| 1 | /* |
|---|---|
| 2 | * This file is part of KQuickCharts |
| 3 | * SPDX-FileCopyrightText: 2019 Marco Martin <mart@kde.org> |
| 4 | * SPDX-FileCopyrightText: 2019 David Edmundson <davidedmundson@kde.org> |
| 5 | * SPDX-FileCopyrightText: 2019 Arjen Hiemstra <ahiemstra@heimr.nl> |
| 6 | * |
| 7 | * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL |
| 8 | */ |
| 9 | |
| 10 | #include "ColorGradientSource.h" |
| 11 | |
| 12 | #include <QVariant> |
| 13 | |
| 14 | #include <QDebug> |
| 15 | |
| 16 | ColorGradientSource::ColorGradientSource(QObject *parent) |
| 17 | : ChartDataSource(parent) |
| 18 | { |
| 19 | } |
| 20 | |
| 21 | int ColorGradientSource::itemCount() const |
| 22 | { |
| 23 | return m_itemCount; |
| 24 | } |
| 25 | |
| 26 | QVariant ColorGradientSource::item(int index) const |
| 27 | { |
| 28 | if (index < 0 || index >= m_colors.size()) { |
| 29 | return QVariant{}; |
| 30 | } |
| 31 | |
| 32 | return m_colors.at(i: index); |
| 33 | } |
| 34 | |
| 35 | QVariant ColorGradientSource::minimum() const |
| 36 | { |
| 37 | return QVariant{}; |
| 38 | } |
| 39 | |
| 40 | QVariant ColorGradientSource::maximum() const |
| 41 | { |
| 42 | return QVariant{}; |
| 43 | } |
| 44 | |
| 45 | QColor ColorGradientSource::baseColor() const |
| 46 | { |
| 47 | return m_baseColor; |
| 48 | } |
| 49 | |
| 50 | void ColorGradientSource::setBaseColor(const QColor &newBaseColor) |
| 51 | { |
| 52 | if (newBaseColor == m_baseColor) { |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | m_baseColor = newBaseColor; |
| 57 | regenerateColors(); |
| 58 | Q_EMIT baseColorChanged(); |
| 59 | } |
| 60 | |
| 61 | void ColorGradientSource::setItemCount(int newItemCount) |
| 62 | { |
| 63 | if (newItemCount == m_itemCount) { |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | m_itemCount = newItemCount; |
| 68 | regenerateColors(); |
| 69 | Q_EMIT itemCountChanged(); |
| 70 | } |
| 71 | |
| 72 | QVariantList ColorGradientSource::colors() const |
| 73 | { |
| 74 | QVariantList colorsVariant; |
| 75 | colorsVariant.reserve(asize: m_colors.count()); |
| 76 | for (const QColor &color : std::as_const(t: m_colors)) { |
| 77 | colorsVariant.append(t: color); |
| 78 | } |
| 79 | return colorsVariant; |
| 80 | } |
| 81 | |
| 82 | void ColorGradientSource::regenerateColors() |
| 83 | { |
| 84 | if (!m_baseColor.isValid() || m_itemCount <= 0) { |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | m_colors.clear(); |
| 89 | |
| 90 | for (int i = 0; i < m_itemCount; ++i) { |
| 91 | auto newHue = m_baseColor.hsvHueF() + i * (1.0 / m_itemCount); |
| 92 | newHue = newHue - int(newHue); |
| 93 | m_colors.append(t: QColor::fromHsvF(h: newHue, s: m_baseColor.saturationF(), v: m_baseColor.valueF(), a: m_baseColor.alphaF())); |
| 94 | } |
| 95 | |
| 96 | Q_EMIT dataChanged(); |
| 97 | } |
| 98 | |
| 99 | #include "moc_ColorGradientSource.cpp" |
| 100 |