Here you can find the source of showPopupMenu(JPopupMenu popup, Component comp, int x, int y)
| Parameter | Description |
|---|---|
| popup | The popup menu |
| comp | The component to show it for |
| x | The x co-ordinate |
| y | The y co-ordinate taken from jEdit 4.0pre1 |
public static void showPopupMenu(JPopupMenu popup, Component comp, int x, int y)
//package com.java2s; /*//from w w w.ja v a 2s. c om * GraphicUtils.java - SEdit, a tool to design and animate graphs in MadKit * Copyright (C) 1998-2002 Jacques Ferber, Olivier Gutknecht * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more * details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ import java.awt.*; import javax.swing.*; public class Main { /** * Shows the specified popup menu, ensuring it is displayed within the * bounds of the screen. * * @param popup * The popup menu * @param comp * The component to show it for * @param x * The x co-ordinate * @param y * The y co-ordinate taken from jEdit 4.0pre1 */ public static void showPopupMenu(JPopupMenu popup, Component comp, int x, int y) { showPopupMenu(popup, comp, x, y, true); } /** * Shows the specified popup menu, ensuring it is displayed within the * bounds of the screen. * * @param popup * The popup menu * @param comp * The component to show it for * @param x * The x co-ordinate * @param y * The y co-ordinate * @param point * If true, then the popup originates from a single point; * otherwise it will originate from the component itself. This * affects positioning in the case where the popup does not fit * onscreen. Taken from jEdit 4.0 */ public static void showPopupMenu(JPopupMenu popup, Component comp, int x, int y, boolean point) { int offsetX = 0; int offsetY = 0; int extraOffset = (point ? 1 : 0); Component win = comp; while (!(win instanceof Window || win == null)) { offsetX += win.getX(); offsetY += win.getY(); win = win.getParent(); } if (win != null) { Dimension size = popup.getPreferredSize(); Rectangle screenSize = win.getGraphicsConfiguration().getBounds(); if (x + offsetX + size.width + win.getX() > screenSize.width && x + offsetX + win.getX() >= size.width) { if (point) x -= (size.width + extraOffset); else x = (win.getWidth() - size.width - offsetX + extraOffset); } else { x += extraOffset; } if (y + offsetY + size.height > win.getHeight() && y + offsetY >= size.height) { if (point) y = (win.getHeight() - size.height - offsetY + extraOffset); } else { y += extraOffset; } popup.show(comp, x, y); } else popup.show(comp, x + extraOffset, y + extraOffset); } }