1 files changed, 74 insertions, 0 deletions
diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/ResizeColumnListener.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/ResizeColumnListener.java
new file mode 100644
index 00000000..104885fe
--- /dev/null
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/ResizeColumnListener.java
@@ -0,0 +1,74 @@
+package org.openslx.dozmod.gui.helper;
+
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+import javax.swing.table.*;
+
+public class ResizeColumnListener implements MouseListener {
+	private static Cursor resizeCursor = Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR);
+
+	private MouseListener uiListener;
+	private JTableHeader header;
+	private TableColumnAdjuster tca;
+
+	public ResizeColumnListener(JTable table) {
+		header = table.getTableHeader();
+		tca = new TableColumnAdjuster(table);
+
+		MouseListener[] listeners = header.getMouseListeners();
+
+		for (MouseListener ml : listeners) {
+			String className = ml.getClass().toString();
+
+			if (className.contains("BasicTableHeaderUI")) {
+				uiListener = ml;
+				header.removeMouseListener(ml);
+				header.addMouseListener(this);
+			}
+		}
+	}
+
+	@Override
+	public void mouseClicked(MouseEvent e) {
+		if (header.getCursor() != resizeCursor) {
+			uiListener.mouseClicked(e);
+			return;
+		}
+
+		// Handle the double click event to resize the column
+		// Note: The last 3 pixels + 3 pixels of next column are for resizing,
+		// so we need to adjust the mouse point to get the actual column.
+
+		if (e.getClickCount() == 2) {
+			Point p = e.getPoint();
+			p.x -= 3;
+			int column = header.columnAtPoint(p);
+			tca.adjustColumn(column);
+
+			// Generate event to reset the cursor
+			header.dispatchEvent(new MouseEvent(header, MouseEvent.MOUSE_MOVED, e.getWhen(), e.getModifiers(), e.getX(),
+					e.getY(), 0, false));
+		}
+	}
+
+	@Override
+	public void mouseEntered(MouseEvent e) {
+		uiListener.mouseEntered(e);
+	}
+
+	@Override
+	public void mouseExited(MouseEvent e) {
+		uiListener.mouseExited(e);
+	}
+
+	@Override
+	public void mousePressed(MouseEvent e) {
+		uiListener.mousePressed(e);
+	}
+
+	@Override
+	public void mouseReleased(MouseEvent e) {
+		uiListener.mouseReleased(e);
+	}
+}
+\ No newline at end of file