horizontalaxis.cpp
207 lines
| 7.3 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> | ||||
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r2133 | #include <qmath.h> | ||
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r2111 | #include <QDebug> | ||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r2273 | HorizontalAxis::HorizontalAxis(QAbstractAxis *axis, QGraphicsItem* item , bool intervalAxis) | ||
| : ChartAxis(axis, item, intervalAxis) | ||||
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r2111 | { | ||
| } | ||||
| HorizontalAxis::~HorizontalAxis() | ||||
| { | ||||
| } | ||||
| void HorizontalAxis::updateGeometry() | ||||
| { | ||||
| const QVector<qreal>& layout = ChartAxis::layout(); | ||||
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r2131 | if (layout.isEmpty()) | ||
| return; | ||||
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r2111 | |||
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r2133 | QStringList labelList = labels(); | ||
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r2111 | |||
| QList<QGraphicsItem *> lines = lineItems(); | ||||
| QList<QGraphicsItem *> labels = labelItems(); | ||||
| QList<QGraphicsItem *> shades = shadeItems(); | ||||
| QList<QGraphicsItem *> axis = arrowItems(); | ||||
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r2139 | QGraphicsSimpleTextItem* title = titleItem(); | ||
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r2111 | |||
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r2133 | Q_ASSERT(labels.size() == labelList.size()); | ||
| Q_ASSERT(layout.size() == labelList.size()); | ||||
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r2111 | |||
|
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r2131 | const QRectF &axisRect = axisGeometry(); | ||
| const QRectF &gridRect = gridGeometry(); | ||||
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r2111 | |||
| //arrow | ||||
|
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r2131 | QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem *>(axis.at(0)); | ||
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r2111 | |||
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r2131 | if (alignment() == Qt::AlignTop) | ||
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r2111 | arrowItem->setLine(gridRect.left(), axisRect.bottom(), gridRect.right(), axisRect.bottom()); | ||
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r2131 | else if (alignment() == Qt::AlignBottom) | ||
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r2111 | arrowItem->setLine(gridRect.left(), axisRect.top(), gridRect.right(), axisRect.top()); | ||
| qreal width = 0; | ||||
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r2133 | QFontMetrics fn(font()); | ||
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r2111 | |||
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r2148 | //title | ||
| if (!titleText().isNull()) { | ||||
| QFontMetrics fn(title->font()); | ||||
| int size(0); | ||||
| size = gridRect.width(); | ||||
| QString titleText = this->titleText(); | ||||
| if (fn.boundingRect(titleText).width() > size) { | ||||
| QString string = titleText + "..."; | ||||
| while (fn.boundingRect(string).width() > size && string.length() > 3) | ||||
| string.remove(string.length() - 4, 1); | ||||
| title->setText(string); | ||||
| } else { | ||||
| title->setText(titleText); | ||||
| } | ||||
| QPointF center = gridRect.center() - title->boundingRect().center(); | ||||
| if (alignment() == Qt::AlignTop) { | ||||
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r2413 | title->setPos(center.x(), axisRect.top() + titlePadding()); | ||
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r2148 | } else if (alignment() == Qt::AlignBottom) { | ||
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r2413 | title->setPos(center.x(), axisRect.bottom() - title->boundingRect().height() - titlePadding()); | ||
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r2148 | } | ||
| } | ||||
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r2111 | for (int i = 0; i < layout.size(); ++i) { | ||
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r2133 | //items | ||
| QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem*>(lines.at(i)); | ||||
| QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem*>(axis.at(i + 1)); | ||||
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r2131 | QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem *>(labels.at(i)); | ||
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r2111 | |||
| //grid line | ||||
| gridItem->setLine(layout[i], gridRect.top(), layout[i], gridRect.bottom()); | ||||
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r2133 | //label text wrapping | ||
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r2412 | QString text = labelList.at(i); | ||
| QRectF boundingRect = labelBoundingRect(fn, text); | ||||
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r2413 | qreal size = axisRect.bottom() - axisRect.top() - labelPadding() - title->boundingRect().height() - (titlePadding() * 2); | ||
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r2412 | if (boundingRect.height() > size) { | ||
| QString label = text + "..."; | ||||
| while (boundingRect.height() >= size && label.length() > 3) { | ||||
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r2133 | label.remove(label.length() - 4, 1); | ||
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r2412 | boundingRect = labelBoundingRect(fn, label); | ||
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r2133 | } | ||
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r2412 | labelItem->setText(label); | ||
| } else { | ||||
| labelItem->setText(text); | ||||
|
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r2133 | } | ||
| //label transformation origin point | ||||
| const QRectF& rect = labelItem->boundingRect(); | ||||
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r2111 | QPointF center = rect.center(); | ||
| labelItem->setTransformOriginPoint(center.x(), center.y()); | ||||
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r2412 | int heightDiff = rect.height() - boundingRect.height(); | ||
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r2111 | |||
| //ticks and label position | ||||
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r2131 | if (alignment() == Qt::AlignTop) { | ||
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r2412 | labelItem->setPos(layout[i] - center.x(), axisRect.bottom() - rect.height() + (heightDiff / 2) - labelPadding()); | ||
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r2131 | tickItem->setLine(layout[i], axisRect.bottom(), layout[i], axisRect.bottom() - labelPadding()); | ||
| } else if (alignment() == Qt::AlignBottom) { | ||||
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r2412 | labelItem->setPos(layout[i] - center.x(), axisRect.top() - (heightDiff / 2) + labelPadding()); | ||
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r2131 | tickItem->setLine(layout[i], axisRect.top(), layout[i], axisRect.top() + labelPadding()); | ||
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r2111 | } | ||
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r2133 | //label in beetwen | ||
| if(intervalAxis()&& i+1!=layout.size()) { | ||||
| const qreal delta = (layout[i+1] - layout[i])/2; | ||||
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r2111 | labelItem->setPos(layout[i] + delta - center.x(), labelItem->pos().y()); | ||
| } | ||||
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r2133 | //label overlap detection | ||
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r2145 | if(labelItem->pos().x() < width || | ||
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r2353 | labelItem->pos().x() < axisRect.left() || | ||
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r2412 | labelItem->pos().x() + boundingRect.width() -1 > axisRect.right()){ | ||
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r2111 | labelItem->setVisible(false); | ||
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r2145 | } else { | ||
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r2111 | labelItem->setVisible(true); | ||
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r2412 | width = boundingRect.width() + labelItem->pos().x(); | ||
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r2111 | } | ||
| //shades | ||||
|
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r2131 | 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()); | ||||
|
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r2111 | } | ||
| // 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()) { | ||||
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r2131 | gridItem->setVisible(false); | ||
| tickItem->setVisible(false); | ||||
|
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r2133 | }else{ | ||
| gridItem->setVisible(true); | ||||
| tickItem->setVisible(true); | ||||
|
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r2111 | } | ||
| } | ||||
| //begin/end grid line in case labels between | ||||
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r2131 | if (intervalAxis()) { | ||
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r2111 | QGraphicsLineItem *gridLine; | ||
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r2131 | gridLine = static_cast<QGraphicsLineItem *>(lines.at(layout.size())); | ||
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r2111 | gridLine->setLine(gridRect.right(), gridRect.top(), gridRect.right(), gridRect.bottom()); | ||
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r2133 | gridLine->setVisible(true); | ||
| gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size()+1)); | ||||
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r2111 | gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.left(), gridRect.bottom()); | ||
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r2133 | gridLine->setVisible(true); | ||
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r2111 | } | ||
| } | ||||
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r2138 | QSizeF HorizontalAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
| { | ||||
| Q_UNUSED(constraint); | ||||
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r2139 | QFontMetrics fn(titleFont()); | ||
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r2306 | QSizeF sh(0,0); | ||
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r2138 | |||
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r2297 | if (titleText().isNull() || !titleItem()->isVisible()) | ||
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r2138 | return sh; | ||
| switch (which) { | ||||
| case Qt::MinimumSize: | ||||
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r2413 | sh = QSizeF(fn.boundingRect("...").width(), fn.height() + (titlePadding() * 2)); | ||
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r2138 | break; | ||
| case Qt::MaximumSize: | ||||
| case Qt::PreferredSize: | ||||
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r2413 | sh = QSizeF(fn.boundingRect(axis()->titleText()).width(), fn.height() + (titlePadding() * 2)); | ||
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r2138 | break; | ||
| default: | ||||
| break; | ||||
| } | ||||
| return sh; | ||||
| } | ||||
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r2111 | QTCOMMERCIALCHART_END_NAMESPACE | ||