1 files changed, 139 insertions, 0 deletions
diff --git a/src/charts/axis/logvalueaxis/chartlogvalueaxisx.cpp b/src/charts/axis/logvalueaxis/chartlogvalueaxisx.cpp
new file mode 100644
index 00000000..6057fbb1
--- /dev/null
+++ b/src/charts/axis/logvalueaxis/chartlogvalueaxisx.cpp
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 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 Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise 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 "chartlogvalueaxisx_p.h"
+#include "chartpresenter_p.h"
+#include "qlogvalueaxis.h"
+#include "abstractchartlayout_p.h"
+#include <QGraphicsLayout>
+#include <qmath.h>
+#include <QDebug>
+
+QT_CHARTS_BEGIN_NAMESPACE
+
+ChartLogValueAxisX::ChartLogValueAxisX(QLogValueAxis *axis, QGraphicsItem *item)
+    : HorizontalAxis(axis, item),
+      m_axis(axis)
+{
+    QObject::connect(m_axis, SIGNAL(baseChanged(qreal)), this, SLOT(handleBaseChanged(qreal)));
+    QObject::connect(m_axis, SIGNAL(labelFormatChanged(QString)), this, SLOT(handleLabelFormatChanged(QString)));
+}
+
+ChartLogValueAxisX::~ChartLogValueAxisX()
+{
+}
+
+QVector<qreal> ChartLogValueAxisX::calculateLayout() const
+{
+    QVector<qreal> points;
+
+    qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
+    qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
+    qreal leftEdge = logMin < logMax ? logMin : logMax;
+    qreal ceilEdge = ceil(leftEdge);
+    int tickCount = qAbs(ceil(logMax) - ceil(logMin));
+
+    points.resize(tickCount);
+    const QRectF &gridRect = gridGeometry();
+    const qreal deltaX = gridRect.width() / qAbs(logMax - logMin);
+    for (int i = 0; i < tickCount; ++i)
+        points[i] = (ceilEdge + qreal(i)) * deltaX - leftEdge * deltaX + gridRect.left();
+
+    return points;
+}
+
+void ChartLogValueAxisX::updateGeometry()
+{
+    const QVector<qreal>& layout = ChartAxisElement::layout();
+    if (layout.isEmpty())
+        return;
+    setLabels(createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), layout.size(), m_axis->labelFormat()));
+    HorizontalAxis::updateGeometry();
+}
+
+void ChartLogValueAxisX::handleBaseChanged(qreal base)
+{
+    Q_UNUSED(base);
+    QGraphicsLayoutItem::updateGeometry();
+    if(presenter()) presenter()->layout()->invalidate();
+}
+
+void ChartLogValueAxisX::handleLabelFormatChanged(const QString &format)
+{
+    Q_UNUSED(format);
+    QGraphicsLayoutItem::updateGeometry();
+    if(presenter()) presenter()->layout()->invalidate();
+}
+
+QSizeF ChartLogValueAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
+{
+    Q_UNUSED(constraint)
+
+    QSizeF sh;
+
+    QSizeF base = HorizontalAxis::sizeHint(which, constraint);
+    QStringList ticksList;
+    qreal logMax = log10(m_axis->max()) / log10(m_axis->base());
+    qreal logMin = log10(m_axis->min()) / log10(m_axis->base());
+    int tickCount = qAbs(ceil(logMax) - ceil(logMin));
+    if (m_axis->max() > m_axis->min() && tickCount > 0)
+        ticksList = createLogValueLabels(m_axis->min(), m_axis->max(), m_axis->base(), tickCount, m_axis->labelFormat());
+    else
+        ticksList.append(QStringLiteral(" "));
+    // Width of horizontal axis sizeHint indicates the maximum distance labels can extend past
+    // first and last ticks. Base width is irrelevant.
+    qreal width = 0;
+    qreal height = 0;
+
+    switch (which) {
+    case Qt::MinimumSize:{
+        QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
+                                                               QStringLiteral("..."),
+                                                               axis()->labelsAngle());
+        width = boundingRect.width() / 2.0;
+        height = boundingRect.height() + labelPadding() + base.height() + 1.0;
+        sh = QSizeF(width, height);
+        break;
+    }
+    case Qt::PreferredSize: {
+        qreal labelHeight = 0.0;
+        qreal firstWidth = -1.0;
+        foreach (const QString& s, ticksList) {
+            QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
+            labelHeight = qMax(rect.height(), labelHeight);
+            width = rect.width();
+            if (firstWidth < 0.0)
+                firstWidth = width;
+        }
+        height = labelHeight + labelPadding() + base.height() + 1.0;
+        width = qMax(width, firstWidth) / 2.0;
+        sh = QSizeF(width, height);
+        break;
+    }
+    default:
+        break;
+    }
+
+    return sh;
+}
+
+#include "moc_chartlogvalueaxisx_p.cpp"
+
+QT_CHARTS_END_NAMESPACE