public void Invoke()
{
_lastStartFreq = _adapter.StartFreqInMHz;
_lastEndFreq = _adapter.EndFreqInMHz;
var width = _adapter.ScreenWidth;
var factor = new Func <double, double>(x => x * (_lastEndFreq - _lastStartFreq) / width + _lastStartFreq);
var nextStart = factor.Invoke(_startX);
var nextEnd = factor.Invoke(_endX);
_adapter.StartFreqInMHz = nextStart;
_adapter.EndFreqInMHz = nextEnd;
_canvasView.InvokeAsync(_canvasView.ClearLine);
}
public DisplayAdapterV2([NotNull] CanvasView wavefromView, HorizontalAxisView horizontalAxisView,
VerticalAxisView verticalAxisView, TextBox tbXCoordinate, TextBox tbDistance, int dispPointNum,
double samplingRate, int startFreqInMHz,
int endFreqInMHz)
{
WavefromView = wavefromView;
WavefromView.Reload(); // todo move out, and use a event
DispPointsCnt = dispPointNum;
Axis = new AxisBuilder(WavefromView);
_horizontalAxisView = horizontalAxisView;
VerticalAxisView = verticalAxisView;
SampleRateInMHz = samplingRate / 1e6;
StartFreqInMHz = startFreqInMHz;
EndFreqInMHz = endFreqInMHz;
var eventLayer = EventLayer.Setup(wavefromView.Canvas);
eventLayer.ZoomEvent += (start, end, valid) => {
if (valid)
{
var zoomCommand = new ZoomCommand(start, end, WavefromView, this);
_cmdStack.Push(zoomCommand);
zoomCommand.Invoke();
ResetXYScales();
}
else
{
WavefromView.ClearLine();
}
};
TextBlock pop = null;
eventLayer.FollowTraceEvent += (last, curr, mouseDown) => {
var xOnAxis = GetXValueByPointPosition(curr.X);
tbXCoordinate.Text = xOnAxis.ToString("F5");
if (pop == null)
{
pop = WavefromView.DrawText(curr.X + 4, curr.Y - 12, xOnAxis.ToString("F3"));
}
else
{
Canvas.SetTop(pop, curr.Y - 12);
Canvas.SetLeft(pop, curr.X + 4);
pop.Text = xOnAxis.ToString("F3");
}
if (mouseDown)
{
var xStart = GetXValueByPointPosition(eventLayer.MouseDownStart);
var xDelta = xOnAxis - xStart;
tbDistance.Text = xDelta.ToString("F5");
}
if (mouseDown)
{
WavefromView.InvokeAsync(() => {
var pointCollection = new PointCollection(2)
{
last, curr
};
WavefromView.DrawLine(pointCollection, Colors.Yellow);
});
}
};
eventLayer.AdjustYAxisEvent += ResetXYScales;
eventLayer.UndoEvent += () => {
if (_cmdStack.IsEmpty())
{
StartFreqInMHz = startFreqInMHz;
EndFreqInMHz = endFreqInMHz; // todo hard coded
}
else
{
var zoomCommand = _cmdStack.Pop();
zoomCommand.Undo();
}
ResetXYScales();
};
WavefromView.DrawGrid();
}