/*******************************************************************************
* Copyright (c) 2015, 2016 Obeo.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.eef.ide.ui.internal.widgets;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.eef.EEFLabelDescription;
import org.eclipse.eef.EEFLabelStyle;
import org.eclipse.eef.EEFWidgetAction;
import org.eclipse.eef.EEFWidgetDescription;
import org.eclipse.eef.EEFWidgetStyle;
import org.eclipse.eef.common.ui.api.EEFWidgetFactory;
import org.eclipse.eef.common.ui.api.IEEFFormContainer;
import org.eclipse.eef.common.ui.api.SWTUtils;
import org.eclipse.eef.core.api.EditingContextAdapter;
import org.eclipse.eef.core.api.controllers.EEFControllersFactory;
import org.eclipse.eef.core.api.controllers.IEEFLabelController;
import org.eclipse.eef.core.api.controllers.IEEFWidgetController;
import org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager;
import org.eclipse.eef.ide.ui.api.widgets.EEFStyleHelper;
import org.eclipse.eef.ide.ui.api.widgets.EEFStyleHelper.IEEFTextStyleCallback;
import org.eclipse.eef.ide.ui.internal.EEFIdeUiPlugin;
import org.eclipse.sirius.common.interpreter.api.IInterpreter;
import org.eclipse.sirius.common.interpreter.api.IVariableManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
/**
* This class will be used in order to manage the lifecycle of a label.
*
* @author mbats
*/
public class EEFLabelLifecycleManager extends AbstractEEFWidgetLifecycleManager {
/**
* This constant is used in order to tell SWT that the label should be 300px wide even if it is not useful. The
* layout data should work by themselves but it seems that there is a bug with SWT so, this useless information on
* the width of the label make it work. Don't ask me why :)
*/
private static final int LABEL_WIDTH_HINT = 300;
/**
* The description.
*/
private EEFLabelDescription description;
/**
* The body.
*/
private StyledText body;
/**
* The action buttons.
*/
private List<ActionButton> actionButtons = new ArrayList<ActionButton>();
/**
* The controller.
*/
private IEEFLabelController controller;
/**
* The widget factory.
*/
private EEFWidgetFactory widgetFactory;
/**
* The constructor.
*
* @param description
* The description
* @param variableManager
* The variable manager
* @param interpreter
* The interpreter
* @param editingContextAdapter
* The editing context adapter
*/
public EEFLabelLifecycleManager(EEFLabelDescription description, IVariableManager variableManager, IInterpreter interpreter,
EditingContextAdapter editingContextAdapter) {
super(variableManager, interpreter, editingContextAdapter);
this.description = description;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#createMainControl(org.eclipse.swt.widgets.Composite,
* org.eclipse.eef.common.ui.api.IEEFFormContainer)
*/
@Override
protected void createMainControl(Composite parent, IEEFFormContainer formContainer) {
this.widgetFactory = formContainer.getWidgetFactory();
// this is the parent composite
Composite labelComposite = this.widgetFactory.createFlatFormComposite(parent);
GridLayout layout = new GridLayout(2, false);
// Remove the 5px left margin only
layout.marginWidth = 0;
layout.marginRight = 5;
labelComposite.setLayout(layout);
GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);
labelComposite.setLayoutData(gridData);
this.createLabel(labelComposite);
this.createWidgetActionButtons(labelComposite);
this.controller = new EEFControllersFactory().createLabelController(this.description, this.variableManager, this.interpreter,
this.editingContextAdapter);
}
/**
* Create the label widget.
*
* @param parent
* The parent composite
*/
private void createLabel(Composite parent) {
this.body = this.widgetFactory.createStyledText(parent, SWT.WRAP);
GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);
// TODO Add a linecount property to the label and use it to compute the height of the widget
gridData.heightHint = this.body.getLineHeight();
gridData.widthHint = LABEL_WIDTH_HINT;
gridData.horizontalIndent = VALIDATION_MARKER_OFFSET;
this.body.setLayoutData(gridData);
this.body.setEditable(false);
}
/**
* Create widget action buttons.
*
* @param parent
* The parent composite
*/
private void createWidgetActionButtons(Composite parent) {
Composite buttons = this.widgetFactory.createFlatFormComposite(parent);
GridData gridData = new GridData();
gridData.grabExcessHorizontalSpace = false;
buttons.setLayoutData(gridData);
buttons.setLayout(new GridLayout(this.description.getActions().size(), true));
// Buttons are visible only if an action is defined
for (EEFWidgetAction action : this.description.getActions()) {
ActionButton actionButton = new ActionButton(action, buttons, this.widgetFactory, this.interpreter, this.variableManager);
actionButtons.add(actionButton);
}
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#getLabelVerticalAlignment()
*/
@Override
protected int getLabelVerticalAlignment() {
return GridData.VERTICAL_ALIGN_CENTER;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.IEEFLifecycleManager#aboutToBeShown()
*/
@Override
public void aboutToBeShown() {
super.aboutToBeShown();
this.controller.onNewValue((value) -> {
if (!body.isDisposed()) {
if (!(body.getText() != null && body.getText().equals(value))) {
body.setText(Optional.ofNullable(value).orElse("")); //$NON-NLS-1$
}
this.setStyle();
}
});
this.actionButtons.forEach(actionButton -> {
SelectionListener selectionListener = SWTUtils.widgetSelectedAdapter((event) -> {
if (!this.container.isRenderingInProgress()) {
IStatus result = controller.action(actionButton.getAction());
if (result != null && result.getSeverity() == IStatus.ERROR) {
EEFIdeUiPlugin.INSTANCE.log(result);
} else {
refresh();
}
}
});
actionButton.addSelectionListener(selectionListener);
});
}
/**
* Set the style.
*/
private void setStyle() {
EEFStyleHelper styleHelper = new EEFStyleHelper(this.interpreter, this.variableManager);
EEFWidgetStyle style = styleHelper.getWidgetStyle(this.description);
if (style instanceof EEFLabelStyle) {
EEFLabelStyle labelStyle = (EEFLabelStyle) style;
IEEFTextStyleCallback callback = new EEFStyledTextStyleCallback(this.body);
styleHelper.applyTextStyle(labelStyle.getFontNameExpression(), labelStyle.getFontSizeExpression(), labelStyle.getFontStyleExpression(),
this.body.getFont(), labelStyle.getBackgroundColorExpression(), labelStyle.getForegroundColorExpression(), callback);
}
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#setEnabled(boolean)
*/
@Override
protected void setEnabled(boolean isEnabled) {
if (!this.body.isDisposed()) {
this.body.setEnabled(isEnabled);
}
this.actionButtons.stream().filter(actionButton -> !actionButton.getButton().isDisposed())
.forEach(actionButton -> actionButton.setEnabled(isEnabled));
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.IEEFLifecycleManager#aboutToBeHidden()
*/
@Override
public void aboutToBeHidden() {
super.aboutToBeHidden();
this.actionButtons.forEach(ActionButton::removeSelectionListener);
this.controller.removeNewValueConsumer();
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.IEEFLifecycleManager#dispose()
*/
@Override
protected IEEFWidgetController getController() {
return this.controller;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#getController()
*/
@Override
protected EEFWidgetDescription getWidgetDescription() {
return this.description;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#getValidationControl()
*/
@Override
protected Control getValidationControl() {
return this.body;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.eef.ide.ui.api.widgets.AbstractEEFWidgetLifecycleManager#dispose()
*/
@Override
public void dispose() {
super.dispose();
this.actionButtons.clear();
}
}