polarchartlogvalueaxisradial.cpp
95 lines
| 3.3 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
|
r2483 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2013 Digia Plc | ||||
| ** All rights reserved. | ||||
| ** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
| ** | ||||
| ** This file is part of the Qt Commercial Charts Add-on. | ||||
| ** | ||||
| ** $QT_BEGIN_LICENSE$ | ||||
| ** Licensees holding valid Qt Commercial licenses may use this file in | ||||
| ** accordance with the Qt Commercial License Agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and Digia. | ||||
| ** | ||||
| ** If you have questions regarding the use of this file, please use | ||||
| ** contact form at http://qt.digia.com | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
| #include "polarchartlogvalueaxisradial_p.h" | ||||
| #include "abstractchartlayout_p.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "qlogvalueaxis.h" | ||||
| #include <qmath.h> | ||||
| #include <QDebug> | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
| PolarChartLogValueAxisRadial::PolarChartLogValueAxisRadial(QLogValueAxis *axis, QGraphicsItem *item) | ||||
| : PolarChartAxisRadial(axis, item) | ||||
| { | ||||
| QObject::connect(axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal))); | ||||
| QObject::connect(axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString))); | ||||
| } | ||||
| PolarChartLogValueAxisRadial::~PolarChartLogValueAxisRadial() | ||||
| { | ||||
| } | ||||
| QVector<qreal> PolarChartLogValueAxisRadial::calculateLayout() const | ||||
| { | ||||
| QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); | ||||
| const qreal logMax = log10(logValueAxis->max()) / log10(logValueAxis->base()); | ||||
| const qreal logMin = log10(logValueAxis->min()) / log10(logValueAxis->base()); | ||||
| const qreal innerEdge = logMin < logMax ? logMin : logMax; | ||||
| const qreal outerEdge = logMin > logMax ? logMin : logMax; | ||||
| const qreal delta = (axisGeometry().width() / 2.0) / qAbs(logMax - logMin); | ||||
| const qreal initialSpan = (ceil(innerEdge) - innerEdge) * delta; | ||||
| int tickCount = qAbs(ceil(logMax) - ceil(logMin)); | ||||
| // Extra tick if outer edge is exactly at the tick | ||||
| if (outerEdge == ceil(outerEdge)) | ||||
| tickCount++; | ||||
| QVector<qreal> points; | ||||
| points.resize(tickCount); | ||||
| for (int i = 0; i < tickCount; ++i) { | ||||
| qreal radialCoordinate = initialSpan + (delta * qreal(i)); | ||||
| points[i] = radialCoordinate; | ||||
| } | ||||
| return points; | ||||
| } | ||||
| void PolarChartLogValueAxisRadial::createAxisLabels(const QVector<qreal> &layout) | ||||
| { | ||||
| QLogValueAxis *logValueAxis = static_cast<QLogValueAxis *>(axis()); | ||||
| setLabels(createLogValueLabels(logValueAxis->min(), | ||||
| logValueAxis->max(), | ||||
| logValueAxis->base(), | ||||
| layout.size(), | ||||
| logValueAxis->labelFormat())); | ||||
| } | ||||
| void PolarChartLogValueAxisRadial::handleBaseChanged(qreal base) | ||||
| { | ||||
| Q_UNUSED(base); | ||||
| QGraphicsLayoutItem::updateGeometry(); | ||||
| if (presenter()) | ||||
| presenter()->layout()->invalidate(); | ||||
| } | ||||
| void PolarChartLogValueAxisRadial::handleLabelFormatChanged(const QString &format) | ||||
| { | ||||
| Q_UNUSED(format); | ||||
| QGraphicsLayoutItem::updateGeometry(); | ||||
| if (presenter()) | ||||
| presenter()->layout()->invalidate(); | ||||
| } | ||||
| #include "moc_polarchartlogvalueaxisradial_p.cpp" | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||