kandi X-RAY | OpenFaces Summary
kandi X-RAY | OpenFaces Summary
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Trending Discussions on OpenFaces
I want to select an arbitrary amount of items from a list of arbitrary length. A dropdown (QComboBox) doesn't allow checkable items. A list of checkable items would become clumsy with a lot of items.
I found this question in the User Experience SE subsite and this answer seems to be the solution that best suits my needs. It has many names, as a comment in said answer remarks: Dual List, Accumulator, List builder, TwoListSelection ...
The version from OpenFaces.org shown in the answer linked above:
I couldn't find an implementation in Qt, though. Should I implement it myself or is there an implementation available in Qt? Is there a recommended approach?...
ANSWERAnswered 2019-Oct-11 at 21:08
This widget does not come by default in Qt, but it is not complicated to build it, the first thing you should do is list the requirements:
The button with text >> is enabled if the list on the left is not empty, if pressed it must move all the items.
The button with text << similar to the previous one but with the list on the right
The button with text > is enabled if an item in the list on the left is selected, if pressed, the selected item should be moved to the right one.
The button with text < the same but for the right side.
The button with "up" text is enabled if an item is selected and this is not the first item in the list. when pressed you must move the current item to a higher position.
The button with "down" text is enabled if an item is selected and this is not the last item in the list. when pressed you must move the current item to a lower position.
As we see most of the logic depends on the selection of items, for this we connect the signal
itemSelectionChanged with the slot that decides whether the buttons are enabled or not.
To move items we must use
addItem(), the first removes the item and the second adds it.
Moving up or down is equivalent to removing the item and then inserting it, for this we use
takeItem() again with
All the above is implemented in the following widget:
I want to validate that an input is strictly numerical consisting of between 10-16 characters long. Based on the user input value I was going to have a message appear below the input field. The problem is, when I go to use
to help accomplish this, it causes the app to throw an exception.
I am new to JSF and I am having a difficult time thinking of ways to debug the application. The scope of my work is supposed to only really include UI enhancements for now... So I'd like to avoid using a validator class if possible.
here's the troublesome code. Note: if i remove the tag or comment it out, the page that I'm working will reload without issue. Currently, due to the app throwing an exception, the page app will not deliver any code to a requesting browser....
ANSWERAnswered 2019-Sep-05 at 19:20
I fixed the regex which was causing the error. Per the comments, there were at least two culprits causing a problem the
& and the
<. However, just fixing those did not fix the issue. Here's what i did to fix the input.
No vulnerabilities reported
You can use OpenFaces like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the OpenFaces component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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