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* Copyright (C) 2014 Canonical, Ltd.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 3.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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\brief A filter for volume keys
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A filter which treats volume keys as single tri-state key with the states:
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VolumeUp Pressed, VolumeDown Pressed or Volume Up+Down pressed
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signal volumeUpPressed()
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signal volumeDownPressed()
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signal bothVolumeKeysPressed()
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property bool volumeUpKeyPressed: false
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property bool volumeDownKeyPressed: false
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property bool aVolumeKeyWasReleased: true
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function onKeyPressed(key) {
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if (key == Qt.Key_VolumeUp)
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volumeUpKeyPressed = true;
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else if (key == Qt.Key_VolumeDown)
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volumeDownKeyPressed = true;
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if (volumeDownKeyPressed && volumeUpKeyPressed) {
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//avoids sending a signal repeatedly if both keys are held
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//instead one of the keys must have been previously released
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if (aVolumeKeyWasReleased)
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bothVolumeKeysPressed();
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aVolumeKeyWasReleased = false;
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} else if (volumeDownKeyPressed) {
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} else if (volumeUpKeyPressed) {
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function onKeyReleased(key) {
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if (key == Qt.Key_VolumeUp) {
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volumeUpKeyPressed = false;
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aVolumeKeyWasReleased = true;
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} else if (key == Qt.Key_VolumeDown) {
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volumeDownKeyPressed = false;
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aVolumeKeyWasReleased = true;
added
removed
qml/Components/VolumeKeyFilter.qml
