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Package: SimpleControlSWTControlSWTRenderer$1
SimpleControlSWTControlSWTRenderer$1
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1: /*******************************************************************************
2: * Copyright (c) 2011-2013 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Edagr Mueller - initial API and implementation
13: * Eugen Neufeld - Refactoring
14: ******************************************************************************/
15: package org.eclipse.emf.ecp.view.spi.core.swt;
16:
17: import org.eclipse.core.databinding.Binding;
18: import org.eclipse.core.databinding.UpdateValueStrategy;
19: import org.eclipse.core.databinding.property.value.IValueProperty;
20: import org.eclipse.emf.ecore.EStructuralFeature;
21: import org.eclipse.emf.ecp.edit.spi.swt.util.PreSetValidationStrategy;
22: import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
23: import org.eclipse.emf.ecp.view.spi.model.VControl;
24: import org.eclipse.emf.ecp.view.template.model.VTViewTemplateProvider;
25: import org.eclipse.emfforms.spi.common.report.ReportService;
26: import org.eclipse.emfforms.spi.common.validation.PreSetValidationService;
27: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
28: import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding;
29: import org.eclipse.emfforms.spi.core.services.label.EMFFormsLabelProvider;
30: import org.eclipse.swt.events.DisposeEvent;
31: import org.eclipse.swt.events.DisposeListener;
32: import org.eclipse.swt.widgets.Composite;
33: import org.eclipse.swt.widgets.Control;
34:
35: /**
36: * Renderer for {@link org.eclipse.swt.widgets.Control Controls}.
37: *
38: * @author Eugen Neufeld
39: *
40: */
41: public abstract class SimpleControlSWTControlSWTRenderer extends SimpleControlSWTRenderer {
42:
43: private Binding[] bindings;
44: private Control control;
45:
46: /**
47: * Default constructor.
48: *
49: * @param vElement the view model element to be rendered
50: * @param viewContext the view context
51: * @param reportService The {@link ReportService}
52: * @param emfFormsDatabinding The {@link EMFFormsDatabinding}
53: * @param emfFormsLabelProvider The {@link EMFFormsLabelProvider}
54: * @param vtViewTemplateProvider The {@link VTViewTemplateProvider}
55: * @since 1.6
56: */
57: public SimpleControlSWTControlSWTRenderer(VControl vElement, ViewModelContext viewContext,
58: ReportService reportService,
59: EMFFormsDatabinding emfFormsDatabinding, EMFFormsLabelProvider emfFormsLabelProvider,
60: VTViewTemplateProvider vtViewTemplateProvider) {
61: super(vElement, viewContext, reportService, emfFormsDatabinding, emfFormsLabelProvider, vtViewTemplateProvider);
62: }
63:
64: /**
65: * Creates the control itself.
66: *
67: * @param parent the {@link Composite} to render onto
68: * @return the rendered control
69: * @throws DatabindingFailedException if the databinding of the control fails
70: */
71: @Override
72: protected final Control createControl(Composite parent) throws DatabindingFailedException {
73: control = createSWTControl(parent);
74: if (control == null) {
75: return null;
76: }
77: bindings = createBindings(control);
78:
79: control.addDisposeListener(new DisposeListener() {
80: @Override
81: public void widgetDisposed(DisposeEvent e) {
82: disposeBindings();
83:
84: }
85: });
86:
87: return control;
88: }
89:
90: /**
91: * {@inheritDoc}
92: *
93: * @see org.eclipse.emf.ecp.view.spi.core.swt.AbstractControlSWTRenderer#rootDomainModelChanged()
94: */
95: @Override
96: protected void rootDomainModelChanged() throws DatabindingFailedException {
97: disposeBindings();
98: bindings = createBindings(control);
99: super.rootDomainModelChanged();
100: }
101:
102: /**
103: * Disposes all bindings of this renderer.
104: */
105: private void disposeBindings() {
106: if (bindings != null) {
107: for (final Binding binding : bindings) {
108: binding.dispose();
109: }
110: }
111: }
112:
113: /**
114: * Create a {@link PreSetValidationStrategy}.
115: *
116: * @param delegate a delegate {@link UpdateValueStrategy}
117: *
118: * @return a {@link PreSetValidationStrategy}
119: * @throws DatabindingFailedException in case the necessary feature can not be obtained
120: *
121: * @since 1.13
122: */
123: protected UpdateValueStrategy withPreSetValidation(UpdateValueStrategy delegate)
124: throws DatabindingFailedException {
125: if (getViewModelContext().hasService(PreSetValidationService.class)) {
126: return new PreSetValidationStrategy(getVElement(), getFeature(), delegate);
127: }
128: return delegate;
129: }
130:
131: /**
132: * Retrieves the associated {@link EStructuralFeature} of this renderer.
133: *
134: * @return the feature
135: * @throws DatabindingFailedException in case the necessary feature can not be obtained
136: *
137: * @since 1.13
138: */
139: protected EStructuralFeature getFeature() throws DatabindingFailedException {
140: final EMFFormsDatabinding databindingService = getEMFFormsDatabinding();
141: final IValueProperty valueProperty = databindingService.getValueProperty(
142: getVElement().getDomainModelReference(),
143: getViewModelContext().getDomainModel());
144: return EStructuralFeature.class.cast(valueProperty.getValueType());
145: }
146:
147: /**
148: * Create the {@link Binding Bindings} for this controls.
149: *
150: * @param control the {@link Control} to create the binding for
151: * @return all the bindings created by this renderer
152: * @throws DatabindingFailedException if the creation of the bindings fails.
153: * @since 1.6
154: */
155: protected abstract Binding[] createBindings(Control control) throws DatabindingFailedException;
156:
157: /**
158: * Creates the Control.
159: *
160: * @param parent the {@link Composite} to use as a parent
161: * @return the created control
162: * @throws DatabindingFailedException if the creation of the control fails due to databinding problems
163: * @since 1.6
164: */
165: protected abstract Control createSWTControl(Composite parent) throws DatabindingFailedException;
166:
167: }