Implementing a mouse click event on a tile in a map

On a sufficiently small map with a suitable projection, you can transform between coordinate systems using linear interpolation relative to the enclosing panel. Noting the following proportions, you can cross-multiply and solve for the missing coordinate, as shown in this complete example that maps mouse coordinates to pixel coordinates in an image. mouse.x : panelWidthInPixels … Read more

What is the most reliable way to hide / spoof the referrer in JavaScript?

I have found a solution which works in Chrome and Firefox. I’ve implemented the code in a Userscript, Don’t track me Google. Demo (tested in Firefox 9 and Chrome 17): http://jsfiddle.net/RxHw5/ Referrer hiding for Webkit (Chrome, ..) and Firefox 37+ (33+*) Webkit-based browsers (such as Chrome, Safari) support <a rel=”noreferrer”>spec. Referrer hiding can fully be … Read more

ActionListener for a specific text inside a JTextArea?

Here try this small program, try to click at the start of student://, that will pop up a message Dialog import java.awt.*; import java.awt.event.*; import javax.swing.*; public class TextAreaExample extends JFrame { private JTextArea tarea = new JTextArea(10, 10); private JTextField tfield = new JTextField(10); private void createAndDisplayGUI() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); tarea.setText(“Hello there\n”); tarea.append(“Hello student://”); JScrollPane … Read more

How do you Hover in ReactJS? – onMouseLeave not registered during fast hover over

Have you tried any of these? onMouseDown onMouseEnter onMouseLeave onMouseMove onMouseOut onMouseOver onMouseUp SyntheticEvent it also mentions the following: React normalizes events so that they have consistent properties across different browsers. The event handlers below are triggered by an event in the bubbling phase. To register an event handler for the capture phase, append Capture … Read more

JButton() only working when mouse hovers

add Icon/ImageIcon directly to the JButton instead of paint() for AWT or paintComponent() for Swing JComponents Contructor JButton(Icon) knows Icon or ImageIcon from code import java.awt.*; import javax.swing.*; public class ButtonsIcon extends JFrame { private static final long serialVersionUID = 1L; private ImageIcon errorIcon = (ImageIcon) UIManager.getIcon(“OptionPane.errorIcon”); private Icon infoIcon = UIManager.getIcon(“OptionPane.informationIcon”); private Icon warnIcon … Read more

When to choose mouseover() and hover() function?

From the official jQuery documentation .mouseover() Bind an event handler to the “mouseover” JavaScript event, or trigger that event on an element. .hover() Bind one or two handlers to the matched elements, to be executed when the mouse pointer enters and leaves the elements. Calling $(selector).hover(handlerIn, handlerOut) is shorthand for: $(selector).mouseenter(handlerIn).mouseleave(handlerOut); .mouseenter() Bind an event … Read more

Java ball object doesn’t bounce off of drawn rectangles like it’s supposed to.

I finally found a edge detection system I like… Basically, the magic happens here… // Detect if we collided with any one (collision is the rectangle, bounds is us) if (collision.intersects(bounds)) { // Determine the intersect of the collision… insect = collision.intersection(bounds); // Flags… boolean vertical = false; boolean horizontal = false; boolean isLeft = … Read more