callout.cpp
117 lines
| 4.1 KiB
| text/x-c
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CppLexer
Miikka Heikkinen
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r2435 | /**************************************************************************** | ||
| ** | ||||
Titta Heikkala
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
|
Miikka Heikkinen
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r2435 | ** All rights reserved. | ||
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Titta Heikkala
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
|
Miikka Heikkinen
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r2435 | ** | ||
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Titta Heikkala
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r2740 | ** This file is part of the Qt Charts module. | ||
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Miikka Heikkinen
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r2435 | ** | ||
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Titta Heikkala
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
|
Titta Heikkala
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r2776 | ** agreement between you and The Qt Company. | ||
|
Miikka Heikkinen
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r2435 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
|
Titta Heikkala
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r2740 | ** contact form at http://qt.io | ||
|
Miikka Heikkinen
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r2435 | ** | ||
| ****************************************************************************/ | ||||
Marek Rosa
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r2150 | #include "callout.h" | ||
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r2714 | #include <QtGui/QPainter> | ||
| #include <QtGui/QFontMetrics> | ||||
| #include <QtWidgets/QGraphicsSceneMouseEvent> | ||||
| #include <QtGui/QMouseEvent> | ||||
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r2150 | |||
| Callout::Callout(QGraphicsItem * parent): | ||||
| QGraphicsItem(parent) | ||||
| { | ||||
| } | ||||
| QRectF Callout::boundingRect() const | ||||
| { | ||||
| QPointF anchor = mapFromParent(m_anchor); | ||||
| QRectF rect; | ||||
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r2378 | rect.setLeft(qMin(m_rect.left(), anchor.x())); | ||
| rect.setRight(qMax(m_rect.right(), anchor.x())); | ||||
| rect.setTop(qMin(m_rect.top(), anchor.y())); | ||||
| rect.setBottom(qMax(m_rect.bottom(), anchor.y())); | ||||
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r2150 | return rect; | ||
| } | ||||
| void Callout::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||||
| { | ||||
| Q_UNUSED(option) | ||||
| Q_UNUSED(widget) | ||||
| QPainterPath path; | ||||
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Marek Rosa
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r2378 | path.addRoundedRect(m_rect, 5, 5); | ||
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r2150 | |||
| QPointF anchor = mapFromParent(m_anchor); | ||||
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r2378 | if (!m_rect.contains(anchor)) { | ||
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r2150 | QPointF point1, point2; | ||
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r2393 | // establish the position of the anchor point in relation to m_rect | ||
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r2378 | bool above = anchor.y() <= m_rect.top(); | ||
| bool aboveCenter = anchor.y() > m_rect.top() && anchor.y() <= m_rect.center().y(); | ||||
| bool belowCenter = anchor.y() > m_rect.center().y() && anchor.y() <= m_rect.bottom(); | ||||
| bool below = anchor.y() > m_rect.bottom(); | ||||
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r2150 | |||
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r2378 | bool onLeft = anchor.x() <= m_rect.left(); | ||
| bool leftOfCenter = anchor.x() > m_rect.left() && anchor.x() <= m_rect.center().x(); | ||||
| bool rightOfCenter = anchor.x() > m_rect.center().x() && anchor.x() <= m_rect.right(); | ||||
| bool onRight = anchor.x() > m_rect.right(); | ||||
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r2150 | |||
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r2393 | // get the nearest m_rect corner. | ||
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r2378 | qreal x = (onRight + rightOfCenter) * m_rect.width(); | ||
| qreal y = (below + belowCenter) * m_rect.height(); | ||||
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r2150 | bool cornerCase = (above && onLeft) || (above && onRight) || (below && onLeft) || (below && onRight); | ||
| bool vertical = qAbs(anchor.x() - x) > qAbs(anchor.y() - y); | ||||
| qreal x1 = x + leftOfCenter * 10 - rightOfCenter * 20 + cornerCase * !vertical * (onLeft * 10 - onRight * 20); | ||||
| qreal y1 = y + aboveCenter * 10 - belowCenter * 20 + cornerCase * vertical * (above * 10 - below * 20);; | ||||
| point1.setX(x1); | ||||
| point1.setY(y1); | ||||
| qreal x2 = x + leftOfCenter * 20 - rightOfCenter * 10 + cornerCase * !vertical * (onLeft * 20 - onRight * 10);; | ||||
| qreal y2 = y + aboveCenter * 20 - belowCenter * 10 + cornerCase * vertical * (above * 20 - below * 10);; | ||||
| point2.setX(x2); | ||||
| point2.setY(y2); | ||||
| path.moveTo(point1); | ||||
| path.lineTo(mapFromParent(m_anchor)); | ||||
| path.lineTo(point2); | ||||
| path = path.simplified(); | ||||
| } | ||||
| painter->setBrush(QColor(255, 255, 255)); | ||||
| painter->drawPath(path); | ||||
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r2378 | painter->drawText(m_textRect, m_text); | ||
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r2150 | } | ||
| void Callout::mousePressEvent(QGraphicsSceneMouseEvent *event) | ||||
| { | ||||
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r2379 | event->setAccepted(true); | ||
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r2150 | } | ||
| void Callout::mouseMoveEvent(QGraphicsSceneMouseEvent *event) | ||||
| { | ||||
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r2378 | if (event->buttons() & Qt::LeftButton){ | ||
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r2379 | setPos(mapToParent(event->pos() - event->buttonDownPos(Qt::LeftButton))); | ||
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r2150 | event->setAccepted(true); | ||
| } else { | ||||
| event->setAccepted(false); | ||||
| } | ||||
| } | ||||
| void Callout::setText(const QString &text) | ||||
| { | ||||
| m_text = text; | ||||
| QFontMetrics metrics(m_font); | ||||
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r2378 | m_textRect = metrics.boundingRect(QRect(0, 0, 150, 150), Qt::AlignLeft, m_text); | ||
| m_textRect.translate(5, 5); | ||||
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r2379 | prepareGeometryChange(); | ||
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r2378 | m_rect = m_textRect.adjusted(-5, -5, 5, 5); | ||
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r2150 | } | ||
| void Callout::setAnchor(QPointF point) | ||||
| { | ||||
| m_anchor = point; | ||||
| } | ||||