chartlayout.cpp
402 lines
| 13.5 KiB
| text/x-c
|
CppLexer
/ src / chartlayout.cpp
Michal Klocek
|
r1535 | /**************************************************************************** | ||
| ** | ||||
Miikka Heikkinen
|
r2432 | ** Copyright (C) 2013 Digia Plc | ||
|
Michal Klocek
|
r1535 | ** 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
|
Michal Klocek
|
r1534 | #include "chartlayout_p.h" | ||
| #include "chartpresenter_p.h" | ||||
|
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r1837 | #include "qlegend_p.h" | ||
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r1534 | #include "chartaxis_p.h" | ||
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r1965 | #include "charttitle_p.h" | ||
| #include "chartbackground_p.h" | ||||
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r2105 | #include <QDebug> | ||
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r1535 | |||
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r1534 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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r2411 | static const qreal maxAxisPortion = 0.4; | ||
|
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r1965 | |||
Jani Honkonen
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r2131 | ChartLayout::ChartLayout(ChartPresenter *presenter) | ||
| : m_presenter(presenter), | ||||
| m_margins(20, 20, 20, 20), | ||||
| m_minChartRect(0, 0, 200, 200) | ||||
|
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r1534 | { | ||
| } | ||||
| ChartLayout::~ChartLayout() | ||||
| { | ||||
| } | ||||
|
Jani Honkonen
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r2131 | void ChartLayout::setGeometry(const QRectF &rect) | ||
|
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r1534 | { | ||
|
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r2056 | if (!rect.isValid()) | ||
| return; | ||||
|
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r1538 | |||
|
Jani Honkonen
|
r2131 | QList<ChartAxis *> axes = m_presenter->axisItems(); | ||
| ChartTitle *title = m_presenter->titleElement(); | ||||
| QLegend *legend = m_presenter->legend(); | ||||
| ChartBackground *background = m_presenter->backgroundElement(); | ||||
|
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r1534 | |||
|
Jani Honkonen
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r2131 | QRectF contentGeometry = calculateBackgroundGeometry(rect, background); | ||
|
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r1534 | |||
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r1965 | contentGeometry = calculateContentGeometry(contentGeometry); | ||
|
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r1837 | |||
|
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r2131 | if (title && title->isVisible()) | ||
| contentGeometry = calculateTitleGeometry(contentGeometry, title); | ||||
|
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r1534 | |||
|
Jani Honkonen
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r2131 | if (legend->isAttachedToChart() && legend->isVisible()) | ||
| contentGeometry = calculateLegendGeometry(contentGeometry, legend); | ||||
|
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r1534 | |||
|
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r2131 | contentGeometry = calculateAxisGeometry(contentGeometry, axes); | ||
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r1965 | |||
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r2273 | m_presenter->setGeometry(contentGeometry); | ||
|
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r1965 | |||
| QGraphicsLayout::setGeometry(rect); | ||||
| } | ||||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateContentGeometry(const QRectF &geometry) const | ||
|
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r1965 | { | ||
|
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r2131 | return geometry.adjusted(m_margins.left(), m_margins.top(), -m_margins.right(), -m_margins.bottom()); | ||
|
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r1965 | } | ||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateContentMinimum(const QRectF &minimum) const | ||
|
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r1965 | { | ||
|
Jani Honkonen
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r2131 | return minimum.adjusted(0, 0, m_margins.left() + m_margins.right(), m_margins.top() + m_margins.bottom()); | ||
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r1965 | } | ||
|
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r1534 | |||
|
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r1965 | |||
|
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r2131 | QRectF ChartLayout::calculateBackgroundGeometry(const QRectF &geometry, ChartBackground *background) const | ||
|
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r1965 | { | ||
| qreal left, top, right, bottom; | ||||
| getContentsMargins(&left, &top, &right, &bottom); | ||||
|
Jani Honkonen
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r2131 | QRectF backgroundGeometry = geometry.adjusted(left, top, -right, -bottom); | ||
| if (background) | ||||
| background->setRect(backgroundGeometry); | ||||
|
Michal Klocek
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r1965 | return backgroundGeometry; | ||
| } | ||||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateBackgroundMinimum(const QRectF &minimum) const | ||
|
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r1965 | { | ||
| qreal left, top, right, bottom; | ||||
| getContentsMargins(&left, &top, &right, &bottom); | ||||
|
Jani Honkonen
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r2131 | return minimum.adjusted(0, 0, left + right, top + bottom); | ||
|
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r1965 | } | ||
|
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r2105 | |||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateAxisGeometry(const QRectF &geometry, const QList<ChartAxis *>& axes) const | ||
|
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r1965 | { | ||
|
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r2133 | QSizeF left(0,0); | ||
| QSizeF minLeft(0,0); | ||||
| QSizeF right(0,0); | ||||
| QSizeF minRight(0,0); | ||||
| QSizeF bottom(0,0); | ||||
| QSizeF minBottom(0,0); | ||||
| QSizeF top(0,0); | ||||
| QSizeF minTop(0,0); | ||||
|
Miikka Heikkinen
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r2443 | QSizeF labelExtents(0,0); | ||
|
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r2105 | int leftCount = 0; | ||
| int rightCount = 0; | ||||
| int topCount = 0; | ||||
| int bottomCount = 0; | ||||
|
Jani Honkonen
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r2131 | foreach (ChartAxis *axis , axes) { | ||
|
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r2105 | |||
|
Jani Honkonen
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r2131 | if (!axis->isVisible()) | ||
| continue; | ||||
|
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r2105 | |||
|
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r2133 | QSizeF size = axis->effectiveSizeHint(Qt::PreferredSize); | ||
| //this is used to get single thick font size | ||||
| QSizeF minSize = axis->effectiveSizeHint(Qt::MinimumSize); | ||||
|
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r2105 | |||
|
Jani Honkonen
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r2131 | switch (axis->alignment()) { | ||
|
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r2105 | case Qt::AlignLeft: | ||
|
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r2133 | left.setWidth(left.width()+size.width()); | ||
| left.setHeight(qMax(left.height(),size.height())); | ||||
| minLeft.setWidth(minLeft.width()+minSize.width()); | ||||
| minLeft.setHeight(qMax(minLeft.height(),minSize.height())); | ||||
|
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r2443 | labelExtents.setHeight(qMax(size.height(), labelExtents.height())); | ||
|
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r2133 | leftCount++; | ||
| break; | ||||
|
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r2105 | case Qt::AlignRight: | ||
|
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r2133 | right.setWidth(right.width()+size.width()); | ||
| right.setHeight(qMax(right.height(),size.height())); | ||||
| minRight.setWidth(minRight.width()+minSize.width()); | ||||
| minRight.setHeight(qMax(minRight.height(),minSize.height())); | ||||
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r2443 | labelExtents.setHeight(qMax(size.height(), labelExtents.height())); | ||
|
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r2105 | rightCount++; | ||
| break; | ||||
| case Qt::AlignTop: | ||||
|
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r2133 | top.setWidth(qMax(top.width(),size.width())); | ||
| top.setHeight(top.height()+size.height()); | ||||
| minTop.setWidth(qMax(minTop.width(),minSize.width())); | ||||
| minTop.setHeight(minTop.height()+minSize.height()); | ||||
|
Miikka Heikkinen
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r2443 | labelExtents.setWidth(qMax(size.width(), labelExtents.width())); | ||
|
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r2105 | topCount++; | ||
| break; | ||||
| case Qt::AlignBottom: | ||||
|
Jani Honkonen
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r2131 | bottom.setWidth(qMax(bottom.width(), size.width())); | ||
|
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r2105 | bottom.setHeight(bottom.height() + size.height()); | ||
|
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r2133 | minBottom.setWidth(qMax(minBottom.width(),minSize.width())); | ||
| minBottom.setHeight(minBottom.height() + minSize.height()); | ||||
|
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r2443 | labelExtents.setWidth(qMax(size.width(), labelExtents.width())); | ||
|
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r2105 | bottomCount++; | ||
| break; | ||||
|
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r2273 | default: | ||
| qWarning()<<"Axis is without alignment !"; | ||||
| break; | ||||
|
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r1965 | } | ||
|
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r1534 | } | ||
|
Miikka Heikkinen
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r2411 | int totalVerticalAxes = leftCount + rightCount; | ||
| qreal leftSqueezeRatio = 1.0; | ||||
| qreal rightSqueezeRatio = 1.0; | ||||
| qreal vratio = 0; | ||||
|
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r2133 | |||
|
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r2411 | if (totalVerticalAxes > 0) | ||
| vratio = (maxAxisPortion * geometry.width()) / totalVerticalAxes; | ||||
| if (leftCount > 0) { | ||||
| int maxWidth = vratio * leftCount; | ||||
| if (left.width() > maxWidth) { | ||||
| leftSqueezeRatio = maxWidth / left.width(); | ||||
| left.setWidth(maxWidth); | ||||
| } | ||||
| } | ||||
| if (rightCount > 0) { | ||||
| int maxWidth = vratio * rightCount; | ||||
| if (right.width() > maxWidth) { | ||||
| rightSqueezeRatio = maxWidth / right.width(); | ||||
| right.setWidth(maxWidth); | ||||
| } | ||||
| } | ||||
| int totalHorizontalAxes = topCount + bottomCount; | ||||
| qreal topSqueezeRatio = 1.0; | ||||
| qreal bottomSqueezeRatio = 1.0; | ||||
| qreal hratio = 0; | ||||
| if (totalHorizontalAxes > 0) | ||||
| hratio = (maxAxisPortion * geometry.height()) / totalHorizontalAxes; | ||||
| if (topCount > 0) { | ||||
| int maxHeight = hratio * topCount; | ||||
| if (top.height() > maxHeight) { | ||||
| topSqueezeRatio = maxHeight / top.height(); | ||||
| top.setHeight(maxHeight); | ||||
| } | ||||
| } | ||||
| if (bottomCount > 0) { | ||||
| int maxHeight = hratio * bottomCount; | ||||
| if (bottom.height() > maxHeight) { | ||||
| bottomSqueezeRatio = maxHeight / bottom.height(); | ||||
| bottom.setHeight(maxHeight); | ||||
| } | ||||
| } | ||||
|
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r2105 | |||
|
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r2354 | qreal minHeight = qMax(minLeft.height(),minRight.height()) + 1; | ||
| qreal minWidth = qMax(minTop.width(),minBottom.width()) + 1; | ||||
|
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r2133 | |||
|
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r2443 | // Ensure that there is enough space for first and last tick labels. | ||
| left.setWidth(qMax(labelExtents.width(), left.width())); | ||||
| right.setWidth(qMax(labelExtents.width(), right.width())); | ||||
| top.setHeight(qMax(labelExtents.height(), top.height())); | ||||
| bottom.setHeight(qMax(labelExtents.height(), bottom.height())); | ||||
|
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r2133 | QRectF chartRect = geometry.adjusted(qMax(left.width(),minWidth/2), qMax(top.height(), minHeight/2),-qMax(right.width(),minWidth/2),-qMax(bottom.height(),minHeight/2)); | ||
|
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r2105 | |||
|
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r2131 | qreal leftOffset = 0; | ||
| qreal rightOffset = 0; | ||||
| qreal topOffset = 0; | ||||
| qreal bottomOffset = 0; | ||||
|
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r2105 | |||
|
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r2273 | foreach(ChartElement *axisElement , axes) { | ||
| ChartAxis* axis = qobject_cast<ChartAxis*>(axisElement); | ||||
|
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r2105 | |||
|
Jani Honkonen
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r2131 | if (!axis->isVisible()) | ||
| continue; | ||||
|
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r2105 | |||
|
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r2133 | QSizeF size = axis->effectiveSizeHint(Qt::PreferredSize); | ||
|
Michal Klocek
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r2105 | |||
|
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r2133 | switch(axis->alignment()){ | ||
| case Qt::AlignLeft:{ | ||||
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Miikka Heikkinen
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r2411 | qreal width = size.width(); | ||
| if (leftSqueezeRatio < 1.0) | ||||
| width *= leftSqueezeRatio; | ||||
|
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r2133 | leftOffset+=width; | ||
| axis->setGeometry(QRect(chartRect.left()-leftOffset, geometry.top(),width, geometry.bottom()),chartRect); | ||||
|
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r2105 | break; | ||
| } | ||||
|
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r2133 | case Qt::AlignRight:{ | ||
|
Miikka Heikkinen
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r2411 | qreal width = size.width(); | ||
| if (rightSqueezeRatio < 1.0) | ||||
| width *= rightSqueezeRatio; | ||||
|
Michal Klocek
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r2133 | axis->setGeometry(QRect(chartRect.right()+rightOffset,geometry.top(),width,geometry.bottom()),chartRect); | ||
| rightOffset+=width; | ||||
|
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r2105 | break; | ||
| } | ||||
|
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r2411 | case Qt::AlignTop: { | ||
| qreal height = size.height(); | ||||
| if (topSqueezeRatio < 1.0) | ||||
| height *= topSqueezeRatio; | ||||
| axis->setGeometry(QRect(geometry.left(), chartRect.top() - topOffset - height, geometry.width(), height), chartRect); | ||||
| topOffset += height; | ||||
|
Michal Klocek
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r2105 | break; | ||
|
Miikka Heikkinen
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r2411 | } | ||
|
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r2105 | case Qt::AlignBottom: | ||
|
Miikka Heikkinen
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r2411 | qreal height = size.height(); | ||
| if (bottomSqueezeRatio < 1.0) | ||||
| height *= bottomSqueezeRatio; | ||||
| axis->setGeometry(QRect(geometry.left(), chartRect.bottom() + bottomOffset, geometry.width(), height), chartRect); | ||||
| bottomOffset += height; | ||||
|
Michal Klocek
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r2105 | break; | ||
Marek Rosa
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r2093 | } | ||
|
Michal Klocek
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r1965 | } | ||
|
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r1883 | |||
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Michal Klocek
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r2105 | return chartRect; | ||
|
Michal Klocek
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r1965 | } | ||
|
Michal Klocek
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r1534 | |||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateAxisMinimum(const QRectF &minimum, const QList<ChartAxis *>& axes) const | ||
|
Michal Klocek
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r1965 | { | ||
|
Michal Klocek
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r2105 | QSizeF left; | ||
| QSizeF right; | ||||
| QSizeF bottom; | ||||
| QSizeF top; | ||||
|
Michal Klocek
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r2273 | foreach (ChartAxis *axis, axes) { | ||
|
Michal Klocek
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r2105 | |||
| QSizeF size = axis->effectiveSizeHint(Qt::MinimumSize); | ||||
|
Jani Honkonen
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r2131 | if (!axis->isVisible()) | ||
| continue; | ||||
|
Michal Klocek
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r2105 | |||
|
Jani Honkonen
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r2131 | switch (axis->alignment()) { | ||
| case Qt::AlignLeft: | ||||
| left.setWidth(left.width() + size.width()); | ||||
| left.setHeight(qMax(left.height() * 2, size.height())); | ||||
|
Michal Klocek
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r2105 | break; | ||
|
Jani Honkonen
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r2131 | case Qt::AlignRight: | ||
| right.setWidth(right.width() + size.width()); | ||||
| right.setHeight(qMax(right.height() * 2, size.height())); | ||||
|
Michal Klocek
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r2105 | break; | ||
|
Jani Honkonen
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r2131 | case Qt::AlignTop: | ||
| top.setWidth(qMax(top.width(), size.width())); | ||||
| top.setHeight(top.height() + size.height()); | ||||
|
Michal Klocek
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r2105 | break; | ||
|
Jani Honkonen
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r2131 | case Qt::AlignBottom: | ||
| bottom.setWidth(qMax(bottom.width(), size.width())); | ||||
|
Michal Klocek
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r2105 | bottom.setHeight(bottom.height() + size.height()); | ||
| break; | ||||
| } | ||||
|
Michal Klocek
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r1965 | } | ||
|
Jani Honkonen
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r2131 | return minimum.adjusted(0, 0, left.width() + right.width() + qMax(top.width(), bottom.width()), top.height() + bottom.height() + qMax(left.height(), right.height())); | ||
|
Michal Klocek
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r1965 | } | ||
|
Michal Klocek
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r1534 | |||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateLegendGeometry(const QRectF &geometry, QLegend *legend) const | ||
|
Michal Klocek
|
r1965 | { | ||
|
Jani Honkonen
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r2131 | QSizeF size = legend->effectiveSizeHint(Qt::PreferredSize, QSizeF(-1, -1)); | ||
|
Michal Klocek
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r1965 | QRectF legendRect; | ||
| QRectF result; | ||||
|
Michal Klocek
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r1883 | |||
|
Michal Klocek
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r1965 | switch (legend->alignment()) { | ||
|
Michal Klocek
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r2105 | case Qt::AlignTop: { | ||
|
Jani Honkonen
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r2131 | legendRect = QRectF(geometry.topLeft(), QSizeF(geometry.width(), size.height())); | ||
| result = geometry.adjusted(0, legendRect.height(), 0, 0); | ||||
|
Marek Rosa
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r2093 | break; | ||
|
Michal Klocek
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r2105 | } | ||
| case Qt::AlignBottom: { | ||||
|
Jani Honkonen
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r2131 | legendRect = QRectF(QPointF(geometry.left(), geometry.bottom() - size.height()), QSizeF(geometry.width(), size.height())); | ||
| result = geometry.adjusted(0, 0, 0, -legendRect.height()); | ||||
|
Marek Rosa
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r2093 | break; | ||
|
Michal Klocek
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r2105 | } | ||
|
Marek Rosa
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r2093 | case Qt::AlignLeft: { | ||
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Miikka Heikkinen
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r2411 | qreal width = qMin(size.width(), geometry.width() * maxAxisPortion); | ||
|
Jani Honkonen
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r2131 | legendRect = QRectF(geometry.topLeft(), QSizeF(width, geometry.height())); | ||
| result = geometry.adjusted(width, 0, 0, 0); | ||||
|
Marek Rosa
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r2093 | break; | ||
| } | ||||
| case Qt::AlignRight: { | ||||
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Miikka Heikkinen
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r2411 | qreal width = qMin(size.width(), geometry.width() * maxAxisPortion); | ||
|
Jani Honkonen
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r2131 | legendRect = QRectF(QPointF(geometry.right() - width, geometry.top()), QSizeF(width, geometry.height())); | ||
| result = geometry.adjusted(0, 0, -width, 0); | ||||
|
Marek Rosa
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r2093 | break; | ||
| } | ||||
|
Michal Klocek
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r2105 | default: { | ||
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Jani Honkonen
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r2131 | legendRect = QRectF(0, 0, 0, 0); | ||
|
Marek Rosa
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r2093 | result = geometry; | ||
| break; | ||||
| } | ||||
|
Michal Klocek
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r2105 | } | ||
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Michal Klocek
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r1534 | |||
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Michal Klocek
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r1965 | legend->setGeometry(legendRect); | ||
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Michal Klocek
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r1534 | |||
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Michal Klocek
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r1965 | return result; | ||
| } | ||||
|
Michal Klocek
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r1534 | |||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateLegendMinimum(const QRectF &geometry, QLegend *legend) const | ||
|
Michal Klocek
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r2105 | { | ||
|
Jani Honkonen
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r2131 | QSizeF minSize = legend->effectiveSizeHint(Qt::MinimumSize, QSizeF(-1, -1)); | ||
| return geometry.adjusted(0, 0, minSize.width(), minSize.height()); | ||||
|
Michal Klocek
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r2105 | } | ||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateTitleGeometry(const QRectF &geometry, ChartTitle *title) const | ||
|
Michal Klocek
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r1965 | { | ||
|
Marek Rosa
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r2093 | title->setGeometry(geometry); | ||
| QPointF center = geometry.center() - title->boundingRect().center(); | ||||
|
Michal Klocek
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r2133 | title->setPos(center.x(),title->pos().y()); | ||
| return geometry.adjusted(0,title->boundingRect().height()+1,0,0); | ||||
|
Michal Klocek
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r1534 | } | ||
|
Jani Honkonen
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r2131 | QRectF ChartLayout::calculateTitleMinimum(const QRectF &minimum, ChartTitle *title) const | ||
|
Michal Klocek
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r1965 | { | ||
|
Marek Rosa
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r2093 | QSizeF min = title->sizeHint(Qt::MinimumSize); | ||
|
Jani Honkonen
|
r2131 | return minimum.adjusted(0, 0, min.width(), min.height()); | ||
|
Michal Klocek
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r1965 | } | ||
|
Michal Klocek
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r1534 | |||
|
Jani Honkonen
|
r2131 | QSizeF ChartLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const | ||
|
Michal Klocek
|
r1534 | { | ||
| Q_UNUSED(constraint); | ||||
|
Jani Honkonen
|
r2131 | if (which == Qt::MinimumSize) { | ||
| QList<ChartAxis *> axes = m_presenter->axisItems(); | ||||
| ChartTitle *title = m_presenter->titleElement(); | ||||
| QLegend *legend = m_presenter->legend(); | ||||
| QRectF minimumRect(0, 0, 0, 0); | ||||
|
Michal Klocek
|
r1965 | minimumRect = calculateBackgroundMinimum(minimumRect); | ||
| minimumRect = calculateContentMinimum(minimumRect); | ||||
|
Jani Honkonen
|
r2131 | minimumRect = calculateTitleMinimum(minimumRect, title); | ||
| minimumRect = calculateLegendMinimum(minimumRect, legend); | ||||
| minimumRect = calculateAxisMinimum(minimumRect, axes); | ||||
|
Michal Klocek
|
r2105 | return minimumRect.united(m_minChartRect).size().toSize(); | ||
|
Jani Honkonen
|
r2131 | } | ||
| return QSize(-1, -1); | ||||
|
Michal Klocek
|
r1534 | } | ||
|
Jani Honkonen
|
r2131 | void ChartLayout::setMargins(const QMargins &margins) | ||
|
Michal Klocek
|
r1534 | { | ||
|
Jani Honkonen
|
r2131 | if (m_margins != margins) { | ||
|
Michal Klocek
|
r1965 | m_margins = margins; | ||
|
Michal Klocek
|
r1534 | updateGeometry(); | ||
| } | ||||
| } | ||||
|
Michal Klocek
|
r1965 | QMargins ChartLayout::margins() const | ||
| { | ||||
| return m_margins; | ||||
| } | ||||
|
Michal Klocek
|
r1534 | QTCOMMERCIALCHART_END_NAMESPACE | ||