In the MX TabBar component, the iconField property allowed us to display different icons in each tab. In Spark, there does not seem to be an inherent way to add icons to the TabBar. Does anyone have an example of implementing icon support for Spark's TabBar? Is there a way to do this without extending the component?
Many thanks!
Hey after spending a week trying to follow multiple ways, (yours being top of the list) i found out a simpler and effective way to add icons to my tab bar, or any other component using skinning.
You dont need to create a custom component, just passing the icon and label through data.
http://cookbooks.adobe.com/post_Tutorials_for_skinning_Spark_ButtonBar_component_w-16722.html
As personally, i was using content navigator with my tabbar/viewstack, i passed the icon as icon instead of imageicon. you can make changes accordingly.
You'll have to create a skin for adding icons to Spark components; it is not as straightforward (IMHO) as Flex 3's MX components, though much more extensible.
Here are a few links which might help you get started:
Tour de Flex Tabbar examples
Custom Skin on Tabbar
Flex Tabbar with Skin
I believe I've come up with a solution, which I'm posting below for posterity. If anyone has a better way, I'd much appreciate the suggestion.
<!-- main app: TabBar implementation -->
<s:TabBar
dataProvider="{contentTabBarPrimaryDP}"
skinClass="skins.ContentTabBarSkin"/>
<!-- skins.ContentTabBarSkin: ItemRenderer implementation -->
<s:DataGroup id="dataGroup" width="100%" height="100%">
<s:layout>
<s:HorizontalLayout/>
</s:layout>
<s:itemRenderer>
<fx:Component>
<custom:IconButtonBarButton
label="{data.label}"
icon="{data.icon}"
skinClass="skins.ContentTabBarButtonSkin"/>
</fx:Component>
</s:itemRenderer>
</s:DataGroup>
<!-- skins.ContentTabBarButtonSkin: icon implementation -->
<s:HGroup
gap="3"
paddingBottom="3"
paddingLeft="3"
paddingRight="3"
paddingTop="3"
verticalAlign="middle">
<!--- layer 2: icon -->
<s:BitmapImage id="iconDisplay"
left="5"
verticalCenter="0" />
<!--- layer 3: label -->
<s:Label id="labelDisplay"
textAlign="center"
verticalAlign="middle"
maxDisplayedLines="1"
horizontalCenter="0" verticalCenter="1"
left="10"
right="10"
top="2"
bottom="2">
</s:Label>
</s:HGroup>
This solution uses a custom DTO object for the TabBar dataProvider which stores the label text as well as the embedded icon image as a class. I also had to extend the ButtonBarButton component to add an iconDisplay SkinPart, which looks like this:
[SkinPart(required="false")]
public var iconDisplay:BitmapImage;
This class also has getters/setters for the icon class property and sets the icon source, as such:
public function set icon(value:Class):void {
_icon = value;
if (iconDisplay != null)
iconDisplay.source = _icon;
}
override protected function partAdded(partName:String, instance:Object):void {
super.partAdded(partName, instance);
if (icon !== null && instance == iconDisplay)
iconDisplay.source = icon;
}
It's seems to be a bug/missed functionality of the your SDK version:
http://forums.adobe.com/thread/552543
http://bugs.adobe.com/jira/browse/SDK-24331
Anyway, thanks for the solution with skins - very helpful
Related
As stated, I'm trying to obtain column headers consisting of an icon and wrappable text in a flex AdvancedDataGrid.
(EDIT: I forgot to mention an important part of the context: the columns are added dynamically, in actionscript. This apparently changes the behavior.)
I've tried using a custom mxml headerRenderer, like so:
<mx:headerRenderer>
<fx:Component>
<mx:HBox width="100%"
height="100%"
verticalAlign="middle">
<mx:Image source="<image_url>"
width="10%"
height="100%"/>
<mx:Text text="{data.headerText}"
width="90%"
height="100%"/>
</mx:HBox>
</fx:Component>
</mx:headerRenderer>
but for some reason, the text here is truncated instead of wrapped (it works outside of a renderer).
I've also tried creating a subclass of AdvancedDataGridHeaderRenderer and overriding createChildren to add the icon:
override protected function createChildren():void
{
var icon:Image = new Image();
icon.source = <image_url>;
icon.width = 16;
icon.height = 16;
addChild(icon);
super.createChildren();
}
but then, the icon and the text get superimposed.
I'm out of ideas on this. Anyone else?
It worked for me when I removed the height="100%" attribute from mx:Text in your headerRenderer.
UPDATE: it only works like this when I manually stretch the AdvancedDataGrid component. I'll look into how to make it work unconditionally.
When the height of the Text component was set to 100%, it was constrained to its parent HBox's height. Therefore when a word was wrapped and moved to the next line, it wasn't visible because the height of the Text component didn't allow for it to be visible.
If you remove this constraint, Text component's height will be determined dynamically based on its contents, as will headerRenderer's. Also add minHeight to your Text so that it is visible when it's loaded.
Here's the code (I also removed scrollbars because they were showing during resize):
<mx:headerRenderer>
<fx:Component>
<mx:HBox width="100%"
height="100%"
verticalAlign="middle"
horizontalScrollPolicy="off"
verticalScrollPolicy="off">
<mx:Image source="<image_url>"
width="10%"
height="100%"/>
<mx:Text text="{data.headerText}"
width="90%"
minHeight="20"/>
</mx:HBox>
</fx:Component>
</mx:headerRenderer>
In case anyone is interested in how to do this with dynamically created columns, a combination of Hunternif's code for the renderer and some added code on column creation worked for me:
The columns need to have fixed widths and need to be invalidated to inform the AdvancedDataGrid that it needs to rerender:
var cols:Array = [];
for each (...) {
var column:AdvancedDataGridColumn = new AdvancedDataGridColumn();
...
// Fix the width of created columns
column.width = 150;
cols.push(column);
}
grid.columns = cols;
// Invalidate columns so that sizes are recalculated
grid.mx_internal::columnsInvalid = true;
// Take changes into account
grid.validateNow();
I am using a DividedBox in Flex which contains only a datagrid at first. When I click on an Item on the Datagrid, a second element with a width of 0% (Spark Group) is added to the divided box to display an image.
The thing is, when the second element is added to the DividedBox, the image is partially displayed outside the DividedBox, and I don't want to have this behavior.
Here is the interesting code :
<mx:DividedBox direction="horizontal" id="divider" borderColor="red" borderStyle="solid" borderVisible="true" right="10" left="10" top="10" bottom="10">
<s:Group width="100%" height="100%">
<!--datagrid-->
</s:Group>
</mx:DividedBox>
And here is the piece of code that adds the second child of the dividedBox (simplified code) :
private var _pdf_preview:Group = new Group();
[Bindable]
[Embed(source="assets/image/llama.jpg")]
private var imgClass:Class;
protected function itemOnClickHandler(event:MouseEvent):void
{
_pdf_preview = new Group();
var img:Image = new Image();
img.source = imgClass;
_pdf_preview.addElement(img);
_pdf_preview.percentWidth = 0;
divider.addElement(_pdf_preview);
}
And here is a screen of the problem (Btw, don't notice my skills on Gimp :) ). As a new user I can't bind images to my post : screen showing my problem the red border show the limits of the dividedBox
Thank you.
I hope there are not too much fault, english is not my native language. Sorry for any english mistakes.
PS : I couldn't add the "DividedBox" tags because it was not existing before, and I'm a "new user" so I can't create new tags.
You can use the clipContent property to cut off the image at the edge of the DividedBox:
<mx:DividedBox clipContent="true" />
When using Spark containers, clipAndEnableScrolling is the property you need to achieve the same goal.
I would also like to note that you usually don't require to dynamically add components through ActionScript. You can use 'states' instead. For example:
<s:states>
<s:State name="normal" />
<s:State name="image" />
</s:states>
<mx:DividedBox clipContent="true">
<s:DataGrid />
<s:Image includeIn="image" />
</mx:DividedBox>
Now all you need to do to show the Image, is set the currentState to image.
How do I get corner radius on my TextInput component in Flex 4.
<s:TextInput prompt="username" width="150" maxChars="100" id="txt_username"
color="#000000"/>
Create a custom skin (possibly by copying spark TextInputSkin) and add a border graphic with rounded corners, like this:
<!-- border -->
<s:Rect id="border" left="0" right="0" top="0" bottom="0"
radiusX="10" radiusY="10">
<s:stroke>
<s:SolidColorStroke id="borderStroke" weight="1" />
</s:stroke>
</s:Rect>
If you want more special rounded corners you can also use these attributes:
topLeftRadiusX="4" topLeftRadiusY="8"
bottomLeftRadiusX="2" bottomRightRadiusY="10"
The default TextInputSkin does not allow for rounded corners, so there is no style that you could set on your TextInput to do it. So, no, there's no other way than creating a custom skin class.
You could take it a step further and make it dynamic. Create a custom TextInputSkin based on spark TextInputSkin and in the updateDisplayList method add this code above the super.updateDisplayList() call.
In YourTextInputSkin.mxml,
// in updateDisplayList()
if (getStyle("cornerRadius")!==undefined) {
border.radiusX = border.radiusY = getStyle("cornerRadius");
background.radiusX = background.radiusY = getStyle("cornerRadius");
}
That's it. You're done!
Now to use it add a CSS class selector to add a cornerRadius style like so:
/* set the Textinput.styleName to this style */
s|TextInput.roundedInput
{
contentBackgroundAlpha: .4;
contentBackgroundColor: #000000;
cornerRadius: 10;
skinClass: ClassReference("view.skins.TextInputRoundedSkin");
}
And set your instance to the class,
<s:TextInput styleName="roundedInput"/>
Unfortunately, you can't set the cornerRadius style on TextInput component instance in MXML. Should Flex support a styles tag for this type of thing like HTML tags do? Should styles declared in the Skin be proxied to the component using them? Currently the Flex compiler would throw an error if you declared a style in the Skin and tried to use it on the component instance even though it's valid to declare that style and any other style in the CSS. What about if UIComponents had a style proxy object that let you set styles? Anyway, I digress.
If you want to make that style available on the TextInput instance in addition to the previous methods you can do that by extending TextInput and adding the cornerRadius style metadata to it. You can also set the skinClass (inline or in a defaults.css file in the library) while you're at it.
Something like this:
<?xml version="1.0" encoding="utf-8"?>
<s:TextInput xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
skinClass="TextInputRoundedSkin" >
<fx:Metadata>
[Style(name="cornerRadius", inherit="no", type="uint")]
</fx:Metadata>
</s:TextInput>
To use,
<local:MyExtendedTextInput cornderRadius="8" />
In the future you won't have to declare the CSS.
I have a UIComponent (tried it also with Canvas) and some icons in it (sub views). On the UIComponent I defined some extra ContextMenuItems.
Now when I'm testing it, the context menu appears only on the subviews (icons) with a right-click.
I've checked the documentation but found nothing about required properties for using context menus.
Do you have any ideas why it's only on subviews?
This is probably happening because your UIComponent's (or Canvas') graphics are clean/empty. If the component doesn't have any "content" it will act as transparent, which means the click event will not be caught.
If you are using a Canvas there's a simple way to check this out, try to add some background color and it should work:
<mx:Canvas backgroundColor="#FFFFFF" backgroundAlpha="0.001"/>
I think this is what you're looking for:
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark"
creationComplete="onCreationComplete()">
<fx:Script>
<![CDATA[
private function onCreationComplete():void
{
var menu:ContextMenu = new ContextMenu();
menu.customItems.push(new ContextMenuItem('weee'));
menu.customItems.push(new ContextMenuItem('weee2'));
menu.hideBuiltInItems();
canvas.contextMenu = menu;
}
]]>
</fx:Script>
<mx:Canvas id="canvas" backgroundColor="#000000" height="50%" width="50%" >
<s:Button label="blarg" />
</mx:Canvas>
</s:Application>
Notice how I'm creating a menu, then adding items, which then replaces the contextMenu property. This should work on any object that extends InteractiveObject.
What the problem was is the mouseEnabled="{false}" property in one of the parent-parent containers. I removed it and it works now.
I am having a hard time figuring this out...
How do you scroll an editable TextArea (Flex Hero) on a touch device?
I am referring to the situation where the text does not fit in the TextArea height.
When I try to tap and drag the text gets selected and not scrolled... Am I missing a something here? I am using verticalScrollPolicy = on (also tried auto).
I am testing the code in the Blackberry Playbook simulator (my targeted device for my app).
If you have any hints or suggestions please let me know.
Thanks,
A TextArea is an editable component. You should try using RichText instead if you don't want to edit the text.
Put it in a s:Scroller:
<s:Scroller id="prayerSc" width="100%" height="100%">
<s:RichEditableText id="prayerText" width="100%" height="100%" clipAndEnableScrolling="true" selectable="true" editable="true" textFlow="{PTFL}" />
</s:Scroller>
RichEditableText is not optimized for mobile
Use this instead Orig source
import spark.components.supportClasses.MobileTextField;
private var cnt:int = 0;
protected function addText():void
{
ta.appendText('More text... ' + cnt++ + '\n');
MobileTextField(ta.textDisplay).scrollV++;
}
<s:TextArea id="ta" width="95%" height="200" editable="false"/>