Sorry for such a rudimentary question, but I am not experienced in Blend 4 much at all.
What I need to do, and based on the little I know or have seen it seems that Blend is the place to do it, is to create a "state" for a button to appear when it is disabled. i.e., the button I'm working with is a Sign Out button...the button IsEnabled property is bound to the WebContext.User.IsAuthenticated property. So, when the app is loading I want the button's "disabled state (<-- created in Blend?) to appear...once authentication is completed, the binding to IsEnabled will change, and I want the button's "enabled state" to kick in. How to accomplish this? Thanks in advance.
Your problem looks extremely similar to an issue I was having the other day.
If you go to this thread you may be able to use that as a solution: Expression Blend Interaction: How to set Trigger to Look for IsEnabled Value of Button?
I have a Boolean value there called "IsSavedAllowedBool". You would want to replace that with whatever bool you are binding to - which looks as if it might be WebContext.User.IsAuthenticated.
Related
I know that this question was already asked but I was not able to find a solution for my problem.
My question is this: I've a bindable property in a custom control that is exposed to show a text (the pagetitle), and I need that this text is cutted when the view is in portrait.
I want that this bindable property takes its value from a property inherited from a base (PageTitle) and than that a converter do the work to cut the word when it's needed.
I have created a datatrigger to fire that converter, but I think that I misunderstanded how it works, because on the first rotation all works as expected, but from the second rotation the Propertychanged delegate is fired twice and I didn't understand why.
I was able to solve this specific problem using a Label binded to the property that I use as parameter in my converter, but it's not a clean way to achieve the result and I would understand if something is wrong with my datatrigger and what.
I've a created a simple demo project published on git here that explains better what I mean, in the first row I've inserted the control with the bindable property that doesn't work, and in the thirth the solution that works but that it's surely not the best practice to do it.
Thank you in advance
I need to be able to trigger an event on change, but only when user focus out of the input text.
Is there any one event I can use?
I guess I can use a combination of both, by finding out which of them triggers last, and only use that, if the other has been called, but that introduces some complexity and clutters the code.
There's no single event that combines both of these concepts. You'll need to write some custom logic to do what you're describing.
Using the mx.managers.FocusManager getFocus() method you can find the component that currently has focus. In the change handler on the TextInput you can check if this TextInput currently is the component with focus. If not, you can go about your business.
I have two options. I need 48 of a certain type control; it needs to respond to clicks and taps (for touch devices).
I could use Buttons, using the TextButtonStyle, and the Click event. Or I could use TextBlock, with the Tapped event.
I reckon buttons may be more "expensive" to create. OTOH, although I believe "Tapped" is also called when the user clicks the component, this makes me a little nervous due to its nomenclature, I guess.
Another difference is that a button takes up only the width necessary, whereas a TextBlock takes everything; and I want the underlying Grid to be tappable, so the TextBlock is kind of a problem that way. Is there a property that will make it more modest like the button?
There is design guidance for Windows Store apps on when and how to use buttons at http://msdn.microsoft.com/en-US/library/windows/apps/hh465470. Based on your description and this guidance, it sounds like buttons are the way to go. Responding to click events is what they were made for, and TextBlocks add the extra issues that you describe.
I have a Flex TileList with an itemRenderer made by me.
The list loads the content perfectly and renders it.
Renderer is a simple canvas element with a checkbox and another canvas with some labels with data.
I implemented a method that, on TileList itemClick="clickedItemHandler(event)", changes the state of the checkbox (if checked -> uncheck, and vice versa).
Problem is: the method works if i click on any place of the item, EXCEPT the checkbox. When i click the checkbox, it doesn't change state.
My thoughts: maybe i was changing the state of the checkbox, and the event changing it back, but i debugged it and it doesn't look like so..
The solution is actually quite simple. Perhaps the best way to make this work is making sure the CheckBox ignores mouse clicks, and this can be done by setting the "mouseEnabled" attribute to false.
Cheers
I think you're probably correct. The checkbox toggles when you click it and then you toggle it back when the event gets to the TileList. You may not see this when debugging depending on how you are confirming... you may be able to fix this by confirming that the target of the event is not a CheckBox.
I am displaying a combo box in something of a WYSIWYG preview. I want the user to be able to click on the combo box and see the options inside, but I don't want them to be able to change the value. I tried using preventDefault() on the change event but it doesn't work. I don't want to disable it because I do want the user to be able to "look inside" the dropdown.
So I'm trying to block the change, but can't. My next resort is to change the selected index back to what it was before the change, Is there any way to do this within the scope of a ListEvent.CHANGE event listener?
Current Workaround is to basically re-assign the controls selected item the same way I am defining the selected item when I originally build it (a default selection). So a user sees their change then it immediately changes back to the default selection.
Are you sure that a combobox is what you want? could you do the same thing with a list component that is not selectable?
update:
If you must use a combobox and you dont want the lag from listening for the event and resetting the control, I see two possible options. You could subclass the control and make your own. When you do, hijack any methods that set the value besides the initial selection.
Or, you could try something like this: http://wmcai.blog.163.com/blog/static/4802420088945053961/. The site seems like it is in another language but the code is still there. It will allow you to make your options disabled, so the user cannot choose one of the other options.
HTH