diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/state/DragListener.java')
-rw-r--r-- | src/com/android/gallery3d/filtershow/state/DragListener.java | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/state/DragListener.java b/src/com/android/gallery3d/filtershow/state/DragListener.java new file mode 100644 index 000000000..1aa81ed69 --- /dev/null +++ b/src/com/android/gallery3d/filtershow/state/DragListener.java @@ -0,0 +1,110 @@ +/* + * Copyright (C) 2013 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.gallery3d.filtershow.state; + +import android.view.DragEvent; +import android.view.View; +import android.widget.ArrayAdapter; +import android.widget.LinearLayout; + +class DragListener implements View.OnDragListener { + + private static final String LOGTAG = "DragListener"; + private PanelTrack mStatePanelTrack; + private static float sSlope = 0.2f; + + public DragListener(PanelTrack statePanelTrack) { + mStatePanelTrack = statePanelTrack; + } + + private void setState(DragEvent event) { + float translation = event.getY() - mStatePanelTrack.getTouchPoint().y; + float alpha = 1.0f - (Math.abs(translation) + / mStatePanelTrack.getCurrentView().getHeight()); + if (mStatePanelTrack.getOrientation() == LinearLayout.VERTICAL) { + translation = event.getX() - mStatePanelTrack.getTouchPoint().x; + alpha = 1.0f - (Math.abs(translation) + / mStatePanelTrack.getCurrentView().getWidth()); + mStatePanelTrack.getCurrentView().setTranslationX(translation); + } else { + mStatePanelTrack.getCurrentView().setTranslationY(translation); + } + mStatePanelTrack.getCurrentView().setBackgroundAlpha(alpha); + } + + @Override + public boolean onDrag(View v, DragEvent event) { + switch (event.getAction()) { + case DragEvent.ACTION_DRAG_STARTED: { + break; + } + case DragEvent.ACTION_DRAG_LOCATION: { + if (mStatePanelTrack.getCurrentView() != null) { + setState(event); + View over = mStatePanelTrack.findChildAt((int) event.getX(), + (int) event.getY()); + if (over != null && over != mStatePanelTrack.getCurrentView()) { + StateView stateView = (StateView) over; + if (stateView != mStatePanelTrack.getCurrentView()) { + int pos = mStatePanelTrack.findChild(over); + int origin = mStatePanelTrack.findChild( + mStatePanelTrack.getCurrentView()); + ArrayAdapter array = (ArrayAdapter) mStatePanelTrack.getAdapter(); + if (origin != -1 && pos != -1) { + State current = (State) array.getItem(origin); + array.remove(current); + array.insert(current, pos); + mStatePanelTrack.fillContent(false); + mStatePanelTrack.setCurrentView(mStatePanelTrack.getChildAt(pos)); + } + } + } + } + break; + } + case DragEvent.ACTION_DRAG_ENTERED: { + mStatePanelTrack.setExited(false); + if (mStatePanelTrack.getCurrentView() != null) { + mStatePanelTrack.getCurrentView().setVisibility(View.VISIBLE); + } + return true; + } + case DragEvent.ACTION_DRAG_EXITED: { + if (mStatePanelTrack.getCurrentView() != null) { + setState(event); + mStatePanelTrack.getCurrentView().setVisibility(View.INVISIBLE); + } + mStatePanelTrack.setExited(true); + break; + } + case DragEvent.ACTION_DROP: { + break; + } + case DragEvent.ACTION_DRAG_ENDED: { + if (mStatePanelTrack.getCurrentView() != null + && mStatePanelTrack.getCurrentView().getAlpha() > sSlope) { + setState(event); + } + mStatePanelTrack.checkEndState(); + break; + } + default: + break; + } + return true; + } +} |