I am currently trying to create a custom UINavigationBar Subclass.
What i want to achieve is that all custom navigationbars inside my app should have a couple of barbuttonitems in common. But it should still be possible to define left or .rightbarItems on the navigationItem in code.
What i tried so far is that subclassed the UINavigationBar and played around with all methods and delegate callbacks i could potentially use to change the navigationItem. There are methods like
setItems:animated:
setItems:
navigationBar:didPushitem etc.
.. which could be used to modify the navigationItem somehow.
But there is no callback which can be used to change the item initially.
What i basically want to know is how it is possible to change navigationItem initially before it is being pushed ?
Solved it by myself using
willShowViewController of the UINavigationControllerDelegateProtocol
to modify the navigationItem
Related
I am learning to create minecraft mods.
I would like to know how to make an entity teleport upwards when hit by a certain item. I have already made the item.
Override either Item#onLeftClickEntity(ItemStack, EntityPlayer, Entity) or Item#hitEntity(ItemStack, EntityLivingBase, EntityLivingBase). In that method set the target's Y position to whatever you want.
I think you might be able to use onLeftClickEntity. in the item class for your item, make a
onLeftClickEntity method. inside that method, it should be as simple as using motionY. untested though, and for 1.12.2.
so I am trying to drag around some images in a canvas.
I am adding eventlisteners to the components and calling startDrag() and stopDrag() to pick them up and stuff:
component.addEventListener(MouseEvent.MOUSE_DOWN, component.startDrag)
The problem is that it is selecting the image at its (0,0) location and not where I initially click on it. So there's a sudden "jump" when I click on the image. It is not smooth.
I noticed that startDrag() has two default parameters, one of them is lockCenter and it is default to false. Maybe do I set it equal to true somehow? (I don't know how to pass arguments to my second parameter in addeventlistener)
Another question: if I want to add more conditions to it, like make a new function that uses component.startDrag(), how do I pass the component to this function while adding event listener to it at the same time?
for example: I want to do:
component.addEventListener(MouseEvent.MOUSE_DOWN, some_other_function);
where some_other_function uses component.startDrag();
Thanks!
You should have your event listener call an event handler instead of start drag directly - that way you can pass arguments:
ie:
component.addEventListener(MouseEvent.MOUSE_DOWN, dragStartHandler);
public function dragStartHandler(event:MouseEvent):void{
component.startDrag(true);
}
You don't have to do all that. Use the DragManager. Here's a page to show you how:
http://www.switchonthecode.com/tutorials/simple-flex-drag-and-drop
I`m really new to Flex and ActionScript so please be patient with me.
I want to implement this script: tinyurl.com/yafqrqb
...that is doing this "magic" : tinyurl.com/y9qg32r
...but I want to tweak it a little on InfoWindowTabbedComponent. To be more precisely I`m trying to insert links in that tabs, and when you click one the state will change.
You can see my custom InfoWindowTabbedComponent at the end of the post As you can see, right now I have 2 functions that open url`s.
What I`m trying to do is to change this:
var adobeURL:URLRequest = new URLRequest("http://www.microsoft.com" );
navigateToURL(adobeURL, "_self");
Into something that change the current state.
Can you please help me?
Here`s my custom InfoWindowTabbedComponent: http://pastebin.com/f387bc3b9
I'm not sure I understand what you want to do. If you just want to set the selected Tab, instead of calling navigateToURL() set myTabNavigator.selectedIndex (or selectedChild)
If you really want to change the state, each component has a currentState property, but then you would have to define the states first (via the tag)
And if you really want to navigateToURL() you could navigate to javascript:somefunction() and then set the application state via ExternalInterface, but that would be horribly circumstantial.
Cheers,
Jörg
Flex 3 question:
I trying here to avoid having to bind resources to all my components labels ( ie a button) and find a way to have this automated.
Problem:
It corrupts the layout in design mode to bind directly in the mxml label="{resourceManager.getString('myResources', 'submit')}" and makes the design view useless. but when declaring bindings elsewhere, in actionScript or via a bind tag, it is counter productive and prone to many errors and miss.
Proposition:
I would like to create my own button that automatically invoke resources to localize a button label. So the author puts "Submit" in the mxml description of my button, and when running it would take the value of the label ie "submit" and use resourceManager.getString('myResources', 'submit').
but I can't find the way to override the set label function, Is it possible if yes how? else how can I go about it?
Maybe I am missing an essential process here that would make the use of resources more elegant, as well as how to override such thing as a button's label.
Thanks for your advices.
Create a component called MyButton, extending Button. Then use this:
override public function set label(value:String):void {
super.label = resourceManager.getString('myResources', value) || value;
}
Assuming the resource manager returns "null" or "undefined" this will work, and will only replace the value if it exists in "myResources".
If you don't want to override every component you need to do this with, then you can add a FlexEvent.CREATION_COMPLETE event on every component. Then use a single generic function to do your label localization.
I have 2 components for example (editor.mxml using mx:windows), when I click an edit button, I want to get the current value from the other component's datafield? (datagrid.mxml using mx:window)
I do know how to access the main MXML's datagrid by parentDocument or Application.application method, but stumped block if I want to access other way as mentioned above. Keep the code as simple as possible.
You could either do dependency injection, that is, give component A a reference to component B so that they can communicate directly (example of tighter coupling,) or have both components communicate through a common mediator using events (example of more loose coupling.)
Both of those options would be implemented wherever it is that you're creating those components (A and B in this example) and adding them to the display list.
This might be more complicated than it deserves, and it smacks of Pattern-Fever, but you could use a mediator class that listens for the CLICK event from the button and knows enough about the other component to query its property. It could even transmit that data using a custom event, which the button listens for.
While this involves three classes instead of two, it often turns out to be easier to have two components that focus on looking good and one that worries about coordination.
Cheers
Try this:
FlexGlobals.topLevelApplication
This points Your root. From the root You can grab every element You want.
You can also add an id to the custom component like this,
<custom:Editor id="myCustomComponent">
</Editor:AddressForm>
and
access your datagrid's value like this,
var data:ArrayCollection = myCustomComponent.DatagridID.dataProvider;