[Solved] How to get a Preview into a QDialog

[333onlyhalfevil]

Hello everyone:

I'm trying to get one of my scripts to add a preview into a dialog box but it doesn't seem to want to display anything. Note that I'm not necessarily talking about the "preview" in terms of your script showing some entities where your mouse is, for example. I want to show the entities in a qgraphicsview widget within a dialog box. Here's the code I have so far while trying to figure it out myself:

Code: Select all

var previewRMemoryStorage = new RMemoryStorage();
    var previewRSpatialIndexNavel = new RSpatialIndexNavel();
    var previewRDocument = new RDocument(previewRMemoryStorage, previewRSpatialIndexNavel);
    var previewRDocumentInterface = new RDocumentInterface(previewRDocument);
    addRLineEntityToRDocument(previewRDocument, previewRDocumentInterface, previewRLineEntity);
    var previewRGraphicsSceneQt = new RGraphicsSceneQt(previewRDocumentInterface);
    var previewRGraphicsViewImage = new RGraphicsViewImage();
    previewRGraphicsViewImage.setScene(previewRGraphicsSceneQt);
    var previewQPainter = new QPainter();
    previewQPainter.pen = Qt.blue;
    previewQPainter.width = 1;
    previewQPainter.setFont(new QFont("Arial", 30));
    previewRGraphicsViewImage.paintEntities(previewQPainter, new RBox(new RVector(0.4, 129), new RVector(0.63, 171)));
    previewRGraphicsViewImage.repaintView();
    var previewQImage = previewRGraphicsViewImage.getGraphicsBufferWithPreview();
    var previewQGraphicsScene = new QGraphicsScene();
    var previewQPixmap = QPixmap.fromImage(previewQImage);
    previewQGraphicsScene.addPixmap(previewQPixmap);
    previewQWidgets["PreviewQGraphicsView"].setScene(previewQGraphicsScene);

I'm basically creating a dummy document and document interface and adding the line to it, then trying to extract a QImage of the scene out of the dummy document. The above code runs without any errors but the QGraphicsView widget within the dialog box remains blank. Any ideas as to how I could get this to work?

[CVH]

Hi,

I think you may want to investigate how the Hatch dialog works.
That shows a rectangular hatched area.
A view of a limited part of an off-screen document.

The it is quite similar as like creating things on a document.

Regards,
CVH

[333onlyhalfevil]

Yes, this was helpful. I got it working now. Thank you.