Re: DropDownChoice Default Value
I think it's likely because your KeyValue class does not implement equals. Your
defaultValue has its own new instance of KeyValue that contains the key JAVA
and the value java. Your defaultValue instance and what you think is the same
instance in your list are not the same unless you correctly implement equals()
to identify them as the same. So you are telling the dropdown that it should
select something that it does not have in the list. Also, and this may just be
semantics, but it's probably inappropriate to call that thing a default value
since the dropdown will update the defaultValue value with whatever you select
in the dropdown (i.e. that defaultValue will only be the default value until
you change the selected value in the dropdown). So it's probably more
appropriately named selectedValue.
-David
On Sunday, July 22, 2012 at 10:12 AM, vimal kumar wrote:
Hi All,
I have searched and wasted much of my time figuring out the default Value for
DropDownChoice for Object as dropdown but couldn't find the solution. For
String dropdown i was able to make it work but somehow for object it is not
working.
Below is the Simple example that i have been trying, DropDownChoicePage.html
and DropDownChoicePage.java files.
Can someone please help me that what am i missing into
DropDownChoicePage.java class that is not setting the Drop Down Default
value?
DropDownChoicePage.html
html xmlns=http://www.w3.org/1999/xhtml;head titleDropDown
Example/title/headbody Select your favorite Language select
wicket:id=languageDropDown/select /body/html
---
DropDownChoicePage.java
public class DropDownChoicePage extends WebPage {
public class KeyValue {
private String key; private String value;
public KeyValue(String key, String value) { this.key = key; this.value =
value; }
public String getKey() { return key; }
public String getValue() { return value; }
public void setKey(String key) { this.key = key; }
public void setValue(String value) { this.value = value; }
@Override public String toString() { return getKey(); } }
private static final long serialVersionUID = 2304448232406333188L;
private KeyValue defaultValue = new KeyValue(JAVA, Java);
/** * Constructor */ public DropDownChoicePage() {
ListKeyValue keyValues = new ArrayListDropDownChoicePage.KeyValue();
keyValues.add(new KeyValue(PHP, php)); keyValues.add(new KeyValue(JAVA,
Java)); keyValues.add(new KeyValue(DOT_NET, Dot Net));
DropDownChoiceKeyValue dropDownChoice = new DropDownChoiceKeyValue(
languageDropDown, new PropertyModelKeyValue(this, defaultValue),
keyValues, new ChoiceRendererKeyValue(key, value));
add(dropDownChoice);
}
public KeyValue getDefaultValue() { return defaultValue; }
public void setDefaultValue(KeyValue defaultValue) { this.defaultValue =
defaultValue; }
}
Thanks, Vimal.
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Re: DropDownChoice Default Value
Aww, crap. I see it was already answered in a different thread….or something
that showed up under a different thread in my mail reader at least. Sorry for
the noise.
On Monday, July 23, 2012 at 11:46 PM, David Hosier wrote:
I think it's likely because your KeyValue class does not implement equals.
Your defaultValue has its own new instance of KeyValue that contains the key
JAVA and the value java. Your defaultValue instance and what you think is the
same instance in your list are not the same unless you correctly implement
equals() to identify them as the same. So you are telling the dropdown that
it should select something that it does not have in the list. Also, and this
may just be semantics, but it's probably inappropriate to call that thing a
default value since the dropdown will update the defaultValue value with
whatever you select in the dropdown (i.e. that defaultValue will only be the
default value until you change the selected value in the dropdown). So it's
probably more appropriately named selectedValue.
-David
On Sunday, July 22, 2012 at 10:12 AM, vimal kumar wrote:
Hi All,
I have searched and wasted much of my time figuring out the default Value
for DropDownChoice for Object as dropdown but couldn't find the solution.
For String dropdown i was able to make it work but somehow for object it
is not working.
Below is the Simple example that i have been trying,
DropDownChoicePage.html and DropDownChoicePage.java files.
Can someone please help me that what am i missing into
DropDownChoicePage.java class that is not setting the Drop Down Default
value?
DropDownChoicePage.html
html xmlns=http://www.w3.org/1999/xhtml;head titleDropDown
Example/title/headbody Select your favorite Language select
wicket:id=languageDropDown/select /body/html
---
DropDownChoicePage.java
public class DropDownChoicePage extends WebPage {
public class KeyValue {
private String key; private String value;
public KeyValue(String key, String value) { this.key = key; this.value =
value; }
public String getKey() { return key; }
public String getValue() { return value; }
public void setKey(String key) { this.key = key; }
public void setValue(String value) { this.value = value; }
@Override public String toString() { return getKey(); } }
private static final long serialVersionUID = 2304448232406333188L;
private KeyValue defaultValue = new KeyValue(JAVA, Java);
/** * Constructor */ public DropDownChoicePage() {
ListKeyValue keyValues = new ArrayListDropDownChoicePage.KeyValue();
keyValues.add(new KeyValue(PHP, php)); keyValues.add(new
KeyValue(JAVA, Java)); keyValues.add(new KeyValue(DOT_NET, Dot
Net));
DropDownChoiceKeyValue dropDownChoice = new DropDownChoiceKeyValue(
languageDropDown, new PropertyModelKeyValue(this, defaultValue),
keyValues, new ChoiceRendererKeyValue(key, value));
add(dropDownChoice);
}
public KeyValue getDefaultValue() { return defaultValue; }
public void setDefaultValue(KeyValue defaultValue) { this.defaultValue =
defaultValue; }
}
Thanks, Vimal.
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Re: DropDownChoice Default Value
On Sun, Jul 22, 2012 at 3:52 PM, vimalsymbi vimal_sy...@yahoo.com wrote:
Hi All,
I have searched and wasted much of my time figuring out the default Value
for DropDownChoice for Object as dropdown but couldn't find the solution.
For String dropdown i was able to make it work but somehow for object it
is not working.
Below is the Simple example that i have been trying,
DropDownChoicePage.html
and DropDownChoicePage.java files.
Can someone please help me that what am i missing into
DropDownChoicePage.java class that is not setting the Drop Down Default
value?
DropDownChoicePage.html
html xmlns=http://www.w3.org/1999/xhtml;
head
titleDropDown Example/title
/head
body
Select your favorite Language select
wicket:id=languageDropDown/select
/body
/html
---
DropDownChoicePage.java
public class DropDownChoicePage extends WebPage {
public class KeyValue {
private String key;
private String value;
public KeyValue(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public String getValue() {
return value;
}
public void setKey(String key) {
this.key = key;
}
public void setValue(String value) {
this.value = value;
}
@Override
public String toString() {
return getKey();
}
}
private static final long serialVersionUID = 2304448232406333188L;
private KeyValue defaultValue = new KeyValue(JAVA, Java);
/**
* Constructor
*/
public DropDownChoicePage() {
ListKeyValue keyValues = new
ArrayListDropDownChoicePage.KeyValue();
keyValues.add(new KeyValue(PHP, php));
keyValues.add(new KeyValue(JAVA, Java));
keyValues.add(new KeyValue(DOT_NET, Dot Net));
DropDownChoiceKeyValue dropDownChoice = new
DropDownChoiceKeyValue(
languageDropDown, new
PropertyModelKeyValue(this,
defaultValue), keyValues,
new ChoiceRendererKeyValue(key,
value));
add(dropDownChoice);
}
public KeyValue getDefaultValue() {
return defaultValue;
}
public void setDefaultValue(KeyValue defaultValue) {
this.defaultValue = defaultValue;
}
}
Thanks,
Vimal.
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If I had to guess I'd guess it's because your KeyValuePair class does not
properly implement either equals or hashCode. As I say many times during
my classes: don't get so distracted with how do I do this in Wicket that
you forget that this is just java.
--
Jeremy Thomerson
http://wickettraining.com
*Need a CMS for Wicket? Use Brix! http://brixcms.org*
Re: DropDownChoice default value not found because of equal method
Hi, I created a new database and now it works fine. Must have been an inconsistency in the development/test environment. Thanks Andrea 2008/7/30, Igor Vaynberg [EMAIL PROTECTED]: On Wed, Jul 30, 2008 at 3:02 AM, Andrea Jahn [EMAIL PROTECTED] wrote: Reason is, that the Country class contains an equal() method. Wicket calls this method, but the comparison of the id delivers false (different instances of the Integer object). this doesnt make any sense unless you do int1==int2, which you dont, you use equals which does not care about instance identity. so if your ids do not match you have another problem with your db somewhere. use the debugger and check that the values are actually the same. -igor - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DropDownChoice default value not found because of equal method
On Wed, Jul 30, 2008 at 3:02 AM, Andrea Jahn [EMAIL PROTECTED] wrote: Reason is, that the Country class contains an equal() method. Wicket calls this method, but the comparison of the id delivers false (different instances of the Integer object). this doesnt make any sense unless you do int1==int2, which you dont, you use equals which does not care about instance identity. so if your ids do not match you have another problem with your db somewhere. use the debugger and check that the values are actually the same. -igor - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DropDownChoice default value
On Sat, 26 Jan 2008, Mathias P.W Nilsson wrote: I have a dropDownChoice populated with Category objects. If it is the first time the page is rendered the Choose one is visible in the list. If I choose any category this item gets removed because it is not a Category object. How can I always have a Choose one option as the first item in my DropDownChoice? I think that there is a setting called nullValid or something like that (with a setter or overridable getter). Best wishes, Timo -- Timo Rantalaiho Reaktor Innovations OyURL: http://www.ri.fi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DropDownChoice default value
Thanks but it still does not work. I have set the setIsNullValid to true and
overrided the getDefaultChoice
@Override
protected java.lang.CharSequence getDefaultChoice(final Object selected){
return Test value;
}
But what happens then is that the null value is removed from the list. I
would like to have an option with id and a value of my choice in top.
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Re: DropDownChoice default value
On Jan 26, 2008 4:19 AM, Mathias P.W Nilsson [EMAIL PROTECTED] wrote:
Thanks but it still does not work. I have set the setIsNullValid to true and
overrided the getDefaultChoice
@Override
protected java.lang.CharSequence getDefaultChoice(final Object selected){
return Test value;
}
But what happens then is that the null value is removed from the list. I
would like to have an option with id and a value of my choice in top.
Make that something like:
@Override
protected CharSequence getDefaultChoice(Object selected)
{
return option value=\\This is the null choice/option;
}
If you would look at the source that Wicket spits out of your earlier
attempt, you'll see that Test value is actually printed, but as it
is not printed as an option, it is ignored (and is invalid even).
Eelco
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Re: DropDownChoice default value
Thanks alot! It works now. :jumping: -- View this message in context: http://www.nabble.com/DropDownChoice-default-value-tp15106932p15114359.html Sent from the Wicket - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
