diff options
Diffstat (limited to 'eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/Overlay.java')
-rw-r--r-- | eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/Overlay.java | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/Overlay.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/Overlay.java new file mode 100644 index 000000000..9b7e0eb18 --- /dev/null +++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/Overlay.java @@ -0,0 +1,91 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Eclipse Public License, Version 1.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.eclipse.org/org/documents/epl-v10.php + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.ide.eclipse.adt.internal.editors.layout.gle2; + +import org.eclipse.swt.graphics.Device; +import org.eclipse.swt.graphics.GC; + +/** + * An Overlay is a set of graphics which can be painted on top of the visual + * editor. Different {@link Gesture}s produce context specific overlays, such as + * swiping rectangles from the {@link MarqueeGesture} and guidelines from the + * {@link MoveGesture}. + */ +public abstract class Overlay { + private Device mDevice; + + /** Whether the hover is hidden */ + private boolean mHiding; + + /** + * Construct the overlay, using the given graphics context for painting. + */ + public Overlay() { + super(); + } + + /** + * Initializes the overlay before the first use, if applicable. This is a + * good place to initialize resources like colors. + * + * @param device The device to allocate resources for; the parameter passed + * to {@link #paint} will correspond to this device. + */ + public void create(Device device) { + mDevice = device; + } + + /** + * Releases resources held by the overlay. Called by the editor when an + * overlay has been removed. + */ + public void dispose() { + } + + /** + * Paints the overlay. + * + * @param gc The SWT {@link GC} object to draw into. + */ + public void paint(GC gc) { + throw new IllegalArgumentException("paint() not implemented, probably done " + + "with specialized paint signature"); + } + + /** Returns the device associated with this overlay */ + public Device getDevice() { + return mDevice; + } + + /** + * Returns whether the overlay is hidden + * + * @return true if the selection overlay is hidden + */ + public boolean isHiding() { + return mHiding; + } + + /** + * Hides the overlay + * + * @param hiding true to hide the overlay, false to unhide it (default) + */ + public void setHiding(boolean hiding) { + mHiding = hiding; + } +} |