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我真的可以使用一些帮助。JavaFX连接组合框
我正在创建具有两个连接组合框的应用程序,如果我在第一个选择productCode的第二个应该选择productName。
这两个组合框文本框都是为了搜索目的而过滤的。
我已经设置了setCellFactories像这样(用于下拉列表呈现的目的)。
cbSifra.setCellFactory((comboBox) -> new ListCell<Product>() {
@Override
protected void updateItem(Product product, boolean empty) {
super.updateItem(product, empty);
if (product == null || empty) {
setText(null);
} else {
setText(product.getProductCode());
}
}
});
cbNaziv.setCellFactory((comboBox) -> new ListCell<Product>() {
@Override
protected void updateItem(Product product, boolean empty) {
super.updateItem(product, empty);
if (product == null || empty) {
setText(null);
} else {
setText(product.getProductName());
}
}
});
这两个组合框都实现转换器,以便在选择时显示数据到组合框中。
cbNaziv.setConverter(new StringConverter<Product>() {
@Override
public String toString(Product product) {
if (product == null) {
return null;
} else {
return product.productNameProperty().get();
}
}
@Override
public Product fromString(String productString)
{
return cbNaziv.getItems().stream().filter(item->productString.equals(item.getProductName())).findFirst().orElse(null);
}
});
cbSifra.setConverter(new StringConverter<Product>() {
@Override
public String toString(Product product) {
if (product == null) {
return null;
} else {
return product.productCodeProperty().get();
}
}
@Override
public Product fromString(String productString)
{
return cbSifra.getItems().stream().filter(item ->productString.equals(item.getProductCode())).findAny().orElse(null);
}
});
下拉列表中的过滤是使用监听器这样做了textProperty():
cbNaziv.getEditor().textProperty().addListener((obs, oldValue, newValue) -> {
cbNaziv.show();
final TextField editor = cbNaziv.getEditor();
final Product selected = cbNaziv.getSelectionModel().getSelectedItem();
/*
This needs run on the GUI thread to avoid the error described
here: https://bugs.openjdk.java.net/browse/JDK-8081700.
*/
Platform.runLater(() -> {
/*
If the no item in the list is selected or the selected item
isn't equal to the current input, we refilter the list.
*/
if (selected == null || !selected.equals(editor.getText())) {
filteredProductList.setPredicate(item -> {
// We return true for any items that contains the
// same letters as the input. We use toUpperCase to
// avoid case sensitivity.
if (item.getProductName().toUpperCase().contains(newValue.toUpperCase())) {
return true;
} else {
return false;
}
});
}
});
});
cbSifra.getEditor().textProperty().addListener((obs, oldValue, newValue) -> {
cbSifra.show(); // Is used to open dropdown list as i start typing
final TextField editor = cbSifra.getEditor();
final Product selected = cbSifra.getSelectionModel().getSelectedItem();
/*
This needs run on the GUI thread to avoid the error described
here: https://bugs.openjdk.java.net/browse/JDK-8081700.
*/
Platform.runLater(() -> {
/*
If the no item in the list is selected or the selected item
isn't equal to the current input, we refilter the list.
*/
if (selected == null || !selected.equals(editor.getText())) {
filteredProductList.setPredicate(item -> {
// We return true for any items that contains the
// same letters as the input. We use toUpperCase to
// avoid case sensitivity.
if (item.getProductCode().toUpperCase().contains(newValue.toUpperCase())) {
return true;
} else {
return false;
}
});
}
});
});
我valueProperty听众如果选择值来检查并填写一些文本框自己的价值观或设置它们为空。
cbSifra.valueProperty().addListener(new ChangeListener<Product>() {
@Override
public void changed(ObservableValue<? extends Product> observable, Product oldValue, Product newValue) {
if (cbSifra.getValue() == null || cbSifra.getValue().getProductName().isEmpty())
{
cbNaziv.getSelectionModel().clearSelection();
tfMpCijena.setText(null);
tfPopust.setText(null);
} else {
cbNaziv.setValue(cbSifra.getValue());
cbSifra.setValue(cbNaziv.getValue());
cbNaziv.hide();
tfMpCijena.setText(cbSifra.getValue().getProductRetailPrice().toString());
tfPopust.setText("0");
}
}
});
cbNaziv.valueProperty().addListener(new ChangeListener<Product>() {
@Override
public void changed(ObservableValue<? extends Product> observable, Product oldValue, Product newValue) {
if (cbNaziv.getValue() == null || cbNaziv.getValue().getProductName().isEmpty())
{
cbSifra.getSelectionModel().clearSelection();
tfMpCijena.setText(null);
tfPopust.setText(null);
} else {
cbSifra.setValue(cbNaziv.getValue());
cbSifra.hide();
tfMpCijena.setText(cbNaziv.getValue().getProductRetailPrice().toString());
tfPopust.setText("0");
}
}
});
的问题是:
当我开始打字东西放到它过滤确定任何组合框和 当我从下拉式列表项填满第二组合框,但 第一组合框编辑重点再次得到并显示下拉 再次
当我从combobox删除条目它删除确定,但其他 组合框值rem (它没有删除)
如果你能帮助我,我会非常感激。 在此先感谢。