1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.view; 18 19 import android.graphics.Rect; 20 21 /** 22 * These callbacks are used to communicate window configuration changes while the user is performing 23 * window changes. 24 * Note: Note that at the time of onWindowDragResizeStart the content size isn't known. A consumer 25 * should therfore not draw anything before the additional onContentDraw call has arrived. 26 * @hide 27 */ 28 public interface WindowCallbacks { 29 30 public static final int RESIZE_MODE_INVALID = -1; 31 public static final int RESIZE_MODE_FREEFORM = 0; 32 public static final int RESIZE_MODE_DOCKED_DIVIDER = 1; 33 34 /** 35 * Called by the system when the window got changed by the user, before the layouter got called. 36 * It also gets called when the insets changed, or when the window switched between a fullscreen 37 * layout or a non-fullscreen layout. It can be used to perform a "quick and dirty" resize which 38 * should never take more then 4ms to complete. 39 * 40 * <p>At the time the layouting has not happened yet. 41 * 42 * @param newBounds The new window frame bounds. 43 * @param fullscreen Whether the window is currently drawing in fullscreen. 44 * @param systemInsets The current visible system insets for the window. 45 * @param stableInsets The stable insets for the window. 46 */ 47 void onWindowSizeIsChanging(Rect newBounds, boolean fullscreen, Rect systemInsets, 48 Rect stableInsets); 49 50 /** 51 * Called when a drag resize starts. 52 * 53 * @param initialBounds The initial bounds where the window will be. 54 * @param fullscreen Whether the window is currently drawing in fullscreen. 55 * @param systemInsets The current visible system insets for the window. 56 * @param stableInsets The stable insets for the window. 57 */ 58 void onWindowDragResizeStart(Rect initialBounds, boolean fullscreen, Rect systemInsets, 59 Rect stableInsets, int resizeMode); 60 61 /** 62 * Called when a drag resize ends. 63 */ 64 void onWindowDragResizeEnd(); 65 66 /** 67 * The content will now be drawn to these bounds. Returns true if 68 * a draw should be requested after the next content draw. 69 */ 70 boolean onContentDrawn(int offsetX, int offsetY, int sizeX, int sizeY); 71 72 /** 73 * Called to request the window to draw one frame. 74 * @param reportNextDraw Whether it should report when the requested draw finishes. 75 */ 76 void onRequestDraw(boolean reportNextDraw); 77 78 /** 79 * Called after all the content has drawn and the callback now has the ability to draw something 80 * on top of everything. Call {@link ViewRootImpl#requestInvalidateRootRenderNode} when this 81 * content needs to be redrawn. 82 * 83 * @param canvas The canvas to draw on. 84 */ 85 void onPostDraw(DisplayListCanvas canvas); 86 } 87
