65 lines
1.7 KiB
JavaScript
65 lines
1.7 KiB
JavaScript
// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
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const Lang = imports.lang;
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const Signals = imports.signals;
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const Clutter = imports.gi.Clutter;
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//in milliseconds
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let LONG_PRESS_TIMEOUT = 250;
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let MOTION_THRESHOLD = 30;
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const AppSwitchAction = new Lang.Class({
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Name: 'AppSwitchAction',
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Extends: Clutter.GestureAction,
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_init : function() {
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this.parent();
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this.set_n_touch_points (3);
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global.display.connect('grab-op-begin', Lang.bind(this, this.cancel));
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global.display.connect('grab-op-end', Lang.bind(this, this.cancel));
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},
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vfunc_gesture_prepare : function(action, actor) {
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return this.get_n_current_points() <= 4;
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},
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vfunc_gesture_begin : function(action, actor) {
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let nPoints = this.get_n_current_points();
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let event = this.get_last_event (nPoints - 1);
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if (nPoints == 3)
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this._longPressStartTime = event.get_time();
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else if (nPoints == 4) {
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// Check whether the 4th finger press happens after a 3-finger long press,
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// this only needs to be checked on the first 4th finger press
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if (this._longPressStartTime != null &&
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event.get_time() < this._longPressStartTime + LONG_PRESS_TIMEOUT)
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this.cancel();
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else {
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this._longPressStartTime = null;
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this.emit('activated');
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}
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}
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return this.get_n_current_points() <= 4;
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},
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vfunc_gesture_progress : function(action, actor) {
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if (this.get_n_current_points() == 3) {
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for (let i = 0; i < this.get_n_current_points(); i++) {
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[startX, startY] = this.get_press_coords(i);
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[x, y] = this.get_motion_coords(i);
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if (Math.abs(x - startX) > MOTION_THRESHOLD ||
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Math.abs(y - startY) > MOTION_THRESHOLD)
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return false;
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}
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}
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return true;
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}
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});
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Signals.addSignalMethods(AppSwitchAction.prototype);
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