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Version vom 28. Januar 2012, 07:21 Uhr
<code=java> /*
* AutofitTableColumns.java * @author: omcgovern * 23.06.2007 added "fit"-option: uhrand (André Uhres) */
import java.awt.*; import javax.swing.*; import javax.swing.text.*; import javax.swing.table.*;
public class AutofitTableColumns {
private static final int DEFAULT_COLUMN_PADDING = 5; /* * @param JTable aTable, the JTable to autoresize the columns on * @param boolean includeColumnHeaderWidth, use the Column Header width as a minimum width * @returns The table width, just in case the caller wants it... */
public static int autoResizeTable(JTable aTable, boolean includeColumnHeaderWidth) { return (autoResizeTable(aTable, includeColumnHeaderWidth, DEFAULT_COLUMN_PADDING)); } /* * @param JTable aTable, the JTable to autoresize the columns on * @param boolean includeColumnHeaderWidth, use the Column Header width as a minimum width * @param int columnPadding, how many extra pixels do you want on the end of each column * @returns The table width, just in case the caller wants it... */
public static int autoResizeTable(JTable aTable, boolean includeColumnHeaderWidth, int columnPadding) { return (autoResizeTable(aTable, includeColumnHeaderWidth, columnPadding, false)); } /* * @param JTable aTable, the JTable to autoresize the columns on * @param boolean includeColumnHeaderWidth, use the Column Header width as a minimum width * @param int columnPadding, how many extra pixels do you want on the end of each column * @param boolean fit, if you want the whole visible Area to be used * @returns The table width, just in case the caller wants it... */
public static int autoResizeTable(JTable aTable, boolean includeColumnHeaderWidth, int columnPadding, boolean fit) { // NOTE: the "fit"-option has been added by uhrand int columnCount = aTable.getColumnCount(); int currentTableWidth = aTable.getWidth(); int tableWidth = 0; Dimension cellSpacing = aTable.getIntercellSpacing(); if (columnCount > 0) // must have columns ! { // STEP ONE : Work out the column widths int columnWidth[] = new int[columnCount]; for (int i = 0; i < columnCount; i++) { columnWidth[i] = getMaxColumnWidth(aTable, i, true, columnPadding); tableWidth += columnWidth[i]; } // account for cell spacing too tableWidth += ((columnCount - 1) * cellSpacing.width); // STEP TWO : Dynamically resize each column // try changing the size of the column names area JTableHeader tableHeader = aTable.getTableHeader(); Dimension headerDim = tableHeader.getPreferredSize(); // headerDim.height = tableHeader.getHeight(); headerDim.width = tableWidth;
// tableHeader.setPreferredSize( headerDim );//commented out by uhrand (caused resize bug)
Dimension interCellSpacing = aTable.getIntercellSpacing(); Dimension dim = new Dimension(); int rowHeight = aTable.getRowHeight(); if (rowHeight == 0) { rowHeight = 16; // default rowheight } dim.height = headerDim.height + ((rowHeight + interCellSpacing.height) * aTable.getRowCount()); dim.width = tableWidth; // aTable.setPreferredSize ( dim ); int viewWidth = currentTableWidth; //uhrand Component parent = aTable.getParent(); //uhrand if (parent instanceof JViewport) { //uhrand JViewport port = (JViewport) parent; //uhrand viewWidth = port.getExtentSize().width; //uhrand } //uhrand if (fit && tableWidth != viewWidth) { //uhrand int corr = (viewWidth - //uhrand tableWidth) / columnCount; //uhrand tableWidth = 0; //uhrand for (int i = 0; i < columnCount; i++) { //uhrand columnWidth[i] += corr; //uhrand tableWidth += columnWidth[i]; //uhrand } //uhrand if (tableWidth != viewWidth) { //uhrand columnWidth[columnCount - 1] += //uhrand (viewWidth - tableWidth); //uhrand tableWidth = viewWidth; //uhrand } //uhrand } //uhrand TableColumnModel tableColumnModel = aTable.getColumnModel(); TableColumn tableColumn; for (int i = 0; i < columnCount; i++) { tableColumn = tableColumnModel.getColumn(i);
// System.out.println(tableColumn.getHeaderValue()+" "+columnWidth[i]);
tableColumn.setPreferredWidth(columnWidth[i]); } aTable.invalidate(); aTable.doLayout(); aTable.repaint(); } return (tableWidth); } /* * @param JTable aTable, the JTable to autoresize the columns on * @param int columnNo, the column number, starting at zero, to calculate the maximum width on * @param boolean includeColumnHeaderWidth, use the Column Header width as a minimum width * @param int columnPadding, how many extra pixels do you want on the end of each column * @returns The maximum Column Width */
private static int getMaxColumnWidth(JTable aTable, int columnNo, boolean includeColumnHeaderWidth, int columnPadding) { TableColumn column = aTable.getColumnModel().getColumn(columnNo); Component comp = null; int maxWidth = 0; if (includeColumnHeaderWidth) { TableCellRenderer headerRenderer = column.getHeaderRenderer(); if (headerRenderer != null) { comp = headerRenderer.getTableCellRendererComponent(aTable, column.getHeaderValue(), false, false, 0, columnNo); if (comp instanceof JTextComponent) { JTextComponent jtextComp = (JTextComponent) comp; String text = jtextComp.getText(); Font font = jtextComp.getFont(); FontMetrics fontMetrics = jtextComp.getFontMetrics(font); maxWidth = SwingUtilities.computeStringWidth(fontMetrics, text); } else { maxWidth = comp.getPreferredSize().width; } } else { try { String headerText = (String) column.getHeaderValue(); JLabel defaultLabel = new JLabel(headerText); Font font = defaultLabel.getFont(); FontMetrics fontMetrics = defaultLabel.getFontMetrics(font); maxWidth = SwingUtilities.computeStringWidth(fontMetrics, headerText); } catch (final ClassCastException ce) { // Can't work out the header column width.. maxWidth = 0; } } } TableCellRenderer tableCellRenderer; int cellWidth = 0; for (int i = 0; i < aTable.getRowCount(); i++) { tableCellRenderer = aTable.getCellRenderer(i, columnNo); comp = tableCellRenderer.getTableCellRendererComponent(aTable, aTable.getValueAt(i, columnNo), false, false, i, columnNo); if (comp instanceof JTextComponent) { JTextComponent jtextComp = (JTextComponent) comp; String text = jtextComp.getText(); Font font = jtextComp.getFont(); FontMetrics fontMetrics = jtextComp.getFontMetrics(font); int textWidth = SwingUtilities.computeStringWidth(fontMetrics, text); maxWidth = Math.max(maxWidth, textWidth); } else { cellWidth = comp.getPreferredSize().width; // maxWidth = Math.max ( headerWidth, cellWidth ); maxWidth = Math.max(maxWidth, cellWidth); } } return (maxWidth + columnPadding); }
private AutofitTableColumns() { }
} </code=java>