/* * Copyright (C) 2015 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.view; import android.graphics.RecordingCanvas; import android.graphics.Rect; /** * These callbacks are used to communicate window configuration changes while the user is performing * window changes. * Note: Note that at the time of onWindowDragResizeStart the content size isn't known. A consumer * should therfore not draw anything before the additional onContentDraw call has arrived. * @hide */ public interface WindowCallbacks { public static final int RESIZE_MODE_INVALID = -1; public static final int RESIZE_MODE_FREEFORM = 0; public static final int RESIZE_MODE_DOCKED_DIVIDER = 1; /** * Called by the system when the window got changed by the user, before the layouter got called. * It also gets called when the insets changed, or when the window switched between a fullscreen * layout or a non-fullscreen layout. It can be used to perform a "quick and dirty" resize which * should never take more then 4ms to complete. * *

At the time the layouting has not happened yet. * * @param newBounds The new window frame bounds. * @param fullscreen Whether the window is currently drawing in fullscreen. * @param systemInsets The current visible system insets for the window. * @param stableInsets The stable insets for the window. */ void onWindowSizeIsChanging(Rect newBounds, boolean fullscreen, Rect systemInsets, Rect stableInsets); /** * Called when a drag resize starts. * * @param initialBounds The initial bounds where the window will be. * @param fullscreen Whether the window is currently drawing in fullscreen. * @param systemInsets The current visible system insets for the window. * @param stableInsets The stable insets for the window. */ void onWindowDragResizeStart(Rect initialBounds, boolean fullscreen, Rect systemInsets, Rect stableInsets, int resizeMode); /** * Called when a drag resize ends. */ void onWindowDragResizeEnd(); /** * The content will now be drawn to these bounds. Returns true if * a draw should be requested after the next content draw. */ boolean onContentDrawn(int offsetX, int offsetY, int sizeX, int sizeY); /** * Called to request the window to draw one frame. * @param reportNextDraw Whether it should report when the requested draw finishes. */ void onRequestDraw(boolean reportNextDraw); /** * Called after all the content has drawn and the callback now has the ability to draw something * on top of everything. Call {@link ViewRootImpl#requestInvalidateRootRenderNode} when this * content needs to be redrawn. * * @param canvas The canvas to draw on. */ void onPostDraw(RecordingCanvas canvas); }