I want to add a component into a Viewstack dynamically in flex4. Like code below
for(var i:int = 0; i < 3; i++)
{
var canvas:NavigatorContent = new NavigatorContent();
canvas.label = "XXX";
// here I want to add effect to canvas.
// var effect:Fade = new Fade(canvas);
// effect.duration = 2000;
viewStack.addChild(canvas);
}
But the code in comment doesn't play the effect. How can I implement it? Does the canvas have any hideffect or showeffect to Bind？
thanks
You can use the NavigatorContent's hideEffect and showEffect properties.
FlexExamples has a good example on how to set these properties using Actionscript.
Well I think the problem is he is creating the Effect Object inside the function. As soon as this function is left, I think there is no reference from the canvas object to the effect object and the GarbageCollection cleans it up. Try explicitly saving a reference to the effect object.
Related
I'm looking for some method to change grid column's width (or row's height) by animtion defined in Storyboard. I have already found some solutions for WPF apps, but they are all useless in case of Windows Store programming, eg.:
Grid Column changing Width when animating
how to change the height of a grid row in wpf using storyboard
http://www.codeproject.com/Articles/18379/WPF-Tutorial-Part-2-Writing-a-custom-animation-cla
Is such result obtainable by creating a custom class, inheriting from Timeline? If so, which components should be overrode for proper implementation?
You should be able to use a simple DoubleAnimation. Make sure to set EnableDependentAnimation=True, as outline here.
One thing to realize when trying things out is that ColumnDefinitions are a GridLength struct. You can find more information on them here. You will need to have the animation set the Value property.
Here is a sample method to animate a Grid ColumnDefinition MaxWidth.
private void Animate(ColumnDefinition column)
{
Storyboard storyboard = new Storyboard();
Duration duration = new Duration(TimeSpan.FromMilliseconds(500));
CubicEase ease = new CubicEase { EasingMode = EasingMode.EaseOut };
DoubleAnimation animation = new DoubleAnimation();
animation.EasingFunction = ease;
animation.Duration = duration;
storyboard.Children.Add(animation);
animation.From = 1000;
animation.To = 0;
animation.EnableDependentAnimation = true;
Storyboard.SetTarget(animation, column);
Storyboard.SetTargetProperty(animation, "(ColumnDefinition.MaxWidth)");
storyboard.Begin();
}
I have a RichEditiableText component in a Flex 4.5 project and I want to print its contents. The problem I'm having is that component is holding a TextFlow and the copy is being clipped at the beginning/ending of pages. I can't seem to get it to respect the page breaks consistently.
I have this piece of code that adjusts the scroll position of the the RichEditableText component in a loop. Is there a better/smarter way to do this so that I ensure the text breaks to a new page appropriately?
if(richEditTextComponent.contentHeight <= printJob.pageHeight) {
printJob.addObject(richEditTextComponent, FlexPrintJobScaleType.NONE);
} else {
var max:Number = richEditTextComponent.contentHeight;
var i:Number = 0;
while(i<max) {
printJob.addObject(richEditTextComponent, FlexPrintJobScaleType.NONE);
richEditTextComponent.verticalScrollPosition += printJob.pageHeight;
i+=printJob.pageHeight;
}
}
Just for anyone else that has this problem...I ended up simply passing the copy to Javascript to handle printing. Turns out TLF is pretty cumbersome for type of thing.
I have written some code to hide specific markers in our maps based on checkboxes outside of the map itself. However, these markers also have vector features too (really on separate layers) but I want to just hide the features rather than destroy them. I tried using display(false) but get errors. Is there a function for hiding vectors?
Solution
Change the style property for OpenLayers.Feature.Vector instances. Set the display attribute to none or the visibility attribute to hidden. Redraw the layer afterwards.
According to comments in OpenLayers code:
display - {String} Symbolizers will have no effect if display is set to "none". All other values have no effect.
Example Code
For a given OpenLayers layer variable called layer, you could hide all the features as follows:
var features = layer.features;
for( var i = 0; i < features.length; i++ ) {
features[i].style = { visibility: 'hidden' };
}
layer.redraw();
This iterates over all features in a layer, allowing full control of the specific features to hide.
I have wrestled with OpenLayers a few times trying to get my features within the same layer to display exactly as I want. #igorti's solution overrides all of the feature's style properties, so I don't recommend this approach unless you have no reason to re-display the feature later on (in which case the removeFeatures() method is probably a better way to do this anyways).
Hiding Vector Features
The way I do this is to manually set the feature's style display to none and then redraw the layer. If I need to display the feature again, set the display property to block. Pretty simple:
function hideFeatures() {
var features = layer.features;
for (var i = 0; i < features.length; i++) {
var feature = features[i];
if (!isVisible(feature)) {
feature.style.display = 'none';
}
}
layer.redraw();
}
Re-Displaying Vector Features
Re-displaying hidden features is a little bit trickier depending on your situation. Take a look at the OpenLayers documentation on styling for some possibilities. But in general, if I need to display the feature again, I set the feature's style attribute to null. This ensures that when the OpenLayers renderer performs the drawFeature function, your pre-configured styles from your layer's styleMap are redrawn:
// from OpenLayers drawFeature()
if (!style) {
style = this.styleMap.createSymbolizer(feature, renderIntent);
}
So your display function might look something like this:
function displayFeatures() {
var features = layer.features;
for (var i = 0; i < features.length; i++) {
var feature = features[i];
if (isVisible(feature)) {
feature.style = null; //redraw the feature
}
}
layer.redraw();
}
Other Approaches
There are a couple other approaches to doing this. You can set the feature's fillOpacity and strokeOpacity to 0, like so:
function displayFeatures() {
var features = layer.features;
for (var i = 0; i < features.length; i++) {
var feature = features[i];
if (isVisible(feature)) {
feature.style.fillOpacity = 1;
feature.style.strokeOpacity = 1;
}
else {
feature.style.fillOpacity = 0;
feature.style.strokeOpacity = 0;
}
}
layer.redraw();
}
The downside to this approach is that any active map controls will still be able to interact with the "hidden" feature, so if a user accidentally clicks or hovers over the feature these events will still fire.
You can also create a style within your layer's styleMap called hidden, with either of the two approaches above. Then to hide a feature, simply change the feature's renderIntent to hidden.
Finally, you can add subsets of your features to separate layers, and call the layer's setVisibility method to false. This is only a good option if you don't have a need to interact with all features concurrently, since only controls for the top layer of your map will be active. (There are ways to use controls for multiple layers, but there's a lot more juggling involved and I don't recommend it unless it is absolutely necessary)
You can set display:'none' in style property. So that features will not be display
To hide features
for( var i = 0; i < features.length; i++ ) {
features[i].style = { display: 'none' };
}
layer.redraw();
To display back the hidden features
for( var i = 0; i < features.length; i++ ) {
features[i].style = null;
}
layer.redraw();
To hide the one feature
var feature = vectorlayer.getFeatureByFid(fid);
feature.style = { display: 'none' };
vectorLayer.removeFeatures(feature);
vectorLayer.addFeatures(feature);
It was not clear from your question whether you've already tried it, but if you haven't you might try the setVisibility() method.
Reference: http://dev.openlayers.org/releases/OpenLayers-2.10/doc/apidocs/files/OpenLayers/Layer-js.html#OpenLayers.Layer.setVisibility
Here is what I finally done for this matter as I had the same need but didn't want to hide each feature individually or play with CSS style:
I'll assume that you have something like the following somewhere:
myVector = new OpenLayers.Layer.Vector(...
Then link this code to the button or whatever event you need:
if( myVector.getVisibility() && myVector.features.length > 0 ) {
myVector.setVisibility(false);
} else {
myVector.setVisibility(true);
}
getVisibility() / setVisibility() references are missing from vector part but are in layer documentation.
I have a function I wrote that gets the height of the application without scrolling. Meaning the height it would need to be to not have to scroll.
This is the function:
private function getContentHeight():Number
{
var height:Number = 0;
for(var i:uint = 0; i<this.numChildren; i++)
{
var d:DisplayObject = this.getChildAt(i) as DisplayObject;
//trace(d.name+":"+d.height);
height += d.height;
}
height += Number(this.getStyle('verticalGap'))*this.numChildren;
height += Number(this.getStyle('paddingTop'));
height += Number(this.getStyle('paddingBottom'));
return height;
}
This function works well but the problem is knowing when to call it. I planned on calling it after I add/remove any children from it. However thats still too soon because I don't get the correct height yet if I run it then. The fix I currently have is using a Timer to call the function about 300 milliseconds after a child is added/removed which seems to work well but I think this is a very risky fix. So I was wondering a better solution. I am thinking there has to be some sort of event I can listen for that will tell me when its ready for me to run this function, I just don't know what event that would be?
Thanks!
First of all, take a look at measuredWidth and measuredHeight properties of UIComponent (so all the controls and containers have these properties), flex already measures required width/height of the containers.
Secondly, the right place to look at this properties are creationComplete and updateComplete events. In your case, if you add some children programmaticaly, you should handle updateComplete event after you've added you children.
I've been playing around with different methods of determining at runtime the width of a "label" so that I can resize the "label" because I don't want it to truncate. I've finally found an easy solution through UITextField which allows me to set the .autoSize which is great! However, now I'm trying to "style" (simply adjust font and font size) of the UITextField but it seems that I have to do it manually with '.htmlText' (which I'll gladly accept if that is the ONLY way).
I'm using the .text to set the value of the label.
My test case involves a HBox (I'm actually using a Grid but they should be the same and I've done testing on both):
I style the HBox and the style carries through to the UITextField. I don't believe this will work for me because I have other components inside that I need to style differently.
I've tried: UITextFormat and TextFormat (I see that the .htmlText being updated accordingly but the output doesn't update. Then I noticed that whenever I called hbox.addChild(myUITextField) it would override the .htmlText
I've tried setting the style with myUITextField.setStyle("fontSize", 20) before and/or after the call to addChild neither of which made an impact on the display as per what I noted above.
Changes are being made but they seem to be overrided when I add it to the display.
So what do I need to do in order to style the UITextField aside from manually setting it along with my contents in .htmlText? Solutions not using UITextField is fine as long as there is some easy way of not truncating the text.
EDIT: I want to just do textField.setStyle('fontSize', 20) and expect that every time I change the text, I wouldn't need to use HTML to go with it (so I can just do textField.text = 'something else' and expect that it will still have a font size of 20). This is what I meant by not using .htmlText (sorry if I wasn't clear before).
2nd EDIT: I guess I should present the whole issue and maybe that'll clarify what I did wrong or couldn't achieve.
My intent is to have a Grid and add text into it. I do not want it to wrap or scroll so I add it to the next row in the Grid when the current row's children total width exceeds some number. In order to add it to the next row, I need to be able to calculate the width of the text. I would like to be able to style that text individually based on cases and there might be other components (like a TextInput). Essentially what I'm trying to accomplish is "Fill in the Blank".
I've included code to show what I'm currently doing and it works somewhat. It might be un-related to the original issue of styling but I can't figure out how to adjust the distance between each UITextField but aside from that this fits what I would like to accomplish. Relevant to the question is: I would like to change the way I style each UITextField (currently setting .htmlText) into something a bit straightforward though like I previously mentioned I'll gladly accept using .htmlText if that's the only solution.
So I have a Grid with x Rows in it and in each row, I have exactly one GridItem. Based on the input, I add UITextField and TextInput into the GridItem going on to the next GridItem when necessary. If you have a better way of doing so then that would be better but I guess what I really want is to find a different way of styling.
Also another problem, I'm not sure of the exact way to add a TextField into the display. I tried:
var t : TextField = new TextField();
t.text = "I'm a TextField";
hBox.addChild(t); // doesn't work
//this.addChild(t); // doesn't work either
But I get the following error:
TypeError: Error #1034: Type Coercion failed: cannot convert flash.text::TextField#172c8f9 to mx.core.IUIComponent.
Here's what I have that's working.
private function styleQuestionString(str : String) : String {
return '<FONT leading="1" face="verdana" size="20">' + str + '</FONT>';
}
private function loadQuestion(str : String) : void {
/* Split the string */
var tmp : Array = str.split("_");
/* Track the current width of the GridItem */
var curWidth : int = 0;
/* Display components that we will add */
var txtField : UITextField = null;
var txtInput : TextInput = null;
/* Track the current GridItem */
var curGridItem : GridItem = null;
/* Track the GridItem we can use */
var gridItemAC : ArrayCollection = new ArrayCollection();
var i : int = 0;
/* Grab the first GridItem from each GridRow of Grid */
var tmpChildArray : Array = questionGrid.getChildren();
for (i = 0; i < tmpChildArray.length; i++) {
gridItemAC.addItem((tmpChildArray[i] as GridRow).getChildAt(0));
}
curGridItem = gridItemAC[0];
gridItemAC.removeItemAt(0);
/* Used to set the tab index of the TextInput */
var txtInputCounter : int = 1;
var txtFieldFormat : UITextFormat = new UITextFormat(this.systemManager);
txtFieldFormat.leading = "1";
//var txtFieldFormat : TextFormat = new TextFormat();
//txtFieldFormat.size = 20;
/* Proper Order
txtField = new UITextField();
txtField.text = tmp[curItem];
txtField.autoSize = TextFieldAutoSize.LEFT;
txtField.setTextFormat(txtFieldFormat);
*/
var txtLineMetrics : TextLineMetrics = null;
var tmpArray : Array = null;
curGridItem.setStyle("leading", "1");
var displayObj : DisplayObject = null;
for (var curItem : int= 0; curItem < tmp.length; curItem++) {
/* Using UITextField because it can be auto-sized! */
/** CORRECT BLOCK (ver 1)
txtField = new UITextField();
txtField.text = tmp[curItem];
txtField.autoSize = TextFieldAutoSize.LEFT;
txtField.setTextFormat(txtFieldFormat);
***/
tmpArray = (tmp[curItem] as String).split(" ");
for (i = 0; i < tmpArray.length; i++) {
if (tmpArray[i] as String != "") {
txtField = new UITextField();
txtField.htmlText = styleQuestionString(tmpArray[i] as String);
//txtField.setTextFormat(txtFieldFormat); // No impact on output
txtLineMetrics = curGridItem.measureHTMLText(txtField.htmlText);
curWidth += txtLineMetrics.width + 2;
if (curWidth >= 670) {
curGridItem = gridItemAC[0];
curGridItem.setStyle("leading", "1");
if (gridItemAC.length != 1) {
gridItemAC.removeItemAt(0);
}
// TODO Configure the proper gap distance
curWidth = txtLineMetrics.width + 2;
}
displayObj = curGridItem.addChild(txtField);
}
}
//txtField.setColor(0xFF0000); // WORKS
if (curItem != tmp.length - 1) {
txtInput = new TextInput();
txtInput.tabIndex = txtInputCounter;
txtInput.setStyle("fontSize", 12);
txtInputCounter++;
txtInput.setStyle("textAlign", "center");
txtInput.width = TEXT_INPUT_WIDTH;
curWidth += TEXT_INPUT_WIDTH;
if (curWidth >= 670) {
curGridItem = gridItemAC[0];
if (gridItemAC.length != 1) {
gridItemAC.removeItemAt(0);
}
// TODO Decide if we need to add a buffer
curWidth = TEXT_INPUT_WIDTH + 2;
}
curGridItem.addChild(txtInput);
txtInputAC.addItem(txtInput);
/* Adds event listener so that we can perform dragging into the TextInput */
txtInput.addEventListener(DragEvent.DRAG_ENTER, dragEnterHandler);
txtInput.addEventListener(DragEvent.DRAG_DROP, dragDropHandler);
txtInput.addEventListener(DragEvent.DRAG_EXIT, dragExitHandler);
}
/* Add event so that this label can be dragged */
//txtField.addEventListener(MouseEvent.MOUSE_MOVE, dragThisLabel(event, txtField.text));
}
}
After about 8 hours of searching for a solution to what would seem to be such a simple issue I FINALLY stumbled on your posts here... Thankyou!!!
I have been stumbling around trying to get TextField to work and had no Joy, Label was fine, but limited formatting, and I need to be able to use embedded fonts and rotate. After reading the above this finally worked for me:
var myFormat:TextFormat = new TextFormat();
myFormat.align = "center";
myFormat.font = "myFont";
myFormat.size = 14;
myFormat.color = 0xFFFFFF;
var newTxt:UITextField = new UITextField();
newTxt.text = "HELLO";
addChild(newTxt);
newTxt.validateNow();
newTxt.setTextFormat(myFormat);
The order of addChild before the final 2 steps was critical! (myFont is an embedded font I am using).
One again... a thousand thankyou's...
John
EDIT BASED ON THE ASKERS FEEDBACK:
I didn't realize you wanted to just apply one style to the whole textfield, I thought you wanted to style individual parts. This is even simpler for you, won't give you any trouble at all :)
var textFormat: TextFormat = new TextFormat("Arial", 12, 0xFF0000);
myText.setTextFormat(textFormat);
Be aware that this sets the style to the text that is in the TextField, not necessarily future text you put in. So have your text in the field before you call setTextFormat, and set it again every time you change it just to be sure it stays.
It's probably best if you use a normal TextField as opposed to the component. If you still want the component you may need to call textArea.validateNow() to get it to update with the new style (not 100% sure on that one though) Adobe components are notoriously bad, and should be avoided. :(
To see all available options on the TextFormat object see here
END EDIT ---------
This is easy enough to just do with CSS in a normal old TextField.
var myCSS: String = "Have some CSS here, probably from a loaded file";
var myHTML: String = "Have your HTML text here, and have it use the CSS styles";
// assuming your textfield's name is myText
var styleSheet: StyleSheet = new StyleSheet();
styleSheet.parseCSS(myCSS);
myText.autoSize = TextFieldAutoSize.LEFT;
myText.styleSheet = styleSheet;
myText.htmlText = myHTML;
Supported HTML tags can be found here
Supported CSS can be found here
The reason you have a problem adding Textfield to containers is that it doesn't implement the IUIComponent interface. You need to use UITextField if you want to add it. However, that's presenting me with my own styling issues that brought me to this question.
A few things I know:
TextField is styled using the TextFormat definition, and applying it to the textfield. As Bryan said, order matters.
setStyle does nothing on IUITextField, and the TextFormat method doesn't seem to work the same as in normal TextFields. (Edit #2: Ahah. You need to override the "validateNow" function on UITextFields to use the setTextFormat function)
To autosize a TextArea, you need to do something like this (inheriting from TextArea):
import mx.core.mx_internal;
use namespace mx_internal;
...
super.mx_internal::getTextField().autoSize = TextFieldAutoSize.LEFT;
this.height = super.mx_internal::getTextField().height;
Found this code on, I think, on StackOverflow a while back. Apologies to the original author. But the idea is that you need to access the "mx_internal" raw textfield.
Text and TextArea have wrapping options. (Label does not). So if you set the explicit width of a Text object, you might be able to size using the measuredHeight option and avoid truncation.
(edit: That was #4, but stackoverflow parsed it into a 1...)