SWT(JFace)体验之RowLayout布局
RowLayout布局
相对于FillLayout来说,RowLayout比较灵活,功能也比较强。用户可以设置布局中子元素的大小、边距、换行及间距等属性。
RowLayout的风格
RowLayout中可以以相编程客栈关的属性设定布局的风格,用户可以通过“RowLayout.属性”的方式设置RowLayout的布局风格,RowLayout中常用的属性如下。
Wrap:表示子组件是否可以换行(true为可换行)。Pack:表示子组件是否为保持原有大小(true为保持原有大小)。Justify:表示子组件是否根据父组件信息做调整。MarginLeft:表示当前组件距离父组件左边距的像素点个数。MarginTop:表示当前组件距离父组件上边距的像素点个数。MarginRight:表示当前组件距离父组件右边距的像素点个数。MarginBottom:表示当前组件距离父组件下边距的像素点个数。Spacing:表示子组件之间的间距像素点个数。另外,RowLayout可以通过RowData设置每个子组件的大小,例如“button.setLayoutData (new RowData(60, 60))”将设置button的大小为(60,60)。
测试代码: 复制代码 代码如下:package swt_jface.demo2; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.RowData; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.List; import org.eclipse.swt.widgets.Shell; public class RowLayoutSwww.devze.comample { Display display = new Display(); Shell shell = new Shell(display); public RowLayoutSample() { RowLayout rowLayout = new RowLayout(); // rowLayout.fill = true; // rowLayout.justify = true; // rowLayout.pack = false; // rowLayout.ty编程客栈pe = SWT.VERTICAL; // rowLayout.wrap = false; shell.setLayout(rowLayout); Button button1 = new Button(shell, SWT.PUSH); button1.setText("button1"); button1.setLayoutData(new RowData(100, 35)); List list = new List(shell, SWT.BORDER); list.add("item 1"); list.add("item 2"); list.add("item 3"); Button button2 = new Button(shell, SWT.PUSH); button2.setText("button #2"); //shell.setSize(120, 120); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new RowLayoutSample开发者_JS培训(); } }再看看下面这个动态的(结合Composite) 复制代码 代码如下:package swt_jface.demo2; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class Layouting { Display display = new Display(); Shell shell = new Shell(display); int count = 0; public Layouting() { shttp://www.devze.comhell.setLayout(new RowLayout()); final Composite composite = new Composite(shell, SWT.BORDER); composite.setLayout(new RowLayout()); composite.setBackground(display.getSystemColor(SWT.COLOR_YELLOW)); composite.addControlListener(new ControlListener() { public void controlMoved(ControlEvent e) { } public void controlResized(ControlEvent e) { System.out.println("Composite resize."); } }); Button buttonAdd = new Button(shell, SWT.PUSH); buttonAdd.setText("Add new button"); buttonAdd.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { Button button = new Button(composite, SWT.PUSH); button.setText("Button #" + (count++)); composite.layout(true); composite.pack(); shell.layout(true); shell.pack(true); } }); shell.pack(); //http://www.devze.comshell.setSize(450, 100); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); } public static void main(String[] args) { new Layouting(); } }
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