graphics

问题 I want to display a tree. But the tree does not appear. What is the problem? Main: package scanner_parser; public class Main { public static void main(String[] args) { Oberflaeche gui = new Oberflaeche(); gui.setVisible(true); } } GUI: import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.*; import javax.swing.*; public class Oberflaeche extends JFrame implements ActionListener { private JPanel cp, top, bottom; private JTextField eingabefeld = new JTextField(); private

问题 I am trying to draw some ellipse in the same panel, and the coordinators are determined by mouse click. Here is my code, this code can only draw one circle. The newer circle is always updating the older circle on the panel. So there is always only one circle. private void panel1_MouseDown(object sender, MouseEventArgs e) { x = e.X; y = e.Y; panel1.Invalidate(); } Graphics g; private void panel1_Paint(object sender, PaintEventArgs e) { g = panel1.CreateGraphics(); g.FillEllipse(Brushes.Red, x

问题 I am trying to draw some ellipse in the same panel, and the coordinators are determined by mouse click. Here is my code, this code can only draw one circle. The newer circle is always updating the older circle on the panel. So there is always only one circle. private void panel1_MouseDown(object sender, MouseEventArgs e) { x = e.X; y = e.Y; panel1.Invalidate(); } Graphics g; private void panel1_Paint(object sender, PaintEventArgs e) { g = panel1.CreateGraphics(); g.FillEllipse(Brushes.Red, x

问题 When you load an image into a PictureBox there is a zoom for the image placement, how do I achieve that same effect with a graphics object? 回答1: I think you mean you want to draw some Image yourself in a Rectangle and using some Graphics object like as the PictureBox renders its Image in Zoom mode. Try the following code. I suppose you want to draw the Image on a Form, the drawing code should be added in a Paint event handler of your form: //The Rectangle (corresponds to the PictureBox

问题 I have created a simple GUI that has 2 circles and 2 squares. When the mouse is clicked the shapes change to a random colour. I would like my shapes to only change colour when the mouse has been clicked inside a shape. Also, at the moment all 4 shapes change colour but I wish for each shape to change colour independently depending on which shape is clicked. package weekThree; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java

问题 I have to make a program that uses C# Generated Graphics to make a replica of my name that I wrote in cursive. Twist is, I have to use Bezier Curves. I've already called a function to make Bezier Curves using 4 points and a gravity concept. My question to you is, What would be the easiest way to make around 10 curves. Here is my function for a Bezier Curve. public static void bezierCurve( Graphics g, double p1x, double p1y, double p2x, double p2y, double p3x, double p3y, double p4x, double

问题 I have to make a program that uses C# Generated Graphics to make a replica of my name that I wrote in cursive. Twist is, I have to use Bezier Curves. I've already called a function to make Bezier Curves using 4 points and a gravity concept. My question to you is, What would be the easiest way to make around 10 curves. Here is my function for a Bezier Curve. public static void bezierCurve( Graphics g, double p1x, double p1y, double p2x, double p2y, double p3x, double p3y, double p4x, double

问题 Here is the entirety of my program. The problem is in the ballroll method, getting the red dot/ ball to move straight down the screen on the y-axis to reach the inner blue circle for a "ripple effect" illusion. Please help me do this. I changed the code from the ball moving along the x axis, it needs to move vertically only. Thank you in advance for your help. import java.awt.Color; import java.awt.Graphics; public class Animation { public static void main(String [] args) { DrawingPanel panel

问题 Here is the entirety of my program. The problem is in the ballroll method, getting the red dot/ ball to move straight down the screen on the y-axis to reach the inner blue circle for a "ripple effect" illusion. Please help me do this. I changed the code from the ball moving along the x axis, it needs to move vertically only. Thank you in advance for your help. import java.awt.Color; import java.awt.Graphics; public class Animation { public static void main(String [] args) { DrawingPanel panel

问题 Here is the entirety of my program. The problem is in the ballroll method, getting the red dot/ ball to move straight down the screen on the y-axis to reach the inner blue circle for a "ripple effect" illusion. Please help me do this. I changed the code from the ball moving along the x axis, it needs to move vertically only. Thank you in advance for your help. import java.awt.Color; import java.awt.Graphics; public class Animation { public static void main(String [] args) { DrawingPanel panel