| /********************************************************************* |
| * Copyright (c) 2005, 2019 SAP SE |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * Contributors: |
| * SAP SE - initial API, implementation and documentation |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| **********************************************************************/ |
| package org.eclipse.graphiti.ui.internal.contextbuttons; |
| |
| /** |
| * This transparency provider interface can be implemented to provide the |
| * 'current transparency'. The 'current transparency' value is multiplied with |
| * any other transparency/opacity values of a figure before painting. It is |
| * basically a central adjustment of the transparency value(s) of a figure. |
| * <p> |
| * The idea is, that a transparency provider could increase/decrease the current |
| * transparency in a loop, which would result in a fade in/out effect of the |
| * figure. |
| * |
| * @noimplement This interface is not intended to be implemented by clients. |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| interface ITransparencyProvider { |
| |
| // TODO: enhance this interface |
| // If this should become a globally used interface, then we need a set-method instead of a get-method, because otherwise the |
| // figures do not know when the current transparency changes. |
| |
| /** |
| * Returns the current transparency as described above. |
| * |
| * @return The current transparency as described above. |
| */ |
| double getCurrentTransparency(); |
| } |
