Mouse hover event on nodes

[Hikmet Emre Kaya]

Hello,

I know this was asked quite some time ago, but I was wondering if there is a way to show additional info on nodes when the mouse cursor hovers over them. Has there been any updates on this? Thanks!

[Mike Kucera]

You can use the Node Tooltip Visual Property to show a piece of text when the mouse cursor hovers over a node.

On Thu, Jun 30, 2022 at 5:21 AM Hikmet Emre Kaya <hikmete...@gmail.com> wrote:

Hello,

I know this was asked quite some time ago, but I was wondering if there is a way to show additional info on nodes when the mouse cursor hovers over them. Has there been any updates on this? Thanks!

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[Hikmet Emre Kaya]

Hello Mike,

Thank you for the response. I tried the following method, but have not achieved success:

                    CyNode node = ..
                    CyEventHelper eventHelper = CyActivator.cyEventHelper;
                    eventHelper.flushPayloadEvents();
                    View<CyNode> nodeView = networtkView.getNodeView(node);
                    nodeView.setVisualProperty(BasicVisualLexicon.NODE_TOOLTIP, "some string");

networkView.updateView

I also added the following dependency to my pom.xml

<dependency> <groupId>org.cytoscape</groupId> <artifactId>presentation-api</artifactId> </dependency>

not sure what I am missing.

[Mike Kucera]

You are probably running into a common issue... generally Apps should not use nodeView.setVisualProperty(), because when anything in the current style changes the style gets re-applied and that overwrites all visual properties that were set using setVisualProperty().

You have two options...

1) Use nodeView.setLockedValue() instead. This is for setting bypasses on individual nodes.

2) Create a mapping in the current style. This is the preferred way if the text you want to show comes from a table column. Create a PassthroughMapping to the column that contains the tooltips and add it to the current style.

Mike.

To view this discussion on the web visit https://groups.google.com/d/msgid/cytoscape-app-dev/177bc71c-aaec-4424-a6f0-12e79733cdd1n%40googlegroups.com.