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1 | /**************************************************************************** |
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1 | /**************************************************************************** | |
2 | ** |
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2 | ** | |
3 | ** Copyright (C) 2012 Digia Plc |
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3 | ** Copyright (C) 2012 Digia Plc | |
4 | ** All rights reserved. |
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4 | ** All rights reserved. | |
5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
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5 | ** For any questions to Digia, please use contact form at http://qt.digia.com | |
6 | ** |
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6 | ** | |
7 | ** This file is part of the Qt Commercial Charts Add-on. |
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7 | ** This file is part of the Qt Commercial Charts Add-on. | |
8 | ** |
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8 | ** | |
9 | ** $QT_BEGIN_LICENSE$ |
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9 | ** $QT_BEGIN_LICENSE$ | |
10 | ** Licensees holding valid Qt Commercial licenses may use this file in |
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10 | ** Licensees holding valid Qt Commercial licenses may use this file in | |
11 | ** accordance with the Qt Commercial License Agreement provided with the |
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11 | ** accordance with the Qt Commercial License Agreement provided with the | |
12 | ** Software or, alternatively, in accordance with the terms contained in |
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12 | ** Software or, alternatively, in accordance with the terms contained in | |
13 | ** a written agreement between you and Digia. |
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13 | ** a written agreement between you and Digia. | |
14 | ** |
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14 | ** | |
15 | ** If you have questions regarding the use of this file, please use |
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15 | ** If you have questions regarding the use of this file, please use | |
16 | ** contact form at http://qt.digia.com |
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16 | ** contact form at http://qt.digia.com | |
17 | ** $QT_END_LICENSE$ |
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17 | ** $QT_END_LICENSE$ | |
18 | ** |
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18 | ** | |
19 | ****************************************************************************/ |
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19 | ****************************************************************************/ | |
20 |
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20 | |||
21 | #include "linechartitem_p.h" |
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21 | #include "linechartitem_p.h" | |
22 | #include "qlineseries.h" |
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22 | #include "qlineseries.h" | |
23 | #include "qlineseries_p.h" |
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23 | #include "qlineseries_p.h" | |
24 | #include "chartpresenter_p.h" |
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24 | #include "chartpresenter_p.h" | |
25 | #include <QPainter> |
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25 | #include <QPainter> | |
26 | #include <QGraphicsSceneMouseEvent> |
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26 | #include <QGraphicsSceneMouseEvent> | |
27 |
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27 | |||
28 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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28 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | |
29 |
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29 | |||
30 | const qreal mouseEventMinWidth(12); |
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30 | const qreal mouseEventMinWidth(12); | |
31 |
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31 | |||
32 | LineChartItem::LineChartItem(QLineSeries *series, ChartPresenter *presenter) |
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32 | LineChartItem::LineChartItem(QLineSeries *series, ChartPresenter *presenter) | |
33 | : XYChart(series, presenter), |
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33 | : XYChart(series, presenter), | |
34 | QGraphicsItem(presenter ? presenter->rootItem() : 0), |
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34 | QGraphicsItem(presenter ? presenter->rootItem() : 0), | |
35 | m_series(series), |
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35 | m_series(series), | |
36 | m_pointsVisible(false) |
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36 | m_pointsVisible(false) | |
37 | { |
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37 | { | |
38 | setAcceptHoverEvents(true); |
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38 | setAcceptHoverEvents(true); | |
39 | setZValue(ChartPresenter::LineChartZValue); |
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39 | setZValue(ChartPresenter::LineChartZValue); | |
40 | QObject::connect(series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated())); |
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40 | QObject::connect(series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated())); | |
41 | QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated())); |
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41 | QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated())); | |
42 | QObject::connect(series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated())); |
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42 | QObject::connect(series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated())); | |
43 | handleUpdated(); |
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43 | handleUpdated(); | |
44 | } |
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44 | } | |
45 |
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45 | |||
46 | QRectF LineChartItem::boundingRect() const |
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46 | QRectF LineChartItem::boundingRect() const | |
47 | { |
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47 | { | |
48 | return m_rect; |
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48 | return m_rect; | |
49 | } |
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49 | } | |
50 |
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50 | |||
51 | QPainterPath LineChartItem::shape() const |
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51 | QPainterPath LineChartItem::shape() const | |
52 | { |
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52 | { | |
53 | return m_path; |
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53 | return m_path; | |
54 | } |
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54 | } | |
55 |
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55 | |||
56 | void LineChartItem::updateGeometry() |
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56 | void LineChartItem::updateGeometry() | |
57 | { |
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57 | { | |
58 | m_points = geometryPoints(); |
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58 | m_points = geometryPoints(); | |
59 |
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59 | |||
60 | if (m_points.size() == 0) { |
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60 | if (m_points.size() == 0) { | |
61 | prepareGeometryChange(); |
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61 | prepareGeometryChange(); | |
62 | m_path = QPainterPath(); |
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62 | m_path = QPainterPath(); | |
63 | m_rect = QRect(); |
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63 | m_rect = QRect(); | |
64 | return; |
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64 | return; | |
65 | } |
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65 | } | |
66 |
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66 | |||
67 | QPainterPath linePath(m_points.at(0)); |
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67 | QPainterPath linePath(m_points.at(0)); | |
68 |
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68 | |||
69 | if (m_pointsVisible) { |
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69 | if (m_pointsVisible) { | |
70 |
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70 | |||
71 | int size = m_linePen.width(); |
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71 | int size = m_linePen.width(); | |
72 | linePath.addEllipse(m_points.at(0), size, size); |
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72 | linePath.addEllipse(m_points.at(0), size, size); | |
73 | for (int i = 1; i < m_points.size(); i++) { |
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73 | for (int i = 1; i < m_points.size(); i++) { | |
74 | linePath.lineTo(m_points.at(i)); |
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74 | linePath.lineTo(m_points.at(i)); | |
75 | linePath.addEllipse(m_points.at(i), size, size); |
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75 | linePath.addEllipse(m_points.at(i), size, size); | |
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76 | linePath.moveTo(m_points.at(i)); | |||
76 | } |
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77 | } | |
77 |
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78 | |||
78 | } else { |
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79 | } else { | |
79 | for (int i = 1; i < m_points.size(); i++) |
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80 | for (int i = 1; i < m_points.size(); i++) | |
80 | linePath.lineTo(m_points.at(i)); |
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81 | linePath.lineTo(m_points.at(i)); | |
81 | } |
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82 | } | |
82 |
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83 | |||
83 | m_linePath = linePath; |
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84 | m_linePath = linePath; | |
84 |
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85 | |||
85 | QPainterPathStroker stroker; |
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86 | QPainterPathStroker stroker; | |
86 | // QPainter::drawLine does not respect join styles, for example BevelJoin becomes MiterJoin. |
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87 | // QPainter::drawLine does not respect join styles, for example BevelJoin becomes MiterJoin. | |
87 | // This is why we are prepared for the "worst case" scenario, i.e. use always MiterJoin and |
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88 | // This is why we are prepared for the "worst case" scenario, i.e. use always MiterJoin and | |
88 | // multiply line width with square root of two when defining shape and bounding rectangle. |
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89 | // multiply line width with square root of two when defining shape and bounding rectangle. | |
89 | stroker.setWidth(m_linePen.width() * 1.42); |
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90 | stroker.setWidth(m_linePen.width() * 1.42); | |
90 | stroker.setJoinStyle(Qt::MiterJoin); |
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91 | stroker.setJoinStyle(Qt::MiterJoin); | |
91 | stroker.setCapStyle(Qt::SquareCap); |
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92 | stroker.setCapStyle(Qt::SquareCap); | |
92 | stroker.setMiterLimit(m_linePen.miterLimit()); |
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93 | stroker.setMiterLimit(m_linePen.miterLimit()); | |
93 |
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94 | |||
94 | prepareGeometryChange(); |
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95 | prepareGeometryChange(); | |
95 |
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96 | |||
96 | m_path = stroker.createStroke(linePath); |
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97 | m_path = stroker.createStroke(linePath); | |
97 | m_rect = m_path.boundingRect(); |
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98 | m_rect = m_path.boundingRect(); | |
98 |
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99 | |||
99 | setPos(origin()); |
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100 | setPos(origin()); | |
100 | } |
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101 | } | |
101 |
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102 | |||
102 | void LineChartItem::handleUpdated() |
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103 | void LineChartItem::handleUpdated() | |
103 | { |
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104 | { | |
104 | setVisible(m_series->isVisible()); |
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105 | setVisible(m_series->isVisible()); | |
105 | setOpacity(m_series->opacity()); |
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106 | setOpacity(m_series->opacity()); | |
106 | m_pointsVisible = m_series->pointsVisible(); |
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107 | m_pointsVisible = m_series->pointsVisible(); | |
107 | m_linePen = m_series->pen(); |
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108 | m_linePen = m_series->pen(); | |
108 | update(); |
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109 | update(); | |
109 | } |
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110 | } | |
110 |
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111 | |||
111 | void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) |
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112 | void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | |
112 | { |
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113 | { | |
113 | Q_UNUSED(widget) |
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114 | Q_UNUSED(widget) | |
114 | Q_UNUSED(option) |
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115 | Q_UNUSED(option) | |
115 |
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116 | |||
116 | painter->save(); |
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117 | painter->save(); | |
117 | painter->setPen(m_linePen); |
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118 | painter->setPen(m_linePen); | |
118 | painter->setBrush(m_linePen.color()); |
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119 | painter->setBrush(m_linePen.color()); | |
119 | painter->setClipRect(clipRect()); |
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120 | painter->setClipRect(clipRect()); | |
120 |
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121 | |||
121 | if (m_pointsVisible) { |
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122 | if (m_pointsVisible) { | |
122 | painter->drawPath(m_linePath); |
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123 | painter->drawPath(m_linePath); | |
123 | } else { |
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124 | } else { | |
124 | for (int i(1); i < m_points.size(); i++) |
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125 | for (int i(1); i < m_points.size(); i++) | |
125 | painter->drawLine(m_points.at(i - 1), m_points.at(i)); |
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126 | painter->drawLine(m_points.at(i - 1), m_points.at(i)); | |
126 | } |
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127 | } | |
127 | painter->restore(); |
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128 | painter->restore(); | |
128 | } |
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129 | } | |
129 |
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130 | |||
130 | void LineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event) |
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131 | void LineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event) | |
131 | { |
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132 | { | |
132 | emit XYChart::clicked(calculateDomainPoint(event->pos())); |
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133 | emit XYChart::clicked(calculateDomainPoint(event->pos())); | |
133 | QGraphicsItem::mousePressEvent(event); |
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134 | QGraphicsItem::mousePressEvent(event); | |
134 | } |
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135 | } | |
135 |
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136 | |||
136 | void LineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) |
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137 | void LineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) | |
137 | { |
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138 | { | |
138 | emit XYChart::hovered(calculateDomainPoint(event->pos()), true); |
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139 | emit XYChart::hovered(calculateDomainPoint(event->pos()), true); | |
139 | event->accept(); |
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140 | event->accept(); | |
140 | // QGraphicsItem::hoverEnterEvent(event); |
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141 | // QGraphicsItem::hoverEnterEvent(event); | |
141 | } |
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142 | } | |
142 |
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143 | |||
143 | void LineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) |
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144 | void LineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) | |
144 | { |
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145 | { | |
145 | emit XYChart::hovered(calculateDomainPoint(event->pos()), false); |
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146 | emit XYChart::hovered(calculateDomainPoint(event->pos()), false); | |
146 | event->accept(); |
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147 | event->accept(); | |
147 | // QGraphicsItem::hoverEnterEvent(event); |
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148 | // QGraphicsItem::hoverEnterEvent(event); | |
148 | } |
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149 | } | |
149 |
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150 | |||
150 | #include "moc_linechartitem_p.cpp" |
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151 | #include "moc_linechartitem_p.cpp" | |
151 |
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152 | |||
152 | QTCOMMERCIALCHART_END_NAMESPACE |
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153 | QTCOMMERCIALCHART_END_NAMESPACE |
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