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/*
* Copyright (C) 2017 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.states;
import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_TRANSITION_MS;
import static com.android.launcher3.states.RotationHelper.REQUEST_LOCK;
import android.graphics.Rect;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.InstallShortcutReceiver;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.Workspace;
import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
/**
* Definition for spring loaded state used during drag and drop.
*/
public class SpringLoadedState extends LauncherState {
private static final int STATE_FLAGS = FLAG_MULTI_PAGE |
FLAG_DISABLE_ACCESSIBILITY | FLAG_DISABLE_RESTORE | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED |
FLAG_DISABLE_PAGE_CLIPPING | FLAG_PAGE_BACKGROUNDS | FLAG_HIDE_BACK_BUTTON;
public SpringLoadedState(int id) {
super(id, ContainerType.OVERVIEW, SPRING_LOADED_TRANSITION_MS, STATE_FLAGS);
}
@Override
public float[] getWorkspaceScaleAndTranslation(Launcher launcher) {
DeviceProfile grid = launcher.getDeviceProfile();
Workspace ws = launcher.getWorkspace();
if (ws.getChildCount() == 0) {
return super.getWorkspaceScaleAndTranslation(launcher);
}
if (grid.isVerticalBarLayout()) {
float scale = grid.workspaceSpringLoadShrinkFactor;
return new float[] {scale, 0, 0};
}
float scale = grid.workspaceSpringLoadShrinkFactor;
Rect insets = launcher.getDragLayer().getInsets();
float scaledHeight = scale * ws.getNormalChildHeight();
float shrunkTop = insets.top + grid.dropTargetBarSizePx;
float shrunkBottom = ws.getMeasuredHeight() - insets.bottom
- grid.workspacePadding.bottom
- grid.workspaceSpringLoadedBottomSpace;
float totalShrunkSpace = shrunkBottom - shrunkTop;
float desiredCellTop = shrunkTop + (totalShrunkSpace - scaledHeight) / 2;
float halfHeight = ws.getHeight() / 2;
float myCenter = ws.getTop() + halfHeight;
float cellTopFromCenter = halfHeight - ws.getChildAt(0).getTop();
float actualCellTop = myCenter - cellTopFromCenter * scale;
return new float[] { scale, 0, (desiredCellTop - actualCellTop) / scale};
}
@Override
public void onStateEnabled(Launcher launcher) {
Workspace ws = launcher.getWorkspace();
ws.showPageIndicatorAtCurrentScroll();
ws.getPageIndicator().setShouldAutoHide(false);
// Prevent any Un/InstallShortcutReceivers from updating the db while we are
// in spring loaded mode
InstallShortcutReceiver.enableInstallQueue(InstallShortcutReceiver.FLAG_DRAG_AND_DROP);
launcher.getRotationHelper().setCurrentStateRequest(REQUEST_LOCK);
}
@Override
public float getWorkspaceScrimAlpha(Launcher launcher) {
return 0.3f;
}
@Override
public void onStateDisabled(final Launcher launcher) {
launcher.getWorkspace().getPageIndicator().setShouldAutoHide(true);
// Re-enable any Un/InstallShortcutReceiver and now process any queued items
InstallShortcutReceiver.disableAndFlushInstallQueue(
InstallShortcutReceiver.FLAG_DRAG_AND_DROP, launcher);
}
}
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