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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
import QtQuick 2.0
import QtQuick3D 1.15
DirectionalDraggable {
id: handleRoot
property string currentLabel
property point currentMousePos
property real fadeScale
property real baseScale: 5
property real dragScale: 1
scale: autoScaler.getScale(Qt.vector3d(baseScale, baseScale, baseScale))
length: 3
offset: -1.5
Model {
id: handle
source: "#Sphere"
materials: [ handleRoot.material ]
scale: Qt.vector3d(0.02, 0.02, 0.02)
}
AutoScaleHelper {
id: autoScaler
active: handleRoot.active
view3D: handleRoot.view3D
}
property real _q // quadratic fade
property real _l // linear fade
property real _c // constant fade
property real _d: 20 // Divisor from fadeScale calc in lightGizmo
property real _startScale
property real _startFadeScale
property string _currentProp
signal valueCommit(string propName)
signal valueChange(string propName)
function updateFade(relativeDistance, screenPos)
{
// Solved from fadeScale equation in LightGizmo
var newValue = 0;
var _x = Math.max(0, (_startFadeScale - (relativeDistance * _startScale)) / 100);
// Fades capped to range 0-10 because property editor caps them to that range
if (_currentProp === "quadraticFade") {
if (_x === 0)
newValue = 10;
else
newValue = Math.max(0, Math.min(10, -(_c - _d + (_l * _x)) / (_x * _x)));
if (newValue < 0.01)
newValue = 0; // To avoid having tiny positive value when UI shows 0.00
targetNode.quadraticFade = newValue;
} else if (_currentProp === "linearFade") {
if (_x === 0)
newValue = 10;
else
newValue = Math.max(0, Math.min(10, -(_c - _d) / _x));
if (newValue < 0.01)
newValue = 0; // To avoid having tiny positive value when UI shows 0.00
targetNode.linearFade = newValue;
} else {
// Since pure constant fade equates to infinitely long cone, fadeScale calc assumes
// linear fade of one in this case.
newValue = Math.max(0, Math.min(10, _d - _x));
targetNode.constantFade = newValue;
}
var l = Qt.locale();
handleRoot.currentLabel = _currentProp + qsTr(": ") + Number(newValue).toLocaleString(l, 'f', 2);
handleRoot.currentMousePos = screenPos;
}
onPressed: (mouseArea, screenPos)=> {
_startScale = autoScaler.relativeScale * baseScale * dragScale;
_startFadeScale = fadeScale;
_l = targetNode.linearFade;
_c = targetNode.constantFade;
_q = targetNode.quadraticFade;
if (targetNode.quadraticFade === 0) {
if (targetNode.linearFade === 0) {
_currentProp = "constantFade";
} else {
_currentProp = "linearFade";
}
} else {
_currentProp = "quadraticFade";
}
updateFade(0, screenPos);
}
onDragged: (mouseArea, sceneRelativeDistance, relativeDistance, screenPos)=> {
updateFade(relativeDistance, screenPos);
handleRoot.valueChange(_currentProp);
}
onReleased: (mouseArea, sceneRelativeDistance, relativeDistance, screenPos)=> {
updateFade(relativeDistance, screenPos);
handleRoot.valueCommit(_currentProp);
}
}
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