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add haptic feedback to task switcher gestures

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haptics are triggered when conditions are met to open task switcher or task scrub mode is engaged.
fixes related bug in task switcher gesture logic when invoked from homescreen

fixes https://invent.kde.org/plasma/plasma-mobile/-/issues/366
This commit is contained in:
Luis Büchi 2024-07-24 10:57:57 +00:00
parent 642392366b
commit 617ba59de7
2 changed files with 36 additions and 1 deletions
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33
kwin/mobiletaskswitcher/qml/TaskSwitcher.qml
View file

@ -39,6 +39,10 @@ FocusScope {
stateClass: TaskSwitcherData.TaskSwitcherState
}
MobileShell.HapticsEffect {
id: haptics
}
property var tasksModel: TaskSwitcherData.TaskFilterModel {
screenName: root.targetScreen.name
windowModel: TaskSwitcherData.TaskModel
@ -102,6 +106,12 @@ FocusScope {
taskSwitcherHelpers.isInTaskScrubMode = true;
taskSwitcherHelpers.cancelAnimations();
taskSwitcherHelpers.open();
if (!taskSwitcherHelpers.hasVibrated) {
// Haptic feedback when the task scrub mode engages
haptics.buttonVibrate();
taskSwitcherHelpers.hasVibrated = true;
}
}
let newTaskIndex = Math.max(0, Math.min(tasksCount - 1, Math.floor(state.touchXPosition / taskSwitcherHelpers.taskScrubDistance) + state.initialTaskIndex));
if (newTaskIndex != state.currentTaskIndex) {
@ -217,12 +227,33 @@ FocusScope {
taskSwitcherHelpers.open();
} else {
// no flick and not enough activation to go to task switcher
returnToApp();
if (state.wasInActiveTask) {
returnToApp();
} else {
// do open switcher in case we were on homescreen before
taskSwitcherHelpers.animateGoToTaskIndex(state.currentTaskIndex);
taskSwitcherHelpers.open();
}
}
}
}
}
function onVelocityChanged() {
if (!taskSwitcherHelpers.hasVibrated) {
if (!state.wasInActiveTask ||
(state.wasInActiveTask &&
state.yPosition > taskSwitcherHelpers.undoYThreshold &&
state.totalSquaredVelocity < state.flickVelocityThreshold)) {
// Haptic feedback when conditions are met for the task switcher to open
haptics.buttonVibrate();
taskSwitcherHelpers.hasVibrated = true;
}
}
}
function onXPositionChanged() {
taskSwitcherHelpers.updateTaskIndex();
}

4
kwin/mobiletaskswitcher/qml/TaskSwitcherHelpers.qml
View file

@ -33,6 +33,10 @@ QtObject {
// yPosition threshold below which opening the task switcher should be undone and returned to the previously active task
readonly property real undoYThreshold: openedYPosition / 2
// whether the switcher has already triggered haptic feedback or not
// we don't want to continuously send haptics, just once is enough
property bool hasVibrated: false
// ~~ measurement constants ~~
// dimensions of a real window on the screen