chartvaluesaxisy.cpp
139 lines
| 4.6 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
| #include "chartvaluesaxisy_p.h" | ||||
| #include "qabstractaxis.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "chartanimator_p.h" | ||||
| #include <QGraphicsLayout> | ||||
| #include <QDebug> | ||||
| #include <QFontMetrics> | ||||
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r1561 | #include <cmath> | ||
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r1555 | |||
| static int label_padding = 5; | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
| ChartValuesAxisY::ChartValuesAxisY(QAbstractAxis *axis,ChartPresenter *presenter) : ChartAxis(axis,presenter) | ||||
| { | ||||
| } | ||||
| ChartValuesAxisY::~ChartValuesAxisY() | ||||
| { | ||||
| } | ||||
| QVector<qreal> ChartValuesAxisY::calculateLayout() const | ||||
| { | ||||
| Q_ASSERT(m_ticksCount>=2); | ||||
| QVector<qreal> points; | ||||
| points.resize(m_ticksCount); | ||||
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r1561 | const qreal deltaY = m_rect.height()/(m_ticksCount-1); | ||
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r1555 | for (int i = 0; i < m_ticksCount; ++i) { | ||
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r1561 | int y = i * -deltaY + m_rect.bottom(); | ||
| points[i] = y; | ||||
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r1555 | } | ||
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r1561 | |||
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r1555 | return points; | ||
| } | ||||
| void ChartValuesAxisY::updateGeometry() | ||||
| { | ||||
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r1561 | const QVector<qreal> &layout = ChartAxis::layout(); | ||
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r1555 | m_minWidth = 0; | ||
| m_minHeight = 0; | ||||
| if(layout.isEmpty()) return; | ||||
| QStringList ticksList; | ||||
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r1561 | int ticks = layout.size(); | ||
| int n = qMax(int(-floor(log10((m_max-m_min)/(ticks-1)))),0); | ||||
| n++; | ||||
| for (int i=0; i< ticks; i++) { | ||||
| qreal value = m_min + (i * (m_max - m_min)/ (ticks-1)); | ||||
| Q_UNUSED(value); | ||||
| ticksList << QString::number(value,'f',n); | ||||
| } | ||||
| bool categories = false; | ||||
| // bool categories = createLabels(ticksList,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(); | ||||
| QList<QGraphicsItem *> axis = m_axis->childItems(); | ||||
| Q_ASSERT(labels.size() == ticksList.size()); | ||||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
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r1561 | qreal height = 2*m_rect.bottom(); | ||
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r1555 | QGraphicsLineItem *lineItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||
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r1561 | lineItem->setLine(m_rect.left() , m_rect.top(), m_rect.left(), m_rect.bottom()); | ||
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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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r1561 | lineItem->setLine(m_rect.left() , layout[i], m_rect.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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r1555 | if (!categories || i<1) { | ||
| labelItem->setText(ticksList.at(i)); | ||||
| 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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r1561 | labelItem->setPos(m_rect.left() - rect.width() - label_padding , layout[i]-center.y()); | ||
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r1555 | |||
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r1561 | if(labelItem->pos().y()+rect.height()>height) { | ||
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r1555 | labelItem->setVisible(false); | ||
| lineItem->setVisible(false); | ||||
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r1561 | } | ||
| 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 | |||
| m_minWidth=qMax(rect.width()+label_padding,m_minWidth); | ||||
| m_minHeight+=rect.height(); | ||||
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r1555 | } | ||
| else { | ||||
| labelItem->setText(ticksList.at(i)); | ||||
| const QRectF& rect = labelItem->boundingRect(); | ||||
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r1561 | m_minWidth=qMax(rect.width(),m_minWidth); | ||
| m_minHeight+=rect.height(); | ||||
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r1555 | QPointF center = rect.center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
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r1561 | labelItem->setPos(m_rect.left() - rect.width() - label_padding , layout[i] - (layout[i] - layout[i-1])/2 -center.y()); | ||
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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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r1561 | rectItem->setRect(m_rect.left(),layout[i],m_rect.width(),layout[i-1]-layout[i]); | ||
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r1555 | } | ||
| lineItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
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r1561 | lineItem->setLine(m_rect.left()-5,layout[i],m_rect.left(),layout[i]); | ||
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r1555 | } | ||
| } | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||