/// <summary>
/// Creates a horizontal (Y axis) measurement cursor.
/// </summary>
private static ScopeCursor CreateYAxisMeasurementCursor(bool isReferenceCursor,
Func <String> valueTextProvider, Color cursorColor
)
{
var cairoColor = CairoHelpers.ToCairoColor(cursorColor);
ScopeCursorMarkers markers;
ScopeVerticalAlignment valueAlignment;
if (isReferenceCursor)
{
markers = ScopeCursorMarkers.YLower;
valueAlignment = ScopeVerticalAlignment.Top;
}
else
{
markers = ScopeCursorMarkers.YUpper;
valueAlignment = ScopeVerticalAlignment.Bottom;
}
return(new ScopeCursor
{
Lines = ScopeCursorLines.Y,
LineWeight = ScopeCursorLineWeight.Medium,
SelectableLines = ScopeCursorLines.Y,
Markers = markers,
Color = cairoColor,
Captions = new []
{
new ScopePositionCaption(valueTextProvider, ScopeHorizontalAlignment.Right, valueAlignment, ScopeAlignmentReference.YPositionAndHorizontalRangeEdge, true, cairoColor),
},
});
}
/// <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 scope graph from a channel configuration and a sample sequence provider.
/// </summary>
private ScopeGraph CreateScopeGraph(ChannelViewModel channelVM, Func <SampleSequence> sampleSequenceProvider)
{
var graphbaseVM = _viewModel.GraphbaseVM;
var triggerPointPosition = graphbaseVM.TriggerVM.HorizontalPosition;
var sampleSequence = sampleSequenceProvider();
return(new ScopeGraph
{
LineType = _graphLineType,
ReferencePointPosition =
new Cairo.PointD(
channelVM.ReferencePointPosition.X + triggerPointPosition,
channelVM.ReferencePointPosition.Y),
Color = CairoHelpers.ToCairoColor(channelVM.Color),
XScaleFactor = channelVM.XScaleFactor,
YScaleFactor = channelVM.YScaleFactor,
ReferencePoint =
new Cairo.PointD(sampleSequence.ReferenceX, _referenceLevel),
Vertices = sampleSequence.Values
.Select((value, counter) => new Cairo.PointD(counter * sampleSequence.SampleInterval * graphbaseVM.ScaleFactor, value)),
});
}
/// <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 }));
}