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refactor: unify snapshot and edgelist export to use ExportActions pattern #114

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sauravbhattacharya001 merged 1 commit into from
Mar 28, 2026
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refactor: unify snapshot and edgelist export to use ExportActions pattern #114

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89 changes: 24 additions & 65 deletions Gvisual/src/gvisual/ToolbarBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -12,9 +12,6 @@
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.List;
import java.util.function.Supplier;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.commons.io.FileUtils;

Expand All @@ -31,8 +28,6 @@
*/
public final class ToolbarBuilder {

private static final Logger LOGGER = Logger.getLogger(ToolbarBuilder.class.getName());

/** Callback interface for the host to supply live graph + Edge data. */
public interface GraphContext {
/** Current graph (may be null before a file is loaded). */
Expand Down Expand Up @@ -111,71 +106,35 @@ private static void addModeButtons(JPanel panel, GraphContext ctx) {
/* ---- Snapshot ---- */

private static void addSnapshotButton(JPanel panel, GraphContext ctx) {
JButton btn = new JButton(
"<html><center>Take a snapshot<br/>Use this to<br/> take and image<br/> of the current view<br/> of the graph</center></html>");
btn.setPreferredSize(new Dimension(140, 100));
btn.addActionListener(e -> {
JFileChooser fc;
int count = 0;
do {
if (count != 0) {
JOptionPane.showMessageDialog(null,
"File with same name already exists!!!", "Error!!", 1);
}
count++;
fc = new JFileChooser(System.getProperty("user.dir"));
fc.showSaveDialog(null);
} while (fc.getSelectedFile() != null && fc.getSelectedFile().exists());

if (fc.getSelectedFile() == null) return;
File curFile = new File(fc.getSelectedFile().toString() + ".png");
try {
curFile.createNewFile();
} catch (IOException ex) {
LOGGER.log(Level.SEVERE, null, ex);
}
PNGDump dumper = new PNGDump();
try {
dumper.dumpComponent(curFile, ctx.getVisualizationViewer());
} catch (IOException ex) {
LOGGER.log(Level.SEVERE, "Snapshot failed", ex);
}
});
panel.add(btn);
ExportActions.addExportButton(panel, null,
"<html><center>Take a snapshot<br/>Use this to<br/> take an image<br/> of the current view<br/> of the graph</center></html>",
"Save Snapshot",
() -> "snapshot_" + ctx.getTimestamp() + ".png",
new String[]{".png"},
outFile -> {
PNGDump dumper = new PNGDump();
dumper.dumpComponent(outFile, ctx.getVisualizationViewer());
return "Snapshot saved!\nFile: " + outFile.getName();
});
}

/* ---- Edge-list CSV export ---- */

private static void addEdgelistExportButton(JPanel panel) {
JButton btn = new JButton(
"<html><center>Export edgelist<br/>Export the graph<br/> Edge list in<br/> CSV format.</center></html>");
btn.setPreferredSize(new Dimension(140, 100));
btn.addActionListener(e -> {
JFileChooser fc;
int count = 0;
do {
if (count != 0) {
JOptionPane.showMessageDialog(null,
"File with same name already exists!!!", "Error!!", 1);
}
count++;
fc = new JFileChooser(System.getProperty("user.dir"));
fc.showSaveDialog(null);
} while (fc.getSelectedFile() != null && fc.getSelectedFile().exists());

if (fc.getSelectedFile() == null) return;
try {
fc.getSelectedFile().createNewFile();
} catch (IOException ex) {
LOGGER.log(Level.SEVERE, null, ex);
}
try {
FileUtils.copyFile(new File("./graph.txt"), fc.getSelectedFile());
} catch (IOException ex) {
LOGGER.log(Level.SEVERE, null, ex);
}
});
panel.add(btn);
ExportActions.addExportButton(panel, null,
"<html><center>Export edgelist<br/>Export the graph<br/> Edge list in<br/> CSV format.</center></html>",
"Export Edge List",
() -> "edgelist.csv",
new String[]{".csv"},
outFile -> {
File source = new File("./graph.txt");
if (!source.exists()) {
throw new FileNotFoundException(
"Edge-list source file (graph.txt) not found in working directory.");
}
FileUtils.copyFile(source, outFile);
return "Edge list exported!\nFile: " + outFile.getName();
});
}

/* ---- GraphML export ---- */
Expand Down
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