84 lines
3.2 KiB
Java
84 lines
3.2 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.view;
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import android.graphics.RecordingCanvas;
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import android.graphics.Rect;
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/**
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* These callbacks are used to communicate window configuration changes while the user is performing
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* window changes.
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* Note: Note that at the time of onWindowDragResizeStart the content size isn't known. A consumer
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* should therfore not draw anything before the additional onContentDraw call has arrived.
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* @hide
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*/
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public interface WindowCallbacks {
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/**
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* Called by the system when the window got changed by the user, before the layouter got called.
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* It also gets called when the insets changed, or when the window switched between a fullscreen
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* layout or a non-fullscreen layout. It can be used to perform a "quick and dirty" resize which
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* should never take more then 4ms to complete.
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*
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* <p>At the time the layouting has not happened yet.
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*
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* @param newBounds The new window frame bounds.
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* @param fullscreen Whether the window is currently drawing in fullscreen.
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* @param systemInsets The current visible system insets for the window.
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* @param stableInsets The stable insets for the window.
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*/
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void onWindowSizeIsChanging(Rect newBounds, boolean fullscreen, Rect systemInsets,
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Rect stableInsets);
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/**
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* Called when a drag resize starts.
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*
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* @param initialBounds The initial bounds where the window will be.
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* @param fullscreen Whether the window is currently drawing in fullscreen.
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* @param systemInsets The current visible system insets for the window.
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* @param stableInsets The stable insets for the window.
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*/
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void onWindowDragResizeStart(Rect initialBounds, boolean fullscreen, Rect systemInsets,
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Rect stableInsets);
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/**
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* Called when a drag resize ends.
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*/
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void onWindowDragResizeEnd();
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/**
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* The content will now be drawn to these bounds. Returns true if
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* a draw should be requested after the next content draw.
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*/
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boolean onContentDrawn(int offsetX, int offsetY, int sizeX, int sizeY);
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/**
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* Called to request the window to draw one frame.
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* @param reportNextDraw Whether it should report when the requested draw finishes.
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*/
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void onRequestDraw(boolean reportNextDraw);
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/**
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* Called after all the content has drawn and the callback now has the ability to draw something
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* on top of everything. Call {@link ViewRootImpl#requestInvalidateRootRenderNode} when this
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* content needs to be redrawn.
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*
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* @param canvas The canvas to draw on.
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*/
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void onPostDraw(RecordingCanvas canvas);
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}
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