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I need to just have a panel inside of which i'd be able to draw. I want to be able to draw pixel by pixel.
ps: I don't need lines/circles other primitives. pps: the graphics library does not really matter, it can be awt, swing, qt.. anything. I just want to have something that is usually represented by Bufferedimage or somethign like that where you set colors of single pixels and then render it to the screen.
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paintComponent(Graphics g) is a method inherited from JComponent (Note that paintComponent should have @Override anotation), it is part of the draw system of the GUI. It's invoked from Java Swing Framework to ask for a Component to draw itself on the screen.
Solution: Write a method, drawCircle() , which has parameters for the coordinates of the center point and a radius. It then calls drawOval with transformed parameters. To make a drawing, define a new component by subclassing JPanel and overriding the paintComponent() method.
You can color a single pixel in a Java drawing by drawing a line with the same start point and end point. Before you can draw pixels, you must create a JFrame or other visible component and add a custom component with an overridden paint method.
An example of one way to do it:
// Create the new image needed
img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB );
for ( int rc = 0; rc < height; rc++ ) {
for ( int cc = 0; cc < width; cc++ ) {
// Set the pixel colour of the image n.b. x = cc, y = rc
img.setRGB(cc, rc, Color.BLACK.getRGB() );
}//for cols
}//for rows
and then from within overridden paintComponent(Graphics g)
((Graphics2D)g).drawImage(img, <args>)
represented by Bufferedimage ..
I suggest a BufferedImage for that, displayed..
..or something like that where you set colors of single pixels and then render it to the screen.
..in a JLabel - as seen in this answer.
Of course, once we have an instance of BufferedImage, we can setRGB(..).
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