net.sf.click.extras.control
Class AbstractContainerField

java.lang.Object
  net.sf.click.control.AbstractControl
      net.sf.click.control.Field
          net.sf.click.extras.control.AbstractContainerField

All Implemented Interfaces:

Serializable, Control, Container

public abstract class AbstractContainerField
extends Field
implements Container

Provides an abstract convenience class that implements Container and extend Field.

AbstractContainerField delegates Contain specific actions to an internal Container instance. You can access the Container instance through getContainer().

If you need to bind a request parameter to this fields value, please see bindRequestValue().

Here is an example of a Border Control that can wrap a Button and render a div border around it.

 public class ButtonBorder extends AbstractContainerField {
     public ButtonBorder(String name) {
         super(name);
     }

     public String getTag() {
         return "div";
     }

     public Control addControl(Button button) {
         return getContainer().addControl(button);
     }
 } 

Author:

Bob Schellink

See Also:

Serialized Form

Field Summary

protected AbstractContainer

container Internal container instance.

Fields inherited from class net.sf.click.control.Field

disabled, error, focus, form, help, label, readonly, required, tabindex, title, validate, value

Fields inherited from class net.sf.click.control.AbstractControl

actionListener, attributes, listener, listenerMethod, messages, name, parent, styles

Fields inherited from interface net.sf.click.Control

CONTROL_MESSAGES

Constructor Summary

AbstractContainerField()
Create a ContainerField with no name defined.

AbstractContainerField(String name)
Create a ContainerField with the given name.

Method Summary

Control	add(Control control)
void	bindRequestValue() This method does nothing by default.
boolean	contains(Control control)
Container	getContainer() Return the internal container instance.
Control	getControl(String controlName)
protected Map	getControlMap() Return the map of controls where each map's key / value pair will consist of the control name and instance.
List	getControls()
protected int	getControlSizeEst()
String	getHtmlImports() Return the HTML head import statements for contained controls.
boolean	hasControls() Returns true if this container has existing controls, false otherwise.
Control	insert(Control control, int index)
void	onDestroy()
void	onInit()
boolean	onProcess()
void	onRender()
boolean	remove(Control control)
void	render(HtmlStringBuffer buffer) By default render the container and all its child controls to the specified buffer.
protected void	renderChildren(HtmlStringBuffer buffer) Render this container children to the specified buffer.
protected void	renderContent(HtmlStringBuffer buffer) Render this container content to the specified buffer.
protected void	renderTagEnd(String tagName, HtmlStringBuffer buffer)
String	toString() Returns the HTML representation of this control.

Methods inherited from class net.sf.click.control.Field

getError, getErrorLabel, getFocus, getFocusJavaScript, getForm, getHelp, getId, getLabel, getRequestValue, getTabIndex, getTextAlign, getTitle, getValidate, getValidationJavaScript, getValue, getValueObject, getWidth, isDisabled, isHidden, isReadonly, isRequired, isValid, setDisabled, setError, setErrorMessage, setErrorMessage, setErrorMessage, setErrorMessage, setFocus, setForm, setHelp, setLabel, setListener, setReadonly, setRequired, setTabIndex, setTextAlign, setTitle, setValidate, setValue, setValueObject, setWidth, validate

Methods inherited from class net.sf.click.control.AbstractControl

addStyleClass, appendAttributes, getActionListener, getAttribute, getAttributes, getContext, getMessage, getMessage, getMessage, getMessages, getName, getPage, getParent, getStyle, getStyles, getTag, hasAttribute, hasAttributes, hasStyles, onDeploy, registerActionEvent, removeStyleClass, renderTagBegin, setActionListener, setAttribute, setId, setName, setParent, setStyle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.click.Control

getContext, getId, getMessages, getName, getParent, onDeploy, setListener, setName, setParent

Field Detail

container

protected AbstractContainer container

Internal container instance.

Constructor Detail

AbstractContainerField

public AbstractContainerField()

Create a ContainerField with no name defined.

AbstractContainerField

public AbstractContainerField(String name)

Create a ContainerField with the given name.

Parameters:

name - the ContainerField name

Method Detail

add

public Control add(Control control)

Specified by:

add in interface Container

Parameters:

control - the control to add to the container and return

Returns:

the control that was added to the container

See Also:

Container.add(net.sf.click.Control).

insert

public Control insert(Control control,
                      int index)

Specified by:

insert in interface Container

Parameters:

control - the control to add to the container and return

index - the index at which the control is to be inserted

Returns:

the control that was added to the container

See Also:

Container.insert(net.sf.click.Control, int).

remove

public boolean remove(Control control)

Specified by:

remove in interface Container

Parameters:

control - the control to remove from the container

Returns:

true if the control was removed from the container

See Also:

Container.remove(net.sf.click.Control)

getContainer

public Container getContainer()

Return the internal container instance.

Returns:

the internal container instance

getControls

public List getControls()

Specified by:

getControls in interface Container

Returns:

the sequential list of controls held by the container

See Also:

Container.getControls()

getControl

public Control getControl(String controlName)

Specified by:

getControl in interface Container

Parameters:

controlName - the name of the control to get from the container

Returns:

the named control from the container if found or null otherwise

See Also:

Container.getControl(java.lang.String)

contains

public boolean contains(Control control)

Specified by:

contains in interface Container

Parameters:

control - the control whose presence in this container is to be tested

Returns:

true if the container contains the specified control

See Also:

Container.contains(net.sf.click.Control)

hasControls

public boolean hasControls()

Returns true if this container has existing controls, false otherwise.

Specified by:

hasControls in interface Container

Returns:

true if the container has existing controls, false otherwise.

See Also:

AbstractContainer.hasControls()

getHtmlImports

public String getHtmlImports()

Return the HTML head import statements for contained controls.

Specified by:

getHtmlImports in interface Control

Overrides:

getHtmlImports in class AbstractControl

Returns:

the HTML includes statements for the contained control stylesheet and JavaScript files

See Also:

Control.getHtmlImports()

bindRequestValue

public void bindRequestValue()

This method does nothing by default.

Subclasses should override this method to binds the submitted request value to the Field's value. For example:

 public CoolField extends AbstractContainerField {

     public CoolField(String name) {
         super(name);
     }

     public void bindRequestValue() {
         setValue(getRequestValue());
     }

     // Below is the actual getRequestValue implementation as defined
     // in Field. This is done solely to show how to retrieve the
     // request parameter based on the fields name.
     protected String getRequestValue() {
         String value = getContext().getRequestParameter(getName());
         if (value != null) {
             return value.trim();
         } else {
             return "";
         }
     }
 }
 

Note you can use method Field.getRequestValue() to retrieve the fields value if the request parameter is the fields name.

Overrides:

bindRequestValue in class Field

onProcess

public boolean onProcess()

Specified by:

onProcess in interface Control

Overrides:

onProcess in class Field

Returns:

true to continue Page event processing or false otherwise

See Also:

Control.onProcess()

onDestroy

public void onDestroy()

Specified by:

onDestroy in interface Control

Overrides:

onDestroy in class AbstractControl

See Also:

Control.onDestroy()

onInit

public void onInit()

Specified by:

onInit in interface Control

Overrides:

onInit in class Field

See Also:

Control.onInit()

onRender

public void onRender()

Specified by:

onRender in interface Control

Overrides:

onRender in class AbstractControl

See Also:

Control.onRender()

render

public void render(HtmlStringBuffer buffer)

By default render the container and all its child controls to the specified buffer.

If AbstractControl.getTag() returns null, this method will render only its child controls.

Specified by:

render in interface Control

Overrides:

render in class AbstractControl

Parameters:

buffer - the specified buffer to render the control's output to

See Also:

AbstractControl.render(net.sf.click.util.HtmlStringBuffer)

toString

public String toString()

Returns the HTML representation of this control.

This method delegates the rendering to the method render(net.sf.click.util.HtmlStringBuffer). The size of buffer is determined by getControlSizeEst().

Overrides:

toString in class AbstractControl

Returns:

the HTML representation of this control

renderTagEnd

protected void renderTagEnd(String tagName,
                            HtmlStringBuffer buffer)

Overrides:

renderTagEnd in class AbstractControl

Parameters:

tagName - the name of the tag to close

buffer - the buffer to append the output to

See Also:

AbstractControl.renderTagEnd(java.lang.String, net.sf.click.util.HtmlStringBuffer)

renderContent

protected void renderContent(HtmlStringBuffer buffer)

Render this container content to the specified buffer.

Parameters:

buffer - the buffer to append the output to

See Also:

AbstractContainer.renderContent(net.sf.click.util.HtmlStringBuffer)

renderChildren

protected void renderChildren(HtmlStringBuffer buffer)

Render this container children to the specified buffer.

Parameters:

buffer - the buffer to append the output to

See Also:

AbstractContainer.renderChildren(net.sf.click.util.HtmlStringBuffer)

getControlMap

protected Map getControlMap()

Return the map of controls where each map's key / value pair will consist of the control name and instance.

Returns:

the map of controls

See Also:

AbstractContainer.getControlMap()

getControlSizeEst

protected int getControlSizeEst()

Overrides:

getControlSizeEst in class AbstractControl

Returns:

the estimated rendered control size in characters

See Also:

AbstractControl.getControlSizeEst()