| 29 | |
| 30 | |
| 31 | class ListWidget(QListWidget): |
| 32 | |
| 33 | def __init__(self, *args, **kwargs): |
| 34 | super(ListWidget, self).__init__(*args, **kwargs) |
| 35 | self.setDragEnabled(True) |
| 36 | self.setDragDropMode(QListWidget.DragOnly) |
| 37 | self.setDefaultDropAction(Qt.IgnoreAction) |
| 38 | self.setEditTriggers(QListWidget.NoEditTriggers) |
| 39 | self.setResizeMode(QListWidget.Adjust) |
| 40 | self.setViewMode(QListWidget.IconMode) |
| 41 | |
| 42 | def startDrag(self, supportedActions): |
| 43 | items = self.selectedItems() |
| 44 | if not items: |
| 45 | return |
| 46 | # 这里就简单的根据名字提示来传递数据了，实际上可以传递任意数据 |
| 47 | data = QMimeData() |
| 48 | data.setData('application/node-items', |
| 49 | json.dumps([item.toolTip() for item in items]).encode()) |
| 50 | # 这里简单显示第一个缩略图 |
| 51 | pixmap = items[0].icon().pixmap(36, 36) |
| 52 | drag = QDrag(self) |
| 53 | drag.setMimeData(data) |
| 54 | drag.setPixmap(pixmap) |
| 55 | drag.setHotSpot(pixmap.rect().center()) |
| 56 | drag.exec_(supportedActions) |
| 57 | |
| 58 | |
| 59 | class GraphicsView(QGraphicsView): |