mirror/sqlitebrowser
1
0
Fork 0
mirror of https://github.com/sqlitebrowser/sqlitebrowser.git synced 2026-01-20 11:00:44 -06:00
Code Issues Packages Projects Releases Wiki Activity

plot: add some comments

Browse Source
This commit is contained in:
Peinthor Rene
2014-05-09 17:29:00 +02:00
parent 062f2df775
commit 9bd3cf1655
1 changed files with 18 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/MainWindow.cpp
View File

@@ -1453,12 +1453,16 @@ void MainWindow::updatePlot(SqliteTableModel *model, bool update)
}
QStringList yAxisLabels;
// right now we don't support more than 6 colors, they should be setable via the columns tree anyway
QVector<QColor> colors;
colors << Qt::blue << Qt::red << Qt::green << Qt::darkYellow << Qt::darkCyan << Qt::darkGray;
ui->plotWidget->clearGraphs();
if(xitem)
{
// regain the model column index and the datatype
// leading 16 bit are column index, the other 16 bit are the datatype
// right now datatype is only important for X axis (date, non date)
uint xitemdata = xitem->data(PlotColumnField, Qt::UserRole).toUInt();
int x = xitemdata >> 16;
int xtype = xitemdata & (uint)0xFF;
@@ -1481,6 +1485,8 @@ void MainWindow::updatePlot(SqliteTableModel *model, bool update)
QTreeWidgetItem* item = ui->treePlotColumns->topLevelItem(i);
if(item->checkState((PlotColumnY)) == Qt::Checked && ui->plotWidget->graphCount() < colors.size())
{
// regain the model column index and the datatype
// leading 16 bit are column index
uint itemdata = item->data(0, Qt::UserRole).toUInt();
int column = itemdata >> 16;
QCPGraph* graph = ui->plotWidget->addGraph();
@@ -1489,6 +1495,9 @@ void MainWindow::updatePlot(SqliteTableModel *model, bool update)
graph->setPen(QPen(colors[y]));
// prepare the data vectors for qcustomplot
// possible improvement might be a QVector subclass that directly
// access the model data, to save memory, we are copying here
QVector<double> xdata(model->rowCount()), ydata(model->rowCount());
for(int i = 0; i < model->rowCount(); ++i)
{
@@ -1506,10 +1515,19 @@ void MainWindow::updatePlot(SqliteTableModel *model, bool update)
ydata[i] = model->data(model->index(i, y)).toDouble();
}
// set some graph styles, this could also be improved to let the user choose
// some styling
graph->setData(xdata, ydata);
graph->setLineStyle(QCPGraph::lsLine);
graph->setScatterStyle(QCPScatterStyle(QCPScatterStyle::ssDisc, 5));
// gather Y label column names
yAxisLabels << model->headerData(y, Qt::Horizontal).toString();
// scaling is anything than optimal right now, the last selected
// Y axis will always "win" the scaling, either let the use choose
// or try to scale the plot by the graph with the biggest values
graph->rescaleAxes();
}
}