public void actionPerformed()

in src/components/src/main/java/org/apache/jmeter/visualizers/StatGraphVisualizer.java [716:806]
86 lines of code
27 McCabe index (conditional complexity)

    public void actionPerformed(ActionEvent event) {
        boolean forceReloadData = false;
        final Object eventSource = event.getSource();
        if (eventSource == displayButton) {
            actionMakeGraph();
        } else if (eventSource == saveGraph) {
            saveGraphToFile = true;
            try {
                ActionRouter.getInstance().getAction(
                        ActionNames.SAVE_GRAPHICS,SaveGraphics.class.getName()).doAction(
                                new ActionEvent(this,event.getID(),ActionNames.SAVE_GRAPHICS));
            } catch (Exception e) {
                log.error("Error saving to file", e);
            }
        } else if (eventSource == saveTable) {
            JFileChooser chooser = FileDialoger.promptToSaveFile("statistics.csv");    //$NON-NLS-1$
            if (chooser == null) {
                return;
            }
            try (FileOutputStream fo = new FileOutputStream(chooser.getSelectedFile());
                    OutputStreamWriter writer = new OutputStreamWriter(fo, Charset.forName("UTF-8"))){
                CSVSaveService.saveCSVStats(getAllTableData(model, getFormatters()),
                        writer,
                        saveHeaders.isSelected() ? getLabels(COLUMNS, getColumnsMsgParameters()) : null);
            } catch (IOException e) { // NOSONAR Error is reported in GUI
                JMeterUtils.reportErrorToUser(e.getMessage(), "Error saving data");
            }
        } else if (eventSource == chooseForeColor) {
            Color color = JColorChooser.showDialog(
                    null,
                    JMeterUtils.getResString("aggregate_graph_choose_color"), //$NON-NLS-1$
                    colorBarGraph);
            if (color != null) {
                colorForeGraph = color;
            }
        } else if (eventSource == syncWithName) {
            graphTitle.setText(getName());
        } else if (eventSource == dynamicGraphSize) {
            // if use dynamic graph size is checked, we disable the dimension fields
            if (dynamicGraphSize.isSelected()) {
                graphWidth.setEnabled(false);
                graphHeight.setEnabled(false);
            } else {
                graphWidth.setEnabled(true);
                graphHeight.setEnabled(true);
            }
        } else if (eventSource == columnSelection) {
            if (columnSelection.isSelected()) {
                columnMatchLabel.setEnabled(true);
                applyFilterBtn.setEnabled(true);
                caseChkBox.setEnabled(true);
                regexpChkBox.setEnabled(true);
            } else {
                columnMatchLabel.setEnabled(false);
                applyFilterBtn.setEnabled(false);
                caseChkBox.setEnabled(false);
                regexpChkBox.setEnabled(false);
                // Force reload data
                forceReloadData = true;
            }
        }
        // Not 'else if' because forceReloadData
        if (eventSource == applyFilterBtn || forceReloadData) {
            if (columnSelection.isSelected() && columnMatchLabel.getText() != null
                    && columnMatchLabel.getText().length() > 0) {
                pattern = createPattern(columnMatchLabel.getText());
            } else if (forceReloadData) {
                pattern = null;
            }
            if (getFile() != null && getFile().length() > 0) {
                clearData();
                FilePanel filePanel = (FilePanel) getFilePanel();
                filePanel.actionPerformed(event);
            }
        } else if (eventSource instanceof JButton) {
            // Changing color for column
            JButton btn = (JButton) eventSource;
            if (btn.getName() != null) {
                try {
                    BarGraph bar = eltList.get(Integer.parseInt(btn.getName()));
                    Color color = JColorChooser.showDialog(null, bar.getLabel(), bar.getBackColor());
                    if (color != null) {
                        bar.setBackColor(color);
                        btn.setBackground(bar.getBackColor());
                    }
                } catch (NumberFormatException nfe) {
                    // nothing to do
                }
            }
        }
    }