Home » Eclipse Projects » Nebula » FormattedText without DataBinding Clashes - Sample Code
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| Re: FormattedText without DataBinding Clashes - Sample Code [message #56889 is a reply to message #56859] |
Sat, 02 August 2008 16:20   |
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Originally posted by: maralc.gmail.com
I have the exact same problem.
I think it is a bug.
Somebody from the Nebula project can give us a hand about this issue?
The code posted really fixes the problem, but is it the best way to
solve the problem?
Thanks in advance.
Marcelo
Nelson Fernando wrote:
> I created a constructor in the FormattedText that removes the databinding
> before the setText method of the Text widget being called so that the
> binding events over the text property of the Text widget don´t get fired
> because of it .
>
> I was having event clashes between the databinding and the FormattedText
> before doing it if . Maybe it can help other people that have trouble with
> binding so heres the code :
>
> /*********************************************************** ********************
> * Copyright (c) 2005, 2007 Eric Wuillai.
> * All rights reserved. This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License v1.0
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/epl-v10.html
> *
> * Contributors:
> * Eric Wuillai (eric@wdev91.com) - initial API and implementation
> ************************************************************ *******************/package org.eclipse.nebula.widgets.formattedtext;import org.eclipse.core.databinding.Binding;import org.eclipse.core.databinding.DataBindingContext;import org.eclipse.swt.SWT;import org.eclipse.swt.events.DisposeEvent;import org.eclipse.swt.events.DisposeListener;import org.eclipse.swt.events.FocusEvent;import org.eclipse.swt.events.FocusListener;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Event;import org.eclipse.swt.widgets.Listener;import org.eclipse.swt.widgets.Text;/** * Formatted text viewer. Add formating capabilities to the<code>Text</code> * widget of SWT. This control works on the same principle than the JFace * viewers. The embedded text widget is accessible by the getControl()method, * allowing to apply to it all necessary behaviors (layout,listeners...).<p> * * Formatting is
delegated to formatter objects implementing the<code>ITextFormatter</code> * interface. Each formatter class manages a base class of values (date,number...).<br> * Formatters are associated by 2 differents means : * <ul> * <li>By the <code>setFormatter()</code> method.</li> * <li>When <code>setValue()</code> is called and there is currently noformatter, * a new one is automatically created based on the class of thevalue.</li> * </ul> * * <h4>Styles:</h4> * <blockquote> * CENTER, LEFT, RIGHT, READ_ONLY * </blockquote> */public class FormattedText{ /** Encapsulated Text widget */ protected Text text; /** Formatter */ protected ITextFormatter formatter = null; /** Save position of cursor when the focus is lost */ protected int caretPos; /** Layout */ protected GridLayout layout; /** Filter for modify events */ protected Listener modifyFilter; /** * Databinding context */ protected DataBindingContext context ; /** * Binding of the text Field */ prot
ected Binding binding; protected static int count = 0; protected int id = ++count; /** * Creates a formatted text on a newly-created text control under the given * parent. The text control is created using the SWT style bits * <code>BORDER</code>. * * @param parent the parent control */ public FormattedText(Composite parent) { this(parent, SWT.BORDER); } /** * Creates a formatted text on a newly-created text control under thegiven * parent. The text control is created using the given SWT style bits. * * @param parent the parent control * @param style the SWT style bits used to create the text */ public FormattedText(Composite parent, int style) { this(new Text(parent, style & (~ (SWT.MULTI | SWT.PASSWORD |SWT.WRAP)))); } /** * Creates a formatted text on the given text control. * AND adds the binding context and text binding to the FormattedText * to avoid event clashes * @param t the text control */public FormattedText(Text t , DataBindingC
ontext context ,Binding binding) { // Adding the binding context this.context = context; //Adding the binding this.binding = binding; this.text = t; text.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); setText(formatter.getEditString()); text.setSelection(caretPos); formatter.setIgnore(false); } } public void focusLost(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); caretPos = text.getCaretPosition(); setText(formatter.getDisplayString()); formatter.setIgnore(false); } } }); modifyFilter = new Listener() { public void handleEvent(Event event) { event.type = SWT.None; } }; text.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { text = null; modifyFilter = null; formatter =
null; } });} /** * Creates a formatted text on the given text control. * * @param t the text control */ public FormattedText(Text t) { this.text = t; text.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); setText(formatter.getEditString()); text.setSelection(caretPos); formatter.setIgnore(false); } } public void focusLost(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); caretPos = text.getCaretPosition(); setText(formatter.getDisplayString()); formatter.setIgnore(false); } } }); modifyFilter = new Listener() { public void handleEvent(Event event) { event.type = SWT.None; } }; text.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { text
= null; modifyFilter = null; formatter = null; } }); } /** * Returns the primary <code>Text</code> control associated with thisviewer. * * @return the SWT text control which displays this viewer's content */ public Text getControl() { return text; } /** * Returns the formatter associated to the <code>Text</code> widget. * * @return Formatter, or <code>null</code> if no formatter is currentlyassociated */ public ITextFormatter getFormatter() { return formatter; } /** * Returns the current value of the widget.<p> * * The returned value is provided by the formatter and is of the typemanaged * bu the formatter. For exemple a <code>DateFormatter</code> will returna * <code>Date</code> value.<br> * If no formatter is associated, the <code>String</code> contained in the * <code>Text</code> widget is returned. * * @return Current value */ public Object getValue() { return formatter != null ? formatter.getVal
ue() : text.getText(); } /** * Returns <code>true</code> if the current value is valid, else<code>false</code>. * * @return <code>true</code> if valid. */ public boolean isValid() { return formatter != null ? formatter.isValid() : true; } /** * Associates a formatter to the widget. * * @param formatter formatter */ public void setFormatter(ITextFormatter formatter) { if ( formatter == null ) SWT.error(SWT.ERROR_NULL_ARGUMENT); if ( this.formatter != null ) { text.removeVerifyListener(this.formatter); this.formatter.detach(); } this.formatter = formatter; this.formatter.setText(text); text.addVerifyListener(this.formatter); formatter.setIgnore(true); text.setText(formatter.getDisplayString()); formatter.setIgnore(false); } /** * Sets the Text widget value, preventing fire of Modify events. * * @param value The String value to display in the widget */ private void setText(String value) { Display display = text.g
etDisplay(); try { display.addFilter(SWT.Modify, modifyFilter); // Heres all the diference // Removing this binding before setting anything if(context != null && binding != null ){ context.removeBinding(binding); } text.setText(value); } finally { display.removeFilter(SWT.Modify, modifyFilter); // here whe can put bakc the binding if(context != null && binding != null ){ context.addBinding(binding); } } } /** * Sets a new value.<p> * * If no formatter is currently associated to he widget, a new one iscreated * by the factory based on the value's class.<br> * If the value is incompatible with the formatter, an<code>IllegalArgumentException</code> * is returned. * * @param value new value */ public void setValue(Object value) { if ( formatter == null ) { setFormatter(DefaultFormatterFactory.createFormatter(value)) ; } formatter.setValue(value); formatter.setIgnore(true); text.setText(text.isF
ocusControl() ? formatter.getEditString() : formatter.getDisplayString()); formatter.setIgnore(false); }}
>
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| Re: FormattedText without DataBinding Clashes - Sample Code [message #56965 is a reply to message #56889] |
Mon, 04 August 2008 06:03 |
 Thomas Schindl
Messages: 4463
Registered: July 2009 |
Senior Member |
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You you file a bug and add a snippet to test and patch against CVS?
Tom
Marcelo Alcantara schrieb:
> I have the exact same problem.
>
> I think it is a bug.
>
> Somebody from the Nebula project can give us a hand about this issue?
>
> The code posted really fixes the problem, but is it the best way to
> solve the problem?
>
> Thanks in advance.
>
> Marcelo
>
> Nelson Fernando wrote:
>> I created a constructor in the FormattedText that removes the
>> databinding before the setText method of the Text widget being called
>> so that the binding events over the text property of the Text widget
>> don´t get fired because of it .
>>
>> I was having event clashes between the databinding and the
>> FormattedText before doing it if . Maybe it can help other people that
>> have trouble with binding so heres the code :
>>
>> /*********************************************************** ********************
>>
>> * Copyright (c) 2005, 2007 Eric Wuillai.
>> * All rights reserved. This program and the accompanying materials
>> * are made available under the terms of the Eclipse Public License v1.0
>> * which accompanies this distribution, and is available at
>> * http://www.eclipse.org/legal/epl-v10.html
>> *
>> * Contributors:
>> * Eric Wuillai (eric@wdev91.com) - initial API and implementation
>> ************************************************************ *******************/package
>> org.eclipse.nebula.widgets.formattedtext;import
>> org.eclipse.core.databinding.Binding;import
>> org.eclipse.core.databinding.DataBindingContext;import
>> org.eclipse.swt.SWT;import org.eclipse.swt.events.DisposeEvent;import
>> org.eclipse.swt.events.DisposeListener;import
>> org.eclipse.swt.events.FocusEvent;import
>> org.eclipse.swt.events.FocusListener;import
>> org.eclipse.swt.layout.GridLayout;import
>> org.eclipse.swt.widgets.Composite;import
>> org.eclipse.swt.widgets.Display;import
>> org.eclipse.swt.widgets.Event;import
>> org.eclipse.swt.widgets.Listener;import
>> org.eclipse.swt.widgets.Text;/** * Formatted text viewer. Add
>> formating capabilities to the<code>Text</code> * widget of SWT. This
>> control works on the same principle than the JFace * viewers. The
>> embedded text widget is accessible by the getControl()method, *
>> allowing to apply to it all necessary behaviors
>> (layout,listeners...).<p> * * Formatting is
> delegated to formatter objects implementing
> the<code>ITextFormatter</code> * interface. Each formatter class manages
> a base class of values (date,number...).<br> * Formatters are associated
> by 2 differents means : * <ul> * <li>By the
> <code>setFormatter()</code> method.</li> * <li>When
> <code>setValue()</code> is called and there is currently noformatter,
> * a new one is automatically created based on the class of
> thevalue.</li> * </ul> * * <h4>Styles:</h4> * <blockquote> * CENTER,
> LEFT, RIGHT, READ_ONLY * </blockquote> */public class FormattedText{
> /** Encapsulated Text widget */ protected Text text; /** Formatter */
> protected ITextFormatter formatter = null; /** Save position of cursor
> when the focus is lost */ protected int caretPos; /** Layout */
> protected GridLayout layout; /** Filter for modify events */ protected
> Listener modifyFilter; /** * Databinding context */ protected
> DataBindingContext context ; /** * Binding of the text Field */ prot
> ected Binding binding; protected static int count = 0; protected int
> id = ++count; /** * Creates a formatted text on a newly-created text
> control under the given * parent. The text control is created using the
> SWT style bits * <code>BORDER</code>. * * @param parent the parent
> control */ public FormattedText(Composite parent) { this(parent,
> SWT.BORDER); } /** * Creates a formatted text on a newly-created
> text control under thegiven * parent. The text control is created using
> the given SWT style bits. * * @param parent the parent control *
> @param style the SWT style bits used to create the text */ public
> FormattedText(Composite parent, int style) { this(new Text(parent,
> style & (~ (SWT.MULTI | SWT.PASSWORD |SWT.WRAP)))); } /** * Creates a
> formatted text on the given text control. * AND adds the binding
> context and text binding to the FormattedText * to avoid event clashes
> * @param t the text control */public FormattedText(Text t , DataBindingC
> ontext context ,Binding binding) { // Adding the binding context
> this.context = context; //Adding the binding this.binding = binding;
> this.text = t; text.addFocusListener(new FocusListener() { public
> void focusGained(FocusEvent e) { if ( formatter != null &&
> text.getEditable() ) { formatter.setIgnore(true);
> setText(formatter.getEditString());
> text.setSelection(caretPos); formatter.setIgnore(false);
> } } public void focusLost(FocusEvent e) { if ( formatter !=
> null && text.getEditable() ) { formatter.setIgnore(true);
> caretPos = text.getCaretPosition();
> setText(formatter.getDisplayString());
> formatter.setIgnore(false); } } }); modifyFilter = new
> Listener() { public void handleEvent(Event event) { event.type =
> SWT.None; } }; text.addDisposeListener(new DisposeListener() { public
> void widgetDisposed(DisposeEvent e) { text = null;
> modifyFilter = null; formatter =
> null; } });} /** * Creates a formatted text on the given text
> control. * * @param t the text control */ public FormattedText(Text
> t) { this.text = t; text.addFocusListener(new FocusListener() {
> public void focusGained(FocusEvent e) { if ( formatter != null &&
> text.getEditable() ) { formatter.setIgnore(true);
> setText(formatter.getEditString());
> text.setSelection(caretPos); formatter.setIgnore(false);
> } } public void focusLost(FocusEvent e) { if (
> formatter != null && text.getEditable() ) {
> formatter.setIgnore(true); caretPos =
> text.getCaretPosition();
> setText(formatter.getDisplayString());
> formatter.setIgnore(false); } } }); modifyFilter = new
> Listener() { public void handleEvent(Event event) { event.type =
> SWT.None; } }; text.addDisposeListener(new DisposeListener() {
> public void widgetDisposed(DisposeEvent e) { text = null;
> modifyFilter = null; formatter = null; } }); } /** *
> Returns the primary <code>Text</code> control associated with
> thisviewer. * * @return the SWT text control which displays this
> viewer's content */ public Text getControl() { return text; }
> /** * Returns the formatter associated to the <code>Text</code>
> widget. * * @return Formatter, or <code>null</code> if no formatter
> is currentlyassociated */ public ITextFormatter getFormatter() {
> return formatter; } /** * Returns the current value of the
> widget.<p> * * The returned value is provided by the formatter and
> is of the typemanaged * bu the formatter. For exemple a
> <code>DateFormatter</code> will returna * <code>Date</code>
> value.<br> * If no formatter is associated, the <code>String</code>
> contained in the * <code>Text</code> widget is returned. * *
> @return Current value */ public Object getValue() { return
> formatter != null ? formatter.getVal
> ue() : text.getText(); } /** * Returns <code>true</code> if the
> current value is valid, else<code>false</code>. * * @return
> <code>true</code> if valid. */ public boolean isValid() { return
> formatter != null ? formatter.isValid() : true; } /** * Associates a
> formatter to the widget. * * @param formatter formatter */ public
> void setFormatter(ITextFormatter formatter) { if ( formatter == null )
> SWT.error(SWT.ERROR_NULL_ARGUMENT); if ( this.formatter != null ) {
> text.removeVerifyListener(this.formatter); this.formatter.detach();
> } this.formatter = formatter; this.formatter.setText(text);
> text.addVerifyListener(this.formatter); formatter.setIgnore(true);
> text.setText(formatter.getDisplayString());
> formatter.setIgnore(false); } /** * Sets the Text widget value,
> preventing fire of Modify events. * * @param value The String value
> to display in the widget */ private void setText(String value) {
> Display display = text.g
> etDisplay(); try { display.addFilter(SWT.Modify, modifyFilter);
> // Heres all the diference // Removing this binding before setting
> anything if(context != null && binding != null ){
> context.removeBinding(binding); } text.setText(value); } finally
> { display.removeFilter(SWT.Modify, modifyFilter); // here whe
> can put bakc the binding if(context != null && binding != null ){
> context.addBinding(binding); } } } /** * Sets a new value.<p>
> * * If no formatter is currently associated to he widget, a new one
> iscreated * by the factory based on the value's class.<br> * If the
> value is incompatible with the formatter,
> an<code>IllegalArgumentException</code> * is returned. * * @param
> value new value */ public void setValue(Object value) { if (
> formatter == null ) {
> setFormatter(DefaultFormatterFactory.createFormatter(value)) ; }
> formatter.setValue(value); formatter.setIgnore(true);
> text.setText(text.isF
> ocusControl() ?
> formatter.getEditString() :
> formatter.getDisplayString()); formatter.setIgnore(false); }}
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
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| Re: FormattedText without DataBinding Clashes - Sample Code [message #591408 is a reply to message #56859] |
Sat, 02 August 2008 16:20 |
Marcelo Alcantara
Messages: 48
Registered: July 2009 |
Member |
|
|
I have the exact same problem.
I think it is a bug.
Somebody from the Nebula project can give us a hand about this issue?
The code posted really fixes the problem, but is it the best way to
solve the problem?
Thanks in advance.
Marcelo
Nelson Fernando wrote:
> I created a constructor in the FormattedText that removes the databinding
> before the setText method of the Text widget being called so that the
> binding events over the text property of the Text widget don´t get fired
> because of it .
>
> I was having event clashes between the databinding and the FormattedText
> before doing it if . Maybe it can help other people that have trouble with
> binding so heres the code :
>
> /*********************************************************** ********************
> * Copyright (c) 2005, 2007 Eric Wuillai.
> * All rights reserved. This program and the accompanying materials
> * are made available under the terms of the Eclipse Public License v1.0
> * which accompanies this distribution, and is available at
> * http://www.eclipse.org/legal/epl-v10.html
> *
> * Contributors:
> * Eric Wuillai (eric@wdev91.com) - initial API and implementation
> ************************************************************ *******************/package org.eclipse.nebula.widgets.formattedtext;import org.eclipse.core.databinding.Binding;import org.eclipse.core.databinding.DataBindingContext;import org.eclipse.swt.SWT;import org.eclipse.swt.events.DisposeEvent;import org.eclipse.swt.events.DisposeListener;import org.eclipse.swt.events.FocusEvent;import org.eclipse.swt.events.FocusListener;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.Composite;import org.eclipse.swt.widgets.Display;import org.eclipse.swt.widgets.Event;import org.eclipse.swt.widgets.Listener;import org.eclipse.swt.widgets.Text;/** * Formatted text viewer. Add formating capabilities to the<code>Text</code> * widget of SWT. This control works on the same principle than the JFace * viewers. The embedded text widget is accessible by the getControl()method, * allowing to apply to it all necessary behaviors (layout,listeners...).<p> * * Formatting is
delegated to formatter objects implementing the<code>ITextFormatter</code> * interface. Each formatter class manages a base class of values (date,number...).<br> * Formatters are associated by 2 differents means : * <ul> * <li>By the <code>setFormatter()</code> method.</li> * <li>When <code>setValue()</code> is called and there is currently noformatter, * a new one is automatically created based on the class of thevalue.</li> * </ul> * * <h4>Styles:</h4> * <blockquote> * CENTER, LEFT, RIGHT, READ_ONLY * </blockquote> */public class FormattedText{ /** Encapsulated Text widget */ protected Text text; /** Formatter */ protected ITextFormatter formatter = null; /** Save position of cursor when the focus is lost */ protected int caretPos; /** Layout */ protected GridLayout layout; /** Filter for modify events */ protected Listener modifyFilter; /** * Databinding context */ protected DataBindingContext context ; /** * Binding of the text Field */ prot
ected Binding binding; protected static int count = 0; protected int id = ++count; /** * Creates a formatted text on a newly-created text control under the given * parent. The text control is created using the SWT style bits * <code>BORDER</code>. * * @param parent the parent control */ public FormattedText(Composite parent) { this(parent, SWT.BORDER); } /** * Creates a formatted text on a newly-created text control under thegiven * parent. The text control is created using the given SWT style bits. * * @param parent the parent control * @param style the SWT style bits used to create the text */ public FormattedText(Composite parent, int style) { this(new Text(parent, style & (~ (SWT.MULTI | SWT.PASSWORD |SWT.WRAP)))); } /** * Creates a formatted text on the given text control. * AND adds the binding context and text binding to the FormattedText * to avoid event clashes * @param t the text control */public FormattedText(Text t , DataBindingC
ontext context ,Binding binding) { // Adding the binding context this.context = context; //Adding the binding this.binding = binding; this.text = t; text.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); setText(formatter.getEditString()); text.setSelection(caretPos); formatter.setIgnore(false); } } public void focusLost(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); caretPos = text.getCaretPosition(); setText(formatter.getDisplayString()); formatter.setIgnore(false); } } }); modifyFilter = new Listener() { public void handleEvent(Event event) { event.type = SWT.None; } }; text.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { text = null; modifyFilter = null; formatter =
null; } });} /** * Creates a formatted text on the given text control. * * @param t the text control */ public FormattedText(Text t) { this.text = t; text.addFocusListener(new FocusListener() { public void focusGained(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); setText(formatter.getEditString()); text.setSelection(caretPos); formatter.setIgnore(false); } } public void focusLost(FocusEvent e) { if ( formatter != null && text.getEditable() ) { formatter.setIgnore(true); caretPos = text.getCaretPosition(); setText(formatter.getDisplayString()); formatter.setIgnore(false); } } }); modifyFilter = new Listener() { public void handleEvent(Event event) { event.type = SWT.None; } }; text.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { text
= null; modifyFilter = null; formatter = null; } }); } /** * Returns the primary <code>Text</code> control associated with thisviewer. * * @return the SWT text control which displays this viewer's content */ public Text getControl() { return text; } /** * Returns the formatter associated to the <code>Text</code> widget. * * @return Formatter, or <code>null</code> if no formatter is currentlyassociated */ public ITextFormatter getFormatter() { return formatter; } /** * Returns the current value of the widget.<p> * * The returned value is provided by the formatter and is of the typemanaged * bu the formatter. For exemple a <code>DateFormatter</code> will returna * <code>Date</code> value.<br> * If no formatter is associated, the <code>String</code> contained in the * <code>Text</code> widget is returned. * * @return Current value */ public Object getValue() { return formatter != null ? formatter.getVal
ue() : text.getText(); } /** * Returns <code>true</code> if the current value is valid, else<code>false</code>. * * @return <code>true</code> if valid. */ public boolean isValid() { return formatter != null ? formatter.isValid() : true; } /** * Associates a formatter to the widget. * * @param formatter formatter */ public void setFormatter(ITextFormatter formatter) { if ( formatter == null ) SWT.error(SWT.ERROR_NULL_ARGUMENT); if ( this.formatter != null ) { text.removeVerifyListener(this.formatter); this.formatter.detach(); } this.formatter = formatter; this.formatter.setText(text); text.addVerifyListener(this.formatter); formatter.setIgnore(true); text.setText(formatter.getDisplayString()); formatter.setIgnore(false); } /** * Sets the Text widget value, preventing fire of Modify events. * * @param value The String value to display in the widget */ private void setText(String value) { Display display = text.g
etDisplay(); try { display.addFilter(SWT.Modify, modifyFilter); // Heres all the diference // Removing this binding before setting anything if(context != null && binding != null ){ context.removeBinding(binding); } text.setText(value); } finally { display.removeFilter(SWT.Modify, modifyFilter); // here whe can put bakc the binding if(context != null && binding != null ){ context.addBinding(binding); } } } /** * Sets a new value.<p> * * If no formatter is currently associated to he widget, a new one iscreated * by the factory based on the value's class.<br> * If the value is incompatible with the formatter, an<code>IllegalArgumentException</code> * is returned. * * @param value new value */ public void setValue(Object value) { if ( formatter == null ) { setFormatter(DefaultFormatterFactory.createFormatter(value)) ; } formatter.setValue(value); formatter.setIgnore(true); text.setText(text.isF
ocusControl() ? formatter.getEditString() : formatter.getDisplayString()); formatter.setIgnore(false); }}
>
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| Re: FormattedText without DataBinding Clashes - Sample Code [message #591437 is a reply to message #56889] |
Mon, 04 August 2008 06:03 |
Thomas Schindl
Messages: 4463
Registered: July 2009 |
Senior Member |
|
|
You you file a bug and add a snippet to test and patch against CVS?
Tom
Marcelo Alcantara schrieb:
> I have the exact same problem.
>
> I think it is a bug.
>
> Somebody from the Nebula project can give us a hand about this issue?
>
> The code posted really fixes the problem, but is it the best way to
> solve the problem?
>
> Thanks in advance.
>
> Marcelo
>
> Nelson Fernando wrote:
>> I created a constructor in the FormattedText that removes the
>> databinding before the setText method of the Text widget being called
>> so that the binding events over the text property of the Text widget
>> don´t get fired because of it .
>>
>> I was having event clashes between the databinding and the
>> FormattedText before doing it if . Maybe it can help other people that
>> have trouble with binding so heres the code :
>>
>> /*********************************************************** ********************
>>
>> * Copyright (c) 2005, 2007 Eric Wuillai.
>> * All rights reserved. This program and the accompanying materials
>> * are made available under the terms of the Eclipse Public License v1.0
>> * which accompanies this distribution, and is available at
>> * http://www.eclipse.org/legal/epl-v10.html
>> *
>> * Contributors:
>> * Eric Wuillai (eric@wdev91.com) - initial API and implementation
>> ************************************************************ *******************/package
>> org.eclipse.nebula.widgets.formattedtext;import
>> org.eclipse.core.databinding.Binding;import
>> org.eclipse.core.databinding.DataBindingContext;import
>> org.eclipse.swt.SWT;import org.eclipse.swt.events.DisposeEvent;import
>> org.eclipse.swt.events.DisposeListener;import
>> org.eclipse.swt.events.FocusEvent;import
>> org.eclipse.swt.events.FocusListener;import
>> org.eclipse.swt.layout.GridLayout;import
>> org.eclipse.swt.widgets.Composite;import
>> org.eclipse.swt.widgets.Display;import
>> org.eclipse.swt.widgets.Event;import
>> org.eclipse.swt.widgets.Listener;import
>> org.eclipse.swt.widgets.Text;/** * Formatted text viewer. Add
>> formating capabilities to the<code>Text</code> * widget of SWT. This
>> control works on the same principle than the JFace * viewers. The
>> embedded text widget is accessible by the getControl()method, *
>> allowing to apply to it all necessary behaviors
>> (layout,listeners...).<p> * * Formatting is
> delegated to formatter objects implementing
> the<code>ITextFormatter</code> * interface. Each formatter class manages
> a base class of values (date,number...).<br> * Formatters are associated
> by 2 differents means : * <ul> * <li>By the
> <code>setFormatter()</code> method.</li> * <li>When
> <code>setValue()</code> is called and there is currently noformatter,
> * a new one is automatically created based on the class of
> thevalue.</li> * </ul> * * <h4>Styles:</h4> * <blockquote> * CENTER,
> LEFT, RIGHT, READ_ONLY * </blockquote> */public class FormattedText{
> /** Encapsulated Text widget */ protected Text text; /** Formatter */
> protected ITextFormatter formatter = null; /** Save position of cursor
> when the focus is lost */ protected int caretPos; /** Layout */
> protected GridLayout layout; /** Filter for modify events */ protected
> Listener modifyFilter; /** * Databinding context */ protected
> DataBindingContext context ; /** * Binding of the text Field */ prot
> ected Binding binding; protected static int count = 0; protected int
> id = ++count; /** * Creates a formatted text on a newly-created text
> control under the given * parent. The text control is created using the
> SWT style bits * <code>BORDER</code>. * * @param parent the parent
> control */ public FormattedText(Composite parent) { this(parent,
> SWT.BORDER); } /** * Creates a formatted text on a newly-created
> text control under thegiven * parent. The text control is created using
> the given SWT style bits. * * @param parent the parent control *
> @param style the SWT style bits used to create the text */ public
> FormattedText(Composite parent, int style) { this(new Text(parent,
> style & (~ (SWT.MULTI | SWT.PASSWORD |SWT.WRAP)))); } /** * Creates a
> formatted text on the given text control. * AND adds the binding
> context and text binding to the FormattedText * to avoid event clashes
> * @param t the text control */public FormattedText(Text t , DataBindingC
> ontext context ,Binding binding) { // Adding the binding context
> this.context = context; //Adding the binding this.binding = binding;
> this.text = t; text.addFocusListener(new FocusListener() { public
> void focusGained(FocusEvent e) { if ( formatter != null &&
> text.getEditable() ) { formatter.setIgnore(true);
> setText(formatter.getEditString());
> text.setSelection(caretPos); formatter.setIgnore(false);
> } } public void focusLost(FocusEvent e) { if ( formatter !=
> null && text.getEditable() ) { formatter.setIgnore(true);
> caretPos = text.getCaretPosition();
> setText(formatter.getDisplayString());
> formatter.setIgnore(false); } } }); modifyFilter = new
> Listener() { public void handleEvent(Event event) { event.type =
> SWT.None; } }; text.addDisposeListener(new DisposeListener() { public
> void widgetDisposed(DisposeEvent e) { text = null;
> modifyFilter = null; formatter =
> null; } });} /** * Creates a formatted text on the given text
> control. * * @param t the text control */ public FormattedText(Text
> t) { this.text = t; text.addFocusListener(new FocusListener() {
> public void focusGained(FocusEvent e) { if ( formatter != null &&
> text.getEditable() ) { formatter.setIgnore(true);
> setText(formatter.getEditString());
> text.setSelection(caretPos); formatter.setIgnore(false);
> } } public void focusLost(FocusEvent e) { if (
> formatter != null && text.getEditable() ) {
> formatter.setIgnore(true); caretPos =
> text.getCaretPosition();
> setText(formatter.getDisplayString());
> formatter.setIgnore(false); } } }); modifyFilter = new
> Listener() { public void handleEvent(Event event) { event.type =
> SWT.None; } }; text.addDisposeListener(new DisposeListener() {
> public void widgetDisposed(DisposeEvent e) { text = null;
> modifyFilter = null; formatter = null; } }); } /** *
> Returns the primary <code>Text</code> control associated with
> thisviewer. * * @return the SWT text control which displays this
> viewer's content */ public Text getControl() { return text; }
> /** * Returns the formatter associated to the <code>Text</code>
> widget. * * @return Formatter, or <code>null</code> if no formatter
> is currentlyassociated */ public ITextFormatter getFormatter() {
> return formatter; } /** * Returns the current value of the
> widget.<p> * * The returned value is provided by the formatter and
> is of the typemanaged * bu the formatter. For exemple a
> <code>DateFormatter</code> will returna * <code>Date</code>
> value.<br> * If no formatter is associated, the <code>String</code>
> contained in the * <code>Text</code> widget is returned. * *
> @return Current value */ public Object getValue() { return
> formatter != null ? formatter.getVal
> ue() : text.getText(); } /** * Returns <code>true</code> if the
> current value is valid, else<code>false</code>. * * @return
> <code>true</code> if valid. */ public boolean isValid() { return
> formatter != null ? formatter.isValid() : true; } /** * Associates a
> formatter to the widget. * * @param formatter formatter */ public
> void setFormatter(ITextFormatter formatter) { if ( formatter == null )
> SWT.error(SWT.ERROR_NULL_ARGUMENT); if ( this.formatter != null ) {
> text.removeVerifyListener(this.formatter); this.formatter.detach();
> } this.formatter = formatter; this.formatter.setText(text);
> text.addVerifyListener(this.formatter); formatter.setIgnore(true);
> text.setText(formatter.getDisplayString());
> formatter.setIgnore(false); } /** * Sets the Text widget value,
> preventing fire of Modify events. * * @param value The String value
> to display in the widget */ private void setText(String value) {
> Display display = text.g
> etDisplay(); try { display.addFilter(SWT.Modify, modifyFilter);
> // Heres all the diference // Removing this binding before setting
> anything if(context != null && binding != null ){
> context.removeBinding(binding); } text.setText(value); } finally
> { display.removeFilter(SWT.Modify, modifyFilter); // here whe
> can put bakc the binding if(context != null && binding != null ){
> context.addBinding(binding); } } } /** * Sets a new value.<p>
> * * If no formatter is currently associated to he widget, a new one
> iscreated * by the factory based on the value's class.<br> * If the
> value is incompatible with the formatter,
> an<code>IllegalArgumentException</code> * is returned. * * @param
> value new value */ public void setValue(Object value) { if (
> formatter == null ) {
> setFormatter(DefaultFormatterFactory.createFormatter(value)) ; }
> formatter.setValue(value); formatter.setIgnore(true);
> text.setText(text.isF
> ocusControl() ?
> formatter.getEditString() :
> formatter.getDisplayString()); formatter.setIgnore(false); }}
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
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