Docs Help

Terms, Icons, and Labels Access Levels Member Types Member Syntax Member Flags Class Icons Member Icons Navigation and Features Class Member Quick-Nav Menu Getter and Setter Methods History Bar Search and Filters API Doc Class Metadata Expanding and Collapsing Examples and Class Members Desktop -vs- Mobile View Viewing the Class Source

Terms, Icons, and Labels

Many classes have shortcut names used when creating (instantiating) a class with a configuration object. The shortcut name is referred to as an alias (or xtype if the class extends Ext.Component). The alias/xtype is listed next to the class name of applicable classes for quick reference.

Access Levels

Framework classes or their members may be specified as private or protected. Else, the class / member is public. Public, protected, and private are access descriptors used to convey how and when the class or class member should be used.

Public classes and class members are available for use by any other class or application code and may be relied upon as a stable and persistent within major product versions. Public classes and members may safely be extended via a subclass.
Protected class members are stable public members intended to be used by the owning class or its subclasses. Protected members may safely be extended via a subclass.
Private classes and class members are used internally by the framework and are not intended to be used by application developers. Private classes and members may change or be omitted from the framework at any time without notice and should not be relied upon in application logic.

Member Types

Config - The configuration options for a class.
Property - Set once a class is instantiated. *See Read Only below.
Method - Actions that can be performed by a class. Methods should be read as instance methods and can only be called from a instance of a given class. Static methods that can be called directly from the class itself will have a static label next to the method name. *See Static below.
Event - Events are specific to the framework event system allowing for classes to programmatically raise an event to be handled by one or more event handler methods. DOM events, while handled by the framework event system, are not specifically described within the API documentation. *For DOM events refer to the event reference page from MDN.
Theme Variable - Variables used by the visual theme engine employed by the framework.
Theme Mixin - Functions used by the visual theme engine employed by the framework and may use values set in various Theme Variables.

Member Syntax

Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).

Ext.container.Container

view source

lookupComponent ( item ) : Ext.Component

protected

Called when a raw config object is added to this container either during initialization of the items config, or when new items are added), or {@link #insert inserted.

This method converts the passed object into an instanced child component.

This may be overridden in subclasses when special processing needs to be applied to child creation.

Parameters

item : Object

The config object being added.

Returns

Ext.Component

The component to be added.

Let's look at each part of the member row:

Expand/Collapse - On the left-hand size of the member row is a control used to expand and collapse each member row to show / hide member details.
Member Name - The name of the class member (lookupComponent in this example)
Method Param - Any required or optional params used by a method (or passed to an event handler method) will be listed next to the method name within parenthesis (( item ) in this example)
Return type - The class instance or javascript object returned by the method or property (Ext.Component in this case). This may be omitted for methods that do not return anything other than undefined or may display as multiple possible values separated by a forward slash / signifying that what is returned may depend on the results of the method call (i.e. a method may return a Component if a get method calls is successful or false if unsuccessful which would be displayed as Ext.Component/Boolean).
Flags - Any flags applicable to the member will be displayed next (PROTECTED in this example - see the Flags section below)
Member Origin - On the right-hand side of the member row is the class where the member was initially described (Ext.container.Container in this example). The source class will be displayed as a blue link if the member originates from the current class and gray if it is inherited from an ancestor or mixed-in class.
Member Source - On the right-hand side below the member origin class is a link to view the member's source (view source in the example)
Params List - Each param for a class method will be listed using the same name found above in parenthesis, the type of class or object expected, and a description of the param (item : Object in the example).
Returns - If a class returns a value other than undefined a "Returns" section will note the type of class or object returned and a description (Ext.Component in the example)
Since (not shown in the example) - Some members will show which version of the product the member was first introduced (i.e. Available since 3.4.0 - not pictured in the example) just after the member description
Default (not shown in the example) - Configs often show the default config value to be applied to a class instance if not overridden (i.e. Defaults to: false)

Member Flags

The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.

Required - Required config when instantiating a class
Bindable - The config has a setter which allows this config to be set via ViewModel binding
Read Only - The property may be read, but cannot be used to configure / re-configure a class instance at runtime
Singleton - Singleton classes are instantiated immediately once defined and may not be instantiated manually
Static - A static method or property is a method or property belonging to the class itself, not an instance of the class
Chainable - Refers to methods that return the class instance back when called.
This enables chained method calls like: classInstance.method1().method2().etc();
Deprecated - A class or member that is scheduled for removal in a future framework version and is provided in the current version for backwards compatibility.
Deprecated classes and members will have a message directing you to the preferred class / method going forward.
Removed - A removed class or member that exists in documentation only as a reference for users upgrading between framework versions
Template - A method defined within a base class designed to be overridden by subclasses
Abstract - A class or member may be be defined as abstract. Abstract classes and members establish a class structure and provide limited, if any, code. Class-specific code will be furnished via overrides in subclasses.
Preventable - Events marked preventable will not fire if false is returned from an event handler

Class Icons

- Indicates a framework class

- A singleton framework class. *See the singleton flag for more information

- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)

- Indicates that the class, member, or guide is new in the currently viewed version

Member Icons

- Indicates a class member of type config

- Indicates a class member of type property

- Indicates a class member of type method

- Indicates a class member of type event

- Indicates a class member of type theme variable

- Indicates a class member of type theme mixin

- Indicates that the class, member, or guide is new in the currently viewed version

Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.

Getter and Setter Methods

Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.

History Bar

Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.

Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.

If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.

Search and Filters

Both API docs and guides can be searched for using the search field at the top of the page.

On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.

The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.

Clicking on an empty search field will show your last 10 searches for quick navigation.

API Doc Class Metadata

Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:

Alternate Name - One or more additional class name synonymns (in Ext JS 6.0.0 the Ext.button.Button class has an alternate class name of Ext.Button). Alternate class names are commonly maintained for backward compatibility.
Hierarchy - The hierararchy view lists the inheritance chain of the current class up through its ancestor classes up to the root base class.
Mixins - A list of classes that are mixed into the current class
Inherited Mixins - A list of classes that are mixed into an ancestor of the current class
Requires - All classes required to be defined for the class to be instantiated
Uses - A list of classes potentially used by the class at some point in its lifecycle, but not necessarily requried for the class to initially be instantiated
Subclasses - Classes that extend the current class

Expanding and Collapsing Examples and Class Members

Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.

Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.

Desktop -vs- Mobile View

Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:

Global navigation will be located in a menu on the left-hand side accessible via the hamburger menu icon. The menu houses the following (on most pages):
- The name of the current product (as a link to the product landing page)
- The Sencha icon used to navigate back to the documentation home page
- The product menu drop-down button
- Tabs of navigation trees for the API docs and guides
Current context navigation and tools is located on the right-hand side accessible via the gear icon. The context menu houses teh following:
- The global search input field
- (API doc) A "Filters" tab with the member filter, expand / collapse all examples button, expand / collapse all member rows button, the access level filter checkboxes, and the counts of each member
- (API doc) A "Related Classes" tab containing the menu of metadata related to the current class
- (Guides) The table of contents for the guide

Viewing the Class Source

The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.

GXT 3.x

Show private classes

top

Horizontal Layout Container

A layout container that lays out its children in a row.

Reference

See more on the GXT Layout Containers.
See more on Layout Concepts and sizing layouts work.
com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer Javadoc

Demo

Horizontal Layout Container Demo

Sizing

It is important to note the container must be given a size to work properly.

Give a size by assigning the size directly to the child HorizontalLayoutContainer like using the hlc.setPixelSize(600, 600);
Give a size to the child HorizontalLayoutContainer by adding the child to a parent container that has a size and extends com.sencha.gxt.widget.core.client.container.ResizeContainer.
See more Resize Containers.

Horizontal layout data

Provides the child with a size.

HorizontalLayoutData method signature:

  new HorizontalLayoutData(double width, double height);

HorizontalLayoutData method signature with margins:

  new HorizontalLayoutData(double width, double height,
      new Margins(int top, int right, int bottom, int left));

Horizontal layout data

The layout takes the available space it has, subtracts all the fixed pixel sizes and -1 widget sizes, then divides up the rest by percentages. If the parameter is a double it will be a percentage. If it is larger than one, it be represented as pixels.

0.0 to 1.0 defines the size in percentage. Or 0% to 100%.

  new HorizontalLayoutData(.5, .75) // .5 == 50%, .75 == 75%
  new HorizontalLayoutData(.3, 1) // .3 == 30%, 1 == 100%

> 1 defines the size as pixels.

  new HorizontalLayoutData(100, 200) // 100px by 200px

-1 will not size the child, use will use it's natural size. See alternative containers.
```
  new HorizontalLayoutData(1, -1) // sets the height to -1
```

Child layout sizes

When expecting a child to be sized it is good to keep some notes on how a child can get the size.

When both dimensions are set to -1, no sizes are sent to the children.
When only one dimension is set, sizes are sent to the children for only that dimension.
In general if both x and y are -1 means the parent will not send the child a size.
In general if both x and y are -1 means the parent will not send the child a resize event.
In general if both x and y are -1 means the parent will not size the child and if the child expects a size it must be given, as for the HorizontalLayoutContainer and VerticalLayoutContainer.

Child layout size examples

If a HorizontalLayoutContainer has another VerticalLayoutContainer or HorizontalLayoutContainer as a child, then it will need a size specified. It can be given by the parent or by the widget itself.

Good examples:

  hlc.add(vlc, new HorizontalLayoutData(1, .50)); // 100% width x 50% height

  hlc.add(vlc, new HorizontalLayoutData(1, 1)); // 100% width x 50% height

  hlc.add(vlc, new HorizontalLayoutData(100, 100)); // 100px width x 100px height

  VerticalLayoutContainer vlc = new VerticalLayoutContainer();
  vlc.setPixelSize(100, 100); // 100px width x 100px height
  hlc.add(vlc); // -1 HorizontalLayoutData would be -1 width x -1 height

  VerticalLayoutContainer vlc = new VerticalLayoutContainer();
  vlc.setPixelSize(100, 100);
  hlc.add(vlc);

Bad examples: (See alternative containers.)

  VerticalLayoutContainer vlc = new VerticalLayoutContainer();
  // vlc needs > vlc.setPixelSize(100, 100);
  hlc.add(vlc, new HorizontalLayoutData(1, -1)); // 100% width x -1

  VerticalLayoutContainer vlc = new VerticalLayoutContainer();
  // vlc needs > vlc.setPixelSize(100, 100);
  hlc.add(vlc));  // -1 width x -1 height

Alternative containers

When using -1 or pixel values for all child layout data. If you do all but one with a -1, and the last gets 1.0, that is the perfect case for HorizontalLayoutContainer. There are some other container options when using -1 that may fit the design better.

Scrolling

Activating scrolling using ScrollSupport.

Examples

Basic example

Example widget using the com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer turing out like the screenshot:

  import com.google.gwt.user.client.ui.IsWidget;
  import com.google.gwt.user.client.ui.Widget;
  import com.sencha.gxt.core.client.util.Margins;
  import com.sencha.gxt.widget.core.client.ContentPanel;
  import com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer;
  import com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData;

  public class HlcExample implements IsWidget {
    private HorizontalLayoutContainer hlc;

    @Override
    public Widget asWidget() {
      if (hlc == null) {
        // The HLC will size this, 150px width x 150px height
        ContentPanel cpA = new ContentPanel();
        cpA.setBorders(true);
        cpA.setHeading("A");

        // The HLC will size this, 75px width x 125px height
        ContentPanel cpB = new ContentPanel();
        cpB.setBorders(true);
        cpB.setHeading("B");

        // The HLC will size this, 100% width x 50% height
        ContentPanel cpC = new ContentPanel();
        cpC.setBorders(true);
        cpC.setHeading("C");

        // The HLC will *NOT* size this, -1 width x -1 height
        ContentPanel cpD = new ContentPanel();
        cpD.setBorders(true);
        cpD.setHeading("D");
        cpD.setPixelSize(25, 50);

        hlc = new HorizontalLayoutContainer();
        hlc.add(cpA, new HorizontalLayoutData(150, 150, new Margins(5, 5, 0, 0))); // 150px width x 150px height
        hlc.add(cpB, new HorizontalLayoutData(75, 125)); // 75px width x 125px height
        hlc.add(cpC, new HorizontalLayoutData(1, .50)); // 100% width x 50% height
        hlc.add(cpD); // -1 width x -1 height
      }
      return hlc;
    }
  }

UiBinder example

Example using the HorizontalLayoutContainer in a UiBinder.

Demo the HorizontalLayoutContainer with UiBinder
UiBinder xmlns import is required to use the com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer container:
```
  xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
```

Example using HorizontalLayoutContainer turning out like the screenshot:

  <!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
  <ui:UiBinder xmlns:ui="urn:ui:com.google.gwt.uibinder"
      xmlns:g="urn:import:com.google.gwt.user.client.ui"
      xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
      xmlns:core="urn:import:com.sencha.gxt.widget.core.client">

      <!-- No margins -->
      <ui:with type="com.sencha.gxt.core.client.util.Margins" field="margins">
          <ui:attributes top="0" right="0" bottom="0" left="0" />
      </ui:with>

      <!-- Top and Right margins 5px -->
      <ui:with type="com.sencha.gxt.core.client.util.Margins" field="marginsRL">
          <ui:attributes top="5" right="5" bottom="0" left="0" />
      </ui:with>

       <!-- HLC LayoutData for container A -->
      <ui:with
          type="com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData"
          field="hlcLayoutDataA">
          <!-- 150px width x 150px height AND top 5px margin, right 5px margin-->
          <ui:attributes width="150" height="150" margins="{marginsRL}" />
      </ui:with>

      <!-- HLC LayoutData for container B -->
      <ui:with
          type="com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData"
          field="hlcLayoutDataB">
          <!-- 75px width x 125px height -->
          <ui:attributes width="75" height="125" margins="{margins}" />
      </ui:with>

      <!-- HLC LayoutData for container C -->
      <ui:with
          type="com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer.HorizontalLayoutData"
          field="hlcLayoutDataC">
          <!-- 100% width x 50% height -->
          <ui:attributes width="1" height=".50" margins="{margins}" />
      </ui:with>

      <!-- HorizontalLayoutContainer -->
      <container:HorizontalLayoutContainer>
          <container:child layoutData="{hlcLayoutDataA}">
              <core:ContentPanel heading="A" />
          </container:child>
          <container:child layoutData="{hlcLayoutDataB}">
              <core:ContentPanel heading="B" />
          </container:child>
          <container:child layoutData="{hlcLayoutDataC}">
              <core:ContentPanel heading="C" />
          </container:child>
          <container:child>
              <core:ContentPanel heading="D" pixelSize="25,50" />
          </container:child>
      </container:HorizontalLayoutContainer>
  </ui:UiBinder>

Using the HLC with UiBinder and implementing IsWidget:

  import com.google.gwt.core.client.GWT;
  import com.google.gwt.uibinder.client.UiBinder;
  import com.google.gwt.user.client.ui.IsWidget;
  import com.google.gwt.user.client.ui.Widget;
  import com.sencha.gxt.widget.core.client.container.HorizontalLayoutContainer;

  public class HlcExampleWithUiBinder implements IsWidget {
    private static HlcExampleWithUiBinderUiBinder uiBinder = GWT.create(HlcExampleWithUiBinderUiBinder.class);

    interface HlcExampleWithUiBinderUiBinder extends UiBinder<HorizontalLayoutContainer, HlcExampleWithUiBinder> {
    }

    private HorizontalLayoutContainer hlc;

    @Override
    public Widget asWidget() {
      if (hlc == null) {
        hlc = uiBinder.createAndBindUi(this);
      }
      return hlc;
    }
  }

Contents

Terms, Icons, and Labels

Access Levels

Member Types

Member Syntax

Member Flags

Class Icons

Member Icons

Navigation and Features

Class Member Quick-Nav Menu

Getter and Setter Methods

History Bar

Search and Filters

API Doc Class Metadata

Expanding and Collapsing Examples and Class Members

Desktop -vs- Mobile View

Viewing the Class Source

GXT 3.x

Horizontal Layout Container

Reference

Demo

Sizing

Horizontal layout data

Horizontal layout data

Child layout sizes

Child layout size examples

Alternative containers

Scrolling

Examples

Basic example

UiBinder example

GXT 3.x