e89d1041dd
Ensure that the joystick can always reach -1.0, 0.0 and 1.0 positions even when noise filtering is applied. (Bug: 3514510) Add support for a few more standard axes. Add additional mapping modes for axes. Some axes are inverted from standard interpretation or are actually intended to be split into two distict axes such as left/right trigger controls or accelerator/brake. Add key layout file for a G25 racing wheel and XBox 360 controller to tweak behavior. They work fine without them but the axis mappings are not ideal. Change-Id: I0fddd90309af4dc14d35f34fe99ed6e521c0b7c7
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/*
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* Copyright (C) 2008 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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#ifndef _UI_KEY_LAYOUT_MAP_H
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#define _UI_KEY_LAYOUT_MAP_H
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#include <stdint.h>
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#include <utils/Errors.h>
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#include <utils/KeyedVector.h>
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#include <utils/Tokenizer.h>
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namespace android {
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struct AxisInfo {
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enum Mode {
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// Axis value is reported directly.
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MODE_NORMAL = 0,
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// Axis value should be inverted before reporting.
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MODE_INVERT = 1,
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// Axis value should be split into two axes
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MODE_SPLIT = 2,
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};
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// Axis mode.
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Mode mode;
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// Axis id.
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// When split, this is the axis used for values smaller than the split position.
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int32_t axis;
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// When split, this is the axis used for values after higher than the split position.
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int32_t highAxis;
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// The split value, or 0 if not split.
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int32_t splitValue;
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// The flat value, or -1 if none.
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int32_t flatOverride;
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AxisInfo() : mode(MODE_NORMAL), axis(-1), highAxis(-1), splitValue(0), flatOverride(-1) {
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}
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};
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/**
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* Describes a mapping from keyboard scan codes and joystick axes to Android key codes and axes.
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*/
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class KeyLayoutMap {
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public:
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~KeyLayoutMap();
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static status_t load(const String8& filename, KeyLayoutMap** outMap);
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status_t mapKey(int32_t scanCode, int32_t* keyCode, uint32_t* flags) const;
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status_t findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const;
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status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
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private:
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struct Key {
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int32_t keyCode;
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uint32_t flags;
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};
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KeyedVector<int32_t, Key> mKeys;
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KeyedVector<int32_t, AxisInfo> mAxes;
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KeyLayoutMap();
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class Parser {
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KeyLayoutMap* mMap;
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Tokenizer* mTokenizer;
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public:
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Parser(KeyLayoutMap* map, Tokenizer* tokenizer);
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~Parser();
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status_t parse();
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private:
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status_t parseKey();
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status_t parseAxis();
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};
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};
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} // namespace android
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#endif // _UI_KEY_LAYOUT_MAP_H
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