qbarchart.cpp
92 lines
| 2.0 KiB
| text/x-c
|
CppLexer
sauimone
|
r10 | #include "qbarchart.h" | ||
| #include "qbarchartbar.h" | ||||
| #include <QDebug> | ||||
| QBarChart::QBarChart(QGraphicsItem *parent) : | ||||
| QGraphicsItem(parent) | ||||
| ,mBarDefaultWidth( 1 ) | ||||
| { | ||||
| } | ||||
| void QBarChart::addSeries(QList<int> data) | ||||
| { | ||||
| mData.clear(); | ||||
| mData.append(data); | ||||
| dataChanged(); | ||||
| } | ||||
| void QBarChart::setSize( int h, int w ) | ||||
| { | ||||
| mHeight = h; | ||||
| mWidth = w; | ||||
| dataChanged(); // TODO: separate data from grid | ||||
| } | ||||
| void QBarChart::setBarWidth( int w ) | ||||
| { | ||||
| mBarDefaultWidth = w; | ||||
| } | ||||
| void QBarChart::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||||
| { | ||||
| qDebug() << "QBarChart::paint"; | ||||
| } | ||||
| QRectF QBarChart::boundingRect() const | ||||
| { | ||||
| return QRectF(0,0,mWidth,mHeight); // TODO: size from layout | ||||
| } | ||||
| void QBarChart::dataChanged() | ||||
| { | ||||
| int count = mData.count(); | ||||
| if (count <= 0) { | ||||
| // No items | ||||
| return; | ||||
| } | ||||
| mMax = mData.at(0); | ||||
| mMin = mData.at(0); | ||||
| // Find out min and max values. | ||||
| for (int i=0; i<count; i++) { | ||||
| if (mData.at(i) > mMax) { | ||||
| mMax = mData.at(i); | ||||
| } else if (mData.at(i) < mMin) { | ||||
| mMin = mData.at(i); | ||||
| } | ||||
| } | ||||
| // Create items for data, delete old ones | ||||
| foreach (QGraphicsItem* i, childItems()) { | ||||
| delete i; | ||||
| } | ||||
| gridChanged(); | ||||
| int posStep = (mWidth / count) / 2; // TODO: Why I need magical 2 here to get correct step? | ||||
| for (int i=0; i<count; i++) { | ||||
| QBarChartBar *bar = new QBarChartBar(this); | ||||
| // Scaling. TODO: better one. | ||||
| int barHeight = mData.at(i) * mHeight / mMax; | ||||
| bar->setSize(barHeight, mBarDefaultWidth * 3 * i); // TODO: widht settable by style or something. | ||||
| bar->setColor(QColor(255 - i*25, i*10, i*15)); | ||||
| bar->setPos(i*posStep, 0); | ||||
| childItems().append(bar); | ||||
| } | ||||
| } | ||||
| void QBarChart::gridChanged() | ||||
| { | ||||
| // Scale of grid has changed | ||||
| QBarChartGrid *grid = new QBarChartGrid(this); | ||||
| grid->setSize(mHeight, mWidth); | ||||
| grid->setLimits(mMin,mMax); | ||||
| grid->setHorizontalLineCount(5); | ||||
| childItems().append(grid); | ||||
| } | ||||