在Eclipse RCP 设置表格的行高、背景颜色以及字体等等

    基于RCP平台写程序的时候，经常遇到需要设置table行高的问题。Table和TableItem以及TableViewer类中都没有相应的方法可用。于是综合了一下网友的智慧，找到了几个设置表格控件行高的方法

    第一种，通过设置指定height的Image来改变行高，代码演示如下：

Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 200, 250);
Table table = new Table(shell, SWT.NONE);
table.setBounds(10, 10, 150, 200);
table.setLinesVisible(true);
int rowHeight =30;

TableItem item1 =new TableItem(table, SWT.NONE);
item1.setText("item 1");
TableItem item2 =new TableItem(table, SWT.NONE);
item2.setText("item 2");
TableItem item3 =new TableItem(table, SWT.NONE);
item3.setText("item 3");

Image image = new Image(display, 1, rowHeight);
item1.setImage(image);
shell.open();
while (!shell.isDisposed()) {
    if (!display.readAndDispatch())
        display.sleep();
    }
display.dispose();

Display display = new Display(); Shell shell = new Shell(display); shell.setBounds(10, 10, 200, 250); Table table = new Table(shell, SWT.NONE); table.setBounds(10, 10, 150, 200); table.setLinesVisible(true); int rowHeight =30; TableItem item1 =new TableItem(table, SWT.NONE); item1.setText("item 1"); TableItem item2 =new TableItem(table, SWT.NONE); item2.setText("item 2"); TableItem item3 =new TableItem(table, SWT.NONE); item3.setText("item 3"); Image image = new Image(display, 1, rowHeight); item1.setImage(image); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose();
不过就算我只在item1上setImage，item2和item3行高也会一起改变，没法单独指定某一行的高度。

        第二种，是通过捕获SWT.MeasureItem事件来定制单元格的高度和宽度，具体内容可参看原文Custom Drawing Table and Tree Items，代码演示如下：

Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 200, 250);
final Table table = new Table(shell, SWT.NONE);
table.setBounds(10, 10, 150, 200);
table.setLinesVisible(true);
final int rowHeight =30;

for (int i = 0; i < 5; i++) {
    new TableItem(table, SWT.NONE).setText("item " + i);
}

table.addListener(SWT.MeasureItem, new Listener() {
    public void handleEvent(Event event) {
        event.height =rowHeight;
    }
});

shell.open();
while (!shell.isDisposed()) {
    if (!display.readAndDispatch())
    display.sleep();
}
display.dispose();

Display display = new Display(); Shell shell = new Shell(display); shell.setBounds(10, 10, 200, 250); final Table table = new Table(shell, SWT.NONE); table.setBounds(10, 10, 150, 200); table.setLinesVisible(true); final int rowHeight =30; for (int i = 0; i < 5; i++) { new TableItem(table, SWT.NONE).setText("item " + i); } table.addListener(SWT.MeasureItem, new Listener() { public void handleEvent(Event event) { event.height =rowHeight; } }); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose();

        同样的，这个方法也不能为每一行指定不同的行高，在原文中也说了"All items in a table have the same height, so increasing the height of a cell will result in the height of all items in the table growing accordingly."。看来这一点在SWT中是做不到了。