cartesianchartlayout.cpp
255 lines
| 9.1 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
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r2854 | /**************************************************************************** | ||
Michal Klocek
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r1535 | ** | ||
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Miikka Heikkinen
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r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
| ** Contact: https://www.qt.io/licensing/ | ||||
|
Michal Klocek
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r1535 | ** | ||
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Miikka Heikkinen
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r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
|
Michal Klocek
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r1535 | ** | ||
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Miikka Heikkinen
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r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
Titta Heikkala
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r2845 | ** Commercial License Usage | ||
| ** Licensees holding valid commercial Qt licenses may use this file in | ||||
| ** accordance with the commercial license agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and The Qt Company. For licensing terms | ||||
|
Miikka Heikkinen
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r2854 | ** and conditions see https://www.qt.io/terms-conditions. For further | ||
| ** information use the contact form at https://www.qt.io/contact-us. | ||||
| ** | ||||
| ** GNU General Public License Usage | ||||
| ** Alternatively, this file may be used under the terms of the GNU | ||||
| ** General Public License version 3 or (at your option) any later version | ||||
| ** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
| ** included in the packaging of this file. Please review the following | ||||
| ** information to ensure the GNU General Public License requirements will | ||||
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
|
Michal Klocek
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r1535 | ** | ||
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Titta Heikkala
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r2845 | ** $QT_END_LICENSE$ | ||
| ** | ||||
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Miikka Heikkinen
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r2854 | ****************************************************************************/ | ||
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Michal Klocek
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r1535 | |||
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Titta Heikkala
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r2714 | #include <private/cartesianchartlayout_p.h> | ||
| #include <private/chartpresenter_p.h> | ||||
| #include <private/chartaxiselement_p.h> | ||||
| #include <QtCore/QDebug> | ||||
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r1535 | |||
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r2712 | QT_CHARTS_BEGIN_NAMESPACE | ||
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r1534 | |||
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r2411 | static const qreal maxAxisPortion = 0.4; | ||
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r1965 | |||
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r2483 | CartesianChartLayout::CartesianChartLayout(ChartPresenter *presenter) | ||
| : AbstractChartLayout(presenter) | ||||
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r1534 | { | ||
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r1965 | } | ||
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r2483 | CartesianChartLayout::~CartesianChartLayout() | ||
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r1965 | { | ||
| } | ||||
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r2483 | QRectF CartesianChartLayout::calculateAxisGeometry(const QRectF &geometry, const QList<ChartAxisElement *> &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); | ||||
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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; | ||||
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r2483 | foreach (ChartAxisElement *axis , axes) { | ||
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r2105 | |||
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r2131 | if (!axis->isVisible()) | ||
| continue; | ||||
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r2105 | |||
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r2483 | |||
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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 | |||
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r2483 | switch (axis->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()); | ||||
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r2443 | labelExtents.setWidth(qMax(size.width(), labelExtents.width())); | ||
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r2105 | topCount++; | ||
| break; | ||||
| case Qt::AlignBottom: | ||||
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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 | } | ||
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r2483 | qreal totalVerticalAxes = leftCount + rightCount; | ||
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r2411 | 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); | ||||
| } | ||||
| } | ||||
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r2483 | qreal totalHorizontalAxes = topCount + bottomCount; | ||
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r2411 | 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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r2483 | foreach (ChartAxisElement *axis , axes) { | ||
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r2105 | |||
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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); | ||
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r2105 | |||
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r2483 | switch (axis->axis()->alignment()){ | ||
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r2133 | case Qt::AlignLeft:{ | ||
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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:{ | ||
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r2411 | qreal width = size.width(); | ||
| if (rightSqueezeRatio < 1.0) | ||||
| width *= rightSqueezeRatio; | ||||
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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; | ||||
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r2105 | break; | ||
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r2411 | } | ||
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r2105 | case Qt::AlignBottom: | ||
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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; | ||||
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r2105 | break; | ||
Marek Rosa
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r2093 | } | ||
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r1965 | } | ||
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r1883 | |||
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r2105 | return chartRect; | ||
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r1965 | } | ||
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r1534 | |||
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r2483 | QRectF CartesianChartLayout::calculateAxisMinimum(const QRectF &minimum, const QList<ChartAxisElement *> &axes) const | ||
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r1965 | { | ||
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r2105 | QSizeF left; | ||
| QSizeF right; | ||||
| QSizeF bottom; | ||||
| QSizeF top; | ||||
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Miikka Heikkinen
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r2483 | foreach (ChartAxisElement *axis, axes) { | ||
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r2105 | QSizeF size = axis->effectiveSizeHint(Qt::MinimumSize); | ||
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r2131 | if (!axis->isVisible()) | ||
| continue; | ||||
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r2105 | |||
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r2483 | switch (axis->axis()->alignment()) { | ||
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r2131 | case Qt::AlignLeft: | ||
| left.setWidth(left.width() + size.width()); | ||||
| left.setHeight(qMax(left.height() * 2, size.height())); | ||||
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r2105 | break; | ||
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r2131 | case Qt::AlignRight: | ||
| right.setWidth(right.width() + size.width()); | ||||
| right.setHeight(qMax(right.height() * 2, size.height())); | ||||
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r2105 | break; | ||
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r2131 | case Qt::AlignTop: | ||
| top.setWidth(qMax(top.width(), size.width())); | ||||
| top.setHeight(top.height() + size.height()); | ||||
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r2105 | break; | ||
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r2131 | case Qt::AlignBottom: | ||
| bottom.setWidth(qMax(bottom.width(), size.width())); | ||||
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r2105 | bottom.setHeight(bottom.height() + size.height()); | ||
| break; | ||||
| } | ||||
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r1965 | } | ||
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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())); | ||
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r1965 | } | ||
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r1534 | |||
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Titta Heikkala
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r2712 | QT_CHARTS_END_NAMESPACE | ||