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Clone from http://code.qt.io/qt/qtcharts.git

Integrating bar chart. Cleaned up old implementation. TODO: show this in test application. how?
sauimone -
r56:c2f871dd8e7e
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@@ -0,0 +1,46
1 #include "barchartseries.h"
2 QTCOMMERCIALCHART_BEGIN_NAMESPACE
3
4 BarChartSeries::BarChartSeries(QList<int> data, QObject *parent)
5 : QChartSeries(parent)
6 , mData(data)
7 {
8 }
9
10 int BarChartSeries::min()
11 {
12 // TODO: make min and max members and update them when data changes.
13 // This is slower since they are checked every time, even if data is same since previous call.
14 int min = mData.at(0);
15
16 for (int i=0; i <mData.count(); i++) {
17 if (mData.at(i) < min) {
18 min = mData.at(i);
19 }
20 }
21 return min;
22 }
23
24 int BarChartSeries::max()
25 {
26 int max = mData.at(0);
27
28 for (int i=0; i <mData.count(); i++) {
29 if (mData.at(i) > max) {
30 max = mData.at(i);
31 }
32 }
33 return max;
34 }
35
36 int BarChartSeries::count()
37 {
38 return mData.count();
39 }
40
41 int BarChartSeries::valueAt(int i)
42 {
43 return mData.at(i);
44 }
45
46 QTCOMMERCIALCHART_END_NAMESPACE
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@@ -0,0 +1,34
1 #ifndef BARCHARTSERIES_H
2 #define BARCHARTSERIES_H
3
4 #include <QList>
5 #include "qchartseries.h"
6 #include "qchartglobal.h"
7
8 QTCOMMERCIALCHART_BEGIN_NAMESPACE
9
10 // Container for series
11 class QTCOMMERCIALCHART_EXPORT BarChartSeries : public QChartSeries
12 {
13
14 public:
15 BarChartSeries(QList<int> data, QObject* parent=0);
16
17 // from QChartSeries
18 static QChartSeries* create(QObject* parent = 0 );
19 virtual QChartSeriesType type() const { return QChartSeries::SeriesTypeBar; }
20
21 // Methods to find out minimum and maximum values of data
22 int min();
23 int max();
24 int count();
25 int valueAt(int i);
26
27 private:
28
29 QList<int> mData;
30 };
31
32 QTCOMMERCIALCHART_END_NAMESPACE
33
34 #endif // BARCHARTSERIES_H
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@@ -0,0 +1,106
1 #include "bargroup.h"
2 #include "bar.h"
3 #include <QDebug>
4
5 QTCOMMERCIALCHART_BEGIN_NAMESPACE
6
7 BarGroup::BarGroup(BarChartSeries& series, QGraphicsItem *parent) :
8 QGraphicsItem(parent)
9 ,mSeries(series)
10 ,mLayoutSet(false)
11 ,mLayoutDirty(true)
12 {
13 dataChanged();
14 }
15
16 void BarGroup::resize( int w, int h )
17 {
18 qDebug() << "QBarChart::resize";
19 mWidth = w;
20 mHeight = h;
21 layoutChanged();
22 mLayoutSet = true;
23 }
24
25 void BarGroup::setBarWidth( int w )
26 {
27 mBarDefaultWidth = w;
28 }
29
30 void BarGroup::setColor( QColor color )
31 {
32 mColor = color;
33 }
34
35 void BarGroup::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
36 {
37 if (!mLayoutSet) {
38 qDebug() << "QBarChart::paint called without layout set. Aborting.";
39 return;
40 }
41 if (mLayoutDirty) {
42 // Layout or data has changed. Need to redraw.
43 foreach(QGraphicsItem* i, childItems()) {
44 i->paint(painter,option,widget);
45 }
46 }
47 }
48
49 QRectF BarGroup::boundingRect() const
50 {
51 // TODO: correct this (currently ignores position)
52 return QRectF(0,0,mWidth,mHeight);
53 }
54
55
56 void BarGroup::dataChanged()
57 {
58 qDebug() << "QBarChart::dataChanged mSeries";
59
60 // Find out maximum and minimum of all series
61 mMax = mSeries.max();
62 mMin = mSeries.min();
63
64 // Delete old bars
65 // Is this correct way to delete childItems?
66 foreach (QGraphicsItem* item, childItems()) {
67 delete item;
68 }
69
70 // Create new graphic items for bars
71 for (int i=0; i<mSeries.count(); i++) {
72 Bar *bar = new Bar(this);
73 childItems().append(bar);
74 }
75
76 mLayoutDirty = true;
77 }
78
79 void BarGroup::layoutChanged()
80 {
81 // Scale bars to new layout
82 // Layout for bars:
83 int count = mSeries.count();
84 if (count <= 0) {
85 // Nothing to do.
86 return;
87 }
88
89 // Align center
90 int posStep = (mWidth / (count));
91 int startPos = (mWidth / count+1);
92 qDebug() << "startpos" << startPos;
93
94 // Scaling. TODO: better one.
95 for (int i=0; i<count; i++) {
96 int barHeight = mSeries.valueAt(i) * mHeight / mMax;
97 Bar* bar = reinterpret_cast<Bar*> (childItems().at(i));
98
99 bar->resize(mBarDefaultWidth, barHeight); // TODO: width settable per bar
100 bar->setColor(mColor);
101 bar->setPos(i*posStep+startPos, 0);
102 }
103 mLayoutDirty = true;
104 }
105
106 QTCOMMERCIALCHART_END_NAMESPACE
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@@ -0,0 +1,55
1 #ifndef QBARCHART_H
2 #define QBARCHART_H
3
4 #include <QGraphicsItem>
5
6 #include "bar.h"
7 //#include "qbarchartview.h"
8 #include "barchartseries.h"
9
10 QTCOMMERCIALCHART_BEGIN_NAMESPACE
11
12 // TODO: Better name for this? The function of this class is to know where each bar in series is laid out.
13 // Class has knowledge of single series of data (owns vs reference?)
14 class BarGroup : public QGraphicsItem
15 {
16
17 public:
18 explicit BarGroup(BarChartSeries& series, QGraphicsItem *parent = 0);
19
20 // Layout "api"
21 void resize( int w, int h ); // Size for whole series. Single bars are drawn inside this area
22 void setPos(qreal x, qreal y);
23 void setBarWidth( int w ); // Default width for each bar
24 void setColor( QColor color ); // Default color for each bar
25
26 // From QGraphicsItem
27 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
28 QRectF boundingRect() const;
29
30 private:
31
32 void dataChanged(); // data of series has changed -> need to recalculate bar sizes
33 void layoutChanged(); // layout has changed -> need to recalculate bar sizes
34
35 private:
36
37 // Data
38 BarChartSeries& mSeries;
39 int mMin; // Min and max values of data. (updated when data is changed, used when drawing)
40 int mMax;
41
42 int mHeight; // Layout spesific
43 int mWidth;
44 int mBarDefaultWidth;
45
46 QColor mColor;
47
48 bool mLayoutSet; // True, if component has been laid out.
49 bool mLayoutDirty;
50
51 };
52
53 QTCOMMERCIALCHART_END_NAMESPACE
54
55 #endif // QBARCHART_H
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@@ -1,26 +1,32
1 #include "qbarchartbar.h"
1 #include "bar.h"
2 2 #include <QDebug>
3 3 #include <Qpainter>
4 4
5 QBarChartBar::QBarChartBar(QGraphicsItem *parent)
5 QTCOMMERCIALCHART_BEGIN_NAMESPACE
6
7 Bar::Bar(QGraphicsItem *parent)
6 8 : QGraphicsItem(parent)
7 9 {
8 10 }
9 11
10 void QBarChartBar::setSize( int h, int w )
12 void Bar::resize( int w, int h )
11 13 {
12 mHeight = h;
13 14 mWidth = w;
15 mHeight = h;
14 16 }
15 17
16 void QBarChartBar::setColor( QColor col )
18 void Bar::setColor( QColor col )
17 19 {
18 20 mColor = col;
19 21 }
22 void Bar::setPos(qreal x, qreal y)
23 {
24 mXpos = x;
25 mYpos = y;
26 }
20 27
21 void QBarChartBar::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
28 void Bar::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
22 29 {
23 qDebug() << "QBarChartBar::paint" << scenePos();
24 30 // Set color for bar. TODO: gradients, textures etc
25 31 QPen pen = painter->pen();
26 32 pen.setColor( mColor );
@@ -28,12 +34,17 void QBarChartBar::paint(QPainter *painter, const QStyleOptionGraphicsItem *opti
28 34 painter->setPen(pen);
29 35
30 36 // Draw bar
31 painter->drawLine(scenePos().x(), scenePos().y() + parentItem()->boundingRect().height(),
32 scenePos().x(), scenePos().y() + parentItem()->boundingRect().height() - mHeight );
37 // TODO: Pen width affects bar height for now. This should be rect
38 painter->drawLine(scenePos().x() + mXpos, scenePos().y() + mYpos + parentItem()->boundingRect().height() - mHeight - mWidth,
39 scenePos().x() + mXpos, scenePos().y() + mYpos + parentItem()->boundingRect().height() - mWidth);
33 40 }
34 41
35 QRectF QBarChartBar::boundingRect() const
42 QRectF Bar::boundingRect() const
36 43 {
37 QRectF r(scenePos().x(), scenePos().y(), scenePos().x() + mWidth, scenePos().y() + mHeight );
44 // TODO: check validity of this (I suppose there is easier way, and currently this bit incorrect :)
45 // QRectF r(scenePos().x()+mXpos, scenePos().y()+mYpos, scenePos().x() + mWidth, scenePos().y() + mHeight );
46 QRectF r(mXpos, mYpos, mXpos + mWidth, mYpos + mHeight);
38 47 return r;
39 48 }
49
50 QTCOMMERCIALCHART_END_NAMESPACE
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@@ -1,18 +1,21
1 #ifndef QBARCHARTBAR_H
2 #define QBARCHARTBAR_H
1 #ifndef BAR_H
2 #define BAR_H
3 3
4 4 #include <QGraphicsItem>
5 #include "qchartglobal.h"
5 6
6 // Single bar item of chart
7 QTCOMMERCIALCHART_BEGIN_NAMESPACE
7 8
8 class QBarChartBar : public QGraphicsItem
9 // Single bar item of chart
10 class Bar : public QGraphicsItem
9 11 {
10 12 public:
11 QBarChartBar(QGraphicsItem *parent=0);
13 Bar(QGraphicsItem *parent=0);
12 14
13 15 // Layout Stuff
14 void setSize( int h, int w ); // Size of bar. in screen coordinates.
15 void setColor( QColor col ); // Color of bar
16 void resize( int w, int h ); // Size of bar. in screen coordinates.
17 void setColor( QColor col ); // Color of bar
18 void setPos(qreal x, qreal y);
16 19
17 20 public:
18 21 // From QGraphicsItem
@@ -24,8 +27,11 private:
24 27
25 28 int mHeight;
26 29 int mWidth;
27 QPointF mPos;
30 qreal mXpos;
31 qreal mYpos;
28 32 QColor mColor;
29 33 };
30 34
31 #endif // QBARCHARTBAR_H
35 QTCOMMERCIALCHART_END_NAMESPACE
36
37 #endif // BAR_H
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@@ -4,6 +4,10
4 4 #include "qscatterseries_p.h"
5 5 #include "qpieseries.h"
6 6 #include "qxychartseries.h"
7
8 #include "barchartseries.h"
9 #include "bargroup.h"
10
7 11 #include "xylinechartitem_p.h"
8 12 #include "xyplotdomain_p.h"
9 13 #include "axis_p.h"
@@ -74,6 +78,18 void QChart::addSeries(QChartSeries* series)
74 78 // }
75 79 // break;
76 80 // }
81
82 case QChartSeries::SeriesTypeBar: {
83
84 qDebug() << "barSeries added";
85 BarChartSeries* barSeries = static_cast<BarChartSeries*>(series);
86
87 // Who owns the series?
88 BarGroup* group = new BarGroup(*barSeries, this);
89 scene()->addItem(group);
90 m_BarGroupItems.append(group); // If we need to access group later
91 break;
92 }
77 93 }
78 94 }
79 95
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@@ -12,6 +12,7 class XYGrid;
12 12 class QChartSeries;
13 13 class XYPlotDomain;
14 14 class XYLineChartItem;
15 class BarGroup;
15 16
16 17 // TODO: We don't need to have QChart tied to QGraphicsItem:
17 18 //class QTCOMMERCIALCHART_EXPORT QChart
@@ -57,6 +58,8 private:
57 58 QList<QGraphicsItem*> m_items;
58 59 int m_plotDataIndex;
59 60 int m_marginSize;
61
62 QList<BarGroup*> m_BarGroupItems;
60 63 };
61 64
62 65 QTCOMMERCIALCHART_END_NAMESPACE
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@@ -13,7 +13,7 public:
13 13 enum QChartSeriesType {
14 14 SeriesTypeLine = 0,
15 15 // SeriesTypeArea,
16 // SeriesTypeBar,
16 SeriesTypeBar,
17 17 SeriesTypePie,
18 18 SeriesTypeScatter
19 19 // SeriesTypeSpline
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@@ -24,6 +24,7 public:
24 24 QSize sizeHint() const;
25 25
26 26 // TODO: addSeries and createSeries are optional solutions
27 // TODO: currently createSeries assumes x, y value pairs. This isn't case with all charts. So is there another createSeries for other types (for example one list of ints)?
27 28 void addSeries(QChartSeries* series);
28 29 QChartSeries* createSeries(QList<qreal> x, QList<qreal> y, QChartSeries::QChartSeriesType type);
29 30
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@@ -11,7 +11,10 QT += core \
11 11 CONFIG += debug_and_release
12 12 CONFIG(debug, debug|release):TARGET = QtCommercialChartd
13 13
14 SOURCES += \
14 SOURCES += \
15 barchart/barchartseries.cpp \
16 barchart/bargroup.cpp \
17 barchart/bar.cpp \
15 18 xylinechart/qxychartseries.cpp \
16 19 xylinechart/xylinechartitem.cpp \
17 20 xylinechart/xygrid.cpp \
@@ -38,12 +41,15 PUBLIC_HEADERS += \
38 41 qchart.h \
39 42 qchartwidget.h \
40 43 qchartglobal.h \
41 xylinechart/qxychartseries.h
42
44 xylinechart/qxychartseries.h \
45 barchart/barchartseries.h \
46 barchart/bargroup.h
47
43 48 HEADERS += $$PUBLIC_HEADERS
44 49 HEADERS += $$PRIVATE_HEADERS
45 50
46 51 INCLUDEPATH += xylinechart \
52 barchart \
47 53 .
48 54
49 55 OBJECTS_DIR = $$CHART_BUILD_DIR/lib
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