I have an application w/ 2 side-by-side pages of text. I have the VDivided box set up so the user can drag it to make one of the documents bigger or smaller.
Is there a way to get the look of a VDivided box & the functionality of an Accordian, so that when the user clicks the VDivided box (or double clicks, I haven't decided) one of the documents will be hidden? (For instance, double clicking on the right-most side of the divider will hide the left document, and vice-versa)
In addition, if the user wanted to drag the divider, then they can do that as well.
I don't have much, but here it is so far:
<mx:HBox width="100%" height="100%">
<mx:HDividedBox width="100%" height="100%">
<s:TextArea height="100%" width="50%" id="left" />
<s:TextArea height="100%" width="50%" id="right" />
</mx:HDividedBox>
</mx:HBox>
Try changing the height of the vDividedbox, use also Resize effect to have a smooth resizing effect.
mx.effect.Resize
Related
I'm using the following code to load an image to the screen:
<s:Scroller xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="100%"
height="100%">
<s:VGroup width="100%" horizontalAlign="center" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalAlign="top">
<s:Label width="100%" text="Being Active" fontSize="14" fontFamily="Black"/>
<s:Image fillMode="scale" smooth="true" scaleMode="letterbox" verticalCenter="0" horizontalCenter="0" width="100%" source="#Embed('assets/img/q3/q3c1all.png')"/>
....
....
</s:VGroup>
</s:Scroller>
In the attached image, it has three images
1. Builder view
2. final design (what designer expects)
3. rendered output (what users will see)
Because of the scaleMode letterbox, there is lots of space above and below image is blanked. And this breaks out the layer. Can someone suggest how can I make the out put looks like design preview (titled Requirement)
How to scale the image proportionately without distorting (like its done in CSS).
To those who struggle with this issue - the solution is to use which will give you full control over the bitmap. One thing to note is - if you are planning to use interaction / events with the image, wrap it inside a container and add click event to it.
I dont know if this is best solution, but it worked for me :)
I have started learning flex 4 and I got myself thinking about how to change views. So I have a question what do people usually use - states or views (ViewStack). The type of web application I am making, can use both, but what do developers use in big projects or maybe they use non of the mentioned before?
Also I have a question about ViewStack. If I write:
<mx:ViewStack id="views" resizeToContent="true" verticalCenter="0" horizontalCenter="0" >
<s:NavigatorContent id="navOne">
<s:Label text="asdas" x="0" y="0"/>
</s:NavigatorContent>
then I can't change location of its child. Label remains in the center of the screen. If I remove vertical and horizontal center from ViewStack and put them in Label's tags, then label will be in top left corner but not in center. How do I control those locations?
As far as you're using Flex 4 you can prefer states. And there are at least two reasons for that:
Flex 4 states are much more declarative than in Flex 3.
Flex 4 hasn't Spark implementation of ViewStack and it is rather obsolete (necessarity of using NavigatorContent with Spark container is another proof of that fact).
The second part of the question. The problem is your ViewStack hasn't any size. So finally it has size of content (Label size). So verticalCenter and horizontalCenter are just alignment of your ViewStack. To control size and alignment of ViewStack you should care about sizes. Something like:
<mx:ViewStack id="views" resizeToContent="true" verticalCenter="0"
horizontalCenter="0" width="500" height="300" >
<s:NavigatorContent id="navOne" width="100%" height="100%">
<s:Label text="asdas" x="0" y="0"/>
</s:NavigatorContent>
I am using a mx:Resize effect to change the width of an image in Flex (leaving the height to look after itself) but I want the image to remain vertically centered on the page. Whilst I could calculate the aspect ratio of the photo, and work out the new y value to keep it centred, I would have to include a mx:Move effect too, and I am hopful that Flex has a simpler way.
This is for a photo gallery where images are loaded at run-time, and swapped about, so I really would like to avoid recalculating the aspect ratio and vertical position every time the updateComplete event fires. It seems so messy.
I tried putting my image inside a mx:VBox with verticalAlign="middle", thinking that the box would do all the centering for me, but this only seems to happen when the app first starts - i need it to gradually adjust the position during the period where the effect plays (to keep it central even when part-way through).
Here's a stripped-down example (which doesn't work):
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="600" height="600">
<mx:Resize id="fxResize" target="{imgPhotoA}" widthTo="350" duration="500" />
<mx:Button x="10" y="10" label="Resize" click="fxResize.play()" />
<mx:VBox id="boxPhotoA" x="100" y="20" height="500" width="350" verticalAlign="middle" borderStyle="solid" verticalScrollPolicy="off" horizontalScrollPolicy="off">
<mx:Image id="imgPhotoA" width="60" maintainAspectRatio="true" source="http://sstatic.net/so/img/logo.png"/>
</mx:VBox>
</mx:Application>
I am a newcomer to Flex, so apologies if I am doing something daft. Looking at the source of the Adobe example photo gallery hasn't helped me realise a solution - I don't think they use effects, but create their own routine to alter the size and position. The code looks horrid!
You could try creating an event handler for the effectEnd event of the Resize control, something that calls invalidateDisplayList on the VBox, something like:
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="600" height="600">
<mx:Script>
<![CDATA[
private function resizeFinishedHandler(Event:Event) : void {
boxPhotoA.invalidateDisplayList();
}
]]>
</mx:Script>
<mx:Resize id="fxResize" target="{imgPhotoA}" widthTo="350" duration="500"
effectEnd="resizeFinishedHandler(event)" />
<mx:Button x="10" y="10" label="Resize" click="fxResize.play()" />
<mx:VBox id="boxPhotoA" x="100" y="20" height="500" width="350" verticalAlign="middle" borderStyle="solid" verticalScrollPolicy="off" horizontalScrollPolicy="off">
<mx:Image id="imgPhotoA" width="60" maintainAspectRatio="true" source="http://sstatic.net/so/img/logo.png"/>
</mx:VBox>
</mx:Application>
Hope this helps.
Since the boss wanted this ready for tomorrow, I had to give up on the idea of Flex doing the work for me, and calculate the values myself.
Note that I knew that all my JPGs were 120px wide, but the heights could vary. This made horizontal positioning easy, so its only the vertical positioning I will refer to below...
PART ONE
Every time the complete event fired on an image object (i.e. a JPG was loaded into it) I set its position based on its height. Assuming the centreline was a line 300 px down from the top of the screen, I used:
oImage.y = 300 - (oImage.contentHeight / 2)
I avoided the updateComplete event as it seemed to fire off hundreds of times when an effect moved/resized the image. I also avoided the height property (in favour of contentHeight) as I found a strange issue with the image tag whereby I had to set its height to a value (I only wanted to set the width really) in order for the resize effect to actually do anything. I used height="999" and let the image take care of its own aspect ratio.
PART TWO
Just before I called the play() method on my effects, I had to set the yTo value for each move effect, to ensure the image would move to the correct vertical position to take into account it being resized at the same time (e.g. if image shrinks, it needs to be moved down slightly).
For each image, I needed to work out the aspect ratio and then I could calculate what the new height of the image would be after resizing.
private function calculate_yto_value(oImage:Image, iWidthAfterTheEffect:int):int {
var iAspectRatio:Number = oImage.contentHeight / oImage.width
var iHeightAfterTheEffect:Number = iAspectRatio * iWidthAfterTheEffect
return 300 - (iHeightAfterTheEffect / 2)
}
fxMovePhoto.yTo = calculate_yto_value(imgPhotoA, 60)
I'm currently learning Flex, and am having the hardest time getting scroll bars to work. In short, I'm making a giant form for users to fill out, contained within a viewstack component. The user will type up information in one view, and it will be displayed in the other. But right now in the first canvas I have components that run off the screen and flex doesn't automatically add a scroll bar, so I added 'verticalScrollPolicy="on"' to my canvas. Now, while it gives me a scroll bar, it gives me an empty scroll bar. I still cannot move it up or down, meaning components are still trapped off the bottom of my screen. Am I missing something simple?
Edit - I'm using Adobe Flex Builder 3, and the components it lets you drag in. http://img12.imageshack.us/img12/218/problem1f.jpg This is a picture of the problem, and i guess relavent code would be.
<mx:Application xmlns:mx="adobe.com/2006/mxml" layout="absolute" width="830" height="835">
<mx:ViewStack x="10" y="72" id="viewstack1" width="790" height="751" >
<mx:Canvas label="Design Mode" width="100%" height="100%" verticalScrollPolicy="on" horizontalScrollPolicy="on" >
(Components inside)
</mx:Canvas>
I think the problem is in the way the content in your canvas determines it's height.
If I do this:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:ViewStack width="500" height="500">
<mx:Canvas width="100%" height="100%">
<mx:Canvas width="100" height="1000" backgroundColor="#ededed" />
</mx:Canvas>
</mx:ViewStack>
</mx:Application>
I get scrollbars - Canvas has a default horizontalScrollPolicy and verticalScrollPolicy of auto, meaning it'll show the scrollbars as needed. I think, for whatever reason, the outer canvas isn't detecting that the content is taller than it should be.
if it can help some one : some related problem
Here's a problem I keep running into:
I have a lot of situations where I need to display some text with a styled container like so:
<mx:Canvas>
<mx:Text text="{text}" left="5" verticalCenter="0" right="5" />
</mx:Canvas>
As you can see - the text in constrained by the left and right margins of the canvas and I have not specified a height for the text control because I want it to grow vertically when I add text to it. Reason being - if there is one line of text I want it to display in the center of the canvas but if there are two or three lines of text I want the text control to show those two or three lines of text.
What keeps happening however, is that it will only display one line of text - no matter how many times I call invalidateSize() on it or the container. What do I do?
CAVEAT: The canvas height and width is set by the component that instantiates it (this is all wrapped up in a custom component) so I can't explicitly set the width or height of the text control...
NOTE: Ok, maybe it's an easy fix because as I was typing this question I figured it out - but, here's a chance to answer an easy question!?
The Text component needs a width if you want it to automatically wrap for you. If you used a string with newlines in it it will work grow as you expected without a width. For you, use:
Edit: Ok, you want it centered in a canvas of varying size. Then you can:
<mx:HBox
width="500"
paddingLeft="5"
paddingRight="5">
<mx:Spacer width="100%" />
<mx:Text
width="100%"
text="{text}" />
<mx:Spacer width="100%" />
</mx:HBox>
Take a look at the TextArea component.