how to retrieve the size of diagram?

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joewjz85

hi,
do anyone know how to retrieve the height&width of diagram? my web application could not get the process diagram corresponding to the diagram frame size once i click the button to show process diagram, but when i do it again, it could be displayed normally.
just don't want to make every diagram with a fixed size, how to use the API to solve this problem?

some of the APIs related to Diagram:
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DiagramEdge
DiagramEdgeWaypoint
DiagramElement
DiagramLayout
DiagramNode

jbarrez

It probably depends on your web ui framework, but here is how we do it in Explorer:

<br>&nbsp;&nbsp;&nbsp;&nbsp; StreamResource diagram = new ProcessDefinitionImageStreamResourceBuilder()<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .buildStreamResource(processInstance, repositoryService, runtimeService);<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Embedded embedded = new Embedded(null, diagram);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; embedded.setType(Embedded.TYPE_IMAGE);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; embedded.setSizeUndefined();<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Panel imagePanel = new Panel(); // using panel for scrollbars<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; imagePanel.setScrollable(true);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; imagePanel.addStyleName(Reindeer.PANEL_LIGHT);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; imagePanel.setWidth(100, UNITS_PERCENTAGE);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; imagePanel.setHeight(400, UNITS_PIXELS);<br>
As you can see, the height is fixed. Vaadin then resizes the diagram using the available space.