srcmini本文概述
在此布局面板中, 其所有子窗口小部件都位于角或边缘。最后一个窗口小部件占据中心空间。它也适用于HTML页面具有！DOCTYPE DECLARATION的标准模式。
GWT DockLayoutPanel类声明
让我们看看com.google.gwt.user.client.ui.DockLayoutPanel的声明
public class DockLayoutPanel extends ComplexPanelDockLayoutPanel嵌套类
| 类 | 描述 |
|---|---|
| DockLayoutPanel.Direction | 在addEast（Widget, double）等中使用它来指定子窗口小部件的添加方向。 |
| DockLayoutPanel.LayoutData | 其布局数据与每个小部件相关联。 |
GWT DockLayoutPanel构造函数
| 建设者 | 描述 |
|---|---|
| DockLayoutPanel(Style.Unit unit) | 它创建一个空的停靠面板。 |
DockLayoutPanel常用方法
| 修饰符和类型 | 方法 | 描述 |
|---|---|---|
| void | add(Widget widget) | 它在扩展坞的中心添加了一个小部件。 |
| void | addEast(IsWidget widget, double size) | 它是IsWidget的重载版本。 |
| void | addEast(Widget widget, double size) | 它将小部件添加到停靠区的东边缘。 |
| void | addLineEnd(Widget widget, double size) | 它将小部件添加到该行的末尾。 |
| void | addNorth(Widget widget, double size) | 它将小部件添加到扩展坞的北边缘。 |
| void | addSouth(Widget widget, double size) | 它将一个小部件添加到停靠区的南边缘。 |
| Element | getWidgetContainerElement(Widget child) | 它获取包装给定子控件的容器元素。 |
| 受保护的DockLayoutPanel.Direction | getResolvedDirection(DockLayoutPanel.Direction direction) | 它根据当前语言环境解析指定的方向。 |
| protected void | insert(Widget widget, DockLayoutPanel.Direction direction, double size, Widget before) | 它将小部件添加到停靠的指定边缘。 |
| protected void | onAttach() | 当窗口小部件附加到浏览器的文档时会调用它。 |
| protected void | onDetach() | 当窗口小部件从浏览器的文档中分离时, 将调用它。 |
| void | setWidgetHidden(Widget widget, boolean hidden) | 它设置是否应隐藏给定的小部件。 |
| void | setWidgetSize(Widget widget, double size) | 只要不是中央窗口小部件, 它就会更新传入的窗口小部件的大小, 并更新扩展坞的布局。 |
GWT DockLayoutPanel示例1
//SampleDockLayoutPanel.java
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.user.client.Window;
/*This is the entry point method. */
public void onModuleLoad() {
// Attach five widgets to a DockLayoutPanel, one in each direction. Lay // them out in ?em? units.
DockLayoutPanel p = new DockLayoutPanel(Unit.EM);
p.addNorth(new HTML("north"), 8);
p.addSouth(new HTML("south"), 8);
p.addEast(new HTML("east"), 8);
p.addWest(new HTML("west"), 8);
p.add(new HTML("center"));
// Attach the DockLayoutPanel to the RootLayoutPanel.
RootLayoutPanel rp = RootLayoutPanel.get(); rp.add(p);
}//SampleDockLayoutPanel.css
body {
text-align: center;
font-family: verdana, sans-serif;
}
h1 {
font-size: 2em;
font-weight: bold;
color: #777777;
margin: 40px 0px 70px;
text-align: center;
}
.dockpanel td {
border: 1px solid #BBBBBB;
padding: 3px;
}输出：
GWT DockLayoutPanel示例2
//SampleDockLayoutPanel.java
import com.google.gwt.core.client.EntryPoint;
import com.gwtext.client.core.Margins;
import com.gwtext.client.core.RegionPosition;
import com.gwtext.client.widgets.Panel;
import com.gwtext.client.widgets.Viewport;
import com.gwtext.client.widgets.layout.BorderLayout;
import com.gwtext.client.widgets.layout.BorderLayoutData;
import com.gwtext.client.widgets.layout.FitLayout;
public class Test implements EntryPoint {
public void onModuleLoad() {
Panel panel = new Panel();
panel.setBorder(false);
panel.setPaddings(15);
panel.setLayout(new FitLayout());
Panel borderPanel = new Panel();
borderPanel.setLayout(new BorderLayout());
//add north panel
Panel northPanel = new Panel();
northPanel.setHtml("<p>north panel</p>");
northPanel.setHeight(32);
northPanel.setBodyStyle("background-color:#FFFF88");
borderPanel.add(northPanel, new BorderLayoutData(RegionPosition.NORTH));
//add south panel
Panel southPanel = new Panel();
southPanel.setHtml("<p>south panel</p>");
southPanel.setHeight(100);
southPanel.setBodyStyle("background-color:#CDEB8B");
southPanel.setCollapsible(true);
southPanel.setTitle("South");
BorderLayoutData southData = new BorderLayoutData(RegionPosition.SOUTH);
southData.setMinSize(100);
southData.setMaxSize(200);
southData.setMargins(new Margins(0, 0, 0, 0));
southData.setSplit(true);
borderPanel.add(southPanel, southData);
//add east panel
Panel eastPanel = new Panel();
eastPanel.setHtml("<p>east panel</p>");
eastPanel.setTitle("East Side");
eastPanel.setCollapsible(true);
eastPanel.setWidth(225);
BorderLayoutData eastData = new BorderLayoutData(RegionPosition.EAST);
eastData.setSplit(true);
eastData.setMinSize(175);
eastData.setMaxSize(400);
eastData.setMargins(new Margins(0, 0, 5, 0));
borderPanel.add(eastPanel, eastData);
Panel westPanel = new Panel();
westPanel.setHtml("<p>west panel</p>");
westPanel.setTitle("West");
westPanel.setBodyStyle("background-color:#EEEEEE");
westPanel.setCollapsible(true);
westPanel.setWidth(200);
BorderLayoutData westData = new BorderLayoutData(RegionPosition.WEST);
westData.setSplit(true);
westData.setMinSize(175);
westData.setMaxSize(400);
westData.setMargins(new Margins(0, 5, 0, 0));
borderPanel.add(westPanel, westData);
Panel centerPanel = new Panel();
centerPanel.setHtml("<p>center panel</p>");
centerPanel.setBodyStyle("background-color:#C3D9FF");
borderPanel.add(centerPanel, new BorderLayoutData(RegionPosition.CENTER));
panel.add(borderPanel);
Viewport viewport = new Viewport(panel);
}
}输出：
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