SWT实现右键菜单功能

小灰灰 2022-07-16 12:44 251阅读 0赞

右键菜单的代码与其他的menu代码类似，只是在初始化的时候给出不同的SWT的style。

import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.Shell; public class MenuTest \{ static Display display = new Display(); static Shell shell = new Shell(display); /\* \* 创建多级菜单, 采用SWT.CASCADE样式值可以加入子菜单,采用SWT.PUSH样式值不可以加入子菜单 \*/ public static void createMenu() \{ shell.setSize(500, 500); shell.setText("menu test window"); //shell.setImage(new Image(display, "images/Home.png")); // 通过shell对象和SWT.BAR样式值来创建一个菜单条 Menu menu = new Menu(shell, SWT.BAR); // 在菜单条的基础之上创建一个File的菜单 MenuItem file = new MenuItem(menu, SWT.CASCADE); file.setText("&File"); // 先在Shell上创建一个下拉框，然后将下拉框添加到File菜单上 Menu filemenu = new Menu(shell, SWT.DROP\_DOWN); file.setMenu(filemenu); // 在下拉框上创建菜单项Open final MenuItem openItem = new MenuItem(filemenu, SWT.CASCADE); openItem.setText("&Open"); // 在shell上创建一个下拉框,并把它加到open菜单上 Menu childmenu = new Menu(shell, SWT.DROP\_DOWN); openItem.setMenu(childmenu); // 在open菜单上创建一个子菜单child final MenuItem childItem = new MenuItem(childmenu, SWT.PUSH); childItem.setText("&Child"); // 在open菜单上创建一个子菜单dialog final MenuItem dialogItem = new MenuItem(childmenu, SWT.PUSH); dialogItem.setText("&Dialog"); // 在菜单项之间创建一个分隔符 new MenuItem(filemenu, SWT.SEPARATOR); // 在下拉框上创建菜单项Exit MenuItem exitItem = new MenuItem(filemenu, SWT.PUSH); exitItem.setText("&Exit"); // 设置edit菜单 MenuItem edit = new MenuItem(menu, SWT.CASCADE); edit.setText("&Edit"); Menu editmenu = new Menu(shell, SWT.DROP\_DOWN); edit.setMenu(editmenu); MenuItem cutItem = new MenuItem(editmenu, SWT.PUSH); cutItem.setText("&Cut/tCTRL+X"); // 设置快捷键 cutItem.setAccelerator(SWT.CTRL + 'X'); // 在菜单项之间创建一个分隔符 new MenuItem(editmenu, SWT.SEPARATOR); MenuItem copyItem = new MenuItem(editmenu, SWT.PUSH); copyItem.setText("&Copy/tCTRL+C"); // 设置快捷键 copyItem.setAccelerator(SWT.CTRL + 'C'); // 在菜单项之间创建一个分隔符 new MenuItem(editmenu, SWT.SEPARATOR); MenuItem pasteItem = new MenuItem(editmenu, SWT.PUSH); pasteItem.setText("&Paste/tCTRL+V"); // 设置快捷键 pasteItem.setAccelerator(SWT.CTRL + 'V'); // 设置window菜单 MenuItem window = new MenuItem(menu, SWT.CASCADE); window.setText("&Window"); Menu windowmenu = new Menu(shell, SWT.DROP\_DOWN); window.setMenu(windowmenu); final MenuItem maxItem = new MenuItem(windowmenu, SWT.PUSH); maxItem.setText("&Max"); // 在菜单项之间创建一个分隔符 new MenuItem(windowmenu, SWT.SEPARATOR); MenuItem minItem = new MenuItem(windowmenu, SWT.PUSH); minItem.setText("&Min"); // 设置help菜单 MenuItem help = new MenuItem(menu, SWT.CASCADE); help.setText("&Help"); Menu helpmenu = new Menu(shell, SWT.DROP\_DOWN); help.setMenu(helpmenu); MenuItem aboutItem = new MenuItem(helpmenu, SWT.PUSH); aboutItem.setText("&About"); // 添加一个option菜单，用于添加单选菜单和复选菜单 MenuItem option = new MenuItem(menu, SWT.CASCADE); option.setText("&Option"); Menu optionmenu = new Menu(shell, SWT.DROP\_DOWN); option.setMenu(optionmenu); MenuItem checkItem1 = new MenuItem(optionmenu, SWT.CHECK); checkItem1.setText("Check1"); MenuItem checkItem2 = new MenuItem(optionmenu, SWT.CHECK); checkItem2.setText("Check2"); // 设置默认为选中 checkItem2.setSelection(true); // 设置分隔符 new MenuItem(optionmenu, SWT.SEPARATOR); MenuItem radioItem1 = new MenuItem(optionmenu, SWT.RADIO); radioItem1.setText("Radio1"); // 设置默认为选中 radioItem1.setSelection(true); MenuItem radioItem2 = new MenuItem(optionmenu, SWT.RADIO); radioItem2.setText("Radio2"); // 为菜单添加相应的事件 childItem.addSelectionListener(new SelectionListener() \{ @Override public void widgetSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub Shell parent = (Shell) maxItem.getParent().getParent() .getParent(); Shell child = new Shell(parent, SWT.RESIZE | SWT.MAX); child.setText("child item has been clicked"); child.setImage(new Image(display, "images/Alert.png")); child.setSize(400, 100); child.open(); \} @Override public void widgetDefaultSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub \} \}); // 将菜单条添加到shell上 shell.setMenuBar(menu); // 弹出右键菜单 shell.setMenu(createEditPopup()); shell.open(); while (!shell.isDisposed()) \{ if (display.readAndDispatch()) \{ display.sleep(); \} \} display.dispose(); \} /\* \* 创建一个右键菜单 通过样式值SWT.POP\_UP来创建一个右键弹出菜单 \*/ public static Menu createEditPopup() \{ Menu popMenu = new Menu(shell, SWT.POP\_UP); MenuItem cutItem = new MenuItem(popMenu, SWT.PUSH); cutItem.setText("&Cut"); MenuItem copyItem = new MenuItem(popMenu, SWT.PUSH); copyItem.setText("&Copy"); MenuItem pasteItem = new MenuItem(popMenu, SWT.PUSH); pasteItem.setText("&Paste"); cutItem.addSelectionListener(new SelectionListener() \{ @Override public void widgetSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub System.out.println("cut"); \} @Override public void widgetDefaultSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub \} \}); pasteItem.addSelectionListener(new SelectionListener() \{ @Override public void widgetSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub System.out.println("paste"); \} @Override public void widgetDefaultSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub \} \}); copyItem.addSelectionListener(new SelectionListener() \{ @Override public void widgetSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub System.out.println("copy"); \} @Override public void widgetDefaultSelected(SelectionEvent arg0) \{ // TODO Auto-generated method stub \} \}); return popMenu; \} public static void main(String\[\] args) \{ MenuTest.createMenu(); \} \} 代码忘了是从谁的blog是弄来的了...