How would you flip an ImageView along its vertical axis?
Hello,
How would you flip an ImageView along its vertical axis? This would help me reduce the number of image files I would require in my project.
thanks
jose
Rotation about x_axis should works (javafx 2.2):
Translate flipTranslation = new Translate(0,imageView.getImage().getHeight());
Rotate flipRotation = new Rotate(180,Rotate.X_AXIS);
imageView.getTransforms().addAll(flipTranslation,flipRotation);Regards.
Edited by: 918075 on 2013-02-01 07:44
Edited by: 918075 on 2013-02-01 07:47
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How would you configure your database?
How would you configure your disks with those specifications?
General Database Characteristics:
os is Oracle Enterprise Linux 64 bit
Enterprise Edition
180GIG size database.
High "oltp" environment.
Estimated growth of 40 to 60GIG/year
20GIG of archivelogs/Day
Flashback time is 24 hours:120GIG of flashback space in avg
Local backup. Full database copy, then incremental is the preferred method.
That way, if a datafile goes bezerk, replace with backup datafile then recover.
Or if only a few corrupt block, block recover with rman.
BTW: Backup is done locally first, then send to another server, than on tape.
Archivelogs is duplexed on another server.
General Hardware Info:
Server Platform: Dell PowerEdge 1950
16 GIG RAM
2 * 64 bit CPU's
2 * local 300G/15rpm disks
Storage: Dell PowerVault MD3000
15 * 300G/15rpm Disks
Possibility for 17 disks here.
Here is my configuration so far:
OS+ oracle binary + Online Redo Logs Copy 1 + Control File Copy 1: 2 disks raid 1
flashback + backup + Online Redo Logs Copy 2 + Control File Copy 2: 4 disks raid 1 or 10
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UNDO Datafiles: 2 disks raid 1
Datafiles 6 disk raid10
total 17 disks: + spare disks on the side of one ever fails
1) How would you configure it with those specs?
2) Is there missing info to make a particular decision?Here is my reply concerning data separate from index files:
See http://www.dizwell.com/prod/node/751 for the complete article.
"Why wouldn't you keep indexes separate from their tables?! Because doing so makes no difference to performance... and I patiently explained that a table and its index are never accessed simultaneously by a single user so that contention between them cannot arise. And yes, in a multi-user system, of course the two could be accessed simultaneously -but so could two tables, or two indexes. " -
How would you find the pitch period of a sound signal?
Hi
I have a few questions and i would like if somebody could help me even with the smallest comment on this.
How would someone be successfully estimate the pitch period (fundamental frequency) of a 5 second sound file?How would you successfully distinguish the voiced from the unvoiced parts and how would you make sure you dont mix voiced/unvoiced sections? Finally how can you find the exact points where the pitch is at its peak throughout the signal?
Any help/comment/suggesion would be much appreciatedHello Madgreek,
After some thought I think I may have come up with an algorithm for what we have discussed. Basically, you are interested in knowing the time intervals over which you can observe any given frequency in your signal. As you had suggested, you can examine small windows of your signal and perform FFTs on each of the small windows to determine what frequency content is contained in that window. By examining all of the windows, you will see when particular frequencies are prevalent in the original signal. You'd want to use the smallest allowable window to give you the most resolution, but one that is large enough to cover an entire period of the lowest frequency (so that you don't miss this frequency).
I have attached an example program that performs this operation. The example performs this analysis on an array that represents audio data. I am basically performing multiple FFTs (for each window) and stacking these FFTs in time to form a 3D plot. By examining the 3D plot, I can then see when in time my frequencies of interest are at their peaks. Rather than graphing these plots, you may work out a different algorithm for programmatically determining and logging these peaks and times. I hope this is what you were looking for!
Attachments:
Time Variable FFT.vi 250 KB -
Im wondering how would you do a scrolling page over a static background?
I watched this and its great https://www.youtube.com/watch?v=qRC5-GKYa_Q but im wondering how would you do this over a static background?
Hi Paul,
This is done using Parallax Scrolling. Static back ground should not be a problem in achieving this. Please try it and let us know if you face any issue.
Regards,
Aish -
How would you change the state to the base state?
How would you change the state to the base state? Its not
letting me do something like:
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What I have done now in my code is this:
viewstack1.addChildAt(loginCanvas,0);
toggle.selectedIndex = 0;
However nothing happens at this line of code:
toggle.selectedIndex = 0;
but this works:
toggle.selectedIndex = 1; or ...
toggle.selectedIndex = 2;
toggle.selectedIndex = 3;
toggle.selectedIndex = 4;
toggle.selectedIndex = 5;
toggle.selectedIndex = 6;
The strange thing is that if I have a button on the screen:
<mx:Button x="10" y="3" label="Button"
click="toggle.selectedIndex =0"/>
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The question narrows down to : Which is the best solution to trigger each 0,5 seconds an event (on the JavaFX thread) ?
I could do this with a TimelineAnimation or with a Task<Void>, the problem withthe Task is that I have to update the UI with Platform.runLater() each time which is an impact on the overall perfomance. On the otherhand the TimerLineAnimation is useful to update a property and I do not think that it is the approriate method to realize a blink effect.
How would you do this ?
E.G. I have a circle. This shape is supposed to change its Color every 0,5 seconds (And there can be many of this circles..)I would use some kind of Transition, not because of any performance consideration but merely because it will keep your code cleaner. Used properly, a Task with Platform.runLater(...) to update the UI will be as efficient as anything else, but it can be a bit tricky to get it right (and using Transitions, you delegate the job of getting the code right to the JavaFX team, who are probably better at this kind of thing than either you or I).
The Timeline will actually animate the transition between property values. Almost anything you want to do can be expressed as a change in property; your example of changing the color of a Circle simply involves changing the value of the fillProperty. So using a Timeline will fade one color into another.
If you want a "traditional" blink, you could two PauseTransitions with the onFinished event set to change the color.
This compares the two approaches:
import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.PauseTransition;
import javafx.animation.SequentialTransition;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class BlinkingCircles extends Application {
@Override
public void start(Stage primaryStage) {
final HBox root = new HBox();
final Group faders = new Group();
final Color blue = new Color(0, 0, 1.0, 0.3);
final Color red = new Color(1.0, 0, 0, 0.3);
final ObjectProperty<Paint> colorFader = new SimpleObjectProperty<Paint>(blue);
for (int i=0; i<20; i++) {
faders.getChildren().add(createCircle(colorFader));
KeyValue blueKV = new KeyValue(colorFader, blue);
KeyValue redKV = new KeyValue(colorFader, red);
KeyFrame blueKF = new KeyFrame(new Duration(1000), blueKV);
KeyFrame redKF = new KeyFrame(new Duration(500), redKV);
Timeline fadeTimeline = new Timeline(redKF, blueKF);
fadeTimeline.setCycleCount(Animation.INDEFINITE);
fadeTimeline.play();
final Group blinkers = new Group();
final ObjectProperty<Paint> colorBlinker = new SimpleObjectProperty<Paint>(blue);
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blinkers.getChildren().add(createCircle(colorBlinker));
PauseTransition changeToRed = createPauseTransition(colorBlinker, red);
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blinkTransition.setCycleCount(Animation.INDEFINITE);
blinkTransition.play();
root.getChildren().addAll(faders, blinkers);
Scene scene = new Scene(root, 640, 400);
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Circle c = new Circle(Math.random()*300, Math.random()*300, 20);
c.fillProperty().bind(color);
c.setStroke(Color.BLACK);
return c ;
private PauseTransition createPauseTransition(final ObjectProperty<Paint> colorBlinker, final Color color) {
PauseTransition changeColor = new PauseTransition(new Duration(500));
changeColor.setOnFinished(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent evt) {
colorBlinker.set(color);
return changeColor ;
public static void main(String[] args) {
launch(args);
} -
How would you model a trip or trajectory with Spatial ?
Hello,
I have a design question that is probably simple : "how would you model a trip/trajectory with Spatial".
I would like to query trips that were in a specific area between 2 dates.
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A simple way to model a trajectory is to model it as a set of trajectory points with a timestamp.
Each trajectory has a trajectory id as its PK.
Table Trajectory:
Trajectory_ID NUMBER,
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A complete trajectory is to query a trajectory order by the time of its trajectory points.
If you are only interested in the full trajectory geometry and time,the following might be sufficient.
Trajectory_ID NUMBER,
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jack -
How would you detect a ground like this:
I have made racing games in the past, but never a side scrolling type.
Im trying to make one similar to this: http://www.gamesfreak.net/games/Cyclo-Maniacs_3730.html
But how would you keep the player on the ground? well not stuck to the ground because we would want the player to be able to use things like ramps.
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Here is what i have so far:
package
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.KeyboardEvent;
import flash.geom.Point;
public class DocumentMain extends MovieClip
public var _startMarker:StartMarker = new StartMarker;
public var _Player:Player;
public var _Boundaries:Boundaries;
public var _Wall:Wall;
public var _Floor:Floor;
public var _LButton:LButton = new LButton;
public var _RButton:RButton = new RButton;
public var _UButton:UButton = new UButton;
public var _DButton:DButton = new DButton;
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private var _vx:Number;
public function DocumentMain()
stage.focus = stage;
//stage.addChild(_startMarker);
//_startMarker.x = 300;
//_startMarker.y = 300;
stage.addChild(_LButton);
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_LButton.width = 75;
_LButton.addEventListener(MouseEvent.MOUSE_DOWN, LMouseDown);
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stage.addChild(_RButton);
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_RButton.y = 600;
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_RButton.width = 75;
_RButton.addEventListener(MouseEvent.MOUSE_DOWN, RMouseDown);
_RButton.addEventListener(MouseEvent.MOUSE_UP, RMouseUp);
stage.addChild(_DButton);
_DButton.x = 140;
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_DButton.height = 75;
_DButton.width = 75;
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//_DButton.addEventListener(MouseEvent.MOUSE_UP, DMouseUp);
stage.addChild(_UButton);
_UButton.x = 140;
_UButton.y = 550;
_UButton.height = 75;
_UButton.width = 75;
_UButton.addEventListener(MouseEvent.MOUSE_DOWN, UpMouseDown);
_UButton.addEventListener(MouseEvent.MOUSE_UP, UpMouseUp);
_startMarker.visible = true;
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_startMarker.y = 300;
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_vy = 0;
_Player.addEventListener(MouseEvent.MOUSE_DOWN, JumpDownHandler);
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this.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
private function JumpDownHandler(MouseEvent):void
_vy = -20;
private function JumpUpHandler(MouseEvent):void
_vy = 0;
private function LMouseDown(MouseEvent):void
_vx = -20;
private function LMouseUp(MouseEvent):void
trace("LMouseUp");
_vx = 0;
private function RMouseUp(MouseEvent):void
_vx = 0;
private function RMouseDown(MouseEvent):void
trace("RMouseDown");
_vx = 20;
private function UpMouseDown(MouseEvent):void
_vy = -20;
private function UpMouseUp(MouseEvent):void
trace("UMouseUp");
//_vx = 0;
private function enterFrameHandler(e:Event):void
_vy += 2;
//_vx += 20;
_Player.x += + _vx;
_Player.y += + _vy;
processAllTheCollisions();
scrollTheStage();
private function processAllTheCollisions():void
if (_vy > 0)
if (_Player.y > 500)
_Player.x = _startMarker.x;
_Player.y = _startMarker.y;
_Boundaries.x = 0;
_Boundaries.y = 0;
_vy = 0;
else
var collision:Boolean = false;
if (_Boundaries.hitTestPoint(_Player.x,_Player.y,true))
collision = true;
if (collision)
while (collision)
_Player.y -= 0.1;
collision = false;
if (_Boundaries.hitTestPoint(_Player.x, _Player.y, true))
collision = true;
_vy = 0;
private function scrollTheStage():void
_Boundaries.x += (stage.stageWidth * 0.5) - _Player.x;
_Player.x = stage.stageWidth * 0.5;
//_Boundaries.y += (stage.stage.stageHeight * 0.5) - _Player.y;
//_Player.y = stage.stageHeight * 0.5;
private function keyDownHandler(e:KeyboardEvent):void
switch (e.keyCode)
case 37 :
_vx = -20;
break;
case 38 :
_vy = -20;
break;
case 39:
_vx = 20;
break;
default:
private function keyUpHandler(e:KeyboardEvent):void
switch (e.keyCode)
case 37 :
case 39 :
_vx = 0;
break;
default: -
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If you want to delete the password that has been saved do the following:
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The XM08 function group has the following type declarations:
TYPES: BEGIN OF mmcr_drseg_co.
INCLUDE STRUCTURE cobl_mrm_d.
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unpl_refwr TYPE refwr,
END OF mmcr_drseg_co.
TYPES: mmcr_tdrseg TYPE mmcr_drseg OCCURS 0,
TYPES: BEGIN OF mmcr_drseg.
INCLUDE STRUCTURE drseg.
TYPES: cr LIKE drseg_cr OCCURS 0,
co TYPE mmcr_drseg_co OCCURS 0,
sm LIKE drseg_sm OCCURS 0,
charact TYPE rbcharact_instance OCCURS 3,
"instances of characteristics
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uebrblgp TYPE rblgp,
selkz_db TYPE selkz,
rblgp_old TYPE rblgp, "rblgp before aggregation
END OF mmcr_drseg.
How would YOU redeclare these types so that they work in an ABAP Objects class?
Some of the "fixes" are easy, like replacing "LIKE" with "TYPE:".
But what about the "INCLUDE STRUCTURE" and the "occurs 0" specifications?
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I wonder it can be directly in ABAP (I would like to hear opinions from others as well!), I needed to use Data Dictionary as well:
TYPES: BEGIN OF mmcr_drseg_co.
INCLUDE STRUCTURE cobl_mrm_d.
TYPES: cr TYPE z_tt_drseg_cr,
unpl_refwr TYPE refwr,
END OF mmcr_drseg_co.
z_tt_drseg_cr is a table type created in SE11, based on structure drseg_cr.
the way to create internal table and work area, based on the above:
DATA : gt_... TYPE TABLE OF mmcr_drseg_co.
DATA : gw_... TYPE mmcr_drseg_co.
hope this helps some
ec
UPDATE : Rich is right, it is possible to do it only in ABAP with the DEFAULT KEY addition. -
Disable the pop-up message box "How would you like to open this file" to open pdf file??
Hi,
is there any way i can stop the pop-up box displaying to open pdf file in sharepoint document library? Right now whenever i am trying to open pdf file, asking "how would you like to open" Read only or edit mode. currently MIME Type is setup
but still pop-up message box.
Thanks in advanced!Hi ,
As far as I know, This is a default feature. and is not recommended to delete or deactivate this pop up.
This is a feature of office and there is a dll called owssupp.dll which is responsible for getting the popup to open.
You can go to IE tools> addon settings and deactivate the above dll (sharepoint open document class). But if you do so, then the other office office files which are word/excel/pptx etc.. would aslo gets affected and they also wont get the popup.
Hope this helps.
Best Regards, Ashok Yadala -
How would you write a "wildcard" in a filefilter?
How would you go about to have a wildcard instead of the "*" in the following filefilter;
File[] files = new File("./resultat/resultat_" + "*" + "_" + index[0]).listFiles (new FileFilter () {
public boolean accept (File file) {
return ! file.isDirectory ();
});All help appriciated
- Karl XIIShouldn't "a*" accept all files that begins with "a" and ends with whatever?No. "*" in regexp is a not a wildcard match. Instead it matches one or more instances of the preceeding
value.
Therefore "a*" will match "a", "aa", "aaa", "aaaa" etc but will not match anything which does not end in
an "a".
The following might help you out. (not the most elegent expression but it will do
import java.util.regex.*;
public class RegExp{
public static void main(String[] args) {
Pattern p = Pattern.compile("a*b");
Matcher m = p.matcher("aaaab");
System.out.println(m.matches());
// interesting bit here
// match one or more occurances of any characters in the ASCII charset (the \\p{ASCII}* bit
p = Pattern.compile("hello_\\p{ASCII}*_b");
m = p.matcher("hello_wibble_b");
System.out.println(m.matches());
} -
How would you pass more than 255 args?
I have an SFTP program that currently is only passed a single file. I am modifying it so that it will loop though an array of files to simulate an mput command. Originally I was just going to call the program with each file to be transferred as an argument but noticed the 255 argument limit. I am looking at potentially having 1500 - 2000 files to transfer at one time. I am just looking for advice on how this should be designed. One idea that was forwarded to me was to just create a listing of the files on the server and use that list file as my argument. Would this be the best approach for this issue?
sdhalepaska wrote:
georgemc wrote:
sdhalepaska wrote:
georgemc wrote:
sdhalepaska wrote:
georgemc wrote:
I see no reason why you need an argument for every file.I would not necessarily need one for every file. Prior to our needing to use this for multiple files, it was easy enough to pass in one file as an argument. That is my question, how would you try to pass in a long list of files?Let's establish what you are concerned about. The 255 argument limit is on method signatures. From what you're saying here, you're talking about arguments being passed into your application from, say, the shell. Am I right?Correct, please see my clarified post. From what I have tested, the 255 argument limit appears to exist even for arguments passed to main.Ah, but arguments passed to main from the command line are passed into main as a single array of Strings, no matter how many of them there are. I have no idea what the limit on those is, but an array can hold millions of elements. I expect your shell will moan about that many, though.
As I see it, you have a few choices. Unless these files are all in different, arbitrary directories, you can specify a list of directories for your app to search. Or you can pass them all in one at a time, and see how you go. Or you can list them in a text file, pass that to your app and have it work them out. Or write a script that invokes your app multiple times. What you don't need, is a method that takes each file as an argument.Thank you for walking me through this. Would you mind telling me which way you would lean if you were designing this? The files will all be in a single directory on the server and I would not like to invoke the app multiple times as it creates a connection during each invocation. They're all in the single directory. Ok, are all the files in that directory to be transferred? If so, I'd just pass the directory name to the app, and have it iterate over all the files. If it's only to be certain ones, how do you know which ones? Is there some regex or filtering you can do on the command line?
If you are interested, the 255 argument limit for main that I tested was from this article:
[http://www.javaspecialists.eu/archive/Issue059.html|http://www.javaspecialists.eu/archive/Issue059.html]
It does die at 255 using Java 1.5.Like I said, arguments to a method are thus limited. But the args passed to an app are passed to main as one argument - an array. In short, that article is not relevant to your problem.
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