is there a easy way to Locate the Drawed Line in my PaintComponent Array to delete this Line.
Like a Eraser?
Here my PaintComponent Class
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.setStroke(new BasicStroke(5));
g2d.setColor(Color.RED);
for (Point[] p : glaslist) {
g2d.setColor(Color.yellow);
g2d.drawLine(p[0].x, p[0].y, p[1].x, p[1].y);
}
for (Point[] p : kupferlist) {
g2d.setColor(Color.ORANGE);
g2d.drawLine(p[0].x, p[0].y, p[1].x, p[1].y);
}
if (startPoint != null && endPoint != null) {
g2d.setColor(Color.RED);
g2d.drawLine(startPoint.x, startPoint.y, endPoint.x, endPoint.y);
}
g2d.dispose();
}
Related
I'm creating a program which has a Nimbus laf, in there i'm using a JScrollPane with a BasicScrollBarUI.
sp = new JScrollPane(lista);
sp.getVerticalScrollBar().setUI(new CustomScrollBarUI());
The problem is that i need the Nimbus laf for some custom buttons, and the BasicScrollBarUI for the scroll bar which i can't make with Nimbus, if i use both my scrollbar gets out of the border.
Just like that
The class i'm using for ScrollBarUI is:
protected void paintTrack(Graphics g, JComponent c, Rectangle r) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Color color = ColorPri;
JScrollBar sb = (JScrollBar) c;
scrollBarWidth = 9;
if (!sb.isEnabled()) {
return;
} else if (isDragging) {
color = ColorSec;
}
g2.setColor(color);
g2.fillRect(r.x, r.y, r.width, r.height);
g2.setColor(color);
g2.fillRect(r.x, r.y, r.width, r.height);
}
#Override
protected void paintThumb(Graphics g, JComponent c, Rectangle r) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Color color = null;
JScrollBar sb = (JScrollBar) c;
if (!sb.isEnabled()) {
return;
} else if (isDragging) {
color = ColorPri;
} else if (isThumbRollover()) {
color = ColorSec;
} else {
color = ColorSec;
}
g2.setPaint(color);
g2.fillRoundRect(1, r.y, 7, r.height, 5, 5);
g2.dispose();
}
#Override
protected void setThumbBounds(int x, int y, int width, int height) {
super.setThumbBounds(x, y, width, height);
scrollbar.repaint();
}
}
The colors are received from the main class
Is there any way to fix it without having to delete the laf or the basicUI?
Thanks in advance
public void paint(Graphics g) {
Rectangle rectangle = new Rectangle(100,100,100,100);
Graphics2D g2d = (Graphics2D) g;
AffineTransform transform = new AffineTransform();
transform.rotate(
Math.toRadians(45), rectangle.getX() + rectangle.width/2,
rectangle.getY() + rectangle.height/2
);
g2d.draw(transform);
}
I am trying to rotate a rectangle around a center, but its not working.
I am getting this error:
The method draw(Shape) in the type Graphics2D is not applicable for the arguments (AffineTransform)
The error indicates that you cannot call this method with transform.
You should try to call setTransform first and then draw the rectangle.
public void paint(Graphics g) {
Rectangle rectangle = new Rectangle(100,100,100,100);
Graphics2D g2d = (Graphics2D) g;
AffineTransform transform = new AffineTransform();
transform.rotate(
Math.toRadians(45), rectangle.getX() + rectangle.width/2,
rectangle.getY() + rectangle.height/2
);
g2d.setTransform(transform);
g2d.draw(rectangle);
}
I'm trying to build Paint app and I doing something wrong in DrawingArea class.
The problem is when I try to draw second shape , the first shape or figure is auto deleting so I need to some idea about how to solve this.All answers acceptable.
THANKS FOR HELP.
There is part of DrawingArea.class codes :
#Override // GETTING FIRST (STARTING) COORDINATE WHEN THE MOUSE PRESSED
public void mousePressed(MouseEvent e) {
oldX = e.getX();
oldY = e.getY();
repaint();
}
#Override // GETTING RELEASED COORDINATE TO DRAW LINE.
public void mouseReleased(MouseEvent e) {
lastX = e.getX();
lastY = e.getY();
repaint();
}
public void mouseClicked(MouseEvent e) {
clickedX = true;
COUNT = e.getClickCount();
}
// GETTING COORDINATE TO DRAW FILLEDRECT,FILLEDOVAL,OVAL,RECT.
public void mouseDragged(MouseEvent e) {
draggedX = e.getX();
draggedY = e.getY();
repaint();
width = Math.abs(oldX - draggedX);
height = Math.abs(oldY - draggedY);
x = Math.min(draggedX, oldX);
y = Math.min(draggedY, oldY);
}
public void mouseMoved(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
// CLEAR THE ALL SHAPES DRAWED ON DRAW AREA.
public void clear() {
g2.setColor(Color.WHITE);
g2.fillRect(0, 0, (int) this.getWidth() + 55, (int) this.getHeight() + 55);
super.repaint();
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (image == null) {
image = new BufferedImage((int) this.getWidth(), (int) this.getHeight(), BufferedImage.TYPE_INT_ARGB);
g2 = (Graphics2D) image.getGraphics();
g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
clear();
}
g2.drawImage(image, 0, 0, getWidth(), getHeight(), this);
g2.dispose();
g.setColor(initialColor);
if (shape == Shapers.PENCIL) {
g.setColor(currentColor);
g.fillOval(draggedX, draggedY, thickness, thickness);
} else if (shape == Shapers.OVAL) {
g.setColor(currentColor);
g.drawOval(oldX, oldY, draggedX, draggedX);
} else if (shape == Shapers.FILLEDOVAL) {
g.setColor(currentColor);
g.fillOval(oldX, oldY, draggedX, draggedY);
} else if (shape == Shapers.RECT) {
g.setColor(currentColor);
g.drawRect(x, y, width, height);
} else if (shape == Shapers.FILLEDRECT) {
g.setColor(currentColor);
g.fillRect(x, y, width, height);
} else if (shape == Shapers.LINE) {
g.setColor(currentColor);
g.drawLine(oldX, oldY, draggedX, draggedY);
oldX = draggedX;
oldY = draggedY;
} else if (shape == Shapers.ERASER) {
g.setColor(Color.WHITE);
g.fillRect(draggedX, draggedY, thickness, thickness);
} else if (shape == Shapers.TEXT) {
if (clickedX == true || COUNT == 2) {
String str = JOptionPane.showInputDialog("Write Your Text Here : ");
g.setFont(myFont);
g.setColor(currentColor);
if (str != null) {
g.drawString(str, oldX, oldY);
COUNT = 0;
} else {
return;
}
}
} else {
COUNT = 0;
return;
}
}
}
You need to either:
Store shapes to be painted in a List and then in the paintComponent() method you paint all the shapes in the List, or
Paint your shapes to a BufferedImage and then just paint the BufferedImage
Check out Custom Painting Approaches for working examples of both approaches and use the approach that best meets your requirement.
I'm trying to build Paint app and I doing something wrong in DrawingArea class.
The problem is when I try to draw second shape , the first shape or figure is auto deleting so I need to some idea about how to solve this.All answers acceptable.
THANKS FOR HELP.
There is part of DrawingArea.class codes :
#Override // GETTING FIRST (STARTING) COORDINATE WHEN THE MOUSE PRESSED
public void mousePressed(MouseEvent e) {
oldX = e.getX();
oldY = e.getY();
repaint();
}
#Override // GETTING RELEASED COORDINATE TO DRAW LINE.
public void mouseReleased(MouseEvent e) {
lastX = e.getX();
lastY = e.getY();
repaint();
}
public void mouseClicked(MouseEvent e) {
clickedX = true;
COUNT = e.getClickCount();
}
// GETTING COORDINATE TO DRAW FILLEDRECT,FILLEDOVAL,OVAL,RECT.
public void mouseDragged(MouseEvent e) {
draggedX = e.getX();
draggedY = e.getY();
repaint();
width = Math.abs(oldX - draggedX);
height = Math.abs(oldY - draggedY);
x = Math.min(draggedX, oldX);
y = Math.min(draggedY, oldY);
}
public void mouseMoved(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
// CLEAR THE ALL SHAPES DRAWED ON DRAW AREA.
public void clear() {
g2.setColor(Color.WHITE);
g2.fillRect(0, 0, (int) this.getWidth() + 55, (int) this.getHeight() + 55);
super.repaint();
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (image == null) {
image = new BufferedImage((int) this.getWidth(), (int) this.getHeight(), BufferedImage.TYPE_INT_ARGB);
g2 = (Graphics2D) image.getGraphics();
g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
clear();
}
g2.drawImage(image, 0, 0, getWidth(), getHeight(), this);
g2.dispose();
g.setColor(initialColor);
if (shape == Shapers.PENCIL) {
g.setColor(currentColor);
g.fillOval(draggedX, draggedY, thickness, thickness);
} else if (shape == Shapers.OVAL) {
g.setColor(currentColor);
g.drawOval(oldX, oldY, draggedX, draggedX);
} else if (shape == Shapers.FILLEDOVAL) {
g.setColor(currentColor);
g.fillOval(oldX, oldY, draggedX, draggedY);
} else if (shape == Shapers.RECT) {
g.setColor(currentColor);
g.drawRect(x, y, width, height);
} else if (shape == Shapers.FILLEDRECT) {
g.setColor(currentColor);
g.fillRect(x, y, width, height);
} else if (shape == Shapers.LINE) {
g.setColor(currentColor);
g.drawLine(oldX, oldY, draggedX, draggedY);
oldX = draggedX;
oldY = draggedY;
} else if (shape == Shapers.ERASER) {
g.setColor(Color.WHITE);
g.fillRect(draggedX, draggedY, thickness, thickness);
} else if (shape == Shapers.TEXT) {
if (clickedX == true || COUNT == 2) {
String str = JOptionPane.showInputDialog("Write Your Text Here : ");
g.setFont(myFont);
g.setColor(currentColor);
if (str != null) {
g.drawString(str, oldX, oldY);
COUNT = 0;
} else {
return;
}
}
} else {
COUNT = 0;
return;
}
}
}
You need to either:
Store shapes to be painted in a List and then in the paintComponent() method you paint all the shapes in the List, or
Paint your shapes to a BufferedImage and then just paint the BufferedImage
Check out Custom Painting Approaches for working examples of both approaches and use the approach that best meets your requirement.
This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 6 years ago.
I've been trying to make a shop for my game.
This has been unsuccessful.
I've tried drawComponent, didn't work.
No errors, code executed, but didn't work.
Now i'm trying to do:
private void render() {
Graphics2D g = (Graphics2D) graphics.getGraphics();
/////////////////////
g.drawImage(img, 0, 0, WIDTH, HEIGHT, null);
/////////////////////
g.dispose();
Graphics2D g2d = (Graphics2D) getGraphics();
g2d.drawImage(img, 0, 0, null);
g2d.dispose();
}
Now i get a NullPointerException on g2d.
I've tried everything.
`Exception in thread "game" java.lang.NullPointerException
at com.johnythecarrot.game.Shop$DrawPane.access$2(Shop.java:123)
at com.johnythecarrot.game.Shop.render(Shop.java:154)
at com.johnythecarrot.game.Game.render(Game.java:75)
at com.johnythecarrot.game.Game.run(Game.java:112)
at java.lang.Thread.run(Unknown Source)`
My goals are to be able to have clickable buttons.
It DID work. But i had to restart almost everytime. Because mostly of the time to code wasn't even executed. So i tried to fix it. Now it's all messed up.
This is the code to it.
(DoubleInt is a part of my library it's nothing more than just x and y. )
public class Shop {
public BuildWindow window;
public static JWindow w;
private int WIDTH = 860, HEIGHT = 440;
private BufferedImage graphics = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
public DrawPane drawPane;
public Shop() {
//window = new BuildWindow().setSize(new DoubleInt(100, 100)).at(wi, he).setTitle("Shop").setOpacity(1).setDragable(false).showEmpty(true);
w = new JWindow();
w.setOpacity(1);
w.setSize(WIDTH, HEIGHT);
w.setLocation(800, 800);
w.setVisible(false);
w.setAlwaysOnTop(true);
//graphics = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
}
private void createShop() {
/***Graphics2D g = (Graphics2D) graphics.getGraphics();
g.setColor(Color.blue);
g.drawString("hey", WIDTH-50, HEIGHT-50);
g.fillRect(0, 0, WIDTH, HEIGHT);*/
}
public class DrawPane extends JPanel {
int width = WIDTH;
int height = HEIGHT;
private ArrayList<Shape> buttons;
private Shape btn1 = new Rectangle2D.Double(20, 60, width/2, height-20);
private Shape btnClose = new Rectangle2D.Double(width-25, 5, 20, 20);
Point wCoords;
Point mCoords;
public DrawPane() {
buttons = new ArrayList<>();
buttons.add(btn1);
buttons.add(btnClose);
addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent e) {
super.mouseClicked(e);
for(Shape s : buttons) {
if(s.contains(e.getPoint())) {
System.out.println("Clicked " + s.getBounds());
if(s == btnClose) {
w.dispose();
}
}
}
}
#Override
public void mousePressed(MouseEvent e) {
mCoords = e.getPoint();
}
#Override
public void mouseReleased(MouseEvent arg0) {
mCoords = null;
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
wCoords = e.getLocationOnScreen();
w.setLocation(wCoords.x - mCoords.x, wCoords.y - mCoords.y);
}
});
}
void repaintThis() {
repaint();
}
BufferedImage img = loadImageFrom.LoadImageFrom(Shop.class, "bar.png");
Graphics gb;
/**
* super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g.setColor(Color.red);
//g.fillRect(0, 0, width, 50);
g.drawImage(img, 0, 0, width, 50, null);
g.setColor(Color.WHITE);
g.drawString("SHOP", 15, 30);
g.drawString("X", width-20, 20);
for(Shape b : buttons) {
g2d.draw(b);
}
System.out.println("Built");
gb = g;
*/
private void render() {
Graphics2D g = (Graphics2D) graphics.getGraphics();
/////////////////////
g.drawImage(img, 0, 0, WIDTH, HEIGHT, null);
/////////////////////
g.dispose();
Graphics2D g2d = (Graphics2D) getGraphics();
g2d.drawImage(img, 0, 0, null);
g2d.dispose();
}
public void Build() {
Graphics g = gb;
Graphics2D g2d = (Graphics2D) g;
g.setColor(Color.red);
//g.fillRect(0, 0, width, 50);
g.drawImage(img, 0, 0, width, 50, null);
g.setColor(Color.WHITE);
g.drawString("SHOP", 15, 30);
g.drawString("X", width-20, 20);
for(Shape b : buttons) {
g2d.draw(b);
}
System.out.println("Built");
}
}
public void render(Graphics2D g) {
drawPane.render();
}
public void addDrawPane() {
drawPane = new DrawPane();
w.add(drawPane);
}
}
If you need access to more code, just ask me.
You should override the paintComponent method like this:
public class DrawPane extends JPanel {
// all your variables and other things
#Override
paintComponent(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
// Your code goes here, use the g2d
}
}
then if you need to repaint your component, simply call repaint() on it.