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📜  GWT PopupPanel

📅  最后修改于: 2021-01-02 12:40:04             🧑  作者: Mango

GWT PopupPanel

可以选择在GWT PopupPanel后面显示“玻璃”元素，该元素通常用于使它后面的窗口小部件变灰。可以使用setGlassEnabled(boolean)启用它。它具有默认样式名称“ gwt-PopupPanelGlass”，可以使用setGlassStyleName(String)进行更改。

GWT PopupPanel类声明

让我们看一下com.google.gwt.user.client.ui.PopupPanel类的声明。

public class PopupPanel extends SimplePanel

GWT PopupPanel嵌套类

Class Description
PopupPanel.AnimationType It is the type of animation to use when opening the popup.
PopupPanel.PositionCallback It is a callback that is used to set the position of a PopupPanel right before it is shown.
PopupPanel.ResizeAnimation It is used to enlarge the popup into view.

GWT PopupPanel构造函数

Constructor Description
PopupPanel() It creates an empty popup panel.
PopupPanel(boolean autoHide) It creates an empty popup panel, specifying its “auto-hide” property.
PopupPanel(boolean autoHide, boolean modal) It creates an empty popup panel, specifying its “auto-hide” and “modal” properties.

GWT PopupPanel常用方法

Modifier and Types Method Description
void addAutoHidePartner(Element partner) It is a mouse events that occur within an autoHide partner will not hide a panel set to autoHide.
void center() It centers the popup in the browser window and shows it.
PopupPanel.AnimationType getAnimationType() It get the type of animation to use when opening and closing the popup.
protected Element getContainerElement() It override this method to specify that an element other than the root element be the container for the panel’s child widget.
protected Element getGlassElement() It get the glass element used by this PopupPane
int getOffsetHeight() It gets the panel’s offset height in pixels.
int getOffsetWidth() It gets the panel’s offset width in pixels.
void hide() It hides the popup and detaches it from the page.
void hide(boolean autoClosed) It hides the popup and detaches it from the page.
boolean isAnimationEnabled() It returns true if animations are enabled, false if not.
boolean isModal() It returns true if keyboard or mouse events that do not target the PopupPanel or its children should be ignored.
boolean isPreviewingAllNativeEvents() It returns true if the popup should preview all native events, even if the event has already been consumed by another popup.
void setModal(boolean modal) When the popup is modal, keyboard or mouse events that do not target the PopupPanel or its children will be ignored.
void setAnimationType(PopupPanel.AnimationType type) It set the type of animation to use when opening and closing the popup.

GWT PopupPanel示例1

//SamplePopupPanel.java


import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.DecoratorPanel;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.RootPanel;

public class MyPopup extends DialogBox {
  interface MyPopupUiBinder extends UiBinder {}
  private static MyPopupUiBinder uiBinder = GWT.create(MyPopupUiBinder.class);

  public MyPopup() {
    super(false, true);
    
    setWidget(uiBinder.createAndBindUi(this));
    
    setGlassEnabled(true);
  }
}

//SamplePopupPanel.css

.gwt-PopupPanelGlass {
  opacity:0.3;
  filter:alpha(opacity=30);
  background-color: grey;
}

输出：

GWT PopupPanel示例2

//SamplePopupPanel.java


import com.extjs.gxt.ui.client.event.ButtonEvent;
import com.extjs.gxt.ui.client.event.SelectionListener;
import com.extjs.gxt.ui.client.widget.Window;
import com.extjs.gxt.ui.client.widget.button.Button;
import com.extjs.gxt.ui.client.widget.form.FormPanel;
import com.extjs.gxt.ui.client.widget.form.HtmlEditor;
import com.extjs.gxt.ui.client.widget.form.TextField;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;
import com.extjs.gxt.ui.client.widget.layout.FormData;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;

public class Popup implements EntryPoint {

  public void onModuleLoad() {
    final Window w = new Window();
    w.setPlain(true);
    w.setSize(500, 300);
    w.setHeading("Resize Me");
    w.setLayout(new FitLayout());

    FormPanel panel = new FormPanel();
    panel.setBorders(false);
    panel.setBodyBorder(false);
    panel.setLabelWidth(55);
    panel.setPadding(5);
    panel.setHeaderVisible(false);

    TextField field = new TextField();
    field.setFieldLabel("Sent To");
    panel.add(field, new FormData("100%"));

    field = new TextField();
    field.setFieldLabel("Subject");
    panel.add(field, new FormData("100%"));

    HtmlEditor html = new HtmlEditor();
    html.setHideLabel(true);
    panel.add(html, new FormData("100% -53"));

    w.addButton(new Button("Send"));
    w.addButton(new Button("Cancel"));
    w.add(panel);

    Button b = new Button("Open", new SelectionListener() {

      @Override
      public void componentSelected(ButtonEvent ce) {
        w.show();
      }

    });
    RootPanel.get().add(b);

  }
}

输出：