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POJlabel ImageIcon is drawn in negative coordinates
 

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  1. POJlabel ImageIcon is drawn in negative coordinates
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    <p>I have this piece of code from my Graphics Engine library:</p> <pre><code>package WG; import java.awt.*; import java.awt.image.*; import javax.swing.*; public class window { public static boolean running=true; public static int WIDTH = 800, HEIGHT = 600; public static String TITLE = "New Window"; public static JFrame frame; public static int[] pixels; public static BufferedImage img; public static Thread thread; public window(){} public static void create() { img = new BufferedImage(WIDTH, HEIGHT,BufferedImage.TYPE_INT_RGB); pixels = ((DataBufferInt)img.getRaster().getDataBuffer()).getData(); frame = new JFrame("WINDOW"); //frame.setResizable(false); frame.setLayout(new FlowLayout(FlowLayout.LEADING,0,0)); frame.add(new JLabel(new ImageIcon(img))); frame.pack(); //frame.setSize(WIDTH, HEIGHT); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); frame.setLocationRelativeTo(null); frame.setVisible(true); } public void render() { BufferStrategy bs=frame.getBufferStrategy(); if(bs==null){ frame.createBufferStrategy(2); return; } Graphics g= bs.getDrawGraphics(); g.drawImage(img, 0,0, WIDTH, HEIGHT, null); g.dispose(); bs.show(); } public static void clear_screen(){ for (int i = 0; i &lt; WIDTH * HEIGHT; i++) pixels[i] =0; }; } </code></pre> <p>and this piece of code in my main java file:</p> <pre><code>import WG.*; public class Main_window{ private static boolean running = true; public static window wind = new window(); public static Thread thread; public static void main(String[] args) { window.create(); start(); } public static void start() { while (running) { window.clear_screen(); Forms.drawRect(0, 0, 100, 100);//my own method wind.render(); } } } </code></pre> <p><strong>I have 2 problems here:</strong></p> <p>1-->The image on the window is displayed on negative coordinates(the rectangle is not 100x100)</p> <p>If I re-size the window the image is trying to be drawn at 0 0 coordinates but then again is drawn at negative coordinates.<br> <img src="https://i.stack.imgur.com/AFKxK.png" alt="enter image description here"></p> <p>2-->I get 2 different errors:</p> <p>a)Component must be a valid peer at <code>Graphics g= bs.getDrawGraphics();</code> b)Buffers have not been created at <code>bs.show();</code></p> <p>What are these problems?</p> <p>I saw on YouTube on <a href="http://www.youtube.com/playlist?list=ELmvNdIhZY1t4&amp;feature=plcp" rel="nofollow noreferrer">this channel</a> he used Canvas and stuff but he is not getting any errors (I know about not mixing the swing with the awt) </p> <p><strong>EDIT</strong></p> <pre><code> //from graphics library @Override public void paintComponent(Graphics g) { super.paintComponent(g); g.drawImage(img, 0, 0, WIDTH, HEIGHT, null); g.dispose(); } //from the main file public static void start() { while (running) { window.clear_screen(); Forms.drawRect(0, 0, 100, 100);//my own method wind.frame.repaint(); } } </code></pre>
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    1. CO1) Remove all the `static` (they are not the cause of your problems but they are also unnecessary and the sign of a poor design). 2) Use Java conventions (Class start with UC, variables and methods start with an LC, package contain only LC, etc...) 3) Explain what you are trying to do because it seems like you are doing rather complex operations to get a rather simlpe result. You are mixing a bunch of different stuffs which results in tons of bugs. 4) Never perform graphical operations outside the EDT (Event Dispatching Thread)!
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      1. USGuillaume Polet
    2. COI'm trying to make a graphics engine library by converting an array into an image(array to image) and draw it on the screen.It works at TheCherno.
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      1. USboyd
    3. COPlease edit your question to include an [sscce](http://sscce.org/) that exhibits the problem you describe.
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      1. UStrashgod
 

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