SWT的GridData一些参数的图示

1. 参数；verticalSpan

GridData gridData=new GridData();
gridData.verticalSpan=100;

final Text nameText=new Text(shell, SWT.BORDER);
nameText.setLayoutData(gridData);

　　可以发现，verticalSpan代表的是控件占据的行数。

若代码如下：

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.verticalSpan=100;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

则效果如下：

2.参数： horizontalSpan

　　horizontalSpan代表的是：一个控件所占列数，默认一行包含1个位置，所以若将其设置为2时，这个控件会独占一行。

代码：

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.horizontalSpan=2;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

效果；

3.参数： grabExcessHorizontalSpace

　　这个参数只有true或false的选择，默认为false。他表示是否填充剩余的水平空间。

代码：

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.grabExcessHorizontalSpace=true;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

效果：

4. 参数： grabExcessVerticalSpace

    此参数表示控件是否填充垂直的剩余空间。

代码：

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.grabExcessVerticalSpace=true;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

效果：

5.参数： widthHint

　　这个参数的意思是控件的最小宽度，可以设定控件的宽度

代码；

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.widthHint=500;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

效果：

6.参数： heightHint

　　这个参数表示控件的最小高度。

代码：

public class LBMShow{
    public static void main(String args[]){
        final Display display=Display.getDefault();
        final Shell shell=new Shell(display);
        shell.setText("Hello");
        GridLayout gridLayout=new GridLayout(2, true);
        GridData gridData=new GridData();
        gridData.heightHint=500;
        shell.setLayout(gridLayout);
        
        
        final Label nameLabel=new Label(shell, SWT.BORDER);
        nameLabel.setText("name: ");
        final Text nameText=new Text(shell, SWT.BORDER);
        nameText.setText("1");
        nameLabel.setLayoutData(gridData);
        nameText.setLayoutData(gridData);
        
        final Label passwdLabel=new Label(shell, SWT.BORDER);
        passwdLabel.setText("password: ");
        final Text passwdText=new Text(shell, SWT.BORDER);
        passwdText.setText("2");
        
        final Button button = new Button(shell, SWT.NONE);
        button.setText("登录");
        //button.setBounds(32, 28, 58, 22);
        shell.open();
        //shell.layout();
        
         //消息循环
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }
}

效果：

7.参数；horizontalAlignment和verticalAlignment还没弄出来。

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原文地址：https://www.cnblogs.com/wangjiyuan/p/layout.html