topic Re: Delete some scene image in Java Maps SDK Questions

Delete some scene image

VanyaIvanov — Fri, 03 Sep 2021 08:41:33 GMT

I want to delete any scene image by clicking on it or nearby. How can i do it?

For example i have a method for adding an image to the Scene

public void AddImage(String imgPath, double longitude, double latitude) {
    GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
    sceneView.getGraphicsOverlays().add(graphicsOverlay);

    PictureMarkerSymbol markerSymbol = new PictureMarkerSymbol(imgPath);

    markerSymbol.setHeight(20);
    markerSymbol.setWidth(20);

    markerSymbol.loadAsync();

    markerSymbol.addDoneLoadingListener(() -> {
        if (markerSymbol.getLoadStatus() == com.esri.arcgisruntime.loadable.LoadStatus.LOADED) {
            com.esri.arcgisruntime.geometry.Point symbolPoint = new com.esri.arcgisruntime.geometry.Point(longitude, latitude, SpatialReferences.getWgs84());
            Graphic symbolGraphic = new Graphic(symbolPoint, markerSymbol);
            graphicsOverlay.getGraphics().add(symbolGraphic);
            sceneView.getGraphicsOverlays().add(graphicsOverlay);

        } else {
            System.out.println("Failed to load: " + markerSymbol.getLoadError().getCause());
        }
    });
}

Also i want to have a method to delete image from the Scene by clicking button Delete and clicking on that image icon on the Scene after that.

public void DeleteBtn_Click(javafx.event.ActionEvent actionEvent) {
    sceneView.setInteractionListener(new SceneView.DefaultInteractionListener(sceneView) {
        public void onMousePressed(javafx.scene.input.MouseEvent e) {
            javafx.geometry.Point2D screenPoint = new javafx.geometry.Point2D(Math.round(e.getX()),
                    Math.round(e.getY()));
            DeleteImage(screenPoint);///so i need a method that get screenPoint and deletes an image near the screenPoint coordinates
        }
    });

}

So i need a method that gets javafx.geometry.Point2D point and deletes an image located near the coordinates of this point. I didnt find any java arcgis api functions suitable for this.

Re: Delete some scene image

VanyaIvanov — Thu, 11 Nov 2021 07:43:54 GMT

Im my case i used delete button on the interface

boolean isDeleteElement = false;
@FXML
private void DeleteElementbyClick()
{
    if(isDeleteElement ==true)
    {
        isDeleteElement = false;
    }
    else {
        isDeleteElement = true;
    }
}

//And i used the mouse handler for deleting clicked object from the scene
sceneView.setInteractionListener(new SceneView.DefaultInteractionListener(sceneView)
{

public void onMousePressed(javafx.scene.input.MouseEvent e)
{

if(e.getButton() == MouseButton.PRIMARY) {


if(isDeleteElement ==true)
{
javafx.geometry.Point2D screenPoint = new javafx.geometry.Point2D(Math.round(e.getX()),
Math.round(e.getY()));
com.esri.arcgisruntime.geometry.Point surfacePoint = sceneView.screenToBaseSurface(screenPoint);


// identify graphics on the graphics overlay
identifyGraphics = sceneView.identifyGraphicsOverlayAsync(graphicsOverlay, screenPoint, 10, false);
identifyGraphics.addDoneListener(() -> {

try {
// get the list of graphics returned by identify
IdentifyGraphicsOverlayResult result = identifyGraphics.get();
List<Graphic> graphics = result.getGraphics();

if (!graphics.isEmpty()) {

for(int i = 0; i<graphics.size(); i++) {

if(myGraphics.contains(graphics.get(i))) {
for (int j = 0; j < myGraphics.size(); j++)
graphicsOverlay.getGraphics().remove(myGraphics.get(j));
myGraphics.clear();
}
else {
graphicsOverlay.getGraphics().remove(graphics.get(i));//just delete a part of the complex graphic object you clicked on by mouse
}

}
}
}
catch (Exception ex) {
ex.printStackTrace();
}
});
} 
}
else {
// let the default listener you've overridden deal with other events
super.onMousePressed(e);
}
}

myGraphic is an ArrayList<Graphic> that contains all graphic elements of some graphical object you want to delete(for example trapezium that consists of 4 lines).