public async Task <string> GetPlotPreview(ClientPlotSettings settings)
{
var htmlDialogService = (HtmlDialogService)Workspace.DialogService;
var viewModel = (SvgPlotterViewModel)htmlDialogService.CreateAndPopulateViewModel(settings, Workspace.Drawing.Settings, plotTypeOverride: "svg"); // force to svg for preview
viewModel.PlotAsDocument = false;
viewModel.OutputWidth = settings.PreviewMaxSize;
viewModel.OutputHeight = settings.PreviewMaxSize;
if (settings.Width > settings.Height)
{
// keep width, reset height
viewModel.OutputHeight = settings.Height / settings.Width * settings.PreviewMaxSize;
}
else
{
// keep height, reset width
viewModel.OutputWidth = settings.Width / settings.Height * settings.PreviewMaxSize;
}
var drawing = Workspace.Drawing.UpdateColors(settings.ColorType);
using (var stream = await htmlDialogService.PlotToStream(viewModel, drawing, Workspace.ActiveViewPort))
using (var reader = new StreamReader(stream))
{
var contents = await reader.ReadToEndAsync();
return(contents);
}
}
public ViewPortViewModelBase CreateAndPopulateViewModel(ClientPlotSettings settings, DrawingSettings drawingSettings, string plotTypeOverride = null)
{
ViewPortViewModelBase viewModel = null;
switch (plotTypeOverride ?? settings.PlotType)
{
case "pdf":
var pdfViewModel = (PdfPlotterViewModel)_pdfPlotterFactory.CreatePlotterViewModel();
pdfViewModel.DisplayWidth = settings.Width;
pdfViewModel.DisplayHeight = settings.Height;
viewModel = pdfViewModel;
break;
case "svg":
var svgViewModel = (SvgPlotterViewModel)_svgPlotterFactory.CreatePlotterViewModel();
svgViewModel.PlotAsDocument = true;
svgViewModel.DisplayWidth = settings.Width;
svgViewModel.DisplayHeight = settings.Height;
svgViewModel.OutputWidth = settings.Width;
svgViewModel.OutputHeight = settings.Height;
viewModel = svgViewModel;
break;
}
if (viewModel is object)
{
var transform = _workspace.ActiveViewPort.GetTransformationMatrixWindowsStyle(Agent.Width, Agent.Height).Inverse();
var topLeft = transform.Transform(settings.Viewport.TopLeft.ToPoint());
var bottomRight = transform.Transform(settings.Viewport.BottomRight.ToPoint());
viewModel.ViewPortType = settings.ViewPortType;
viewModel.ScalingType = settings.ScalingType;
var(scaleA, scaleB) = settings.GetUnitAdjustedScale(drawingSettings);
viewModel.ScaleA = scaleA;
viewModel.ScaleB = scaleB;
viewModel.BottomLeft = new Point(topLeft.X, bottomRight.Y, 0.0);
viewModel.TopRight = new Point(bottomRight.X, topLeft.Y, 0.0);
}
return(viewModel);
}