Hello everyone,
I try to experiment with Graphiti, before starting a real project.
I've created a new plug-in project like described in the Graphiti-tutorial with the following steps:
Created new plug-in project with the name org.eclipse.graphiti.test.
Referenced the following plugins: org.eclipse.graphiti, org.eclipse.graphiti.ui, org.eclipse.graphiti.examples.common, org.eclipse.core.resources, org.eclipse.core.runtime, org.eclipse.ui.views.properties.tabbed
Created a new class (ProjectDiagramTypeProvider) and implemented it as follows:
package org.eclipse.graphiti.test.diagram;
import org.eclipse.graphiti.dt.AbstractDiagramTypeProvider;
public class ProjectDiagramTypeProvider extends AbstractDiagramTypeProvider {
public ProjectDiagramTypeProvider() {
super();
}
}
Created a new XML document plugin.xml and registered the Diagram Type Provider and Diagram Type as you can see in the following code:
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
<extension
point="org.eclipse.graphiti.ui.diagramTypes">
<diagramType
description="This is the diagram type for my Graphiti project"
id="org.eclipse.graphiti.test.diagram.ProjectDiagramType"
name="My Graphiti Project Diagram Type"
type="project">
</diagramType>
</extension>
<extension
point="org.eclipse.graphiti.ui.diagramTypeProviders">
<diagramTypeProvider
class="org.eclipse.graphiti.test.diagram.ProjectDiagramTypeProvider"
description="This is my first editor for the Graphiti Project"
id="org.eclipse.graphiti.test.diagram.MyTutorialDiagramTypeProvider"
name="My project editor">
<diagramType
id="org.eclipse.graphiti.test.diagram.ProjectDiagramType">
</diagramType>
</diagramTypeProvider>
</extension>
</plugin>
Created a Feature Provider with the following code:
package org.eclipse.graphiti.test.diagram;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.graphiti.dt.IDiagramTypeProvider;
import org.eclipse.graphiti.features.IAddFeature;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.test.features.ProjectAddEClassFeature;
import org.eclipse.graphiti.ui.features.DefaultFeatureProvider;
public class ProjectFeatureProvider extends DefaultFeatureProvider {
public ProjectFeatureProvider(IDiagramTypeProvider dtp) {
super(dtp);
}
}
Made the ProjectFeatureProvider known to the ProjectDiagramProvider, with the following implementation:
package org.eclipse.graphiti.test.diagram;
import org.eclipse.graphiti.dt.AbstractDiagramTypeProvider;
public class ProjectDiagramTypeProvider extends AbstractDiagramTypeProvider {
public ProjectDiagramTypeProvider() {
super();
// set the feature provider
setFeatureProvider(new ProjectFeatureProvider(this));
}
}
Created a Add Feature with a simple RoundedRectangle (without text and a line), see the following code:
package org.eclipse.graphiti.test.features;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.features.impl.AbstractAddShapeFeature;
import org.eclipse.graphiti.mm.algorithms.RoundedRectangle;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.graphiti.services.IGaService;
import org.eclipse.graphiti.services.IPeCreateService;
import org.eclipse.graphiti.util.ColorConstant;
import org.eclipse.graphiti.util.IColorConstant;
public class ProjectAddEClassFeature extends AbstractAddShapeFeature {
private static final IColorConstant CLASS_FOREGROUND =
new ColorConstant(255, 102, 0);
public ProjectAddEClassFeature(IFeatureProvider fp) {
super(fp);
}
public boolean canAdd(IAddContext context) {
// check if user wants to add a EClass
if (context.getNewObject() instanceof EClass) {
// check if user wants to add to a diagram
if (context.getTargetContainer() instanceof Diagram) {
return true;
}
}
return false;
}
public PictogramElement add(IAddContext context) {
EClass addedClass = (EClass) context.getNewObject();
Diagram targetDiagram = (Diagram) context.getTargetContainer();
// CONTAINER SHAPE WITH ROUNDED RECTANGLE
IPeCreateService peCreateService = Graphiti.getPeCreateService();
ContainerShape containerShape =
peCreateService.createContainerShape(targetDiagram, true);
// define a default size for the shape
int width = 100;
int height = 50;
IGaService gaService = Graphiti.getGaService();
{
// create and set graphics algorithm
RoundedRectangle roundedRectangle =
gaService.createRoundedRectangle(containerShape, 5, 5);
roundedRectangle.setForeground(manageColor(CLASS_FOREGROUND));
// set location
gaService.setLocationAndSize(roundedRectangle,
context.getX(), context.getY(), width, height);
// if added Class has no resource we add it to the resource
// of the diagram
// in a real scenario the business model would have its own resource
if (addedClass.eResource() == null) {
getDiagram().eResource().getContents().add(addedClass);
}
// create link and wire it
link(containerShape, addedClass);
}
return containerShape;
}
}
Added a getAddFeature() method to the class ProjectFeatureProvider like this:
package org.eclipse.graphiti.test.diagram;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.graphiti.dt.IDiagramTypeProvider;
import org.eclipse.graphiti.features.IAddFeature;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.test.features.ProjectAddEClassFeature;
import org.eclipse.graphiti.ui.features.DefaultFeatureProvider;
public class ProjectFeatureProvider extends DefaultFeatureProvider {
public ProjectFeatureProvider(IDiagramTypeProvider dtp) {
super(dtp);
}
@Override
public IAddFeature getAddFeature(IAddContext context) {
//is object for add request a EClass?
if (context.getNewObject() instanceof EClass) {
return new ProjectAddEClassFeature(this);
}
return super.getAddFeature(context);
}
}
Tryed to create a new graphiti diagram to test my newly created editor: Right click on the project folder > New > Other... > Graphiti Diagram) but unfortunately I can't choose my own diagram type because it is not listed in the selection (see Screenshot).
Have I done something in a wrong wrong?
By the way, I just want to create rectangles in my diagram with anchors on left and right side and connect them with EReferences.
I am grateful for any help!
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