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  • Java JFrame method pack() problem

    - by Oliver
    Hi, I have a frame with 4 JPanels and 1 JScrollPane, the 4 panels are in border layout north, east, south, west and the scrollpane in the center. I have been trying to get the pack method for a frame fuctioning but when run you just get the title bar of the window. Any Ideas? Thank you in advance. JFrame conFrame; JPanel panel1; JPanel panel2; JPanel panel3; JPanel panel4; JScrollPane listPane; JList list; Object namesAr[]; ... ... ... namesAr= namesA.toArray(); list = new JList(namesAr); list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); list.setLayoutOrientation(JList.HORIZONTAL_WRAP); list.setVisibleRowCount(-3); list.addListSelectionListener(this); listPane = new JScrollPane(list); panel1 = new JPanel(); panel2 = new JPanel(); panel3 = new JPanel(); panel4 = new JPanel(); conFrame.setLayout(new BorderLayout()); panel1.setPreferredSize(new Dimension(100, 100)); panel2.setPreferredSize(new Dimension(100, 100)); panel3.setPreferredSize(new Dimension(100, 100)); panel4.setPreferredSize(new Dimension(100, 100)); panel1.setBackground(Color.red); panel2.setBackground(Color.red); panel3.setBackground(Color.red); panel4.setBackground(Color.red); conFrame.pack(); conFrame.add(panel1, BorderLayout.NORTH); conFrame.add(panel2, BorderLayout.EAST); conFrame.add(panel3, BorderLayout.SOUTH); conFrame.add(panel4, BorderLayout.WEST); conFrame.add(listPane, BorderLayout.CENTER); conFrame.setVisible(true);

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  • How to represent different entities that have identical behavior?

    - by Dominik
    I have several different entities in my domain model (animal species, let's say), which have a few properties each. The entities are readonly (they do not change state during the application lifetime) and they have identical behavior (the differ only by the values of properties). How to implement such entities in code? Unsuccessful attempts: Enums I tried an enum like this: enum Animals { Frog, Duck, Otter, Fish } And other pieces of code would switch on the enum. However, this leads to ugly switching code, scattering the logic around and problems with comboboxes. There's no pretty way to list all possible Animals. Serialization works great though. Subclasses I also thought about where each animal type is a subclass of a common base abstract class. The implementation of Swim() is the same for all Animals, though, so it makes little sense and serializability is a big issue now. Since we represent an animal type (species, if you will), there should be one instance of the subclass per application, which is hard and weird to maintain when we use serialization. public abstract class AnimalBase { string Name { get; set; } // user-readable double Weight { get; set; } Habitat Habitat { get; set; } public void Swim(); { /* swim implementation; the same for all animals but depends uses the value of Weight */ } } public class Otter: AnimalBase{ public Otter() { Name = "Otter"; Weight = 10; Habitat = "North America"; } } // ... and so on Just plain awful. Static fields This blog post gave me and idea for a solution where each option is a statically defined field inside the type, like this: public class Animal { public static readonly Animal Otter = new Animal { Name="Otter", Weight = 10, Habitat = "North America"} // the rest of the animals... public string Name { get; set; } // user-readable public double Weight { get; set; } public Habitat Habitat { get; set; } public void Swim(); } That would be great: you can use it like enums (AnimalType = Animal.Otter), you can easily add a static list of all defined animals, you have a sensible place where to implement Swim(). Immutability can be achieved by making property setters protected. There is a major problem, though: it breaks serializability. A serialized Animal would have to save all its properties and upon deserialization it would create a new instance of Animal, which is something I'd like to avoid. Is there an easy way to make the third attempt work? Any more suggestions for implementing such a model?

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  • iPhone SDK Point to a specific location

    - by lnetanel
    Hi, I'm trying to develop an application that use the GPS and Compass of the iPhone in order to point some sort of pointer to a specific location (like the compass always point to the North). The location is fixed and I always need the pointer to point to that specific location no matter where the user is located. I have the Lat/Long coordinates of this location but not sure how can I point to that location using the Compass and the GPS... any help will be appreciated. Netanel

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  • Great Circle & Ray intersection

    - by Karl T
    I have a Latitude, Longitude, and a direction of travel in degrees true north. I would like to calculate if I will intersect a line defined by two more Lat/Lon points. I figure the two points defining the line would create my great circle and my location and azimuth would define my ray (or possibly a small circle). Any ideas?

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  • Image insertion from SQL info

    - by user528057
    What does 'howard.jpg' do in the sql statement below & how do I insert the image into my android app? CREATE TABLE IF NOT EXISTS employee ( _id INTEGER PRIMARY KEY AUTOINCREMENT, firstName VARCHAR(50), lastName VARCHAR(50), title VARCHAR(50), department VARCHAR(50), managerId INTEGER, city VARCHAR(50), officePhone VARCHAR(30), cellPhone VARCHAR(30), email VARCHAR(30), picture VARCHAR(200)) INSERT INTO employee VALUES(1,'Ryan','Howard','Vice President, North East', 'Management', NULL, 'Scranton','570-999-8888','570-999-8887','[email protected]','howard.jpg')

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  • JXMapViewer change orientation to Heading Up

    - by Charlie
    I am trying to use JXMapViewer (from swingx-ws) with Open Street Maps. I was wondering if it would be possible to display the map tiles in the JXMapViewer based on heading up, rather than on North up. For example, the normal car GPS navigation systems let you do that. I've looked through the documentation and there doesn't seem to be a straightforward way to do this. Is there something else that accomplish this, besides JXMapViewer?

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  • Writing number keypad

    - by theojero
    I am writing a program that prints out telephone numbers that are to be entered by users. On the west side, I need a picture icon of 3 people. In the center, I need the keypads. On the North side, I need the numbers to be displayed. Can someone help with the layout of the buttons?

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  • Mapping Application for Middle East

    - by Faraz
    We have a desktop application that has been using MapPoint for displaying data on a European map. We now want to support Middle East maps, but MapPoint only support North America and Europe. Is there any other alternative to MapPoint that can be easily integrated in a .NET based Win Forms application?

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  • A polygon creation program, adjacent face ignoring not working right. Any solutions?

    - by user292767
    I'm working on a simple program that converts a 3d array into a polygon structure similar to voxels. It reads the array and creates cubes for positions with a value and checks adjacent directions (North,south,east,west,up,down) for a null value before setting up a cube's face. A link that displays the full code is below, written in GLBasic. Some snapshots to show you whats up. link text

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  • Protobuf-net Deserialize Open Street Maps

    - by jonperl
    For the life of me I cannot deserialize the protobuf file from Open Street Maps. I am trying to deserialize the following extract: http://download.geofabrik.de/osm/north-america/us-northeast.osm.pbf to get Nodes and I am using http://code.google.com/p/protobuf-net/ as the library. I have tried to deserialize a bunch of different objects but they all come up null. The proto files can be found here: http://trac.openstreetmap.org/browser/applications/utils/export/osm2pgsql/protobuf Any suggestions?

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  • Java problem cant find image file

    - by user363035
    I am a student working on a homework project. I spent DAYS trying to get the following code to display an image on my new windows 7 laptop. I compiled it and ran it on my old xp pc and it worked! I really want to use my laptop. Any suggestions on how to get it to display the image? import java.awt.*; import java.applet.*; import java.awt.event.*; import java.awt.image.*; public class MoveIt extends Applet implements ActionListener { // set variables and componets private Image cup; Panel keypad = new Panel(); public int top = 15; public int left = 15; private Button keysArray[]; public void init() { cup = getImage(getDocumentBase(), "cup.gif"); Canvas myCanvas = new Canvas(); keysArray = new Button[5]; setLayout(new BorderLayout(5,5)); setBackground(Color.blue); // set up keypad layout keypad.setLayout(new BorderLayout(0,0)); keysArray[0] = new Button("Up"); keysArray[1] = new Button("Left"); keysArray[2] = new Button("Center"); keysArray[3] = new Button("Right"); keysArray[4] = new Button("Down"); // add buttons to the keypad panel keypad.add(keysArray[0], BorderLayout.NORTH); keysArray[0].addActionListener(this); keypad.add(keysArray[1], BorderLayout.EAST); keysArray[1].addActionListener(this); keypad.add(keysArray[2], BorderLayout.CENTER); keysArray[2].addActionListener(this); keypad.add(keysArray[3], BorderLayout.WEST); keysArray[3].addActionListener(this); keypad.add(keysArray[4], BorderLayout.SOUTH); keysArray[4].addActionListener(this); // add canvas and keypad to the BorderLayout add(myCanvas, BorderLayout.NORTH); add(keypad, BorderLayout.SOUTH); } public void paint(Graphics g) { g.drawImage( cup, left, top, this ); } public void actionPerformed(ActionEvent e) { // test for menu item clicks String arg = e.getActionCommand(); if (arg == "Up") top -=15; else if (arg == "Down") top +=15; else if (arg == "Left") left -=15; else if (arg == "Right") left +=15; else { top = 60; left =125; } repaint(); } }

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  • How to get direction information in iPhone application

    - by Buffernet
    Hi, In my app I use the getdistancefrom method in my app and get a distance between a current location and another set location. I would like to as well find the direction the other set location is in. What would the code look like to make this iPhone sdk call. The output would look something like: Location is 500 feet North West Thanks!

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  • Great Circle & Rhumb line intersection

    - by Karl T
    I have a Latitude, Longitude, and a direction of travel in degrees true north. I would like to calculate if I will intersect a line defined by two more Lat/Lon points. I figure the two points defining the line would create my great circle and my location and azimuth would define my Rhumb line. I am only interested in intersections that will occur with a few hundred kilometers so I do not need every possible solution. I have no idea where to begin.

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  • Filter entire NSDictionaries out of NSArray based on multiple keys

    - by user270475
    Hi, I have an NSArray of NSDictionary objects which I would like to be able to return a new array of NSDictionaries from, where every NSDictionary has "Area == North" (for example). The closest example I have found so far is http://stackoverflow.com/questions/958622/using-nspredicate-to-filter-an-nsarray-based-on-nsdictionary-keys but this just returns the unique values for a given key, not the dictionary that has that key. Is there any way to perform a similar operation, and to return the entire dictionary?

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  • Catching multiple keystrokes simultaneously in Cocoa

    - by Vinod Kumar
    I have used 4 NSButtons and assigned them to the 4 arrow keys separately to move in four different directions. Now I want to use two keystrokes, left arrow and up arrow together simultaneously, for north east movement, how can I do it? I am only able to use one keystroke at a time , I need to catch two key strokes simultaneously, I need it for my game project.

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  • BFS algorithm problem

    - by Gorkamorka
    The problem is as follows: A wanderer begins on the grid coordinates (x,y) and wants to reach the coordinates (0,0). From every gridpoint, the wanderer can go 8 steps north OR 3 steps south OR 5 steps east OR 6 steps west (8N/3S/5E/6W). How can I find the shortest route from (X,Y) to (0,0) using breadth-first search? Clarifications: Unlimited grid Negative coordinates are allowed A queue (linked list or array) must be used No obstacles present

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  • Silverlight penetration rate

    - by sthg
    Duplicate of: Silverlight Install Base - How big is it? Hi, Anyone knows the penetration rate (in %) for all North-American internet users with the Silverlight plugin installed? Been looking all around, but couldn't find any comprehensive numbers. I'm looking for General Public penetration rates, not only within the dev community. Something close to Adobe's flash version penetration stats would be great.

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  • How do I write a Oracle SQl query for this tricky question...

    - by atrueguy
    Here is the table data with the column name as Ships. +--------------+ Ships | +--------------+ Duke of north | ---------------+ Prince of Wales| ---------------+ Baltic | ---------------+ In the Outcomes table, transform names of the ships containing more than one space, as follows: Replace all characters between the first and the last spaces (excluding these spaces) by symbols of an asterisk (*). The number of asterisks must be equal to number

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  • JComobox is not showing in the JDialog

    - by Pujan Srivastava
    I have 2 classes. when I put bold 3 lines in the method addCourses() the dialog does not show combobox in the Panel but when I remove from addCourses and put those bold lines in the constructor, JComboBox are shown in the Panel. But data will not show because data items updates to ComboBox will happen after Constructor is created. How can I solve this problem. this.mainPanel.add(courseCombo, BorderLayout.NORTH); this.mainPanel.add(sessionCombo, BorderLayout.CENTER); this.mainPanel.add(courseButton, BorderLayout.SOUTH); public class Updator { CourseListFrame clf = new CourseListFrame(); for(...){ clf.addContentsToBox(displayName, className); } clf.addCourses(); } and second class is public class CourseListFrame extends JDialog implements ActionListener { public JPanel mainPanel = new JPanel(new BorderLayout(2, 2)); public JButton courseButton = new JButton(("Submit")); public JComboBox courseCombo; public JComboBox sessionCombo; public Multimap<String, String> map; // = HashMultimap.create(); public static CourseListFrame courseListDialog; public CourseListFrame() { super(this.getMainFrame()); this.getContentPane().add(mainPanel); map = HashMultimap.create(); courseCombo = new JComboBox(); courseCombo.addItem("Select Courses"); courseCombo.addActionListener(this); sessionCombo = new JComboBox(); } public void addContentsToBox(String course, String session) { map.put(course, session); courseCombo.addItem(course); } public void actionPerformed(ActionEvent e) { JComboBox cb = (JComboBox) e.getSource(); String str = (String) cb.getSelectedItem(); setSessionCombo(str); } public void setSessionCombo(String course) { if (map.containsKey(course)) { sessionCombo.removeAllItems(); Iterator it = map.get(course).iterator(); while (it.hasNext()) { sessionCombo.addItem(it.next()); } } } public void addCourses() { this.mainPanel.add(courseCombo, BorderLayout.NORTH); this.mainPanel.add(sessionCombo, BorderLayout.CENTER); this.mainPanel.add(courseButton, BorderLayout.SOUTH); } public static void showCourseListDialog() { if (courseListDialog == null) { courseListDialog = new CourseListFrame(); } courseListDialog.pack(); courseListDialog.setVisible(true); courseListDialog.setSize(260, 180); } }

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  • How do I write an Oracle SQL query for this tricky question?

    - by atrueguy
    Here is the table data with the column name as Ships. +--------------+ Ships | +--------------+ Duke of north | ---------------+ Prince of Wales| ---------------+ Baltic | ---------------+ Replace all characters between the first and the last spaces (excluding these spaces) by symbols of an asterisk (*). The number of asterisks must be equal to number of replaced characters.

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  • Can I mix declarative and programmatic layout in GWT 2.0?

    - by stuff22
    I'm trying to redo an existing panel that I made before GWT 2.0 was released. The panel has a few text fields and a scrollable panel below in a VerticalPanel. What I'd like to do is to make the scrollable panel with UIBinder and then add that to a VerticalPanel Below is an example I created to illustrate this: public class ScrollTablePanel extends ResizeComposite{ interface Binder extends UiBinder<Widget, ScrollTablePanel > { } private static Binder uiBinder = GWT.create(Binder.class); @UiField FlexTable table1; @UiField FlexTable table2; public Test2() { initWidget(uiBinder.createAndBindUi(this)); table1.setText(0, 0, "testing 1"); table1.setText(0, 1, "testing 2"); table1.setText(0, 2, "testing 3"); table2.setText(0, 0, "testing 1"); table2.setText(0, 1, "testing 2"); table2.setText(0, 2, "testing 3"); table2.setText(1, 0, "testing 4"); table2.setText(1, 1, "testing 5"); table2.setText(1, 2, "testing 6"); } } then the xml: <ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder' xmlns:g='urn:import:com.google.gwt.user.client.ui' xmlns:mail='urn:import:com.test.scrollpaneltest'> <g:DockLayoutPanel unit='EM'> <g:north size="2"> <g:FlexTable ui:field="table1"></g:FlexTable> </g:north> <g:center> <g:ScrollPanel> <g:FlexTable ui:field="table2"></g:FlexTable> </g:ScrollPanel> </g:center> </g:DockLayoutPanel> </ui:UiBinder> Then do something like this in the EntryPoint: public void onModuleLoad() { VerticalPanel vp = new VerticalPanel(); vp.add(new ScrollTablePanel()); vp.add(new Label("dummy label text")); vp.setWidth("100%"); RootLayoutPanel.get().add(vp); } But when I add the ScrollTablePanel to the VerticalPanel, only the first FlexTable (test1) is visible on the page, not the whole ScrollTablePanel. Is there a way to make this work where it is possible to mix declarative and programmatic layout in GWT 2.0?

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  • how can i pass a parameter in a thread in ansi c?

    - by moon
    int NM_Generator = 1; //Aray to store thread handles HANDLE Array_Of_Thread_Handles[1]; //variable to hold handle of North pulse HANDLE Handle_Of_NM_Generator = 0; //Create NM_Generator Thread Handle_Of_NM_Generator = CreateThread( NULL, 0, NMGenerator, &dDifference, 0, NULL); if ( Handle_Of_NM_Generator == NULL) ExitProcess(NM_Generator); i want to pass a parameter double value in it how can i do so?

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