horizontalaxis.cpp
136 lines
| 5.0 KiB
| text/x-c
|
CppLexer
Michal Klocek
|
r2111 | /**************************************************************************** | ||
| ** | ||||
| ** 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 "horizontalaxis_p.h" | ||||
| #include "qabstractaxis.h" | ||||
| #include <QFontMetrics> | ||||
| #include <QDebug> | ||||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
| HorizontalAxis::HorizontalAxis(QAbstractAxis *axis, ChartPresenter *presenter):ChartAxis(axis,presenter) | ||||
| { | ||||
| } | ||||
| HorizontalAxis::~HorizontalAxis() | ||||
| { | ||||
| } | ||||
| void HorizontalAxis::updateGeometry() | ||||
| { | ||||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
| if(layout.isEmpty()) return; | ||||
| QStringList ticksList = labels(); | ||||
| QList<QGraphicsItem *> lines = lineItems(); | ||||
| QList<QGraphicsItem *> labels = labelItems(); | ||||
| QList<QGraphicsItem *> shades = shadeItems(); | ||||
| QList<QGraphicsItem *> axis = arrowItems(); | ||||
| Q_ASSERT(labels.size() == ticksList.size()); | ||||
| Q_ASSERT(layout.size() == ticksList.size()); | ||||
| const QRectF& axisRect = axisGeometry(); | ||||
| const QRectF& gridRect = gridGeometry(); | ||||
| //arrow | ||||
| QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem*>(axis.at(0)); | ||||
| if (alignment()==Qt::AlignTop) | ||||
| arrowItem->setLine(gridRect.left(), axisRect.bottom(), gridRect.right(), axisRect.bottom()); | ||||
| else if(alignment()==Qt::AlignBottom) | ||||
| arrowItem->setLine(gridRect.left(), axisRect.top(), gridRect.right(), axisRect.top()); | ||||
| qreal width = 0; | ||||
| for (int i = 0; i < layout.size(); ++i) { | ||||
| QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
| QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem*>(axis.at(i+1)); | ||||
| QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem*>(labels.at(i)); | ||||
| //grid line | ||||
| gridItem->setLine(layout[i], gridRect.top(), layout[i], gridRect.bottom()); | ||||
| //label text | ||||
| labelItem->setText(ticksList.at(i)); | ||||
| const QRectF& rect = labelItem->boundingRect(); | ||||
| QPointF center = rect.center(); | ||||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
| //ticks and label position | ||||
| if (alignment()==Qt::AlignTop){ | ||||
| labelItem->setPos(layout[i] - center.x(), axisRect.bottom() - rect.height() - labelPadding()); | ||||
| tickItem->setLine(layout[i],axisRect.bottom(),layout[i],axisRect.bottom() - labelPadding()); | ||||
| }else if(alignment()==Qt::AlignBottom){ | ||||
| labelItem->setPos(layout[i] - center.x(), axisRect.top() + labelPadding()); | ||||
| tickItem->setLine(layout[i],axisRect.top(),layout[i],axisRect.top() + labelPadding()); | ||||
| } | ||||
| if(labelBetweenTicks()&& i+1!=layout.size()) { | ||||
| const qreal delta = (layout[i+1] - layout[i])/2; | ||||
| labelItem->setPos(layout[i] + delta - center.x(), labelItem->pos().y()); | ||||
| } | ||||
| //overlap detection | ||||
| if(labelItem->pos().x() <= width || | ||||
| labelItem->pos().x() < axisRect.left() || | ||||
| labelItem->pos().x() + rect.width() > axisRect.right()) { | ||||
| labelItem->setVisible(false); | ||||
| gridItem->setVisible(false); | ||||
| tickItem->setVisible(false); | ||||
| } | ||||
| else { | ||||
| labelItem->setVisible(true); | ||||
| gridItem->setVisible(true); | ||||
| tickItem->setVisible(true); | ||||
| width=rect.width()+labelItem->pos().x(); | ||||
| } | ||||
| //shades | ||||
| if ((i+1)%2 && i>1) { | ||||
| QGraphicsRectItem *rectItem = static_cast<QGraphicsRectItem*>(shades.at(i/2-1)); | ||||
| rectItem->setRect(layout[i-1],gridRect.top(),layout[i]-layout[i-1],gridRect.height()); | ||||
| } | ||||
| // check if the grid line and the axis tick should be shown | ||||
| qreal x = gridItem->line().p1().x(); | ||||
| if (x < gridRect.left() || x > gridRect.right()) { | ||||
| gridItem->setVisible(false); | ||||
| tickItem->setVisible(false); | ||||
| if( labelBetweenTicks() && ( labelItem->pos().x() < gridRect.left() || labelItem->pos().x() + rect.width() > gridRect.right())) | ||||
| labelItem->setVisible(false); | ||||
| } | ||||
| } | ||||
| //begin/end grid line in case labels between | ||||
| if(labelBetweenTicks()) { | ||||
| QGraphicsLineItem *gridLine; | ||||
| gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size())); | ||||
| gridLine->setLine(gridRect.right(), gridRect.top(), gridRect.right(), gridRect.bottom()); | ||||
| gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size()+1)); | ||||
| gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.left(), gridRect.bottom()); | ||||
| } | ||||
| } | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||