net.sf.click.control
Class TextArea

java.lang.Object
  net.sf.click.control.AbstractControl
      net.sf.click.control.Field
          net.sf.click.control.TextArea

All Implemented Interfaces:

Control, Serializable

public class TextArea

extends Field

Provides a TextArea control: <textarea></textarea>.

Text Area

Rather lengthy text

TextArea Example

The example below shows how to a TextArea to a Form:

 TextArea commentsField = new TextArea("comments");
 commentsField.setCols(40);
 commentsField.setRows(6);
 form.add(commentsField); 

The TextArea control will rendered HTML output:

 <textarea name="comments" rows="6" cols="40"/></textarea> 

See also the W3C HTML reference: TEXTAREA

Author:

Malcolm Edgar

See Also:

Serialized Form

Field Summary

protected int	cols The number of text area columns.
protected int	maxLength The maximum field length validation constraint.
protected int	minLength The minimum field length validation constraint.
protected int	rows The number of text area rows.
protected static String	VALIDATE_TEXTAREA_FUNCTION The field validation JavaScript function template.

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

TextArea()
Create a TextArea with no name defined.

TextArea(String name)
Construct the TextArea with the given name.

TextArea(String name, boolean required)
Construct the TextArea with the given name and required status.

TextArea(String name, int cols, int rows)
Construct the TextArea with the given name, number of columns and number of rows.

TextArea(String name, String label)
Construct the TextArea with the given name and label.

TextArea(String name, String label, boolean required)
Construct the TextArea with the given name, label and required status.

TextArea(String name, String label, int cols, int rows)
Construct the TextArea with the given name, label, number of columns and number of rows.

TextArea(String name, String label, int cols, int rows, boolean required)
Construct the TextArea with the given name, label, number of columns and number of rows.

Method Summary

int	getCols() Return the number of text area columns.
int	getControlSizeEst() Return the estimated rendered control size in characters.
int	getMaxLength() Returns the maximum field length validation constraint.
int	getMinLength() Returns the minimum field length validation constraint.
int	getRows() Return the number of text area rows.
String	getTag() Return the textarea's html tag: textarea.
String	getValidationJavaScript() Return the field JavaScript client side validation function.
void	render(HtmlStringBuffer buffer) Render the HTML representation of the TextArea.
void	setCols(int cols) Set the number of text area columns.
void	setMaxLength(int maxLength) Sets the maximum field length.
void	setMinLength(int minLength) Sets the minimum field length validation constraint.
void	setRows(int rows) Set the number of text area rows.
void	validate() Validate the TextArea request submission.

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

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

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

addStyleClass, appendAttributes, getActionListener, getAttribute, getAttributes, getContext, getHtmlImports, getMessage, getMessage, getMessage, getMessages, getName, getPage, getParent, getStyle, getStyles, hasAttribute, hasAttributes, hasStyles, onDeploy, onDestroy, onRender, registerActionEvent, removeStyleClass, renderTagBegin, renderTagEnd, setActionListener, setAttribute, setId, setName, setStyle, toString

Methods inherited from class java.lang.Object

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

Field Detail

VALIDATE_TEXTAREA_FUNCTION

protected static final String VALIDATE_TEXTAREA_FUNCTION

The field validation JavaScript function template. The function template arguments are:

• 0 - is the field id
• 1 - is the Field required status
• 2 - is the minimum length
• 3 - is the maximum length
• 4 - is the localized error message for required validation
• 5 - is the localized error message for minimum length validation
• 6 - is the localized error message for maximum length validation

See Also:

Constant Field Values

cols

protected int cols

The number of text area columns. The default number of columns is twenty.

maxLength

protected int maxLength

The maximum field length validation constraint. If the value is zero this validation constraint is not applied. The default value is zero.

minLength

protected int minLength

The minimum field length validation constraint. If the valid is zero this validation constraint is not applied. The default value is zero.

rows

protected int rows

The number of text area rows. The default number of rows is three.

Constructor Detail

TextArea

public TextArea(String name)

Construct the TextArea with the given name. The area will have a default size of 20 cols and 3 rows.

Parameters:

name - the name of the field

TextArea

public TextArea(String name,
                String label)

Construct the TextArea with the given name and label. The area will have a default size of 20 cols and 3 rows.

Parameters:

name - the name of the field

label - the label of the field

TextArea

public TextArea(String name,
                boolean required)

Construct the TextArea with the given name and required status. The area will have a default size of 20 cols and 3 rows.

Parameters:

name - the name of the field

required - the field required status

TextArea

public TextArea(String name,
                String label,
                boolean required)

Construct the TextArea with the given name, label and required status. The area will have a default size of 20 cols and 3 rows.

Parameters:

name - the name of the field

label - the label of the field

required - the field required status

TextArea

public TextArea(String name,
                int cols,
                int rows)

Construct the TextArea with the given name, number of columns and number of rows.

Parameters:

name - the name of the field

cols - the number of text area cols

rows - the number of text area rows

TextArea

public TextArea(String name,
                String label,
                int cols,
                int rows)

Construct the TextArea with the given name, label, number of columns and number of rows.

Parameters:

name - the name of the field

label - the label of the field

cols - the number of text area cols

rows - the number of text area rows

TextArea

public TextArea(String name,
                String label,
                int cols,
                int rows,
                boolean required)

Construct the TextArea with the given name, label, number of columns and number of rows.

Parameters:

name - the name of the field

label - the label of the field

cols - the number of text area cols

rows - the number of text area rows

required - the field required status

TextArea

public TextArea()

Create a TextArea with no name defined.

Please note the control's name must be defined before it is valid.

Method Detail

getTag

public String getTag()

Return the textarea's html tag: textarea.

Overrides:

getTag in class AbstractControl

Returns:

this controls html tag

See Also:

AbstractControl.getTag()

getCols

public int getCols()

Return the number of text area columns.

Returns:

the number of text area columns

setCols

public void setCols(int cols)

Set the number of text area columns. The default number of columns is 20.

Parameters:

cols - set the number of text area columns.

getMaxLength

public int getMaxLength()

Returns the maximum field length validation constraint. If the maxLength property is greater than zero, the Field values length will be validated against this constraint when processed.

Returns:

the maximum field length validation constraint

setMaxLength

public void setMaxLength(int maxLength)

Sets the maximum field length. If the maxLength property is greater than zero, the Field values length will be validated against this constraint when processed.

Parameters:

maxLength - the maximum field length validation constraint

getMinLength

public int getMinLength()

Returns the minimum field length validation constraint. If the minLength property is greater than zero, the Field values length will be validated against this constraint when processed.

Returns:

the minimum field length validation constraint

setMinLength

public void setMinLength(int minLength)

Sets the minimum field length validation constraint. If the minLength property is greater than zero, the Field values length will be validated against this constraint when processed.

Parameters:

minLength - the minimum field length validation constraint

getRows

public int getRows()

Return the number of text area rows.

Returns:

the number of text area rows

setRows

public void setRows(int rows)

Set the number of text area rows. The default number of rows is 3.

Parameters:

rows - set the number of text area rows

getControlSizeEst

public int getControlSizeEst()

Description copied from class: AbstractControl

Return the estimated rendered control size in characters.

Overrides:

getControlSizeEst in class AbstractControl

Returns:

the estimated rendered control size in characters

See Also:

AbstractControl.getControlSizeEst()

render

public void render(HtmlStringBuffer buffer)

Render the HTML representation of the TextArea.

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.toString()

validate

public void validate()

Validate the TextArea request submission.

A field error message is displayed if a validation error occurs. These messages are defined in the resource bundle:

net.sf.click.control.MessageProperties

Error message bundle key names include:

• field-maxlength-error
• field-minlength-error
• field-required-error

Overrides:

validate in class Field

getValidationJavaScript

public String getValidationJavaScript()

Return the field JavaScript client side validation function.

The function name must follow the format validate_[id], where the id is the DOM element id of the fields focusable HTML element, to ensure the function has a unique name.

Overrides:

getValidationJavaScript in class Field

Returns:

the field JavaScript client side validation function