README

Real time graph widget for Qt
Tested to compile with Qt 4.6

(Working draft. To be updated)
USAGE:
1) Create QRealTimeGraph object and add it to your layout:
QRealTimeGraph *rtgraph = new QRealTimeGraph(this);
ui->rtgraphLayout->addWidget(rtgraph);

Alternative way:
use QtDesigner to place QRealTimeGraph widget

2) Connect your data generator objects to setCurrentValue(double) slot

For example you have *torrent object and you want to draw an upload speed
graph. Then you need to emit ULspeed(double) and connect this signal to
QRealTimeGraph::setCurrentValue(double) slot:


connect(torrent, SIGNAL(ULspeed(double)),rtgraph,SLOT(setCurrentValue(double)));

In case you want to have more than 1 graph for same data source object,
you need to call setCurrentValue(double value, int channel) slot.
For this you should have currentSpeed(double value,int channel) signal,
where int channel is the unique number refering to the data type.

Example:
-----torrent object code-----
emit currentSpeed(uploadSpeed,1);
emit currentSpeed(downloadSpeed,2);
------------end--------------

connect (torrent,SIGNAL(currentSpeed(double,int),rtgraph,SLOT(setCurrentValue(double,int)));


Alternative way:
You can call slot directly. In this case you MUST specify channel and
pointer to QObject. If your data source object is not QObject childe
then you should convert pointer to your data source object to QObject
pointer. Pointer is only used as a key for data series object
inside graph object.

Example:
-----torrent object code-----
rtgraph->setCurrentValue(uploadSpeed,1,(QObject) this);
rtgraph->setCurrentValue(downloadSpeed,2,(QObject) this);

3) setColor