src/camidion/chordhelper/mididevice/ReceiverListView.java

   1 package camidion.chordhelper.mididevice;
   2
   3 import java.awt.Component;
   4 import java.awt.Rectangle;
   5 import java.awt.datatransfer.Transferable;
   6 import java.awt.dnd.DnDConstants;
   7 import java.awt.dnd.DragGestureEvent;
   8 import java.awt.dnd.DragGestureListener;
   9 import java.awt.dnd.DragSource;
  10 import java.awt.dnd.DropTarget;
  11 import java.awt.dnd.DropTargetAdapter;
  12 import java.awt.dnd.DropTargetDragEvent;
  13 import java.awt.dnd.DropTargetDropEvent;
  14 import java.awt.dnd.DropTargetListener;
  15
  16 import javax.sound.midi.Receiver;
  17 import javax.sound.midi.Transmitter;
  18 import javax.swing.JLabel;
  19 import javax.swing.JList;
  20 import javax.swing.ListCellRenderer;
  21 import javax.swing.ListSelectionModel;
  22
  23 /**
  24  * MIDIレシーバ（{@link Receiver}）のリストビューです。
  25  * レシーバをこのビューからドラッグし、
  26  * {@link TransmitterListView} のトランスミッタにドロップして接続できます。
  27  */
  28 public class ReceiverListView extends JList<Receiver> {
  29         /**
  30          * レシーバを描画するクラス
  31          */
  32         private static class CellRenderer extends JLabel implements ListCellRenderer<Receiver> {
  33                 public Component getListCellRendererComponent(JList<? extends Receiver> list,
  34                                 Receiver value, int index, boolean isSelected, boolean cellHasFocus)
  35                 {
  36                         setEnabled(list.isEnabled());
  37                         setFont(list.getFont());
  38                         setOpaque(true);
  39                         if (isSelected) {
  40                                 setBackground(list.getSelectionBackground());
  41                                 setForeground(list.getSelectionForeground());
  42                         } else {
  43                                 setBackground(list.getBackground());
  44                                 setForeground(list.getForeground());
  45                         }
  46                         setIcon(MidiDeviceDialog.MIDI_CONNECTER_ICON);
  47                         setToolTipText("受信端子(Rx)：ドラッグ＆ドロップしてTxに接続できます。");
  48                         return this;
  49                 }
  50         }
  51         /**
  52          * 引数で指定された{@link Receiver}のセル範囲を示す、
  53          * リストの座標系内の境界の矩形を返します。対応するセルがない場合はnullを返します。
  54          * @return セル範囲を示す境界の矩形、またはnull
  55          */
  56         public Rectangle getCellBounds(Receiver rx) {
  57                 int index = getModel().indexOf(rx);
  58                 return getCellBounds(index,index);
  59         }
  60         /**
  61          * このリストによって表示される{@link Receiver}のリストを保持するデータモデルを返します。
  62          * @return 表示される{@link Receiver}のリストを提供するデータモデル
  63          */
  64         @Override
  65         public ReceiverListModel getModel() {
  66                 return (ReceiverListModel) super.getModel();
  67         }
  68         /**
  69          * 仮想MIDI端子リストビューを生成します。
  70          * @param model このビューから参照されるデータモデル
  71          * @param cablePane MIDIケーブル描画面
  72          */
  73         public ReceiverListView(ReceiverListModel model, MidiCablePane cablePane) {
  74                 super(model);
  75                 setCellRenderer(new CellRenderer());
  76                 setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  77                 setLayoutOrientation(JList.HORIZONTAL_WRAP);
  78                 setVisibleRowCount(0);
  79                 //
  80                 // レシーバのドラッグを受け付ける
  81                 DragGestureListener dgl = new DragGestureListener() {
  82                         @Override
  83                         public void dragGestureRecognized(DragGestureEvent event) {
  84                                 if( (event.getDragAction() & DnDConstants.ACTION_COPY_OR_MOVE) == 0 ) return;
  85                                 MidiCablePane.dragging.setData(getModel().getElementAt(locationToIndex(event.getDragOrigin())));
  86                                 event.startDrag(DragSource.DefaultLinkDrop, MidiCablePane.dragging, cablePane.dragSourceListener);
  87                         }
  88                 };
  89                 DragSource dragSource = new DragSource();
  90                 dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, dgl);
  91                 dragSource.addDragSourceMotionListener(cablePane.dragSourceMotionListener);
  92                 //
  93                 // 外からドラッグされたトランスミッタを、ドロップした場所のレシーバに接続する
  94                 DropTargetListener dtl = new DropTargetAdapter() {
  95                         @Override
  96                         public void dragEnter(DropTargetDragEvent event) {
  97                                 if( event.isDataFlavorSupported(DraggingTransceiver.transmitterFlavor) ) {
  98                                         event.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);
  99                                 }
 100                         }
 101                         @Override
 102                         public void drop(DropTargetDropEvent event) {
 103                                 event.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
 104                                 int maskedBits = event.getDropAction() & DnDConstants.ACTION_COPY_OR_MOVE;
 105                                 if( maskedBits == 0 ) {
 106                                         event.dropComplete(false);
 107                                         return;
 108                                 }
 109                                 Transferable t = event.getTransferable();
 110                                 if( ! t.isDataFlavorSupported(DraggingTransceiver.transmitterFlavor) ) {
 111                                         event.dropComplete(false);
 112                                         return;
 113                                 }
 114                                 try {
 115                                         Object tx = t.getTransferData(DraggingTransceiver.transmitterFlavor);
 116                                         if( tx != null ) {
 117                                                 ((Transmitter)tx).setReceiver(getModel().getElementAt(locationToIndex(event.getLocation())));
 118                                                 event.dropComplete(true);
 119                                                 return;
 120                                         }
 121                                 }
 122                                 catch (Exception ex) {
 123                                         ex.printStackTrace();
 124                                 }
 125                                 event.dropComplete(false);
 126                         }
 127                 };
 128                 new DropTarget( this, DnDConstants.ACTION_COPY_OR_MOVE, dtl, true );
 129         }
 130 }