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swing: identifying dynamically generated controls
Hi experts,
I need your help in figuring this out.The issue is how to change attributes of controls that has been dynamically generated. The first challenge seems to be able to get the name/id of the component. How do you guys recommend I do this?
example : User can select a number between 1 to 10. If 7 is selected. I want to create seven controls(Textfields). After generating all of them, I have to set the size and other attributes based on some rules. How can I get the fifth text box and set it the color to red? setname is one attribute I thought of using to solve this. Whats the best way to do this?
Thanks
I need your help in figuring this out.The issue is how to change attributes of controls that has been dynamically generated. The first challenge seems to be able to get the name/id of the component. How do you guys recommend I do this?
example : User can select a number between 1 to 10. If 7 is selected. I want to create seven controls(Textfields). After generating all of them, I have to set the size and other attributes based on some rules. How can I get the fifth text box and set it the color to red? setname is one attribute I thought of using to solve this. Whats the best way to do this?
Thanks
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Just use an array and address by index
JTextField[] fields = new JTextField[];
for(int i = 0;i<fields.length;i++) {
fields[i] = new JTextField();
}
fields[4].setText("I'm number five!");
Using name is the usual method used, you can then use a Map to make it easy to lookup any component you need.
objects.... how can you access the name since the name is also dynamically generated with the component? I have done this before in javascript because it has evaluate command.
CEHJ thanks for that suggestion. I am sure it will work. For some reason I drew blank and thought that once you add to an array it can't be added to the Jpanel and made visible. Sounds stupid I know. I will try it out and let you guys know.
CEHJ thanks for that suggestion. I am sure it will work. For some reason I drew blank and thought that once you add to an array it can't be added to the Jpanel and made visible. Sounds stupid I know. I will try it out and let you guys know.
>>it can't be added to the Jpanel and made visible.
Yes, it's fine, it can. If you want to set the name of the component, though what you'd need it for i'm not sure, you'd do:
Yes, it's fine, it can. If you want to set the name of the component, though what you'd need it for i'm not sure, you'd do:
fields[i].setName(String.format("Field%d", i));
sorry Objects.. I kind of missed what I wanted to say. I meant to say that I use this approach when I was using object oriented javascript. However I didnot use maps in swing. So I didnot understand your solution very well. Did you mean a action map? or something else. I will need more direction and example. I can learn something new.
> since the name is also dynamically generated with the component?
you can set the name to whatever you want
component.setName("whateve
You could then use a Map to store your components
Map lookup = new HashMap();
lookup.put(component.getNa
Then when you need a component you can look it up by name
JComponent component = lookup.get("whatever");
So you can now easily access your components by name, nice and easy :)
you can set the name to whatever you want
component.setName("whateve
You could then use a Map to store your components
Map lookup = new HashMap();
lookup.put(component.getNa
Then when you need a component you can look it up by name
JComponent component = lookup.get("whatever");
So you can now easily access your components by name, nice and easy :)
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