package Clases;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JTabbedPane;
public class ClosableTabbedPane extends JTabbedPane
{ private static final long serialVersionUID = 1L;
private TabCloseUI closeUI = new TabCloseUI(this);
public void paint(Graphics g) { super.paint(g);
this.closeUI.paint(g);
}
public void addTab(String title, Component component) { super.addTab(title + " ", component);
}
public String getTabTitleAt(int index)
{ return super.getTitleAt(index).trim();
}
public boolean tabAboutToClose(int tabIndex)
{ return true;
}
private class TabCloseUI
implements MouseListener, MouseMotionListener
{ private ClosableTabbedPane tabbedPane;
private int closeX = 0; private int closeY = 0; private int meX = 0; private int meY = 0;
private int selectedTab;
private final int width = 8; private final int height = 8;
private Rectangle rectangle = new Rectangle(0, 0, 8, 8);
private TabCloseUI() { }
public TabCloseUI(ClosableTabbedPane pane) { this.tabbedPane = pane;
this.tabbedPane.addMouseMotionListener(this);
this.tabbedPane.addMouseListener(this);
}
public void mouseEntered(MouseEvent me) { }
public void mouseExited(MouseEvent me) { }
public void mousePressed(MouseEvent me) { }
public void mouseClicked(MouseEvent me) { }
public void mouseDragged(MouseEvent me) { } public void mouseReleased(MouseEvent me) { if (closeUnderMouse(me.getX(), me.getY())) { boolean isToCloseTab = ClosableTabbedPane.this.tabAboutToClose(this.selectedTab);
if ((isToCloseTab) && (this.selectedTab > -1)) { this.tabbedPane.removeTabAt(this.selectedTab);
}
this.selectedTab = this.tabbedPane.getSelectedIndex();
} }
public void mouseMoved(MouseEvent me)
{ this.meX = me.getX();
this.meY = me.getY();
if (mouseOverTab(this.meX, this.meY)) { controlCursor();
this.tabbedPane.repaint();
}
}
private void controlCursor() { if (this.tabbedPane.getTabCount() > 0)
if (closeUnderMouse(this.meX, this.meY)) { this.tabbedPane.setCursor(new Cursor(12));
if (this.selectedTab > -1)
this.tabbedPane.setToolTipTextAt(this.selectedTab, "Close " + this.tabbedPane.getTitleAt(this.selectedTab));
}
else { this.tabbedPane.setCursor(new Cursor(0));
if (this.selectedTab > -1)
this.tabbedPane.setToolTipTextAt(this.selectedTab, "");
}
}
private boolean closeUnderMouse(int x, int y) { this.rectangle.x = this.closeX;
this.rectangle.y = this.closeY;
return this.rectangle.contains(x, y);
}
public void paint(Graphics g)
{ int tabCount = this.tabbedPane.getTabCount();
for (int j = 0; j < tabCount; j++)
if (this.tabbedPane.getComponent(j).isShowing()) { int x = this.tabbedPane.getBoundsAt(j).x + this.tabbedPane.getBoundsAt(j).width - 8 - 5;
int y = this.tabbedPane.getBoundsAt(j).y + 5;
drawClose(g, x, y);
break;
}
if (mouseOverTab(this.meX, this.meY))
drawClose(g, this.closeX, this.closeY);
}
private void drawClose(Graphics g, int x, int y)
{ if ((this.tabbedPane != null) && (this.tabbedPane.getTabCount() > 0)) { Graphics2D g2 = (Graphics2D)g;
drawColored(g2, isUnderMouse(x, y) ? Color.RED : Color.WHITE, x, y);
}
}
private void drawColored(Graphics2D g2, Color color, int x, int y) { g2.setStroke(new BasicStroke(5.0F, 1, 1));
g2.setColor(Color.BLACK);
g2.drawLine(x, y, x + 8, y + 8);
g2.drawLine(x + 8, y, x, y + 8);
g2.setColor(color);
g2.setStroke(new BasicStroke(3.0F, 1, 1));
g2.drawLine(x, y, x + 8, y + 8);
g2.drawLine(x + 8, y, x, y + 8);
}
private boolean isUnderMouse(int x, int y)
{ if ((Math.abs(x - this.meX) < 8) && (Math.abs(y - this.meY) < 8))
return true;
return false;
}
private boolean mouseOverTab(int x, int y) { int tabCount = this.tabbedPane.getTabCount();
for (int j = 0; j < tabCount; j++)
if (this.tabbedPane.getBoundsAt(j).contains(this.meX, this.meY)) { this.selectedTab = j;
this.closeX = (this.tabbedPane.getBoundsAt(j).x + this.tabbedPane.getBoundsAt(j).width - 8 - 5);
this.closeY = (this.tabbedPane.getBoundsAt(j).y + 5);
return true;
}
return false;
}
}
}
