Graphical Modeling Framework Runtime - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 479

<extension
point="org.eclipse.ui.views.properties.tabbed.propertySections">
<propertySections contributorId="org.eclipse.mindmap.diagram">
<propertySection
id="property.section.domain"
tab="property.tab.domain"
class=
"org.eclipse.mindmap.diagram.sheet.MindmapPropertySection">
<input type="org.eclipse.gef.EditPart"/>
</propertySection>
</propertySections>
</extension>
We can easily configure additional provided property tabs and content con-
tribution. Take a look at generated diagram code to see the contribution of visual
property tabs and content for diagram appearance, rulers, grid, and so on.
10.8.3 Connections
We need to provide linking between Topic elements to establish subtopic rela-
tionships. We begin by extending our paletteProviders contribution to
include a link drawer and tool, as seen here:
<entry id="linkDrawer"
label="%palette.link.drawer.label"
kind="drawer"
description="%palette.link.drawer.desc"
path="/"
small_icon="icons/obj16/Link.gif">
<expand>
<content/>
</expand>
</entry>
<entry id="Subtopic"
label="%palette.link.label"
kind="tool"
description="%palette.link.desc"
path="/linkDrawer/"
small_icon="icons/obj16/Link.gif"/>
Next, we revisit our MindmapPaletteFactory to add the corresponding
tool for this palette entry. This time, we use the ConnectionCreationTool ,
passing our soon-to-be-created SUBTOPIC element type.
public Tool createTool(String toolId) {
if (toolId.equals("Topic")) {
return new CreationTool(MindmapElementTypes.TOPIC);