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src/org/herac/tuxguitar/gui/system/keybindings/KeyBindingManager.java

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package org.herac.tuxguitar.gui.system.keybindings;

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import java.io.File;

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import java.util.HashMap;

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import java.util.Map;

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import java.util.Set;

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import org.eclipse.swt.events.KeyEvent;

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import org.eclipse.swt.events.KeyListener;

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import org.eclipse.swt.widgets.Composite;

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import org.herac.tuxguitar.gui.actions.Action;

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import org.herac.tuxguitar.gui.system.keybindings.xml.KeyBindingReader;

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import org.herac.tuxguitar.gui.system.keybindings.xml.KeyBindingWriter;

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import org.herac.tuxguitar.gui.util.TuxGuitarFileUtils;

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public class KeyBindingManager {

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        private static KeyBindingManager instance;

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        private Map keyBindings;

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        private KeyBindingListener kbl;

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        public KeyBindingManager(){ 

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                this.keyBindings = new HashMap();

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        }

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        public void init(){

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                Map userKeyBindings = KeyBindingReader.getKeyBindings(getUserFileName());

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                if(userKeyBindings != null){

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                        this.keyBindings.putAll(userKeyBindings);       

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                }else{

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                        userKeyBindings = KeyBindingDefaults.getDefaultKeyBindings();

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                        this.keyBindings.putAll(userKeyBindings);

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                        this.saveKeyBindings();

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                }

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                this.kbl = new KeyBindingListener();

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        }

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    private String getUserFileName(){

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        return TuxGuitarFileUtils.USER_CONFIG_PREFIX + File.separator + "keybindings.xml";

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    }

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    public Action getActionForKeyBinding(KeyBinding kb){

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        return (Action)keyBindings.get(kb);

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    }

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    public void removeAction(KeyBinding kb){

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        keyBindings.remove(kb);

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    }

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    public void reset(Map keyBindings){

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        this.keyBindings.clear();

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        this.keyBindings.putAll(keyBindings);

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    }

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    public Set getKeyBindings(){

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        return keyBindings.keySet();

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    }

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    public void saveKeyBindings(){

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        KeyBindingWriter.setBindings(getKeyBindings(),getUserFileName());

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    }

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    public void appendListenersTo(Composite c){

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        c.addKeyListener(kbl);

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    }

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    class KeyBindingListener implements KeyListener {

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                public void keyPressed(KeyEvent evt) {

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                        KeyBinding kb = new KeyBinding();

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                        kb.setKey(evt.keyCode);

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                        kb.setMask(evt.stateMask);

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                        Action a = (Action)keyBindings.get(kb);                 

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                        if (a != null){

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                                a.process(evt);                         

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                        }

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                }

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                public void keyReleased(KeyEvent evt) {

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                }

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    }

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}

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