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Diffstat (limited to 'src/com/android/launcher3/DropTargetBar.java')
-rw-r--r-- | src/com/android/launcher3/DropTargetBar.java | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java new file mode 100644 index 000000000..5966af51c --- /dev/null +++ b/src/com/android/launcher3/DropTargetBar.java @@ -0,0 +1,153 @@ +/* + * 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 com.android.launcher3; + +import android.animation.TimeInterpolator; +import android.content.Context; +import android.util.AttributeSet; +import android.view.View; +import android.view.ViewDebug; +import android.view.ViewPropertyAnimator; +import android.view.accessibility.AccessibilityManager; +import android.view.animation.AccelerateInterpolator; +import android.widget.LinearLayout; + +import com.android.launcher3.dragndrop.DragController; + +/* + * The top bar containing various drop targets: Delete/App Info/Uninstall. + */ +public class DropTargetBar extends LinearLayout implements DragController.DragListener { + + protected static final int DEFAULT_DRAG_FADE_DURATION = 175; + protected static final TimeInterpolator DEFAULT_INTERPOLATOR = new AccelerateInterpolator(); + + private final Runnable mFadeAnimationEndRunnable = new Runnable() { + + @Override + public void run() { + AccessibilityManager am = (AccessibilityManager) + getContext().getSystemService(Context.ACCESSIBILITY_SERVICE); + boolean accessibilityEnabled = am.isEnabled(); + AlphaUpdateListener.updateVisibility(DropTargetBar.this, accessibilityEnabled); + } + }; + + @ViewDebug.ExportedProperty(category = "launcher") + protected boolean mDeferOnDragEnd; + + @ViewDebug.ExportedProperty(category = "launcher") + protected boolean mVisible = false; + + private ViewPropertyAnimator mCurrentAnimation; + + // Drop targets + private ButtonDropTarget mDeleteDropTarget; + private ButtonDropTarget mAppInfoDropTarget; + private ButtonDropTarget mUninstallDropTarget; + + public DropTargetBar(Context context, AttributeSet attrs) { + super(context, attrs); + } + + public DropTargetBar(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + } + + @Override + protected void onFinishInflate() { + super.onFinishInflate(); + + // Get the individual components + mDeleteDropTarget = (ButtonDropTarget) findViewById(R.id.delete_target_text); + mAppInfoDropTarget = (ButtonDropTarget) findViewById(R.id.info_target_text); + mUninstallDropTarget = (ButtonDropTarget) findViewById(R.id.uninstall_target_text); + + mDeleteDropTarget.setDropTargetBar(this); + mAppInfoDropTarget.setDropTargetBar(this); + mUninstallDropTarget.setDropTargetBar(this); + + // Initialize with hidden state + setAlpha(0f); + } + + public void setup(DragController dragController) { + dragController.addDragListener(this); + dragController.setFlingToDeleteDropTarget(mDeleteDropTarget); + + dragController.addDragListener(mDeleteDropTarget); + dragController.addDragListener(mAppInfoDropTarget); + dragController.addDragListener(mUninstallDropTarget); + + dragController.addDropTarget(mDeleteDropTarget); + dragController.addDropTarget(mAppInfoDropTarget); + dragController.addDropTarget(mUninstallDropTarget); + } + + private void animateToVisibility(boolean isVisible) { + if (mVisible != isVisible) { + mVisible = isVisible; + + // Cancel any existing animation + if (mCurrentAnimation != null) { + mCurrentAnimation.cancel(); + mCurrentAnimation = null; + } + + float finalAlpha = mVisible ? 1 : 0; + if (Float.compare(getAlpha(), finalAlpha) != 0) { + setVisibility(View.VISIBLE); + mCurrentAnimation = animate().alpha(finalAlpha) + .setInterpolator(DEFAULT_INTERPOLATOR) + .setDuration(DEFAULT_DRAG_FADE_DURATION) + .withEndAction(mFadeAnimationEndRunnable); + } + + } + } + + public void enableAccessibleDrag(boolean enable) { + mDeleteDropTarget.enableAccessibleDrag(enable); + mAppInfoDropTarget.enableAccessibleDrag(enable); + mUninstallDropTarget.enableAccessibleDrag(enable); + } + + /* + * DragController.DragListener implementation + */ + @Override + public void onDragStart(DragSource source, ItemInfo info, int dragAction) { + animateToVisibility(true); + } + + /** + * This is called to defer hiding the delete drop target until the drop animation has completed, + * instead of hiding immediately when the drag has ended. + */ + protected void deferOnDragEnd() { + mDeferOnDragEnd = true; + } + + @Override + public void onDragEnd() { + if (!mDeferOnDragEnd) { + animateToVisibility(false); + } else { + mDeferOnDragEnd = false; + } + } +} |