content: /*
   * 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.
       *
       * <p>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);
  }
  