public void actionPerformed()

in src/components/src/main/java/org/apache/jmeter/visualizers/RespTimeGraphVisualizer.java [510:567]
54 lines of code
21 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(e.getMessage());
            }
        } else if (eventSource == syncWithName) {
            graphTitle.setText(getName());
        } else if (eventSource == dynamicGraphSize) {
            enableDynamicGraph(dynamicGraphSize.isSelected());
        } else if (eventSource == samplerSelection) {
            enableSamplerSelection(samplerSelection.isSelected());
            if (!samplerSelection.isSelected()) {
                // Force reload data
                forceReloadData = true;
            }
        }
        // Not 'else if' because forceReloadData
        if (eventSource == applyFilterBtn || eventSource == intervalButton || forceReloadData) {
            if (eventSource == intervalButton) {
                intervalValue = Integer.parseInt(intervalField.getText());
            }
            if (eventSource == applyFilterBtn && samplerSelection.isSelected() && samplerMatchLabel.getText() != null
                    && samplerMatchLabel.getText().length() > 0) {
                pattern = createPattern(samplerMatchLabel.getText());
            } else if (forceReloadData) {
                pattern = null;
            }
            if (getFile() != null && getFile().length() > 0) {
                // Reload data from file
                clearData();
                FilePanel filePanel = (FilePanel) getFilePanel();
                filePanel.actionPerformed(event);
            } else {
                // Reload data form internal list of results
                synchronized (lockInterval) {
                    if (internalList.size() >= 2) {
                        List<RespTimeGraphDataBean> tempList = new ArrayList<>();
                        tempList.addAll(internalList);
                        this.clearData();
                        for (RespTimeGraphDataBean data : tempList) {
                            SampleResult sr = new SampleResult(data.getStartTime(), data.getTime());
                            sr.setSampleLabel(data.getSamplerLabel());
                            this.add(sr);
                        }
                    }
                }
            }
        }
    }