public void mouseReleased(MouseEvent e) {
if (e.getSource() == window) {
// Make the pop-up window invisible
popUpWindow.setVisible(false);
}
}
// ===========When a mouse is pressed=======
public void mousePressed(MouseEvent e) {
clickedX = e.getX();
clickedY = e.getY();
xPixelRelative = clickedX - xStartHoriz;
yPixelRelative = clickedY - margin;
float resultClicked;
// Determinate the biggest and the smallest x value
double smallestXvalue = abscissae[0];
double biggestXvalue = abscissae[0];
// Converting pixel values into expression values
for (double xValue : abscissae) {
if (xValue > biggestXvalue) biggestXvalue = xValue;
if (xValue < smallestXvalue) smallestXvalue = xValue;
}
double xValueRange = biggestXvalue - smallestXvalue;
double xPixelRange = 268; // =xAxisLength;
double xPixelPercent = (xPixelRelative - smallestXvalue) / xPixelRange;
float xValueClicked = (float) (xValueRange * xPixelPercent);
try {
// Determine the corresponding y based on the given function and the x resulting from
// pixel-to-value conversion
resultClicked =
ComplexExpressionCalculator.evaluateExpression(function, String.valueOf(xValueClicked));
} catch (IllegalArgumentException iae) {
JOptionPane.showMessageDialog(
this, "" + iae.getMessage() + "", "Error", JOptionPane.ERROR_MESSAGE);
return;
}
// Limit decimal points
displayableX = String.format("%.02f", xValueClicked);
displayableY = String.format("%.02f", resultClicked);
if (e.getSource() == window) {
if (clickedX >= 2 && xPixelRelative <= 270 && yPixelRelative >= 28 && yPixelRelative <= 340) {
System.out.println(
"The mouse clicked at pixel x="
+ xPixelRelative
+ " based on xy reference. Originally it's at pixel x= "
+ e.getX());
System.out.println(
"The mouse clicked at pixel y="
+ yPixelRelative
+ " based on xy reference. Originally it's at pixel y= "
+ e.getY());
coordinatesLabel.setText("For x=" + displayableX + ", y=" + displayableY + " on the curve");
popUpPanel.add(coordinatesLabel, "North");
popUpWindow.getContentPane().add(popUpPanel, "Center");
popUpWindow.setSize(300, 70);
popUpWindow.setLocation(100 + clickedX, 200 + yPixelRelative);
popUpWindow.setTitle("Figure Coordinates");
popUpWindow.setVisible(true);
} else System.out.println("Clicked outside the prescribed range.");
}
}
