I jus Want to know, how could be possible to create Dynamic Components in Flex run Time.
For eg: creating a combo box with change Handler Dynamically, text box Dynamically,
Now, the value of combo box and textbox should place in a VO Class and the VO class also to be created Dynamically,
user have to provide how many fields they need and wat are the components needed and according to tat Dynamic VO has to Create in run Time,
Hope This is clear,
kindly suggest me a Example, Thankxxx in Advance
To create Dynamic class is tricky.
As per your requirement you want some combo box with change Handler, text box, etc.
Once you know what component you have to display according to vo which is been created dynamically.
You can create One custom component which contains your all required component (i.e. combo box, , text box, etc. )
or
Can create different custom component. Selection is yours.
There should be one parameter/condition, which will decide which component should be displayed at run time. Like adding switch case or your own logic.
While creating combo box you can add addEventListner in actionscript to handle change even and can dispatch custom event or can perform your defined operation.
In the same way you can addEventlistner to your custom component (ex. – text box, checkbox, etc.).
There should be unique key for all if user want to create combo box unique key should be 1(sample/any dynamic value can be retrived from VO), text box unique key should be 2, etc…. it will help you while creating dynamic component.
Make sure while creating component you have to use concept of set and get method for passing parameter.
Create only required component by using proper Flex component life cycle.
Hope this may help you bit as rough understanding.. or can search for better approach..
Related
I was looking through some Access templates, and bumped into the Task Database.
It uses a grid inside a form, but I can't understand what component it's using:
When I look in Design View I can only see a list of fields:
I guess this is pretty basic and sure it's covered in MSDN, but it seems I'm unable to find proper search keywords.
It's a Format Property of the Form.
In the Property Sheet, the property Default View must be set on Split Form.
You can choose whether the datasheet is on top or below the form by changing the property Split Form Orientation.
You can adjust the splitter to view the datasheet only and then hide the splitter handle by changing to No the property Split Form Splitter.
If you create a form on a table that has 1-M relationship with another table, MS-Access creates the form containing the fields of the "1" side as text boxe, etc. and for the M-Side, a tabular structure is created.
What is the name of the control representing the tabular structure? (it is some kind of a list but it is not like the list you select from the tool box!). This control does not have a click event. Why? It only has ON ENTER and ON LEAVE events, so how to capture the current row?
It is a form within the main form AKA sub-form. Although it appears to be a grid-view (Access call it datasheet view), it isn't. Therefore it does not have row based events. However, the sub-form has all the events like a normal form would.
There are few limitations in this "dataSheetView", no other controls are visible except text boxes. If you need a button, you must have a textbox with click events. Ideally place the textbox as first/last column so you have your action buttons.
Access also has a "ContinuousFormView" which can be decorated like a gridview with all custom controls. Again, they are forms and do not have row based events. Only control based or form based.
The object next to the question mark is a Subform/Subreport Container Control. As its name implies, it is a container that holds other objects which can be a table, query, form, or report. This control is also available for selection from the 'toolbox'.
Best to give the container control a name different from the object it holds, like ctrDocuments.
What do you mean by 'capture' the current row? A row is not referenced, fields and controls are referenced. Several ways to approach referencing fields and controls (if a form or report) of the dependent object. How depends on where you want to run the code. In a query? In the main form events? In the subform events? For example code in Click event of a button on the main form could be like:
strDoc = Me.ctrDocuments.DocPK
i have a data grid which is having two renderers. one is text box and other is dropdwon. both are mxml rendered.
My requiremnet is when user edit the textbox value in a particular row i should make the dropdown value also changed of that particular row.
Could someone help me on this.
thanks
If this is spark:
The ItemRenderer has a property owner which is the dataGrid - you'll want to add an eventlistener on this (from the combobox one) - presumably coming from the other renderer which you dispatch from the owner point of view (eg: in textboxitemeditor: owner.dispatchEvent(RendererEvent.CHANGE, value))
In this listener - when the appropriate data was edited, you can update your combo box appropriately.
The key when doing something like this, is to remember to remove the listener and any other references you create in the dispose() method.
If this is halo:
It's essentially almost the same as above, the difference is there is a baseListData object which has the owner reference from the renderer.
How do you go about creating a JTextfield with a drop down embedded into it? So you can use the drop down to select a value which will show up in the JTextfield. I am not looking for autocomplete but the ability to select and show values from combobox in the same textfield. For example a browser's url box and it can also act as a drop down showing urls that match it. I would like the drop down button to show up however.
If there is no specific reason of why you want to use JTextField, I suggest you to use an editable JComboBox. It is a combobox that you can type customized text on the top option field and also you have the ability of selecting the customized text and process it from combobox. Take a look at this example, it might be the solution that you are looking for: Editable ComboBox with Java
I'm working on a reporting app which displays incoming data as pie by default. We'd like to offer the user the ability to switch to bar, or column, or area, or any of the other charts with the click of a button. Since we already have the data in the app, it should be fairly simple no? Does anyone have an idea of how I might approach this?
andy
You can approach this a couple different ways. If it was me I would either set up a view stack with each of the chart types you want the user to switch to and they you can simply change the viewstack selectedIndex. Alternatively, you can have just a single chart holder container. Then just make function to dynamically generate each chart (Example). Then all you need to do is remove the existing and add the new chart.
I accomplish this by creating a state for each specific chart type. Then just change between states based on user input. You can use one data provider for each chart or create specific data providers for each.