// When we get the trigger event, if some rows are selected, show the menu
private void show(MouseEvent e) {
if (e.isPopupTrigger()) { // Only do something if this is the correct event
// Disable all the menu items, we'll enable those that can work next
cutItem.setEnabled(false);
copyItem.setEnabled(false);
pasteItem.setEnabled(false);
deleteItem.setEnabled(false);
selectAllItem.setEnabled(false);
// Find out if our text component is editable or read-only, and if it has some selected text
boolean editable = component.isEditable();
boolean selection = Text.hasText(component.getSelectedText());
// Enable Cut and Delete if the text component is editable and has selected text
if (editable && selection) {
cutItem.setEnabled(true);
deleteItem.setEnabled(true);
}
// Enable Copy if the text component has selected text
if (selection) copyItem.setEnabled(true);
// Enable Paste if the text component is editable and there's text on the clipboard
if (editable && Clipboard.hasText()) pasteItem.setEnabled(true);
// Enable Select All of the text component has text
if (Text.hasText(component.getText())) selectAllItem.setEnabled(true);
// Show the menu to the user
menu.show(e.getComponent(), e.getX(), e.getY());
}
}
/** Insert commas in the given String, turn "1234" into "1,234". */
public static String commas(String s) {
String done = "";
while (s.length() > 3) { // Loop, chopping groups of 3 characters off the end of s
done = "," + Text.end(s, 3) + done;
s = Text.chop(s, 3);
}
return s + done;
}
/**
* Given a number of bytes transferred in a second, describe the speed in kilobytes per second
* like "2.24 KB/s".
*/
public static String speed(int bytesPerSecond) {
int i = (bytesPerSecond * 100) / 1024; // Compute the number of hundreadth kilobytes per second
if (i == 0) return ""; // Return "" instead of "0.00 KB/s"
else if (i < 10) return ("0.0" + i + " KB/s"); // 1 digit "0.09 KB/s"
else if (i < 100) return ("0." + i + " KB/s"); // 2 digits "0.99 KB/s"
else if (i < 1000)
return (Text.start(Number.toString(i), 1)
+ "."
+ Text.clip(Number.toString(i), 1, 2)
+ " KB/s"); // 3 digits "9.99 KB/s"
else if (i < 10000)
return (Text.start(Number.toString(i), 2)
+ "."
+ Text.clip(Number.toString(i), 2, 1)
+ " KB/s"); // 4 digits "99.9 KB/s"
else
return commas(Text.chop(Number.toString(i), 2))
+ " KB/s"; // 5 or more "999 KB/s" or "1,234 KB/s"
}
public void actionPerformed(ActionEvent a) {
try {
// Get the selected text, and the text before and after it
String s = component.getText();
int i = component.getSelectionStart(); // The index where the selection starts
int size = component.getSelectionEnd() - i; // The number of selected characters
String before = Text.start(s, i);
String selected = Text.clip(s, i, size);
String after = Text.after(s, i + size);
// The user clicked "Cut" on the menu
if (a.getActionCommand().equals("Cut")) {
Clipboard.copy(selected);
component.setText(before + after); // Remove the selected text
component.setCaretPosition(i);
// The user clicked "Copy" on the menu
} else if (a.getActionCommand().equals("Copy")) {
Clipboard.copy(selected);
// The user clicked "Paste" on the menu
} else if (a.getActionCommand().equals("Paste")) {
String clipboard = Clipboard.paste(); // Insert text from the clipboard
component.setText(before + clipboard + after);
component.setCaretPosition(i + clipboard.length());
// The user clicked "Delete" on the menu
} else if (a.getActionCommand().equals("Delete")) {
component.setText(before + after); // Remove the selected text
component.setCaretPosition(i);
// The user clicked "Select All" on the menu
} else if (a.getActionCommand().equals("Select All")) {
component.selectAll();
}
} catch (Exception e) {
Mistake.grab(e);
}
}