SWT复合对齐

Question

我想知道SWT Composite对象的常规/常用做法是什么.

我发现每当我添加一个Composite(带有任何UI示例:TextBox或Button)时,在Composite中创建的UI不会与Composite的起始边缘对齐.(您可以通过设置Composite的背景颜色来观察)

在TextBox UI之前,Composite内部有一些空格/填充.如果未在Composite中创建先前的UI,则会导致我正在创建的GUI表单中的未对齐.

我想知道使它们对齐的常见做法是什么？通过设置一些负填充来向后移动Composite,使其中的UI看起来像是对齐的？

示例代码如下!

public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        GridLayout layout = new GridLayout();
        layout.numColumns = 1;
        layout.makeColumnsEqualWidth = false;
        shell.setLayout(layout);

        Text t1 = new Text(shell, SWT.SINGLE | SWT.BORDER);
        t1.setText("Test box...");

        Composite c = new Composite(shell, SWT.NONE);
        // c.setBackground(new Color(shell.getDisplay(), 255,0,0));
        layout = new GridLayout();
        layout.numColumns = 2;
        layout.makeColumnsEqualWidth = true;
        c.setLayout(layout);

        Text t2 = new Text(c, SWT.SINGLE | SWT.BORDER);
        t2.setText("Test box within Composite... not aligned to the first textbox");

        Button b = new Button(c, SWT.PUSH);
        b.setText("Button 1");

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

Answer 1

这将解决它:

public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout(1, false));

    Text t1 = new Text(shell, SWT.SINGLE | SWT.BORDER);
    t1.setText("Test box...");

    Composite c = new Composite(shell, SWT.NONE);
    GridLayout layout = new GridLayout(2, true);

    layout.marginWidth = 0; // <-- HERE

    c.setLayout(layout);

    Text t2 = new Text(c, SWT.SINGLE | SWT.BORDER);
    t2.setText("Test box within Composite... not aligned to the first textbox");

    Button b = new Button(c, SWT.PUSH);
    b.setText("Button 1");

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

只需设置marginWidthif GridLayoutto 0.

只是一个提示:您可以在构造函数中设置列数和等宽度GridLayout.