1.有的時(shí)候在project的java build path中定義好了一些jar包依賴,但是project在運(yùn)行的時(shí)候仍然報(bào)NoClassDef的錯(cuò)誤.這是因?yàn)閜roject的MANIFEST.MF文件沒(méi)有更新.手動(dòng)在MANIFEST.MF加上那些jar包就可以了.
2.Plugin A 依賴 Plugin B.B也把相應(yīng)的package export出來(lái)了,但是A還是找不到B里面定義的類.修改A的MANIFEST.MF文件,在dependence tab里去掉Plugin B,再添加B.此時(shí)發(fā)現(xiàn)有5,6個(gè)同樣的Plugin B出現(xiàn)在選擇plugin的list中.cancel 掉該對(duì)話框,然后重啟eclipse,在A的dependence里面重新加上B,問(wèn)題解決.
3.當(dāng)我們通過(guò)在plugin.xml中用extension的方式定義action的時(shí)候,你會(huì)發(fā)現(xiàn)你定義的actionset和action在GUI出現(xiàn)的順序不是你可以控制的,就是說(shuō)同一個(gè)actionset下的多個(gè)action不是按你定義的先后順序出現(xiàn)在程序的界面上的,這樣對(duì)action進(jìn)行排序呢?其實(shí)仔細(xì)觀察一下,你會(huì)發(fā)現(xiàn)action在GUI出現(xiàn)的順序是和你定義action的順序相反的,比如你先后定義了3個(gè)action A,B,C,那么你就會(huì)在GUI上看見(jiàn)action的順序是C,B,A.如果你定義了多個(gè)actionset,你會(huì)發(fā)現(xiàn)這個(gè)規(guī)律不適用與actionset,actionset在界面上出現(xiàn)的順序其實(shí)是和它的id的排序相反的.比如你定義了三個(gè)actionset,它們的id分別是:seta,setb,setc,你會(huì)發(fā)現(xiàn)GUI上出現(xiàn)的順序是setc,setb,seta
4.雙擊激活TreeViewer的celleditor
JFace的Viewer都有單元格編輯功能,但是celleditor默認(rèn)的實(shí)現(xiàn)是單擊激活editor,雙擊選中item.如果需要改成單擊選中item,雙擊激活editor呢?Eclipse的官網(wǎng)上好像也有人問(wèn)到這個(gè)問(wèn)題,不過(guò)目前好像是開(kāi)了一個(gè)bug,期待eclipse的下個(gè)版本解決這個(gè)問(wèn)題.但最近找到了一個(gè)用SWT來(lái)解決這個(gè)問(wèn)題的方法:
Tree tree=treeViewer.getTree();
final TreeEditor editor = new TreeEditor(tree);
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
// Use a mouse listener, not a selection listener, because you're
// interested
// in the selected column as well as row
tree.addMouseListener(new MouseAdapter() {
public void mouseDoubleClick(MouseEvent event) {
final TreeItem item = tree.getSelection()[0];
// Create a text field to do the editing
final Text text = new Text(tree, SWT.NONE);
text.setText(item.getText());
text.selectAll();
text.setFocus();
text.addFocusListener(new FocusAdapter() {
public void focusLost(FocusEvent event) {
text.dispose();
}
});
// Set the text field into the editor
editor.setEditor(text, item);
}
});