chartvalueaxisy.cpp
175 lines
| 5.6 KiB
| text/x-c
|
CppLexer
Marek Rosa
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r1555 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2012 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
|
Marek Rosa
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r1805 | #include "chartvalueaxisy_p.h" | ||
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r1555 | #include "qabstractaxis.h" | ||
| #include "chartpresenter_p.h" | ||||
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r1805 | #include "qvalueaxis.h" | ||
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r1555 | #include <QGraphicsLayout> | ||
| #include <QFontMetrics> | ||||
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r1735 | #include <qmath.h> | ||
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r1965 | #include <QDebug> | ||
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r1555 | |||
| static int label_padding = 5; | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r1805 | ChartValueAxisY::ChartValueAxisY(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter), | ||
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r1698 | m_tickCount(0) | ||
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r1555 | { | ||
| } | ||||
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r1805 | ChartValueAxisY::~ChartValueAxisY() | ||
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r1555 | { | ||
| } | ||||
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r1805 | QVector<qreal> ChartValueAxisY::calculateLayout() const | ||
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r1555 | { | ||
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r1698 | Q_ASSERT(m_tickCount>=2); | ||
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r1555 | |||
| QVector<qreal> points; | ||||
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r1698 | points.resize(m_tickCount); | ||
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r1555 | |||
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r1965 | QRectF rect = presenter()->chartsGeometry(); | ||
| const qreal deltaY = rect.height()/(m_tickCount-1); | ||||
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r1698 | for (int i = 0; i < m_tickCount; ++i) { | ||
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r1965 | int y = i * -deltaY + rect.bottom(); | ||
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r1561 | points[i] = y; | ||
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r1555 | } | ||
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r1561 | |||
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r1555 | return points; | ||
| } | ||||
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r1805 | void ChartValueAxisY::updateGeometry() | ||
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r1555 | { | ||
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r1561 | const QVector<qreal> &layout = ChartAxis::layout(); | ||
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r1555 | |||
| if(layout.isEmpty()) return; | ||||
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r1965 | QStringList ticksList = createNumberLabels(m_min,m_max,layout.size()); | ||
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r1555 | |||
| QList<QGraphicsItem *> lines = m_grid->childItems(); | ||||
| QList<QGraphicsItem *> labels = m_labels->childItems(); | ||||
| QList<QGraphicsItem *> shades = m_shades->childItems(); | ||||
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r1729 | QList<QGraphicsItem *> axis = m_arrow->childItems(); | ||
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r1555 | |||
| Q_ASSERT(labels.size() == ticksList.size()); | ||||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
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r1965 | QRectF chartRect = presenter()->chartsGeometry(); | ||
| qreal height = m_rect.bottom(); | ||||
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r1561 | |||
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r1555 | QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||
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r1965 | lineItem->setLine( chartRect.left() , chartRect.top(), chartRect.left(), chartRect.bottom()); | ||
| QFontMetrics fn(m_font); | ||||
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r1555 | |||
| for (int i = 0; i < layout.size(); ++i) { | ||||
| QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
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r1965 | lineItem->setLine( chartRect.left() , layout[i], chartRect.right(), layout[i]); | ||
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r1555 | QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||
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r1561 | |||
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r1965 | QString text = ticksList.at(i); | ||
| if (fn.boundingRect(text).width() > chartRect.left() - m_rect.left() - label_padding ) | ||||
| { | ||||
| QString label = text + "..."; | ||||
| while (fn.boundingRect(label).width() > chartRect.left() - m_rect.left() - label_padding && label.length() > 3) | ||||
| label.remove(label.length() - 4, 1); | ||||
| labelItem->setText(label); | ||||
| }else{ | ||||
| labelItem->setText(text); | ||||
| } | ||||
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r1555 | const QRectF& rect = labelItem->boundingRect(); | ||
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r1561 | |||
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r1555 | QPointF center = rect.center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
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r1965 | labelItem->setPos( chartRect.left() - rect.width() - label_padding , layout[i]-center.y()); | ||
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r1555 | |||
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r1965 | if(labelItem->pos().y() + rect.height() > height || | ||
| labelItem->pos().y() < m_rect.top()) { | ||||
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r1555 | labelItem->setVisible(false); | ||
| lineItem->setVisible(false); | ||||
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r1965 | }else{ | ||
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r1555 | labelItem->setVisible(true); | ||
| lineItem->setVisible(true); | ||||
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r1561 | height=labelItem->pos().y(); | ||
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r1555 | } | ||
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r1561 | |||
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r1555 | if ((i+1)%2 && i>1) { | ||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
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r1965 | rectItem->setRect( chartRect.left(),layout[i], chartRect.width(),layout[i-1]-layout[i]); | ||
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r1555 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
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r1965 | lineItem->setLine( chartRect.left()-5,layout[i], chartRect.left(),layout[i]); | ||
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r1555 | } | ||
| } | ||||
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r1805 | void ChartValueAxisY::handleAxisUpdated() | ||
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r1698 | { | ||
| //TODO:: fix this | ||||
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r1804 | QValueAxis* axis = qobject_cast<QValueAxis*>(m_chartAxis); | ||
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r1807 | m_tickCount = axis->tickCount(); | ||
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r1698 | ChartAxis::handleAxisUpdated(); | ||
| } | ||||
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r1965 | QSizeF ChartValueAxisY::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const | ||
| { | ||||
| Q_UNUSED(constraint) | ||||
| QFontMetrics fn(m_font); | ||||
| QSizeF sh; | ||||
| QSizeF base = ChartAxis::sizeHint(which, constraint); | ||||
| QStringList ticksList = createNumberLabels(m_min,m_max,m_tickCount); | ||||
| qreal width=0; | ||||
| qreal height=0; | ||||
| switch (which) { | ||||
| case Qt::MinimumSize: { | ||||
| int count = qMax(ticksList.first().count() , ticksList.last().count()); | ||||
| width=fn.averageCharWidth()*count+label_padding; | ||||
| height=fn.height(); | ||||
| height=qMax(height,base.height()); | ||||
| width+=base.width(); | ||||
| sh = QSizeF(width,height); | ||||
| break; | ||||
| } | ||||
| case Qt::PreferredSize: | ||||
| { | ||||
| for (int i = 0; i < ticksList.size(); ++i) | ||||
| { | ||||
| width=qMax(qreal(fn.averageCharWidth()*ticksList.at(i).count())+label_padding,width); | ||||
| height+=fn.height(); | ||||
| } | ||||
| height=qMax(height,base.height()); | ||||
| width+=base.width(); | ||||
| sh = QSizeF(width,height); | ||||
| break; | ||||
| } | ||||
| default: | ||||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
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Michal Klocek
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r1698 | |||
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Marek Rosa
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r1555 | QTCOMMERCIALCHART_END_NAMESPACE | ||