Control example snippet: print key state, code and character
/*
* Control example snippet: print key state, code and character
*
* For a list of all SWT example snippets see
* http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class Snippet25 {
static String stateMask(int stateMask) {
String string = "";
if ((stateMask & SWT.CTRL) != 0)
string += " CTRL";
if ((stateMask & SWT.ALT) != 0)
string += " ALT";
if ((stateMask & SWT.SHIFT) != 0)
string += " SHIFT";
if ((stateMask & SWT.COMMAND) != 0)
string += " COMMAND";
return string;
}
static String character(char character) {
switch (character) {
case 0:
return "'\\0'";
case SWT.BS:
return "'\\b'";
case SWT.CR:
return "'\\r'";
case SWT.DEL:
return "DEL";
case SWT.ESC:
return "ESC";
case SWT.LF:
return "'\\n'";
case SWT.TAB:
return "'\\t'";
}
return "'" + character + "'";
}
static String keyCode(int keyCode) {
switch (keyCode) {
/* Keyboard and Mouse Masks */
case SWT.ALT:
return "ALT";
case SWT.SHIFT:
return "SHIFT";
case SWT.CONTROL:
return "CONTROL";
case SWT.COMMAND:
return "COMMAND";
/* Non-Numeric Keypad Keys */
case SWT.ARROW_UP:
return "ARROW_UP";
case SWT.ARROW_DOWN:
return "ARROW_DOWN";
case SWT.ARROW_LEFT:
return "ARROW_LEFT";
case SWT.ARROW_RIGHT:
return "ARROW_RIGHT";
case SWT.PAGE_UP:
return "PAGE_UP";
case SWT.PAGE_DOWN:
return "PAGE_DOWN";
case SWT.HOME:
return "HOME";
case SWT.END:
return "END";
case SWT.INSERT:
return "INSERT";
/* Virtual and Ascii Keys */
case SWT.BS:
return "BS";
case SWT.CR:
return "CR";
case SWT.DEL:
return "DEL";
case SWT.ESC:
return "ESC";
case SWT.LF:
return "LF";
case SWT.TAB:
return "TAB";
/* Functions Keys */
case SWT.F1:
return "F1";
case SWT.F2:
return "F2";
case SWT.F3:
return "F3";
case SWT.F4:
return "F4";
case SWT.F5:
return "F5";
case SWT.F6:
return "F6";
case SWT.F7:
return "F7";
case SWT.F8:
return "F8";
case SWT.F9:
return "F9";
case SWT.F10:
return "F10";
case SWT.F11:
return "F11";
case SWT.F12:
return "F12";
case SWT.F13:
return "F13";
case SWT.F14:
return "F14";
case SWT.F15:
return "F15";
/* Numeric Keypad Keys */
case SWT.KEYPAD_ADD:
return "KEYPAD_ADD";
case SWT.KEYPAD_SUBTRACT:
return "KEYPAD_SUBTRACT";
case SWT.KEYPAD_MULTIPLY:
return "KEYPAD_MULTIPLY";
case SWT.KEYPAD_DIVIDE:
return "KEYPAD_DIVIDE";
case SWT.KEYPAD_DECIMAL:
return "KEYPAD_DECIMAL";
case SWT.KEYPAD_CR:
return "KEYPAD_CR";
case SWT.KEYPAD_0:
return "KEYPAD_0";
case SWT.KEYPAD_1:
return "KEYPAD_1";
case SWT.KEYPAD_2:
return "KEYPAD_2";
case SWT.KEYPAD_3:
return "KEYPAD_3";
case SWT.KEYPAD_4:
return "KEYPAD_4";
case SWT.KEYPAD_5:
return "KEYPAD_5";
case SWT.KEYPAD_6:
return "KEYPAD_6";
case SWT.KEYPAD_7:
return "KEYPAD_7";
case SWT.KEYPAD_8:
return "KEYPAD_8";
case SWT.KEYPAD_9:
return "KEYPAD_9";
case SWT.KEYPAD_EQUAL:
return "KEYPAD_EQUAL";
/* Other keys */
case SWT.CAPS_LOCK:
return "CAPS_LOCK";
case SWT.NUM_LOCK:
return "NUM_LOCK";
case SWT.SCROLL_LOCK:
return "SCROLL_LOCK";
case SWT.PAUSE:
return "PAUSE";
case SWT.BREAK:
return "BREAK";
case SWT.PRINT_SCREEN:
return "PRINT_SCREEN";
case SWT.HELP:
return "HELP";
}
return character((char) keyCode);
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
Listener listener = new Listener() {
public void handleEvent(Event e) {
String string = e.type == SWT.KeyDown ? "DOWN:" : "UP :";
string += " stateMask=0x" + Integer.toHexString(e.stateMask)
+ stateMask(e.stateMask) + ",";
string += " keyCode=0x" + Integer.toHexString(e.keyCode) + " "
+ keyCode(e.keyCode) + ",";
string += " character=0x" + Integer.toHexString(e.character)
+ " " + character(e.character);
System.out.println(string);
}
};
shell.addListener(SWT.KeyDown, listener);
shell.addListener(SWT.KeyUp, listener);
shell.setSize(200, 200);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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