javax.swing.JTable#repaint ( )源码实例Demo

@Override
public void mouseMoved(MouseEvent e) {
    JTable aTable = (JTable) e.getSource();
    int mCol = aTable.columnAtPoint(e.getPoint());
    int mRow = aTable.rowAtPoint(e.getPoint());
    if (mCol != lastMCol || mRow != lastMRow) {
        lastMCol = mCol;
        lastMRow = mRow;
        if (mCol == 4) {
            aTable.repaint();
            MouseHelper.showHandCursor(aTable);
        } else {
            aTable.repaint();
            MouseHelper.showDefaultCursor(aTable);
        }
    }
}
 

@Override
public void mousePressed(MouseEvent e) {
    super.mousePressed(e);
    
    if(!SwingUtilities.isLeftMouseButton(e)) {
        return;
    }

    JTable t = getTable();
    Point p = e.getPoint();
    int row = t.rowAtPoint(p);
    int column = t.columnAtPoint(p);
    int rowCount = t.getRowCount();
    int columnCount = t.getColumnCount();

    if(column < 0 || row < 0 || column >= columnCount || row >= rowCount ) {
        return;
    }

    TableCellEditor tce = t.getCellEditor();
    if((tce==null) || (tce.shouldSelectCell(e))) {
        t.requestFocus();
        updateTableSelectionModel(row, column, e.isControlDown(), e.isShiftDown(), false);
        t.repaint();
    }
}
 

public void showPopupMenu(MouseEvent e)
{
    JTable table = (JTable) e.getSource();
    int row = table.rowAtPoint(e.getPoint());
    //int col = table.columnAtPoint(e.getPoint());
    boolean val = !((PacketTableModel) table.getModel()).getIsMarked(row);
    ((PacketTableModel) table.getModel()).setIsMarked(row, val);
    table.repaint();
}
 

@Override
public void mouseDragged(MouseEvent e) {           
    super.mouseDragged(e);

    if(!SwingUtilities.isLeftMouseButton(e)) {
        return;
    }

    
    JTable t = getTable();
    Point p = e.getPoint();
    int row = t.rowAtPoint(p);
    int column = t.columnAtPoint(p);
    int rowCount = t.getRowCount();
    int columnCount = t.getColumnCount();

    if(column < 0 || row < 0 || column >= columnCount || row >= rowCount ) {
        return;
    }

    TableCellEditor tce = t.getCellEditor();
    if(tce==null) {
        t.requestFocus();
        updateTableSelectionModel(row, column, e.isControlDown(), !e.isShiftDown(), true);
        t.repaint();
    }
}
 

/** Resize all columns in the table to fit widest row including header. */ 
public static void resizeColumns( JTable table) {
	if (table.getGraphics() == null) {
		return;
	}
	
	DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
	FontMetrics fm = table.getFontMetrics( renderer.getFont() );

	TableColumnModel mod = table.getColumnModel();
	for (int iCol = 0; iCol < mod.getColumnCount(); iCol++) {
		TableColumn col = mod.getColumn( iCol);
		
		int max = col.getPreferredWidth() - BUF;
		
		String header = table.getModel().getColumnName( iCol);
		if (header != null) {
			max = Math.max( max, fm.stringWidth( header) );
		}
		
		for (int iRow = 0; iRow < table.getModel().getRowCount(); iRow++) {
			Object obj = table.getModel().getValueAt(iRow, iCol);
			String str = obj == null ? "" : obj.toString();
			max = Math.max( max, fm.stringWidth( str) );
		}

		col.setPreferredWidth( max + BUF);
		col.setMaxWidth( MAX);
	}
	table.revalidate();
	table.repaint();
}
 

/**
 * Adjusts the column width of the row headers table containg the number
 * column. The font metrics are extracted from the label of the row at the
 * bottom of the viewport and used to determing the appropriate width.
 * 
 * The reason why this method is important, is that when the row number increases by an extra digit
 * the column needs to get wider. It also needs to shrink when scrolling to smaller digit numbers.
 * 
 * @param rowHeadersTable - single column table in the row header
 * @param label - label used to get font metrics
 * @param scrollBarValue - int value for determing point of lowest row
 */
private static void adjustColumnWidth(final JTable rowHeadersTable, final JLabel label, int scrollBarValue) {
	
	label.setFont(rowHeadersTable.getFont());
	label.setOpaque(true);
	label.setHorizontalAlignment(JLabel.CENTER);

	int v = rowHeadersTable.getVisibleRect().height;

	int row = rowHeadersTable.rowAtPoint(new Point(0, v + scrollBarValue));

	Integer modelValue = null;
	if (row != -1) {
		modelValue = (Integer) rowHeadersTable.getModel().getValueAt(row, 0);
	} else {
		RowHeadersTableModel tm = (RowHeadersTableModel) rowHeadersTable.getModel();
		modelValue = new Integer(tm.getMaxIntValue());
	}

	label.setText("" + modelValue);
	FontMetrics fontMetrics = label.getFontMetrics(label.getFont());

	int widthFactor = 0;

	if (fontMetrics != null && label.getText() != null) {
		widthFactor = fontMetrics.stringWidth(label.getText());

		rowHeadersTable.setPreferredScrollableViewportSize(new Dimension(widthFactor + 8, 100)); // height
																									// is
																									// ignored
		rowHeadersTable.repaint();
	}
}
 

@Override
public void mouseMoved(MouseEvent event) {
    // This should only be called if underlineOnRollover is true
    JTable table = (JTable) event.getSource();

    // Locate the table cell under the event location
    int oldHitColumnIndex = hitColumnIndex;
    int oldHitRowIndex = hitRowIndex;

    checkIfPointInsideHyperlink(event.getPoint());

    if (hitRowIndex != oldHitRowIndex ||
            hitColumnIndex != oldHitColumnIndex) {
        if (hitRowIndex != -1) {
            if (tableCursor == null) {
                tableCursor = table.getCursor();
            }
            table.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
        } else {
            table.setCursor(tableCursor);
        }

        // repaint the cells affected by rollover
        Rectangle repaintRect;
        if (hitRowIndex != -1 && hitColumnIndex != -1) {
            // we need to repaint new cell with rollover underline
            // cellRect already contains rect of hit cell
            if (oldHitRowIndex != -1 && oldHitColumnIndex != -1) {
                // we also need to repaint previously underlined hyperlink cell
                // to remove the underline
                repaintRect = cellRect.union(
                        table.getCellRect(oldHitRowIndex, oldHitColumnIndex, false));
            } else {
                // we don't have a previously underlined hyperlink, so just repaint new one'
                repaintRect = table.getCellRect(hitRowIndex, hitColumnIndex, false);
            }
        } else {
            // we just need to repaint previously underlined hyperlink cell
            //to remove the underline
            repaintRect = table.getCellRect(oldHitRowIndex, oldHitColumnIndex, false);
        }
        table.repaint(repaintRect);
    }

}
 

@Override
public void mouseMoved(MouseEvent event) {
    // This should only be called if underlineOnRollover is true
    JTable table = (JTable) event.getSource();

    // Locate the table cell under the event location
    int oldHitColumnIndex = hitColumnIndex;
    int oldHitRowIndex = hitRowIndex;

    checkIfPointInsideHyperlink(event.getPoint());

    if (hitRowIndex != oldHitRowIndex ||
            hitColumnIndex != oldHitColumnIndex) {
        if (hitRowIndex != -1) {
            if (tableCursor == null) {
                tableCursor = table.getCursor();
            }
            table.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
        } else {
            table.setCursor(tableCursor);
        }

        // repaint the cells affected by rollover
        Rectangle repaintRect;
        if (hitRowIndex != -1 && hitColumnIndex != -1) {
            // we need to repaint new cell with rollover underline
            // cellRect already contains rect of hit cell
            if (oldHitRowIndex != -1 && oldHitColumnIndex != -1) {
                // we also need to repaint previously underlined hyperlink cell
                // to remove the underline
                repaintRect = cellRect.union(
                        table.getCellRect(oldHitRowIndex, oldHitColumnIndex, false));
            } else {
                // we don't have a previously underlined hyperlink, so just repaint new one'
                repaintRect = table.getCellRect(hitRowIndex, hitColumnIndex, false);
            }
        } else {
            // we just need to repaint previously underlined hyperlink cell
            //to remove the underline
            repaintRect = table.getCellRect(oldHitRowIndex, oldHitColumnIndex, false);
        }
        table.repaint(repaintRect);
    }

}
 

private void setSizeAndDimensions(@NotNull JTable table, @NotNull JBPopup popup,
    @NotNull RelativePoint popupPosition, @NotNull List<UsageNode> data) {
  JComponent content = popup.getContent();
  Window window = SwingUtilities.windowForComponent(content);
  Dimension d = window.getSize();

  int width = calcMaxWidth(table);
  width = (int) Math.max(d.getWidth(), width);
  Dimension headerSize = ((AbstractPopup) popup).getHeaderPreferredSize();
  width = Math.max((int) headerSize.getWidth(), width);
  width = Math.max(myWidth, width);

  if (myWidth == -1) myWidth = width;
  int newWidth = Math.max(width, d.width + width - myWidth);

  myWidth = newWidth;

  int rowsToShow = Math.min(30, data.size());
  Dimension dimension = new Dimension(newWidth, table.getRowHeight() * rowsToShow);
  Rectangle rectangle = fitToScreen(dimension, popupPosition, table);
  dimension = rectangle.getSize();
  Point location = window.getLocation();
  if (!location.equals(rectangle.getLocation())) {
    window.setLocation(rectangle.getLocation());
  }

  if (!data.isEmpty()) {
    TableScrollingUtil.ensureSelectionExists(table);
  }
  table.setSize(dimension);
  //table.setPreferredSize(dimension);
  //table.setMaximumSize(dimension);
  //table.setPreferredScrollableViewportSize(dimension);

  Dimension footerSize = ((AbstractPopup) popup).getFooterPreferredSize();

  int newHeight = (int) (dimension.height + headerSize.getHeight() + footerSize.getHeight()) + 4/* invisible borders, margins etc*/;
  Dimension newDim = new Dimension(dimension.width, newHeight);
  window.setSize(newDim);
  window.setMinimumSize(newDim);
  window.setMaximumSize(newDim);

  window.validate();
  window.repaint();
  table.revalidate();
  table.repaint();
}
 

private void setSizeAndDimensions(@NotNull JTable table,
    @NotNull JBPopup popup,
    @NotNull RelativePoint popupPosition,
    @NotNull List<UsageNode> data) {
  JComponent content = popup.getContent();
  Window window = SwingUtilities.windowForComponent(content);
  Dimension d = window.getSize();

  int width = calcMaxWidth(table);
  width = (int)Math.max(d.getWidth(), width);
  Dimension headerSize = ((AbstractPopup)popup).getHeaderPreferredSize();
  width = Math.max((int)headerSize.getWidth(), width);
  width = Math.max(myWidth, width);

  if (myWidth == -1) myWidth = width;
  int newWidth = Math.max(width, d.width + width - myWidth);

  myWidth = newWidth;

  int rowsToShow = Math.min(30, data.size());
  Dimension dimension = new Dimension(newWidth, table.getRowHeight() * rowsToShow);
  Rectangle rectangle = fitToScreen(dimension, popupPosition, table);
  dimension = rectangle.getSize();
  Point location = window.getLocation();
  if (!location.equals(rectangle.getLocation())) {
    window.setLocation(rectangle.getLocation());
  }

  if (!data.isEmpty()) {
    TableScrollingUtil.ensureSelectionExists(table);
  }
  table.setSize(dimension);
  //table.setPreferredSize(dimension);
  //table.setMaximumSize(dimension);
  //table.setPreferredScrollableViewportSize(dimension);


  Dimension footerSize = ((AbstractPopup)popup).getFooterPreferredSize();

  int newHeight = (int)(dimension.height + headerSize.getHeight() + footerSize.getHeight()) + 4/* invisible borders, margins etc*/;
  Dimension newDim = new Dimension(dimension.width, newHeight);
  window.setSize(newDim);
  window.setMinimumSize(newDim);
  window.setMaximumSize(newDim);

  window.validate();
  window.repaint();
  table.revalidate();
  table.repaint();
}