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WebLaf is a Java Swing Look and Feel and extended components library for cross-platform applications
package com.alee.laf.table;
import com.alee.laf.table.ITablePainter;
import com.alee.laf.table.WebTable;
import com.alee.laf.table.WebTableUI;
import com.alee.managers.tooltip.ToolTipProvider;
import com.alee.painter.AbstractPainter;
import com.alee.utils.CompareUtils;
import javax.swing.*;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
/**
* @author Alexandr Zernov
*/
public class TablePainter extends AbstractPainter implements ITablePainter
{
/**
* Listeners.
*/
protected MouseAdapter mouseAdapter;
/**
* Runtime variables.
*/
protected Point rolloverCell;
/**
* Painting variables.
*/
protected CellRendererPane rendererPane = null;
@Override
public void install ( final E c, final U ui )
{
super.install ( c, ui );
// Rollover listener
mouseAdapter = new MouseAdapter ()
{
@Override
public void mouseMoved ( final MouseEvent e )
{
updateMouseover ( e );
}
@Override
public void mouseDragged ( final MouseEvent e )
{
updateMouseover ( e );
}
@Override
public void mouseExited ( final MouseEvent e )
{
clearMouseover ();
}
private void updateMouseover ( final MouseEvent e )
{
final Point point = e.getPoint ();
final Point cell = p ( component.columnAtPoint ( point ), component.rowAtPoint ( point ) );
if ( cell.x != -1 && cell.y != -1 )
{
if ( !CompareUtils.equals ( rolloverCell, cell ) )
{
updateRolloverCell ( rolloverCell, cell );
}
}
else
{
clearMouseover ();
}
}
private void clearMouseover ()
{
if ( rolloverCell != null )
{
updateRolloverCell ( rolloverCell, null );
}
}
private void updateRolloverCell ( final Point oldCell, final Point newCell )
{
// Updating rollover cell
rolloverCell = newCell;
// Updating custom WebLaF tooltip display state
final ToolTipProvider provider = getToolTipProvider ();
if ( provider != null )
{
final int oldIndex = oldCell != null ? oldCell.y : -1;
final int oldColumn = oldCell != null ? oldCell.x : -1;
final int newIndex = newCell != null ? newCell.y : -1;
final int newColumn = newCell != null ? newCell.x : -1;
provider.hoverCellChanged ( component, oldIndex, oldColumn, newIndex, newColumn );
}
}
};
component.addMouseListener ( mouseAdapter );
component.addMouseMotionListener ( mouseAdapter );
}
@Override
public void uninstall ( final E c, final U ui )
{
// Removing listeners
component.removeMouseListener ( mouseAdapter );
component.removeMouseMotionListener ( mouseAdapter );
mouseAdapter = null;
super.uninstall ( c, ui );
}
@Override
public void prepareToPaint ( final CellRendererPane rendererPane )
{
this.rendererPane = rendererPane;
}
@Override
public void paint ( final Graphics2D g2d, final Rectangle bounds, final E c, final U ui )
{
final Rectangle clip = g2d.getClipBounds ();
// Rectangle bounds = table.getBounds();
// account for the fact that the graphics has already been translated
// into the table's bounds
// bounds.x = bounds.y = 0;
if ( component.getRowCount () <= 0 || component.getColumnCount () <= 0 ||
// this check prevents us from painting the entire table
// when the clip doesn't intersect our bounds at all
!bounds.intersects ( clip ) )
{
paintDropLines ( g2d );
return;
}
final Point upperLeft = clip.getLocation ();
if ( !ltr )
{
upperLeft.x++;
}
final Point lowerRight = p ( clip.x + clip.width - ( ltr ? 1 : 0 ), clip.y + clip.height );
int rMin = component.rowAtPoint ( upperLeft );
int rMax = component.rowAtPoint ( lowerRight );
// This should never happen (as long as our bounds intersect the clip,
// which is why we bail above if that is the case).
if ( rMin == -1 )
{
rMin = 0;
}
// If the table does not have enough rows to fill the view we'll get -1.
// (We could also get -1 if our bounds don't intersect the clip,
// which is why we bail above if that is the case).
// Replace this with the index of the last row.
if ( rMax == -1 )
{
rMax = component.getRowCount () - 1;
}
int cMin = component.columnAtPoint ( ltr ? upperLeft : lowerRight );
int cMax = component.columnAtPoint ( ltr ? lowerRight : upperLeft );
// This should never happen.
if ( cMin == -1 )
{
cMin = 0;
}
// If the table does not have enough columns to fill the view we'll get -1.
// Replace this with the index of the last column.
if ( cMax == -1 )
{
cMax = component.getColumnCount () - 1;
}
// Paint the grid.
paintGrid ( g2d, rMin, rMax, cMin, cMax );
// Paint the cells.
paintCells ( g2d, rMin, rMax, cMin, cMax );
paintDropLines ( g2d );
rendererPane = null;
}
protected void paintDropLines ( final Graphics g )
{
final JTable.DropLocation loc = component.getDropLocation ();
if ( loc == null )
{
return;
}
final Color color = UIManager.getColor ( "Table.dropLineColor" );
final Color shortColor = UIManager.getColor ( "Table.dropLineShortColor" );
if ( color == null && shortColor == null )
{
return;
}
Rectangle rect;
rect = getHDropLineRect ( loc );
if ( rect != null )
{
final int x = rect.x;
final int w = rect.width;
if ( color != null )
{
extendRect ( rect, true );
g.setColor ( color );
g.fillRect ( rect.x, rect.y, rect.width, rect.height );
}
if ( !loc.isInsertColumn () && shortColor != null )
{
g.setColor ( shortColor );
g.fillRect ( x, rect.y, w, rect.height );
}
}
rect = getVDropLineRect ( loc );
if ( rect != null )
{
final int y = rect.y;
final int h = rect.height;
if ( color != null )
{
extendRect ( rect, false );
g.setColor ( color );
g.fillRect ( rect.x, rect.y, rect.width, rect.height );
}
if ( !loc.isInsertRow () && shortColor != null )
{
g.setColor ( shortColor );
g.fillRect ( rect.x, y, rect.width, h );
}
}
}
protected Rectangle getHDropLineRect ( final JTable.DropLocation loc )
{
if ( !loc.isInsertRow () )
{
return null;
}
int row = loc.getRow ();
int col = loc.getColumn ();
if ( col >= component.getColumnCount () )
{
col--;
}
final Rectangle rect = component.getCellRect ( row, col, true );
if ( row >= component.getRowCount () )
{
row--;
final Rectangle prevRect = component.getCellRect ( row, col, true );
rect.y = prevRect.y + prevRect.height;
}
if ( rect.y == 0 )
{
rect.y = -1;
}
else
{
rect.y -= 2;
}
rect.height = 3;
return rect;
}
protected Rectangle getVDropLineRect ( final JTable.DropLocation loc )
{
if ( !loc.isInsertColumn () )
{
return null;
}
int col = loc.getColumn ();
Rectangle rect = component.getCellRect ( loc.getRow (), col, true );
if ( col >= component.getColumnCount () )
{
col--;
rect = component.getCellRect ( loc.getRow (), col, true );
if ( ltr )
{
rect.x = rect.x + rect.width;
}
}
else if ( !ltr )
{
rect.x = rect.x + rect.width;
}
if ( rect.x == 0 )
{
rect.x = -1;
}
else
{
rect.x -= 2;
}
rect.width = 3;
return rect;
}
protected Rectangle extendRect ( final Rectangle rect, final boolean horizontal )
{
if ( rect != null )
{
if ( horizontal )
{
rect.x = 0;
rect.width = component.getWidth ();
}
else
{
rect.y = 0;
if ( component.getRowCount () != 0 )
{
final Rectangle lastRect = component.getCellRect ( component.getRowCount () - 1, 0, true );
rect.height = lastRect.y + lastRect.height;
}
else
{
rect.height = component.getHeight ();
}
}
}
return rect;
}
/*
* Paints the grid lines within aRect, using the grid color set with setGridColor. Paints vertical lines
* if getShowVerticalLines() returns true and paints horizontal lines if getShowHorizontalLines()
* returns true.
*/
protected void paintGrid ( final Graphics g, final int rMin, final int rMax, final int cMin, final int cMax )
{
g.setColor ( component.getGridColor () );
final Rectangle minCell = component.getCellRect ( rMin, cMin, true );
final Rectangle maxCell = component.getCellRect ( rMax, cMax, true );
final Rectangle damagedArea = minCell.union ( maxCell );
if ( component.getShowHorizontalLines () )
{
final int tableWidth = damagedArea.x + damagedArea.width;
int y = damagedArea.y;
for ( int row = rMin; row <= rMax; row++ )
{
y += component.getRowHeight ( row );
g.drawLine ( damagedArea.x, y - 1, tableWidth - 1, y - 1 );
}
}
if ( component.getShowVerticalLines () )
{
final TableColumnModel cm = component.getColumnModel ();
final int tableHeight = damagedArea.y + damagedArea.height;
int x;
if ( ltr )
{
x = damagedArea.x;
for ( int column = cMin; column <= cMax; column++ )
{
final int w = cm.getColumn ( column ).getWidth ();
x += w;
g.drawLine ( x - 1, 0, x - 1, tableHeight - 1 );
}
}
else
{
x = damagedArea.x;
for ( int column = cMax; column >= cMin; column-- )
{
final int w = cm.getColumn ( column ).getWidth ();
x += w;
g.drawLine ( x - 1, 0, x - 1, tableHeight - 1 );
}
}
}
}
protected void paintCells ( final Graphics g, final int rMin, final int rMax, final int cMin, final int cMax )
{
final JTableHeader header = component.getTableHeader ();
final TableColumn draggedColumn = ( header == null ) ? null : header.getDraggedColumn ();
final TableColumnModel cm = component.getColumnModel ();
final int columnMargin = cm.getColumnMargin ();
Rectangle cellRect;
TableColumn aColumn;
int columnWidth;
if ( ltr )
{
for ( int row = rMin; row <= rMax; row++ )
{
cellRect = component.getCellRect ( row, cMin, false );
for ( int column = cMin; column <= cMax; column++ )
{
aColumn = cm.getColumn ( column );
columnWidth = aColumn.getWidth ();
cellRect.width = columnWidth - columnMargin;
if ( aColumn != draggedColumn )
{
paintCell ( g, cellRect, row, column );
}
cellRect.x += columnWidth;
}
}
}
else
{
for ( int row = rMin; row <= rMax; row++ )
{
cellRect = component.getCellRect ( row, cMin, false );
aColumn = cm.getColumn ( cMin );
if ( aColumn != draggedColumn )
{
columnWidth = aColumn.getWidth ();
cellRect.width = columnWidth - columnMargin;
paintCell ( g, cellRect, row, cMin );
}
for ( int column = cMin + 1; column <= cMax; column++ )
{
aColumn = cm.getColumn ( column );
columnWidth = aColumn.getWidth ();
cellRect.width = columnWidth - columnMargin;
cellRect.x -= columnWidth;
if ( aColumn != draggedColumn )
{
paintCell ( g, cellRect, row, column );
}
}
}
}
// Paint the dragged column if we are dragging.
if ( draggedColumn != null )
{
paintDraggedArea ( g, rMin, rMax, draggedColumn, header.getDraggedDistance () );
}
// Remove any renderers that may be left in the rendererPane.
rendererPane.removeAll ();
}
protected void paintCell ( final Graphics g, final Rectangle cellRect, final int row, final int column )
{
if ( component.isEditing () && component.getEditingRow () == row &&
component.getEditingColumn () == column )
{
final Component editor = component.getEditorComponent ();
editor.setBounds ( cellRect );
editor.validate ();
}
else
{
final TableCellRenderer renderer = component.getCellRenderer ( row, column );
final Component prepareRenderer = component.prepareRenderer ( renderer, row, column );
rendererPane.paintComponent ( g, prepareRenderer, component, cellRect.x, cellRect.y, cellRect.width, cellRect.height, true );
}
}
protected void paintDraggedArea ( final Graphics g, final int rMin, final int rMax, final TableColumn draggedColumn,
final int distance )
{
final int draggedColumnIndex = viewIndexForColumn ( draggedColumn );
final Rectangle minCell = component.getCellRect ( rMin, draggedColumnIndex, true );
final Rectangle maxCell = component.getCellRect ( rMax, draggedColumnIndex, true );
final Rectangle vacatedColumnRect = minCell.union ( maxCell );
// Paint a gray well in place of the moving column.
g.setColor ( component.getBackground () );
g.fillRect ( vacatedColumnRect.x, vacatedColumnRect.y, vacatedColumnRect.width, vacatedColumnRect.height );
// Move to the where the cell has been dragged.
vacatedColumnRect.x += distance;
// Fill the background.
g.setColor ( component.getBackground () );
g.fillRect ( vacatedColumnRect.x, vacatedColumnRect.y, vacatedColumnRect.width, vacatedColumnRect.height );
// Paint the vertical grid lines if necessary.
if ( component.getShowVerticalLines () )
{
g.setColor ( component.getGridColor () );
final int x1 = vacatedColumnRect.x;
final int y1 = vacatedColumnRect.y;
final int x2 = x1 + vacatedColumnRect.width - 1;
final int y2 = y1 + vacatedColumnRect.height - 1;
// Left
g.drawLine ( x1 - 1, y1, x1 - 1, y2 );
// Right
g.drawLine ( x2, y1, x2, y2 );
}
for ( int row = rMin; row <= rMax; row++ )
{
// Render the cell value
final Rectangle r = component.getCellRect ( row, draggedColumnIndex, false );
r.x += distance;
paintCell ( g, r, row, draggedColumnIndex );
// Paint the (lower) horizontal grid line if necessary.
if ( component.getShowHorizontalLines () )
{
g.setColor ( component.getGridColor () );
final Rectangle rcr = component.getCellRect ( row, draggedColumnIndex, true );
rcr.x += distance;
final int x1 = rcr.x;
final int y1 = rcr.y;
final int x2 = x1 + rcr.width - 1;
final int y2 = y1 + rcr.height - 1;
g.drawLine ( x1, y2, x2, y2 );
}
}
}
protected int viewIndexForColumn ( final TableColumn aColumn )
{
final TableColumnModel cm = component.getColumnModel ();
for ( int column = 0; column < cm.getColumnCount (); column++ )
{
if ( cm.getColumn ( column ) == aColumn )
{
return column;
}
}
return -1;
}
/**
* Returns custom WebLaF tooltip provider.
*
* @return custom WebLaF tooltip provider
*/
protected ToolTipProvider getToolTipProvider ()
{
return component != null && component instanceof WebTable ? ( ( WebTable ) component ).getToolTipProvider () : null;
}
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