Kstars

nonlineardoublespinbox.cpp
1/*
2 SPDX-FileCopyrightText: 2017 Robert Lancaster <rlancaste@gmail.com>
3
4 Based on an idea discussed in the QT Centre: http://www.qtcentre.org/threads/47535-QDoubleSpinBox-with-nonlinear-values
5
6 SPDX-License-Identifier: GPL-2.0-or-later
7*/
8
9#include "auxiliary/nonlineardoublespinbox.h"
10
11NonLinearDoubleSpinBox::NonLinearDoubleSpinBox(QWidget *parent) : QDoubleSpinBox(parent)
12{
13 m_Values << 0.01 << 0.02 << 0.05 << 0.1 << 0.2 << 0.25 << 0.5 << 1 << 1.5 << 2 << 2.5 << 3 << 5 << 6 << 7 << 8 << 9 << 10 << 20 << 30 << 40 << 50 << 60 << 120 << 180 << 300 << 600 << 900;
14 setRange(m_Values.first() , m_Values.last());
15
16 //This will update the _idx variable to the index of the new value. It will give -1 if not in the list, and the index if it is in the list.
17 connect(this, static_cast<void(QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
18 [=](double d){ m_idx = m_Values.indexOf(d); });
19}
20
21void NonLinearDoubleSpinBox::stepBy(int steps)
22{
23 // If the current value is not currently in the list, it will find where the value falls in the list and set it to the
24 // appropriate one whether going up or down.
25 if(m_idx == -1)
26 {
27 int i = 0;
28 while(value() > m_Values.at(i))
29 i++;
30 if(steps > 0 )
31 m_idx = i;
32 else
33 m_idx = i - 1;
34 }
35 else
36 m_idx += steps;
37
38 //This makes sure that it doesn't go past the ends of the list.
39 if(m_idx<0)
40 m_idx=0;
41 else if(m_idx >= m_Values.count())
42 m_idx = m_Values.count()-1;
43
44 //This sets the value to the value at that index in the list.
45 setValue( m_Values.at(m_idx) );
46}
47
48void NonLinearDoubleSpinBox::setRecommendedValues(QList<double> values)
49{
50 m_Values = values;
51 updateRecommendedValues();
52}
53
54void NonLinearDoubleSpinBox::addRecommendedValue(double v)
55{
56 m_Values.append(v); //This will be sorted into place in the next command.
57 updateRecommendedValues();
58}
59
60void NonLinearDoubleSpinBox::updateRecommendedValues()
61{
62 std::sort(m_Values.begin(), m_Values.end()); //This will make sure they are all in order.
63 m_idx = m_Values.indexOf(value()); //This will update the _idx variable to the index of the new value. It will search for current value in the new list or set it to negative 1 if it isn't in the list.
64 setRange(m_Values.first() , m_Values.last());
65 //This makes sure all the values are in the range. The range is expanded if necessary.
66 if(m_Values.first() < minimum())
67 setMinimum(m_Values.first());
68 if(m_Values.last() > maximum())
69 setMaximum(m_Values.last());
70}
71
72QList<double> NonLinearDoubleSpinBox::getRecommendedValues()
73{
74 return m_Values;
75}
76
77QString NonLinearDoubleSpinBox::getRecommendedValuesString()
78{
80 for(int i=0; i < m_Values.size() - 1; i++)
81 returnString += QString::number(m_Values.at(i)) + ", ";
82 returnString += QString::number(m_Values.last());
83 return returnString;
84}
void setRange(double minimum, double maximum)
void valueChanged(double d)
void append(QList< T > &&value)
const_reference at(qsizetype i) const const
iterator begin()
qsizetype count() const const
iterator end()
T & first()
qsizetype indexOf(const AT &value, qsizetype from) const const
T & last()
qsizetype size() const const
QString number(double n, char format, int precision)
QFuture< ArgsType< Signal > > connect(Sender *sender, Signal signal)
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