package com.swtjface.Ch4;
import org.eclipse.jface.action.*;
import org.eclipse.jface.resource.*;
public class Ch4_StatusAction extends Action
{
StatusLineManager statman;
short triggercount = 0;
public Ch4_StatusAction(StatusLineManager sm)
{
super("&Trigger@Ctrl+T", AS_PUSH_BUTTON);//在T字母之前çš?amp;½W¦å·æ„å‘³ç€˜q™ä¸ªå­—母ž®†ä½œä¸ø™¯¥åŠ¨ä½œçš„快捷键。而在TEXT领域内的“Ctrl+T”确保了当用户在同时按下Ctrl键和T键时该动作就ä¼?x¨¬)被‹È€å‘ã€?/font>
statman = sm;
setToolTipText("Trigger the Action");
setImageDescriptor(ImageDescriptor.createFromFile
(this.getClass(),"eclipse.gif"));
}
public void run() //每次当Ch4_StatusAction被生成，run()æ–ÒŽ(gu¨©)³•ž®Þp¢«è°ƒç”¨
{
triggercount++;
statman.setMessage("The status action has fired. Count: " +
triggercount);
}

ActionContributionItem aci = new ActionContributionItem(status_action); //ç”?font face="Verdana" size="2">Ch4_StatusAction的对象作参数åQŒåˆ›å»ÞZº†ActionContributionItem对象

public Ch4_Contributions() {

super(null); // 创徏�/font> ApplicationWindow对象

aci.fill(parent); // ž®†ActionContributionItem攑֜¨GUI中。因ä¸ø™¿™é‡Œçš„参数是Composite对象åQŒæ‰€ä»¥æ ¹æ®Actionçš„STYLE属性来¼‹®å®šã€‚此处是ButtonåQŒå› ä¸?font color="#0000ff">Ch4_StatusAction çš„STYLE属性是AS_PUSH_BUTTON;

return parent;

}

public static void main(String[] args) {

Ch4_Contributions swin = new Ch4_Contributions();

swin.setBlockOnOpen(true);

swin.open();

Display.getCurrent().dispose();

}

protected MenuManager createMenuManager() {

MenuManager main_menu = new MenuManager(null);

MenuManager action_menu = new MenuManager("Menu");

main_menu.add(action_menu);

action_menu.add(status_action); //å…Œ™”status_action.created and added to the menu in the form of a menu item

return main_menu;

}

protected ToolBarManager createToolBarManager(int style) {

ToolBarManager tool_bar_manager = new ToolBarManager(style);

tool_bar_manager.add(status_action); //å…Œ™”status_action。created and added to the toolbar as a toolbar item.

return tool_bar_manager;

}

protected StatusLineManager createStatusLineManager() {

return slm;

}

}

• Interfacing with contributions

两个途径来将ActionContributionItemæ·ÕdŠ åˆ°GUIåQ?br />1. 通过ContributionManager子类的add()æ–ÒŽ(gu¨©)³•ã€?br />åQ?åQ‰å¯æŽ¥å—Action对象的参敎ͼŒä»Žè€Œé—´æŽ¥çš„ž®†ContributionItemå’ŒContributionManagerå…Œ™”。可多次执行
åQ?åQ‰å¯ç›´æŽ¥æŽ¥å—ActionContributionItem对象的参数。只可执行一‹Æ?br />2.通过ActionContributionItem¾cȝš„fill()æ–ÒŽ(gu¨©)³•ã€‚根据其参数的不同，所先是的组件也不同åQŒå…·ä½“见下表åQ?br />

• Exploring the Action class

Important methods of the Action class


Property methods for the Action class

DESCRIPTION--written to a status line to provide additional help.

Style methods for the Action class

如果ENABLED是FALSEåQŒåˆ™å˜ç°ã€‚CHECKED主要用于radioå’Œcheckbox

Accelerator key / keyboard methods for the Action class

Accelerator keys--鼠标点击的键盘块æäh–¹å¼?/font>

Listener methods for the Action class

虽然JFace使用action代替了SWTçš„listener/event机制åQŒä½†æ˜¯Actiono¾cÖM»ç„¶å¯ä»¥å’Œlistener协作来处理特定需求的事äšgã€?br />IPropertyChangeListener接口å…Ïx³¨å®¢æˆ·è‡ªå®šä¹‰çš„PropertyChangeEvents,当所¾l™çš„对象按照你所¾l™çš„方式变成另一个对象时åQŒæ­¤äº‹äšg被触发ã€?br />
Miscellaneous methods of the Action class

ž®ç¬¼é¦’头 2006-03-24 17:02 发表评论

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