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实现功能: 类似于windows xp中的快速按钮的风格, 允许指定按钮的状态是自弹起(就是鼠标键按下时按钮产生被按下的效果, 鼠标键抬起的时候按钮自动回复原状)着是开关按钮(点击一次, 按钮被按下, 再点击一次, 按钮被弹起), 并能够设定一组(多个)或多组互斥按钮(即同组中有且只有一个按钮一直处于被按下的状态). 当然, 这个类不是很完善, 有许多地方可以改进, 比如没有加入当按钮处于禁止使用的状态(disabled), 应该再引入一个image来显示成灰色的效果等. 您就自己改改吧. :) 程序代码: speedbutton.java -------------------------------- import javax.swing.*; import java.awt.*; import java.awt.event.*; public class speedbutton extends jbutton implements mouselistener { private boolean entered = false; /* 标志, 用于判断鼠标是否在按钮上 */ private boolean downed = false; /* 标志, 用于按钮是否被按下 */ private boolean enableddowned = false; /* 标志, 用于按钮是否允许被按下 */ private image image = null; private int groupid = 0; /* 指定按钮属于哪个互斥组, 取值为0时不判断 */ private int buttonid; /* 按钮本身的id号, 唯一 */ /** * 这个构造器有点烦, 这里可以进行优化成多个构造器来组合. * @see com.javax.swing.jbutton * @author delfan,2002.07.23 * @version 1.0 */ public speedbutton(int buttonid, image image, int width, int height, string tip, boolean enableddowned,boolean initmode, int groupid, actionlistener actionlistener) { this.buttonid = buttonid; this.image = image; addmouselistener(this); setpreferredsize(new dimension(width, height)); settooltiptext(tip); this.enableddowned = enableddowned; this.groupid = groupid; downed = initmode; addactionlistener(actionlistener); } public void paint(graphics g) { if (getsize().height == 2 || getsize().width == 2) { // 画分隔条, 当按钮宽度或高度为2的时候, g.setcolor(new color(119, 133, 168)); // 认为是分隔条 g.fillrect(0, 0, getwidth() - 1, getheight() - 1); g.setcolor(new color(129, 143, 178)); g.fillrect(1, 1, getwidth(), getheight()); setenabled(false); } else { if (entered) { // 鼠标在按钮内 g.setcolor(new color(119, 133, 168)); g.fillrect(0, 0, getwidth(), getheight()); g.setcolor(new color(8, 36, 107)); g.drawrect(0, 0, getwidth() - 1, getheight() - 1); if (image != null) g.drawimage(image, 2, 2, getparent()); } else { // 鼠标不在按钮内 g.setcolor(getparent().getbackground()); g.fillrect(0, 0, getwidth(), getheight()); if (image != null) g.drawimage(image, 2, 2, getparent()); } if (downed) { // 按钮被按下 g.setcolor(new color(181, 190, 214)); g.fillrect(0, 0, getwidth(), getheight()); g.setcolor(new color(8, 36, 107)); g.drawrect(0, 0, getwidth() - 1, getheight() - 1); if (image != null) g.drawimage(image, 3, 3, getparent()); } } } public void update(graphics g) {paint(g);} /** * 按钮是否处于按下状态 */ public boolean isdowned() {return downed;} /** * 取得按钮的组索引号 */ public int getgroupid() {return groupid;} public void setdowned(boolean downed) {this.downed = downed;repaint();} public void mouseentered(mouseevent e) {entered = true;repaint();} public void mouseexited(mouseevent e) {entered = false;repaint();} public void mouseclicked(mouseevent e) {} public void mousepressed(mouseevent e) { if (enableddowned && downed && groupid == 0) downed = false; else downed = true; repaint(); } public void mousereleased(mouseevent e) { if (!enableddowned) downed = false; repaint(); if (groupid != 0) // 通过存放按钮的容器进行互斥按钮的状态改变操作 for (int i = 0; i < getparent().getcomponentcount(); i++) if (getparent().getcomponent(i) instanceof speedbutton) { if (((speedbutton) getparent().getcomponent(i)).getgroupid() == groupid && ((speedbutton) getparent().getcomponent(i)) != this) ((speedbutton) getparent().getcomponent(i)).setdowned(false); } } public int getbuttonid() {return buttonid;} }
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