCursor">The cursor embedded in this object.</param>
/// <param name="bindings">The bindings used by this object.</param>
public BoundCursor(ScopeCursor embeddedCursor, IEnumerable <PB.Binding> bindings)
{
EmbeddedCursor = embeddedCursor;
_bindings = bindings;
}
