diff options
Diffstat (limited to 'src/android/support/v4/view/ViewConfigurationCompat.java')
-rw-r--r-- | src/android/support/v4/view/ViewConfigurationCompat.java | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/android/support/v4/view/ViewConfigurationCompat.java b/src/android/support/v4/view/ViewConfigurationCompat.java new file mode 100644 index 0000000..fd26a27 --- /dev/null +++ b/src/android/support/v4/view/ViewConfigurationCompat.java @@ -0,0 +1,75 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 + * + * 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 android.support.v4.view; + +import android.view.ViewConfiguration; + +/** + * Helper for accessing features in {@link ViewConfiguration} + * introduced after API level 4 in a backwards compatible fashion. + */ +public class ViewConfigurationCompat { + /** + * Interface for the full API. + */ + interface ViewConfigurationVersionImpl { + public int getScaledPagingTouchSlop(ViewConfiguration config); + } + + /** + * Interface implementation that doesn't use anything about v4 APIs. + */ + static class BaseViewConfigurationVersionImpl implements ViewConfigurationVersionImpl { + @Override + public int getScaledPagingTouchSlop(ViewConfiguration config) { + return config.getScaledTouchSlop(); + } + } + + /** + * Interface implementation for devices with at least v11 APIs. + */ + static class FroyoViewConfigurationVersionImpl implements ViewConfigurationVersionImpl { + @Override + public int getScaledPagingTouchSlop(ViewConfiguration config) { + return ViewConfigurationCompatFroyo.getScaledPagingTouchSlop(config); + } + } + + /** + * Select the correct implementation to use for the current platform. + */ + static final ViewConfigurationVersionImpl IMPL; + static { + if (android.os.Build.VERSION.SDK_INT >= 11) { + IMPL = new FroyoViewConfigurationVersionImpl(); + } else { + IMPL = new BaseViewConfigurationVersionImpl(); + } + } + + // ------------------------------------------------------------------- + + /** + * Call {@link ViewConfiguration#getScaledPagingTouchSlop()}. + * If running on a pre-{@link android.os.Build.VERSION_CODES#FROYO} device, + * returns {@link ViewConfiguration#getScaledTouchSlop()}. + */ + public static int getScaledPagingTouchSlop(ViewConfiguration config) { + return IMPL.getScaledPagingTouchSlop(config); + } +} |