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  • Free Java Workshops at Mobile World Congress

    - by Jacob Lehrbaum
    Are you attending Mobile World Congress in Barcelona next week? If so, you might want to register for Oracle's free workshop series taking place in the App Planet. We will be hosting a series of 25 workshops in our booth covering a range of topics that include: Benefits of Deploying Phones with Oracle Java Wireless Client Oracle's Embedded Java solutions for Machine-to-Machine applications Building better User Interfaces with the Lightweight User Interface Toolkit Resources to help you leverage Operator Network APIs in your Applications The Java Verified Program: new trusted status and other recent initiatives Building better mobile enterprise applications with Oracle's ADF Mobile technology How to build a profitable mobile applications business with Java ME Guest speakers from Orange, Telefonica and from leading ISVs REGISTER NOW for one or more workshops in the Oracle Java Booth 7C18 located in the App Planet. Oh, and did we mention there might be giveaways? Note: you may need to "sign out" if you have an account on Oracle.com in order to see the registration page

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  • Day 2 of Oracle OpenWorld 2012 October 1st

    - by Maria Colgan
    Oracle OpenWorld started yesterday and San Francisco is just buzzing with Oracle folks! If you are attending the conference don't miss the opportunity to chat with the Optimizer development team at one of our technical sessions or at the Oracle Demo grounds. Our first technical session(Session CON8455) happens tomorrow at 1:15pm but the Oracle Optimizer Demo booth opens today. We are located in the database demo grounds, in Moscone South, booth number 3157. Members of the Optimizer team will be available from 9:45am to 6pm today, to answer any Optimizer questions you might have and of course to dole out our limited edition Optimizer bumper stickers! The must have souvenir from this years conference +Maria Colgan

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  • Adapters, SOA Suite and More @Openworld 2012

    - by Ramkumar Menon
    You are invited to attend my sessions at Oracle Openworld 2012 at San Francisco! CON8627 - Administration and Management Essentials for Oracle SOA Suite 11g Session Speakers: Ramkumar Menon, Francis Ip Session Schedule: Monday, Oct 1, 1:45 PM - 2:45 PM - Session Location: Marriott Marquis - Salon 7 CON8642 - Cloud and On-Premises Applications Integration using Oracle Integration Adapters Session Speakers: Vikas Anand, Ramkumar Menon, Stephen Mcritchie Session Schedule: Wednesday, Oct 3, 1:15 PM - 2:15 PM Session Location: Moscone South - 310 And do stop by at the Oracle Integration Adapters Demo booth. Watch some live demos on how you can use our suite of Adapters to integrate and extend your Enterprise Applications! This is your opportunity to meet with our Engineering team, share with us your Integration use-cases and challenges, and hear from us on our Roadmap. The Oracle Integration Adapters booth is located at the Fusion Middleware Demopod area  from Monday, October 1 through Wednesday, October 3, 2012.

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  • OPN Specialized Partner Activities at Collaborate 2012

    - by Get_Specialized!
    If your a Partner planning to attend the Collaborate 2012 event, April 22-26th in Las Vegas, Oracle Partner Network (OPN) team members attending welcome meeting you onsite. Whether you are interested in being a new Partner, or you are a long standing Partner seeking an update on OPN programs or Partner Specialization, we welcome meeting with you 1 on 1. In fact, we might drop by your booth or session to further recognize you for your OPN Specialization accomplishments! If you are also  participating in Social Media while at the event, let us know that as well. In addition, we are also seeking to meet Partners, while at Collaborate 2012, who may be interested in speaking at Oracle OpenWorld on their OPN Specialization program accomplishments and customer successes. Understanding that Partners can be busy staffing their own booths, we welcome meeting you when the exhibit hall is closed. Or if you want a break away from your booth, we are glad to meet  on the exhibit hall floor Oracle Validated Integration Lounge - OAUG & Quest member Booth 1679. To learn more or to schedule a meeting on site Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} contact us

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  • Oracle Integration Adapters at Oracle Openworld 2012!

    - by Ramkumar Menon
    Oracle Open world 2012 is just a weekend away and we are looking forward to showcase Oracle Integration Adapters at our Demo booth at  the Moscone Center.  Come visit us! Watch some live demos on how you can use our suite of Adapters to integrate and extend your Enterprise Applications! This is your opportunity to meet with our Engineering team, share with us your Integration use-cases and challenges, and hear from us on our Roadmap. The Oracle Integration Adapters booth is located at the Fusion Middleware Demopod area  from Monday, October 1 through Wednesday, October 3, 2012. See you next week!

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  • Optimizer Bumper Sticker Competition

    - by Maria Colgan
    For the last couple of months we have been running a competition on twitter (@SQLMaria) looking for the best Optimizer bumper sticker, which we will give away at the Optimizer demo booth at this years Oracle Open World. We got tons of excellent entries and had a tough time narrowing it down to just 5 but we have. So now we need your help to pick the final winner. Click here to vote for your favorite. Then stop by the Optimizer demo booth at Oracle Open World to claim your bumper sticker!

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  • Speaking at the VS 2010 Launch at TechEd India this week

    Ill be speaking at TechEd India and the Visual Studio 2010 Launch in Bangalore, India this week. Ill be doing three sessions: Tuesday 2:30- Building RESTful Applications with the Open Data Protocol Wednesday 12:30-Building Applications with Silverlight 4.0 and WCF RIA Services Wednesday 2:30-Exploring the Silverlight 4.0 Business Features In addition, Team Telerik will be staffing a booth with Tee-shirts (hopefully if they get out of customs on time!) and live demos of our products and our brand new product to be announced today! See you at my sessions or at the booth! Technorati Tags: Telerik,TechEd Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • LinuxCon North America 2014

    - by Chris Kawalek
    As the first day of LinuxCon North America 2014 draws to a close, we want to thank all the folks that stopped by our booth today! If you're at the show, please stop by our booth #204 and have a chat with our experts. And you won't want to miss these Linux and virtualization related sessions coming up tomorrow and Friday: Thursday Aug 21 - Static Analysis in the Linux Kernel Using Smatch - Dan Carpenter, Oracle Friday Aug 22 - The Proper Care of Feeding of MySQL Database for Linux Admins Who Also Have DBA duties - Morgan Tocker, Oracle Friday Aug 22 - Why Use Xen for Large Scale Enterprise Deployments, Konrad Rzeszutek Wilk , Oracle We look forward to meeting with you and we hope you enjoy the rest of LinuxCon North America 2014! 

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  • Devoxx Coming Up!

    - by Yolande
     Devoxx, the biggest Java conference in Europe, is  only a couple of days away. From November 12th to  16th, over 3,400 developers from all over Europe  are descending on Antwerp, Belgium for a week  focused on Java.  At the Oracle booth, Java experts will be available  to answer your  questions and demo the new  features of the Java Platform, including Java  Embedded,  JavaFX, JavaSE and Java EE.  Beer bash at the booth Tuesday from 17:30-19:30 and Wednesday/Thursday from 18:00 to 20:00. Oracle is also raffling off two Raspberry PI and books every day. Make sure to stop by  and enter the raffle during the day. Check the online schedule with sessions from the Java experts at Oracle.

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  • TechEd 2010: First Time In New Orleans

    Weve teamed up with Habitat For Humanity to build a new home for a deserving family in New Orleans. The wall raising ceremony for the home will be this Friday, June 11th. If youre at TechEd and would like to help then come by the DevExpress booth on Aisle 2600 at Booth 13 and let us know. Check out these pictures of beautiful New Orleans, the city that is hosting Microsoft TechEd 2010. This is my first time visiting this historic city and its been fantastic. The pictures below represent just...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Oracle Open World 2012

    - by Eric S
    I'll be at Oracle Open World 2012 next week in San Francisco. I'm presenting in a session entitled "What’s New with Oracle VM Server for x86 and SPARC Architectures: A Technical Deep Dive", along with Adam Hawley. We'll be talking about Oracle's overall virtualization strategy, what's new with Oracle server virtualization on both x86 and SPARC, as well as an update on Oracle's virtualization management capabilities. The session runs from 11:45am to 12:45pm on Wednesday 10/3, in Moscone South - room 252. You can also find me at the Oracle VM Server for SPARC booth on Monday morning and Tuesday afternoon to showcase some pretty cool upcoming features for SPARC virtualization. And if you're there early, you might catch me at the Software Deployment with Oracle VM Templates booth on Sunday afternoon. It promises to be jam-packed and informative week!

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  • So Much Happening at Devoxx

    - by Tori Wieldt
    Devoxx, the premier Java conference in Europe, has been sold out for a while. The organizers (thanks Stephan and crew!) cap the attendance to make sure all attendees have a great experience, and that speaks volumes about their priorities. The speakers, hackathons, labs, and networking are all first class. The Oracle Technology Network will be there, and if you were smart/lucky enough to get a ticket, come find us and join the fun: IoT Hack Fest Build fun and creative Internet of Things (IoT) applications with Java Embedded, Raspberry Pi and Leap Motion on the University Days (Monday and Tuesday). Learn from top experts Yara & Vinicius Senger and Geert Bevin at two Raspberry Pi & Leap Motion hands-on labs and hacking sessions. Bring your computer. Training and equipment will be provided. Devoxx will also host an Internet of Things shop in the exhibition floor where attendees can purchase Arduino, Raspberry PI and Robot starter kits. Bring your IoT wish list! Video Interviews Yolande Poirier and I will be interviewing members of the Java Community in the back of the Expo hall on Wednesday and Thursday. Videos are posted on Parleys and YouTube/Java. We have a few slots left, so contact me (you can DM @Java) if you want to share your insights or cool new tip or trick with the rest of the developer community. (No commercials, no fluff. Keep it techie and keep it real.)  Oracle Keynote Wednesday morning Mark Reinhold, Chief Java Platform Architect, and Brian Goetz, Java Language Architect will provide an update on Java 8 and beyond. Oracle Booth Drop by the Oracle booth to see old and new friends.  We'll have Java in Action demos and the experts to explain them and answer your questions. We are raffling off Raspberry Pi's each day, so be sure to get your badged scanned. We'll have beer in the booth each evening. Look for @Java in her lab coat.  See you at Devoxx! 

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  • Problems with SAT Collision Detection

    - by DJ AzKai
    I'm doing a project in one of my modules for college in C++ with SFML and I was hoping someone may be able to help me. I'm using a vector of squares and triangles and I am using the SAT collision detection method to see if objects collide and to make the objects respond to the collision appropriately using the MTV(minimum translation vector) Below is my code: //from the main method int main(){ // Create the main window sf::RenderWindow App(sf::VideoMode(800, 600, 32), "SFML OpenGL"); // Create a clock for measuring time elapsed sf::Clock Clock; srand(time(0)); //prepare OpenGL surface for HSR glClearDepth(1.f); glClearColor(0.3f, 0.3f, 0.3f, 0.f); //background colour glEnable(GL_DEPTH_TEST); glDepthMask(GL_TRUE); //// Setup a perspective projection & Camera position glMatrixMode(GL_PROJECTION); glLoadIdentity(); //set up a 3D Perspective View volume //gluPerspective(90.f, 1.f, 1.f, 300.0f);//fov, aspect, zNear, zFar //set up a orthographic projection same size as window //this mease the vertex coordinates are in pixel space glOrtho(0,800,0,600,0,1); // use pixel coordinates // Finally, display rendered frame on screen vector<BouncingThing*> triangles; for(int i = 0; i < 10; i++) { //instantiate each triangle; triangles.push_back(new BouncingTriangle(Vector2f(rand() % 700, rand() % 500), 3)); } vector<BouncingThing*> boxes; for(int i = 0; i < 10; i++) { //instantiate each box; boxes.push_back(new BouncingBox(Vector2f(rand() % 700, rand() % 500), 4)); } CollisionDetection * b = new CollisionDetection(); // Start game loop while (App.isOpen()) { // Process events sf::Event Event; while (App.pollEvent(Event)) { // Close window : exit if (Event.type == sf::Event::Closed) App.close(); // Escape key : exit if ((Event.type == sf::Event::KeyPressed) && (Event.key.code == sf::Keyboard::Escape)) App.close(); } //Prepare for drawing // Clear color and depth buffer glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Apply some transformations glMatrixMode(GL_MODELVIEW); glLoadIdentity(); for(int i = 0; i < 10; i++) { triangles[i]->draw(); boxes[i]->draw(); triangles[i]->update(Vector2f(800,600)); boxes[i]->draw(); boxes[i]->update(Vector2f(800,600)); } for(int j = 0; j < 10; j++) { for(int i = 0; i < 10; i++) { triangles[j]->setCollision(b->CheckCollision(*(triangles[j]),*(boxes[i]))); } } for(int j = 0; j < 10; j++) { for(int i = 0; i < 10; i++) { boxes[j]->setCollision(b->CheckCollision(*(boxes[j]),*(triangles[i]))); } } for(int i = 0; i < triangles.size(); i++) { for(int j = i + 1; j < triangles.size(); j ++) { triangles[j]->setCollision(b->CheckCollision(*(triangles[j]),*(triangles[i]))); } } for(int i = 0; i < triangles.size(); i++) { for(int j = i + 1; j < triangles.size(); j ++) { boxes[j]->setCollision(b->CheckCollision(*(boxes[j]),*(boxes[i]))); } } App.display(); } return EXIT_SUCCESS; } (ignore this line) //from the BouncingThing.cpp BouncingThing::BouncingThing(Vector2f position, int noSides) : pos(position), pi(3.14), radius(3.14), nSides(noSides) { collided = false; if(nSides ==3) { Vector2f vert1 = Vector2f(-12.0f,-12.0f); Vector2f vert2 = Vector2f(0.0f, 12.0f); Vector2f vert3 = Vector2f(12.0f,-12.0f); verts.push_back(vert1); verts.push_back(vert2); verts.push_back(vert3); } else if(nSides == 4) { Vector2f vert1 = Vector2f(-12.0f,12.0f); Vector2f vert2 = Vector2f(12.0f, 12.0f); Vector2f vert3 = Vector2f(12.0f,-12.0f); Vector2f vert4 = Vector2f(-12.0f, -12.0f); verts.push_back(vert1); verts.push_back(vert2); verts.push_back(vert3); verts.push_back(vert4); } velocity.x = ((rand() % 5 + 1) / 3) + 1; velocity.y = ((rand() % 5 + 1) / 3 ) +1; } void BouncingThing::update(Vector2f screenSize) { Transform t; t.rotate(0); for(int i=0;i< verts.size(); i++) { verts[i]=t.transformPoint(verts[i]); } if(pos.x >= screenSize.x || pos.x <= 0) { velocity.x *= -1; } if(pos.y >= screenSize.y || pos.y <= 0) { velocity.y *= -1; } if(collided) { //velocity.x *= -1; //velocity.y *= -1; collided = false; } pos += velocity; } void BouncingThing::setCollision(bool x){ collided = x; } void BouncingThing::draw() { glBegin(GL_POLYGON); glColor3f(0,1,0); for(int i = 0; i < verts.size(); i++) { glVertex2f(pos.x + verts[i].x,pos.y + verts[i].y); } glEnd(); } vector<Vector2f> BouncingThing::getNormals() { vector<Vector2f> normalVerts; if(nSides == 3) { Vector2f ab = Vector2f((verts[1].x + pos.x) - (verts[0].x + pos.x), (verts[1].y + pos.y) - (verts[0].y + pos.y)); ab = flip(ab); ab.x *= -1; normalVerts.push_back(ab); Vector2f bc = Vector2f((verts[2].x + pos.x) - (verts[1].x + pos.x), (verts[2].y + pos.y) - (verts[1].y + pos.y)); bc = flip(bc); bc.x *= -1; normalVerts.push_back(bc); Vector2f ac = Vector2f((verts[2].x + pos.x) - (verts[0].x + pos.x), (verts[2].y + pos.y) - (verts[0].y + pos.y)); ac = flip(ac); ac.x *= -1; normalVerts.push_back(ac); return normalVerts; } if(nSides ==4) { Vector2f ab = Vector2f((verts[1].x + pos.x) - (verts[0].x + pos.x), (verts[1].y + pos.y) - (verts[0].y + pos.y)); ab = flip(ab); ab.x *= -1; normalVerts.push_back(ab); Vector2f bc = Vector2f((verts[2].x + pos.x) - (verts[1].x + pos.x), (verts[2].y + pos.y) - (verts[1].y + pos.y)); bc = flip(bc); bc.x *= -1; normalVerts.push_back(bc); return normalVerts; } } Vector2f BouncingThing::flip(Vector2f v){ float vyTemp = v.x; float vxTemp = v.y * -1; return Vector2f(vxTemp, vyTemp); } (Ignore this line) CollisionDetection::CollisionDetection() { } vector<float> CollisionDetection::bubbleSort(vector<float> w) { int temp; bool finished = false; while (!finished) { finished = true; for (int i = 0; i < w.size()-1; i++) { if (w[i] > w[i+1]) { temp = w[i]; w[i] = w[i+1]; w[i+1] = temp; finished=false; } } } return w; } class Vector{ public: //static int dp_count; static float dot(sf::Vector2f a,sf::Vector2f b){ //dp_count++; return a.x*b.x+a.y*b.y; } static float length(sf::Vector2f a){ return sqrt(a.x*a.x+a.y*a.y); } static Vector2f add(Vector2f a, Vector2f b) { return Vector2f(a.x + b.y, a.y + b.y); } static sf::Vector2f getNormal(sf::Vector2f a,sf::Vector2f b){ sf::Vector2f n; n=a-b; n/=Vector::length(n);//normalise float x=n.x; n.x=n.y; n.y=-x; return n; } }; bool CollisionDetection::CheckCollision(BouncingThing & x, BouncingThing & y) { vector<Vector2f> xVerts = x.getVerts(); vector<Vector2f> yVerts = y.getVerts(); vector<Vector2f> xNormals = x.getNormals(); vector<Vector2f> yNormals = y.getNormals(); int size; vector<float> xRange; vector<float> yRange; for(int j = 0; j < xNormals.size(); j++) { Vector p; for(int i = 0; i < xVerts.size(); i++) { xRange.push_back(p.dot(xNormals[j], Vector2f(xVerts[i].x, xVerts[i].x))); } for(int i = 0; i < yVerts.size(); i++) { yRange.push_back(p.dot(xNormals[j], Vector2f(yVerts[i].x , yVerts[i].y))); } yRange = bubbleSort(yRange); xRange = bubbleSort(xRange); if(xRange[xRange.size() - 1] < yRange[0] || yRange[yRange.size() - 1] < xRange[0]) { return false; } float x3 = Min(xRange[0], yRange[0]); float y3 = Max(xRange[xRange.size() - 1], yRange[yRange.size() - 1]); float length = Max(x3, y3) - Min(x3, y3); } for(int j = 0; j < yNormals.size(); j++) { Vector p; for(int i = 0; i < xVerts.size(); i++) { xRange.push_back(p.dot(yNormals[j], xVerts[i])); } for(int i = 0; i < yVerts.size(); i++) { yRange.push_back(p.dot(yNormals[j], yVerts[i])); } yRange = bubbleSort(yRange); xRange = bubbleSort(xRange); if(xRange[xRange.size() - 1] < yRange[0] || yRange[yRange.size() - 1] < xRange[0]) { return false; } } return true; } float CollisionDetection::Min(float min, float max) { if(max < min) { min = max; } else return min; } float CollisionDetection::Max(float min, float max) { if(min > max) { max = min; } else return min; } On the screen the objects will freeze for a small amount of time before moving off again. However the problem is is that when this happens there are no collisions actually happening and I would really love to find out where the flaw is in the code. If you need any more information/code please don't hesitate to ask and I'll reply as soon as possible Regards, AzKai

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  • WPF storyboard animation issue when using VisualBrush

    - by Flack
    Hey guys, I was playing around with storyboards, a flipping animation, and visual brushes. I have encountered an issue though. Below is the xaml and code-behind of a small sample I quickly put together to try to demonstrate the problem. When you first start the app, you are presented with a red square and two buttons. If you click the "Flip" button, the red square will "flip" over and a blue one will appear. In reality, all that is happening is that the scale of the width of the StackPanel that the red square is in is being decreased until it reaches zero and then the StackPanel where a blue square is, whose width is initially scaled to zero, has its width increased. If you click the "Flip" button a few times, the animation looks ok and smooth. Now, if you hit the "Reflection" button, a reflection of the red/blue buttons is added to their respective StackPanels. Hitting the "Flip" button now will still cause the flip animation but it is no longer a smooth animation. The StackPanels width often does not shrink to zero. The width shrinks somewhat but then just stops before being completely invisible. Then the other StackPanel appears as usual. The only thing that changed was adding the reflection, which is just a VisualBrush. Below is the code. Does anyone have any idea why the animations are different between the two cases (stalling in the second case)? Thanks. <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xml:lang="en-US" xmlns:d="http://schemas.microsoft.com/expression/blend/2006" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="WpfFlipTest.Window1" x:Name="Window" Title="Window1" Width="214" Height="224"> <Window.Resources> <Storyboard x:Key="sbFlip"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="redStack" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.4" Value="0"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00.4" Storyboard.TargetName="blueStack" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.8" Value="1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> <Storyboard x:Key="sbFlipBack"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="blueStack" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.4" Value="0"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00.4" Storyboard.TargetName="redStack" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.8" Value="1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Grid x:Name="LayoutRoot" Background="Gray"> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <StackPanel Name="redStack" Grid.Row="0" Grid.Column="0" RenderTransformOrigin="0.5,0.5"> <StackPanel.RenderTransform> <ScaleTransform/> </StackPanel.RenderTransform> <Border Name="redBorder" BorderBrush="Transparent" BorderThickness="4" Width="Auto" Height="Auto"> <Button Margin="0" Name="redButton" Height="75" Background="Red" Width="105" /> </Border> <Border Width="{Binding ElementName=redBorder, Path=ActualWidth}" Height="{Binding ElementName=redBorder, Path=ActualHeight}" Opacity="0.2" BorderBrush="Transparent" BorderThickness="4" Name="redRefelction" Visibility="Collapsed"> <Border.OpacityMask> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <LinearGradientBrush.GradientStops> <GradientStop Offset="0" Color="Black"/> <GradientStop Offset=".6" Color="Transparent"/> </LinearGradientBrush.GradientStops> </LinearGradientBrush> </Border.OpacityMask> <Border.Background> <VisualBrush Visual="{Binding ElementName=redButton}"> <VisualBrush.Transform> <ScaleTransform ScaleX="1" ScaleY="-1" CenterX="52.5" CenterY="37.5" /> </VisualBrush.Transform> </VisualBrush> </Border.Background> </Border> </StackPanel> <StackPanel Name="blueStack" Grid.Row="0" Grid.Column="0" RenderTransformOrigin="0.5,0.5"> <StackPanel.RenderTransform> <ScaleTransform ScaleX="0"/> </StackPanel.RenderTransform> <Border Name="blueBorder" BorderBrush="Transparent" BorderThickness="4" Width="Auto" Height="Auto"> <Button Grid.Row="0" Grid.Column="1" Margin="0" Width="105" Background="Blue" Name="blueButton" Height="75"/> </Border> <Border Width="{Binding ElementName=blueBorder, Path=ActualWidth}" Height="{Binding ElementName=blueBorder, Path=ActualHeight}" Opacity="0.2" BorderBrush="Transparent" BorderThickness="4" Name="blueRefelction" Visibility="Collapsed"> <Border.OpacityMask> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <LinearGradientBrush.GradientStops> <GradientStop Offset="0" Color="Black"/> <GradientStop Offset=".6" Color="Transparent"/> </LinearGradientBrush.GradientStops> </LinearGradientBrush> </Border.OpacityMask> <Border.Background> <VisualBrush Visual="{Binding ElementName=blueButton}"> <VisualBrush.Transform> <ScaleTransform ScaleX="1" ScaleY="-1" CenterX="52.5" CenterY="37.5" /> </VisualBrush.Transform> </VisualBrush> </Border.Background> </Border> </StackPanel> <Button Grid.Row="1" Click="FlipButton_Click" Height="19.45" HorizontalAlignment="Left" VerticalAlignment="Top" Width="76">Flip</Button> <Button Grid.Row="0" Grid.Column="1" Click="ReflectionButton_Click" Height="19.45" HorizontalAlignment="Left" VerticalAlignment="Top" Width="76">Reflection</Button> </Grid> </Window> Here are the button click handlers: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Media.Animation; namespace WpfFlipTest { public partial class Window1 : Window { public Window1() { InitializeComponent(); } bool flipped = false; private void FlipButton_Click(object sender, RoutedEventArgs e) { Storyboard sbFlip = (Storyboard)Resources["sbFlip"]; Storyboard sbFlipBack = (Storyboard)Resources["sbFlipBack"]; if (flipped) { sbFlipBack.Begin(); flipped = false; } else { sbFlip.Begin(); flipped = true; } } bool reflection = false; private void ReflectionButton_Click(object sender, RoutedEventArgs e) { if (reflection) { reflection = false; redRefelction.Visibility = Visibility.Collapsed; blueRefelction.Visibility = Visibility.Collapsed; } else { reflection = true; redRefelction.Visibility = Visibility.Visible; blueRefelction.Visibility = Visibility.Visible; } } } } UPDATE: I have been testing this some more to try to find out what is causing the issue I am seeing and I believe I found what is causing the issue. Below I have pasted new xaml and code-behind. The new sample below is very similar to the original sample, with a few minor modifications. The xaml basically consists of two stack panels, each containing two borders. The second border in each stack panel is a visual brush (a reflection of the border above it). Now, when I click the "Flip" button, one stack panel gets its ScaleX reduced to zero, while the second stack panel, whose initial ScaleX is zero, gets its ScaleX increased to 1. This animation gives the illusion of flipping. There are also two textblocks which display the scale factor of each stack panel. I added those to try to diagnose my issue. The issue is (as described in the oringal post) that the flipping animation is not smooth. Every time I hit the flip button, the animation starts but whenever the ScaleX factor gets to around .14 to .16, the animation looks like it stalls and the stack panels never have there ScaleX reduced to zero, so they never totally disappear. Now, the strange thing is that if I change the Width/Height properties of the "frontBorder" and "backBorder" borders defined below to use explict values instead of Auto, such as Width=105 and Height=75 (to match the button in the border) everything works fine. The animation stutters the first two or three times I run it but after that the flips are smooth and flawless. (BTW, when an animation is run for the first time, is there something going on in the background, some sort of initialization, that causes it to be a little slow the first time?) Is it possible that the Auto Width/Height of the borders are causing the issue? I can reproduce it everytime but I am not sure why Auto Width/Height would be a problem. Below is the sample. Thanks for the help. <Window x:Class="FlipTest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Window.Resources> <Storyboard x:Key="sbFlip"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="front" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="0"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00.5" Storyboard.TargetName="back" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> <Storyboard x:Key="sbFlipBack"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="back" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="0"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00.5" Storyboard.TargetName="front" Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleX)"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="1"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Grid x:Name="LayoutRoot" Background="White" ShowGridLines="True"> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="Auto"/> </Grid.ColumnDefinitions> <StackPanel x:Name="front" RenderTransformOrigin="0.5,0.5"> <StackPanel.RenderTransform> <ScaleTransform/> </StackPanel.RenderTransform> <Border Name="frontBorder" BorderBrush="Yellow" BorderThickness="2" Width="Auto" Height="Auto"> <Button Margin="0" Name="redButton" Height="75" Background="Red" Width="105" Click="FlipButton_Click"/> </Border> <Border Width="{Binding ElementName=frontBorder, Path=ActualWidth}" Height="{Binding ElementName=frontBorder, Path=ActualHeight}" Opacity="0.2" BorderBrush="Transparent"> <Border.OpacityMask> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <LinearGradientBrush.GradientStops> <GradientStop Offset="0" Color="Black"/> <GradientStop Offset=".6" Color="Transparent"/> </LinearGradientBrush.GradientStops> </LinearGradientBrush> </Border.OpacityMask> <Border.Background> <VisualBrush Visual="{Binding ElementName=frontBorder}"> <VisualBrush.Transform> <ScaleTransform ScaleX="1" ScaleY="-1" CenterX="52.5" CenterY="37.5" /> </VisualBrush.Transform> </VisualBrush> </Border.Background> </Border> </StackPanel> <StackPanel x:Name="back" RenderTransformOrigin="0.5,0.5"> <StackPanel.RenderTransform> <ScaleTransform ScaleX="0"/> </StackPanel.RenderTransform> <Border Name="backBorder" BorderBrush="Yellow" BorderThickness="2" Width="Auto" Height="Auto"> <Button Margin="0" Width="105" Background="Blue" Name="blueButton" Height="75" Click="FlipButton_Click"/> </Border> <Border Width="{Binding ElementName=backBorder, Path=ActualWidth}" Height="{Binding ElementName=backBorder, Path=ActualHeight}" Opacity="0.2" BorderBrush="Transparent"> <Border.OpacityMask> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <LinearGradientBrush.GradientStops> <GradientStop Offset="0" Color="Black"/> <GradientStop Offset=".6" Color="Transparent"/> </LinearGradientBrush.GradientStops> </LinearGradientBrush> </Border.OpacityMask> <Border.Background> <VisualBrush Visual="{Binding ElementName=backBorder}"> <VisualBrush.Transform> <ScaleTransform ScaleX="1" ScaleY="-1" CenterX="52.5" CenterY="37.5" /> </VisualBrush.Transform> </VisualBrush> </Border.Background> </Border> </StackPanel> <Button Grid.Row="1" Click="FlipButton_Click" Height="19.45" HorizontalAlignment="Left" VerticalAlignment="Top" Width="76">Flip</Button> <TextBlock Grid.Row="2" Grid.Column="0" Foreground="DarkRed" Height="19.45" HorizontalAlignment="Left" VerticalAlignment="Top" Width="76" Text="{Binding ElementName=front, Path=(UIElement.RenderTransform).(ScaleTransform.ScaleX)}"/> <TextBlock Grid.Row="3" Grid.Column="0" Foreground="DarkBlue" Height="19.45" HorizontalAlignment="Left" VerticalAlignment="Top" Width="76" Text="{Binding ElementName=back, Path=(UIElement.RenderTransform).(ScaleTransform.ScaleX)}"/> </Grid> </Window> Code-behind: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Media.Animation; namespace FlipTest { /// <summary> /// Interaction logic for Window1.xaml /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); } bool flipped = false; private void FlipButton_Click(object sender, RoutedEventArgs e) { Storyboard sbFlip = (Storyboard)Resources["sbFlip"]; Storyboard sbFlipBack = (Storyboard)Resources["sbFlipBack"]; if (flipped) { sbFlipBack.Begin(); flipped = false; } else { sbFlip.Begin(); flipped = true; } } } }

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  • How to draw an UIImageView in -drawRect:?

    - by mystify
    I'm trying since 5 hours now: - (void)drawRect:(CGRect)rect { // flip the wrong coordinate system CGContextTranslateCTM(context, 0.0f, rect.size.height); //shift the origin up CGContextScaleCTM(context, 1.0f, -1.0f); //flip the y-axis CGContextDrawImage(context, myImgView.frame, myImageView.image.CGImage); } The problem: While the image draws correctly, the coordinates specified by the UIImageView frame are completely useless. The image appears placed completely wrong on screen. I guess I must also flip the CGRect of the UIImageView? But how?

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  • flipping 2d components in java

    - by aniket
    i am trying to flip a pentahex (5 hexagons joined at their sides). Is it possible to do so in Java? I mean suppose 2 of the 3 hexagons are in one quadrant can I change their quadrant? It is similar to what we do to flip images in Paint. The same utility I am trying to perform in Java. I have heard about Affine transform wherein it makes use of a bit called TYPE_FLIP, but I am not sure how to use it. Any small example would be of great help. Note: I do not want to flip images, but actual 2D objects.

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  • Flipping an image using a one dimensional array of characters.

    - by Jeff
    I have the data of an image loaded into memory as a one dimensional array. Since I'm trying to use OpenGL to draw it, and since it reads from the bottom up, I want to try and flip the elements of the array before they're sent to OpenGL. Maybe there's a way to tell OpenGL to read from the top to the bottom? Anyways, I tried using a few methods of sorting arrays and they also flip the image horizontally, which is very much like the original problem. So can I flip the data only one way?

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  • Truly Random Numbers

    German researchers use a "flip-flop" to improve random number generator Random number generation - Algorithms - Pseudorandom Numbers - Math - Recreation

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  • How do I fix dragging windows to the adjacent workspace?

    - by Bill O'Dwyer
    I installed CompizConfig-Settings-Manager and I put on all the settings I liked and had in 11.10, including the ability to drag my windows to the adjacent workspace. It's under the Desktop Wall section, on the Edge Flipping tab and I've checked "Edge Flip Move" and "Edge Flip DnD." In 11.10, the movement was smooth between each workspace, and the window would still be "grabbed" in the same place. In 12.04, it's leaving the window behind and the mouse appears to be "grabbing" nothing, but I'm still holding onto the window, and I can still move and place it within the workspace (or indeed the previous workspace as it won't appear in the desired place until I drag the mouse all the way to the edge of the screen). Any way to fix this? I'm running 12.04 beta 2.

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  • Fliping the video stream in Sony Vegas Studio!

    - by NoCanDo
    How do I flip a video stream, making it effectively appear to run backwards. For example, I've got a 6 second video stream. I cut it at 2, 4, 6, so I've got now 3 seperate streams with 2 seconds each. 1-2 ; 3-4; 5-6 - That how it'll be displayed normal. Now what I want to do in Sony Vegas is to copy/paste and flip a selected stream. Let say: 1-2; 3-4; 3'-4' (copy/pasted); 5-6 - Now I've got a video stream with 8 seconds. Now I want to flip this copy pasted making it effectively run backwards. 1-2; 3-4; 4'-3'; 5-6. The idea is I want something like a movie, it goes, and goes and goes, then a text appears "WAIT! What just happend?", then the movie goes back to second 3 (1-2-3-4-'WAIT, WHAT JUST HAPPEND?'-4-3-4-5-6. I hope you get what I want to do in Sony Vegas.

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  • Flipping the video stream in Sony Vegas Studio!

    - by NoCanDo
    How do I flip a video stream, making it effectively appear to run backwards? For example, I've got a 6 second video stream. I cut it at 2, 4, 6, so I've got now 3 seperate streams with 2 seconds each. 1-2 ; 3-4; 5-6 - That's how it'll be displayed normally. Now what I want to do in Sony Vegas is to copy/paste and flip a selected stream. Let say: 1-2; 3-4; 3'-4'; 5-6 - The second 3-4 is copy/pasted; now I've got a video stream with 8 seconds. Now I want to flip this copy pasted making it effectively run backwards. 1-2; 3-4; 4'-3'; 5-6. The idea is I want something like a movie, it goes, and goes and goes, then a text appears "WAIT! What just happend?", then the movie goes back to second 3. 1-2-3-4-'WAIT! What just happened?'-4-3-4-5-6. I hope you get what I want to do in Sony Vegas.

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  • Revisioning the CeBIT 2011

    - by hechtsuppe
    Hey guys, I am living in the CeBIT's hometown, the beautiful city Hanover. So I am visiting this exhibition since 2002 and I've seen a lot of changes during all this time. But this time, it was the most boring fair I've ever seen. Lets start with the first halls: "The same procedure as every year"- directly behind the entrance are the exhibitioners from far east (China, Taiwan...). In the past, they've shown a lot of nice toys. But this time, they got very serious, the only great gimmick was the motorcycle suitcase for the iPad, I watched the presentation until I reminded myself that I am not owning an iPad and these cases weren't suitable for my BMW motorcycle. So I started looking for the business stuff (I was there for business). I walked deeper in the exhibition area: During the way to the business halls, I came across a hall where I heard a big bass- the gamer's hall I think so I made a quick getaway from there. I saw a lot of teenagers with gaming bags on thier shoulders and I was really confused. I thought 'Damn it is tuesday 11:00 am, the trade fair is opened for public on saturday, why they are here and not at school?'. So the german schools seem to be too easy for students. At the time I was a pupil I visited the CeBIT on saturday! At the business halls: I visited IBM's booth but there were only guys looking like penguins and I weared a white chemise. So nobody was interested in talking to me. At the coffeebar I met a very nice guy from Bangladesh I think he was round about 25, but he told me that he was the first time in germany and he thought that germans are still nazis. I laughed at him and went to DELL. I was really really really interested in client solutions from DELL because I want to get away from our current client manufacturer. At the DELL booth I became recognized and a really nice guy told me where to use which client products. But there were too many people for trying the notebooks so the DELL guy asked for my business card. But I am still waiting for information, dear 'DELL dude'. I went to the Microsoft booth for informing myself about new IT trends. There were nothig new, only a few presentations about the 'new' Windows Live, Windows Phone 7 and 'the allmighty cloud'. But there was a very small presentation corner with the title 'geeks corner'. A guy inside the 'geeks corner' started Visual Studio 2010, I was really agog for the presentation. But then he started talking about Windows Phone 7 and how to program. He began with drag'n drop a textbox and a button on the form. He wrote really basic code and explained the functionality of a textbox- then I stood up and left the room. At the end: Before leaving the fairground, I've visited a few small booths and the big anti-virus program companies. But there was nothing new, I was really disappointed  this year. I've seen only ten exhibition babes and the rest of the week I stood ~3 hours in traffic jams. But I really love the flair in the whole town during this exhibition. The people in the city railways, which are really confused and the people in the pubs. Cheers Vince

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  • T-SQL Tuesday - the swag

    - by Rob Farley
    This month’s T-SQL Tuesday is hosted by Kendal van Dyke (@SQLDBA), and is on the topic of swag. He asks about the best SQL Server swag that we’ve ever received from a conference. I can’t say I ever focus on getting the swag at conferences, as I see some people doing. I know there are plenty of people that get around all the sponsors as soon as they’ve arrived, collecting whatever goodies they can, sometimes as token gifts for those at home, sometimes as giveaways for the user groups they attend. I remember a few years ago at my first PASS Summit, the SQLCAT team gave me a large pile of leftover SQL Server swag to give away to my user group – piles of branded things to stop your phone sliding off your car dashboard, and other things. The user group members thought it was great, and over the course of a few months, happily cleared me out of it all. I tend to consider swag to be something that you haven’t earned except by being at a conference, and there was no winning associated with it, it was simply a giveaway item at a sponsor booth. That means I don’t include the HP Mini laptop that was given away at TechEd Australia a few years ago to every attendee, or the SQL Server bag and Camelbak bottle that I was given as a thank-you for writing a guest blog post (which I use as my regular laptop bag and water bottle for work). I don’t even include the copy of Midtown Madness that I got as a door prize at my vey first TechEd event in 1999 (that was a really good game, and even meant that when I went to Chicago last year, I felt a strange familiarity about the place). I don’t want to include shirts in the mix either. I was given a nice SQL Server shirt about five years ago TechEd Australia. It’s a business shirt (buttons, cuffs, pocket on the chest), black with the SQL Server logo on it. It was such a nice shirt that I commented about it to the Product Marketing Manager for Australia (Christine, at the time), who unexpectedly arranged for me to get another one. That was certainly an improvement on the tent I was given at one of the MVP conference I attended. So when I consider these ‘rules’, two pieces of swag come to mind, and I think both were at PASS Summits (although I can’t be sure). One was a hand-warmer from HP, one of the “crystallisation-type” ones, which proved extremely popular when I got home, until one day when it didn’t survive being recharged – not overly SQL related, but still it was good swag. The other was an umbrella, from expressor, which was from the PASS Summit in 2010, my first PASS Summit. I remember it well – Blythe Morrow (now Gietz) (@blythemorrow) was working the booth, having stopped working for PASS some time before, but she’d been on my list of people to meet, as I’d had plenty of contact with her while she’d worked at PASS, my being a chapter leader and general volunteer. There had been an expressor dinner on one of the first evenings, which I’d been asked to be at, which is when I’d met lots of SQL people in person for the first time, including Ted Krueger (@onpnt), Jessica Moss (@jessicamoss) and Blythe. Anyway, at some point the next day I swung by their booth to say hello and thank them for the dinner, and Blythe says “Oh, we have the best swag – here!” and handed me an umbrella. And she was right. It’s excellent. @rob_farley

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  • June is going to be a busy month!

    - by Monica Kumar
    Who says things slow down in summer? Well, maybe for school kids, but certainly not for Oracle's Virtualization team! June is turning out to be one of the busiest months for us. We are going to be participating in a number of industry events. If you happen to be at any of these, please stop by the Oracle booth and our session/s. Let's go through a run down of these events. 1. 13th Annual Call Center Week June 4-8 Ceasar's Palace, Las Vegas  Event website You're now wondering...why are we at this call center show. It's really simple, Oracle's Desktop Virtualization solutions offer the best way for call center to reliably and securely access enterprise apps using a variety of endpoint devices such as an iPad or a Sun Ray Client. Provisioning new employees becomes a breeze. We'll be jointly showcasing our solution with Oracle's CRM team. Come check us out.  2. Gartner Infrastructure & Management, Florida June 5-7 Orlando, FL  Event website Oracle is a Premier sponsor of the Gartner IOM Summit this June 5 – 7, 2012 in Orlando, FL.  Attendees will have the opportunity to meet with Oracle experts in a variety of sessions, including demonstrations during the showcase receptions. 3. Cloud Expo East Check out our website for details of our participation. Stop by at booth 511 to talk to our Cloud, Virtualization and Big Data experts. In addition, we're delivering a number of sessions at Cloud Expo. The one I want to highlight is the following: Session: Borderless Applications in the Cloud with Oracle VM and Oracle Virtual Assembly Builder Abstract: As virtualization adoption progresses beyond server consolidation, this is also transforming how enterprise applications are deployed and managed in an agile environment. The traditional method of business-critical application deployment where administrators have to contend with an array of unrelated tools, custom scripts to deploy and manage applications, OS and VM instances into a fast changing cloud computing environment can no longer scale effectively to achieve response time and desired efficiency. Oracle VM and Oracle Virtual Assembly Builder allow applications, associated components, deployment metadata, management policies and best practices to be encapsulated into ready-to-run VMs for rapid, repeatable deployment and ease of management. Join us in this Cloud Expo session to see how Oracle VM and Oracle Virtual Assembly Builder allow you to deploy complex multi-tier applications in minutes and enables you to easily onboard existing applications to cloud environments.  Get your free Cloud Expo pass now!  We're offering complimentary VIP Gold Passes. Go to https://www.blueskyz.com/v3/Login.aspx?ClientID=19&EventID=56&sg=177, click “Continue” if you are a New User or log-in if you have already created an account. Once there, you can view the Agenda or Register for Cloud Expo. To register - fill out the basic business card questions and then enter oracleVIPgold in the Priority Code field to change the price from $2,000 to $0. 4. CiscoLive 2012  June 10-14 San Diego, CA Event website Our Oracle VM and Oracle Linux experts will talk about joint collaboration with Cisco on UCS. We'll also highlight customer use cases. 5. Gartner Infrastructure & Operations Management Summit, EMEA Dates: June 11-12 Frankfurt, Germany Event website Meet experts from our Virtualization and Linux team in EMEA. Stop by our booth and find out what's new in Oracle VM Server for x86 and Oracle Linux. June is going to be busy.

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  • popViewControllerAnimated not working, but back button works

    - by Manu
    Hi, I am creating an application based on the Utility template. The main screen consists of a menu with several buttons, each of which creates a different flip-side view. In one of those flip-side views I also configured a Navigation Controller, which works perfectly as long as I have the NavigationBar activated... I can push the view but I have to use the "back" button to return to my flip-side view, which would be the root of the Navigation Controller. The problem comes if I try to go back using "popViewControllerAnimated", properly configured with a button, instead of the "back" button of the NavigationBar. My application crashes for some reason and I am not able to understand why. I could just use the "back" button in the NavigationBar and forget about the problem, but I would prefer to have my own button in order to go back. My app consists of the following: My APPDelegate.m: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { MenuViewController *menuController = [[MenuViewController alloc] initWithNibName:@"MenuView" bundle:nil]; self.menuViewController = menuController; [menuController release]; menuViewController.view.frame = [UIScreen mainScreen].applicationFrame; [window addSubview:[menuViewController view]]; [window makeKeyAndVisible]; return YES; } MenuViewController.m starting my flip-side view: - (IBAction)showFuelUpliftView { FuelUpliftViewController *controller = [[FuelUpliftViewController alloc] initWithNibName:@"FuelUpliftView" bundle:nil]; controller.delegate = self; controller.title = @"Fuel Uplift"; UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:controller]; [navController setNavigationBarHidden: NO]; navController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:navController animated:YES]; [navController release]; [controller release]; } FuelUpliftViewController.m, where I push the second view of the NavigationController with a button: - (IBAction)showFuelUplift2View:(id)sender { UIViewController *controller = [[UIViewController alloc] initWithNibName:@"FuelUplift2View" bundle:nil]; controller.title = @"Settings"; [self.navigationController pushViewController:controller animated:YES]; [controller release]; } And finally, my FuelUplift2ViewController.m, where the app crashes when trying to go back: - (IBAction)backFromFuelUplift2View { [self.navigationController popViewControllerAnimated:YES]; } I do not know if all this makes sense, I am currently beginning with my first application and am still learning thanks to the traditional trial an error method. Nevertheless, I cannot see the reason for this problem and would appreciate any help I can get. Thanks very much, Manu

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