graphics2d

In Java, there is the Graphics2D.fillRect(x, y, width, height) function. In my program, I am looking for something similar, yet completely opposite. I need to fill everything on the screen except this certain x, y, width, height, sort of like an anti-fillRect. Is there a built in function that I am overlooking, or can you point me in the right direction to create one? Not required, but it would be a nice bonus if it could work with other Java 2D shapes. There are a few ways that might be achieved, the easiest might be to use java.awt.geom.Area which is a highly versatile Shape implementation,

I am trying some things out with manually drawing "things" with a Java Graphics2D object within a Swing component and as I reach about >2000 squares that I order the object to draw it gets really slow. I have no clue whether or not this is "common". Are 2000 objects to render really "a lot"? Is the Graphics2D object just not very performant? Should I just stop where I am now and rather switch to JOGL before I try out more complex stuff and it is too late? I wrote a Java Spirograph GUI that draws tens of thousands of line segments in 20 milliseconds or less. Make sure you are doing your

I am trying to display a JComponent inside a JPanel. I am using null layout because location of the components can be changed during runtime and I have to control them. But the following code does not work. The JComponent only becomes visible on display if I explicity call the "paintComponent" method, which I think is not good practice. My JComponent Class public class MyIcon extends JComponent { private double xPos; private double yPos; private double radius = 30; public MyIcon(double xPos, double yPos) { this.xPos = xPos; this.yPos = yPos; this.setBounds((int)xPos, (int)yPos, (int)radius,

I need to capture the graphics primitives from calls to java.awt.Graphics2D. The calls are made through an Open Source toolkit (Apache's PDFBox) and normally rendered in a JPanel. I would like to intercept these calls and translate them to SVG so I can build a non-graphics data model (e.g. tables, graphs, etc.). I'll be happy for any type of hack at this stage, which might include: replacing the Graphics2D library with MyGraphics2D Finding a Graphics2D that supported SVG output and capturing that intercepting the calls to Graphics2D (I'd prefer not because I have to manage the affine

I've read a lot of tutorials on drawing Graphics2D components and adding to JPanel/JFrame but I can't find how to add multiple these components into one JPanel simply. My code below adds only 1 component (line) and I can't find why it isn't possible to add more. What am I doing wrong? Desired behaviour: there should be 3 red lines. My whole code: package Examples; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.BorderFactory; import

I just got the printer to work in java how I need it too, but there's one last problem I need to solve. When it prints, the font's width is rather stretched, and not crisp and clear like it should be. Here is my code my the actual drawing to the paper: FontMetrics metrics = graphics.getFontMetrics(font); int lineHeight = metrics.getHeight(); arrangePage(graphics, pageFormat, lineHeight); if (page > pageBreaks.length){ return NO_SUCH_PAGE; } Graphics2D g = (Graphics2D) graphics; g.translate(pageFormat.getImageableX(), pageFormat.getImageableY()); g.setFont(font); int y = 0; int begin = 0; if

I need to write text in the center of an image. The text to write is not always the same. The code I'm using is here: // Here I first draw the image g.drawImage(img, 22, 15, 280, 225, null); // I get the text String text = photoText.getText(); // Set the text color to black g.setColor(Color.black); // I draw the string g.drawString(text, 79.5F, 220.0F); The problem is that the text isn't at the center of the image, what can I do? I only need to draw the text at the horizontal center. trashgod Using a JLabel is less work, but FontMetrics , shown here , will let you manage the geometry directly.