B4J Code Snippet Render a Node

Dear community,

here is a snip about NEW rendering of any node in any size you want.
Yery useful: the original Node is not altered.

Works with B4J, not tested with B4A.

Enjoy


[CODE lang="b4x" title="Render"]Private Sub RenderNode (factorX As Double, factorY as Double, sourceView As B4XView) As B4XBitmap

Dim scale As JavaObject
scale.InitializeNewInstance("javafx.scene.transform.Scale", Array(factorX , factorY))

Dim snapParas As JavaObject
snapParas.InitializeNewInstance("javafx.scene.SnapshotParameters",Null)
snapParas.RunMethodJO("setTransform",Array(scale))

Dim nod As JavaObject = sourceView.As(Node)
Dim snapshot As JavaObject = nod.RunMethodJO("snapshot", Array(snapParas,Null))

Return snapshot.As(B4XBitmap)

End Sub[/CODE]

[CODE lang="b4x" title="Usage"]
Dim snap As B4XBitmap = RenderNode(3.0, 3.0, B4XPages.MainPage.Root)

Dim out As OutputStream
out = File.OpenOutput("C:\", "Snap.png", False)
snap.WriteToStream(out, 100, "PNG")
out.Close
[/CODE]

 

[klaus]

If you declare a node (B4J) or a view (B4A and B4i) as a B4XView you have directly the Snapshot property and cross-platform.

 

[Patent]

If you declare a node (B4J) or a view (B4A and B4i) as a B4XView you have directly the Snapshot property and cross-platform.

pay attention to the difference between a snapshot (where you have only the resolution of the screen) and NEW rendering (in larger size ingeniously) and then snap it.

 

[klaus]

I would suggest you to add your comment in the first post and explain the difference.