Question

我试图找到在ListView中选择多个项目的不同方法。 GUI将在触摸屏显示器上运行，因此我无法进行CTRL + Click。通过研究各种过去的帖子，我已经能够通过将所有选定的项目保存在一个数组中然后循环遍历它来获得最终选择来实现多项选择。我的代码唯一的问题是，与CTRL +点击相比，选择顺利进行，因为每次选择新项目时，我的代码都会导致类型闪烁。所以基本上listView清除所有选择，然后选择正确的选择。有没有办法让这种转变顺利进行？是否更容易模仿触摸以获得CTRL +点击效果？

selectedList = new int[totalTypes];//total number of item properties

for(int x=0; x<selectedList.length;x++){//0 = not selected, 1 = selected
    selectedList[x]=0;
}
testView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);

    testView.setOnMouseClicked(new EventHandler<Event>(){
        @Override
        public void handle(Event event){
                if(selectedList[testView.getSelectionModel().getSelectedIndex()]==0){
                    selectedList[testView.getSelectionModel().getSelectedIndex()]=1;
                }
                else{
                    selectedList[testView.getSelectionModel().getSelectedIndex()]=0;
                }

                for(int x=0; x<selectedList.length;x++){
                    if(selectedList[x]==1){
                        testView.getSelectionModel().select(x); 
                    }
                    else{
                        testView.getSelectionModel().clearSelection(x);;
                    }
                }


        }

    });

Answer 1

当用户自己点击ListCell而不是使用标准事件处理时，您可以处理更改选择：

@Override
public void start(Stage primaryStage) {
    ListView<Integer> listView = new ListView<>();
    listView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
    listView.getItems().setAll(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
    listView.addEventFilter(MouseEvent.MOUSE_PRESSED, evt -> {
        Node node = evt.getPickResult().getIntersectedNode();

        // go up from the target node until a list cell is found or it's clear
        // it was not a cell that was clicked
        while (node != null && node != listView && !(node instanceof ListCell)) {
            node = node.getParent();
        }

        // if is part of a cell or the cell,
        // handle event instead of using standard handling
        if (node instanceof ListCell) {
            // prevent further handling
            evt.consume();

            ListCell cell = (ListCell) node;
            ListView lv = cell.getListView();

            // focus the listview
            lv.requestFocus();

            if (!cell.isEmpty()) {
                // handle selection for non-empty cells
                int index = cell.getIndex();
                if (cell.isSelected()) {
                    lv.getSelectionModel().clearSelection(index);
                } else {
                    lv.getSelectionModel().select(index);
                }
            }
        }
    });

    Scene scene = new Scene(listView);

    primaryStage.setScene(scene);
    primaryStage.show();
}

使用Javafx

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