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83 lines
2.7 KiB
QML
83 lines
2.7 KiB
QML
/*
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SPDX-FileCopyrightText: 2020 Michail Vourlakos <mvourlakos@gmail.com>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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import QtQuick 2.0
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import org.kde.plasma.plasmoid 2.0
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import org.kde.plasma.core 2.0 as PlasmaCore
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import "./paraboliceffect" as ParabolicEffectTypes
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Item {
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property bool isEnabled: false
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property bool restoreZoomIsBlocked: false
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property int spread: 3
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property ParabolicEffectTypes.Factor factor: ParabolicEffectTypes.Factor{
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zoom: 1.6
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maxZoom: 1.6
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marginThicknessZoomInPercentage: 1.0
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}
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readonly property ParabolicEffectTypes.PrivateProperties _privates: ParabolicEffectTypes.PrivateProperties {
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directRenderingEnabled: false
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}
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property Item currentParabolicItem: null
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signal sglClearZoom();
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signal sglUpdateLowerItemScale(int delegateIndex, variant newScales);
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signal sglUpdateHigherItemScale(int delegateIndex, variant newScales);
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readonly property int _spreadSteps: (spread - 1) / 2
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function applyParabolicEffect(itemIndex, itemMousePosition, itemLength) {
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var percentage = Math.max(0, Math.min(1, itemMousePosition / itemLength));
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//! left scales
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var leftScales = [];
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for (var i=_spreadSteps; i>=1; --i) {
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leftScales.push(scaleForItem(1-percentage, i, _spreadSteps));
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}
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leftScales.push(1); //! clearing
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//! right scales
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var rightScales = [];
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for (var j=_spreadSteps; j>=1; --j) {
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rightScales.push(scaleForItem(percentage, j, _spreadSteps));
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}
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rightScales.push(1); //! clearing
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var reversed = Qt.application.layoutDirection === Qt.RightToLeft && (plasmoid.formFactor === PlasmaCore.Types.Horizontal);
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if (reversed) {
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var temp = leftScales;
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leftScales = rightScales;
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rightScales = temp;
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}
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sglUpdateHigherItemScale(itemIndex+1, rightScales);
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sglUpdateLowerItemScale(itemIndex-1, leftScales);
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return {leftScale:leftScales[0], rightScale:rightScales[0]};
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}
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function scaleForItem(mousePosPercentage, itemIndex, itemsCount) {
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//! split x axis to different slices and find for the current slice its minimum and maximum x values
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var xSliceLength = 1/itemsCount;
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var minX = (itemIndex-1) * xSliceLength;
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var maxX = itemIndex * xSliceLength;
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//! use minimum and maximum values in order to adjust mousePorPercentage and provide the current x for that slice
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var curX = minX + (maxX-minX) * mousePosPercentage;
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return 1+scaleLinear(curX);
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}
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function scaleLinear(x) {
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//! just a simple linear function y=a*x where [a = maxZoom - 1]
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return (factor.zoom - 1) * x;
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}
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}
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