[英]Double Click Function for Key Listener using Arrays and Array lists in java counts everything as a double click
java KeyListener類沒有雙鍵按下的選項,所以我嘗試使用多個數組和arraylists。
這是相關代碼
private ArrayList<Integer> ButtonsPressedChar = new ArrayList<Integer>();
private ArrayList<Long> ButtonsPressedTimes = new ArrayList<Long>();
private int[] PossiblePresses = new int[222];
private ArrayList<Integer> DoublePresses = new ArrayList<Integer>();
private ArrayList<Integer> ToBeRemovedChars = new ArrayList<Integer>();
private ArrayList<Integer> ToBeRemovedTimes = new ArrayList<Integer>();
private Long LastTimeForDoublePress;
private Long NowTime;
private int PositionTime;
private int PositionChar;
public void DetectDoubleKeyPresses(){
PositionTime = 0;
PositionChar = 0;
NowTime = System.currentTimeMillis();
for(int temp : PossiblePresses){
PossiblePresses[temp] = 0;
}
for(Long temp: ButtonsPressedTimes){
if( temp - NowTime >= 300){
ButtonsPressedChar.remove(PositionTime);
ToBeRemovedTimes.add(PositionTime);
System.out.println("removed");
}
PositionTime++;
}
for(int temp: ToBeRemovedTimes){
ButtonsPressedTimes.remove(temp);
System.out.println("DONE");
}
DoublePresses.clear();
for(Integer temp: ButtonsPressedChar){
System.out.println("hi 1");
if( PossiblePresses[temp] == 0){
System.out.println("First Press" + temp + PossiblePresses[temp]);
PossiblePresses[temp] = 2;
}
else if(PossiblePresses[temp] == 2){
DoublePresses.add(temp);
System.out.println(ButtonsPressedChar.size());
ToBeRemovedChars.add(temp);
ButtonsPressedTimes.remove(PositionChar);
System.out.println("DOUBLE PRESS" + temp.toString()+ PossiblePresses[temp]);
}
System.out.println("hi 2");
PositionChar++;
}
for(Integer temp: ToBeRemovedChars){
while(ButtonsPressedChar.contains(temp)){
ButtonsPressedChar.remove(temp);
}
System.out.println("DONE");
}
ToBeRemovedChars.clear();
LastTimeForDoublePress =NowTime;
}
public class Keys implements KeyListener{
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
if(ButtonsHeld.contains(e.getKeyCode())){
Integer tempInteger = new Integer(e.getKeyCode());
ButtonsHeld.remove(tempInteger);
}
else
System.out.println("ERROR");
System.out.println(e.getKeyCode());
ButtonsPressedChar.add( e.getKeyCode());
ButtonsPressedTimes.add(System.currentTimeMillis())
}
@Override
public void keyPressed(KeyEvent e) {
if(ButtonsHeld.contains(e.getKeyCode())){
System.out.println("Error: Attempted Key Press Twice, original press was not removed from ButtonsHeld");
}
else if(!ButtonsHeld.contains(e.getKeyCode())){
ButtonsHeld.add(e.getKeyCode());
}
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
public ArrayList<Integer> ButtonsHeld = new ArrayList<Integer>();
public void KeyHeldChecker(){
}
}
我很抱歉,如果某些括號位於奇怪的地方,我必須調整所有內容才能在代碼塊中獲取它
檢測雙鍵按壓每秒執行60次。 'hi 1'和'hi 2'只是我調試的一部分,可以看到正在執行的內容。 這是一次按下J(鍵代碼74)時執行的操作:
74 hi 1 First press740 hi 2 hi 1 1 DOUBLE PRESS742 hi 2 DONE
起初我認為可能的印刷機沒有被正確清理,但for循環似乎正在起作用。 如果有人知道為什么這不起作用,甚至只是一個更好的方式來做這將是驚人的。
抱歉格式不好,老實說,我無法讓它工作,也沒有找到任何不應該的四重空間。 我希望它不會讓人難以看到或理解。
如果您想要檢測簡單的雙按,則不需要任何陣列或Arraylists。 您只需要真正存儲以前的按鍵。
考慮一下:如果按J然后按K然后J J不再是雙按,那你為什么要關心呢。
為此,您可以使用以下內容:
public class DoubleKeyPressDetection
{
// Below int is the number of milliseconds between the presses to determine
// if it was an intentional double press
// Adjust this for sensitivity required
private static int doublePressSpeed = 500; // Half a second
private static KeyEvent lastKeyEvent;
public static boolean isDoublePress(KeyEvent ke)
{
KeyEvent temp = lastKeyEvent;
lastKeyEvent = ke;
return temp != null
&& temp.getKeyCode() == ke.getKeyCode()
&& ((ke.getWhen() - temp.getWhen()) < doublePressSpeed);
}
}
然后在你的KeyListener
@Override
public void keyPressed(KeyEvent e)
{
if(DoubleKeyPressDetection.isDoublePress(e))
System.out.println("You have double pressed " + KeyEvent.getKeyText(e.getKeyCode()));
}
注意事項:
keyPressed
和keyReleased
方法中,那么它將對每個keyPress和release發布 - 因此無法正常工作 keyTyped
方法,那么這可能不起作用,因為KeyEvent
沒有keyCode
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