如何解决javafx中codearea的自动补全
在 javafx 中键入自动完成时,如何在 codearea 中的当前插入符号位置创建列表视图?到目前为止,我找到了当前正在键入的单词,并查看该单词是否包含在数组中。这是我到目前为止的代码。提前致谢!
String[] keyphrases = new String[]{"int main(){\n}","cout","cin"};
((CodeArea)tabPane.getSelectionModel().getSelectedItem().getContent()).textproperty().addListener(new changelistener<String>()
{
@Override
public void changed(ObservableValue<? extends String> observableValue,String s,String s2) {
CodeArea sto = ((CodeArea)tabPane.getSelectionModel().getSelectedItem().getContent());
String curr = "";
String currFinal = "";
for (int i = sto.getAnchor(); i > 0; i--) {
if (sto.getText().charat(i) == '\n' || sto.getText().charat(i) == ' ') {
break;
}else {
curr += sto.getText().charat(i);
}
}
for (int i = curr.length()-1; i >= 0; i--) {
currFinal += curr.charat(i);
}
System.out.println(currFinal);
ArrayList<String> fil = new ArrayList<String>();
for (int i = 0; i < keyphrases.length; i++) {
if (keyphrases[i].contains(currFinal)) {
fil.add(keyphrases[i]);
}
}
//display fil as listview in caret position?
}
});
解决方法
如果您询问如何在插入符号位置显示 ListView,请查看以下方法。这是在当前插入符号位置显示 ListView 的通用高级方法。您可以根据自己的要求关联逻辑和更改。
我相信这将为您提供有关如何接近的必要基础知识。话虽如此,还有许多其他更好的方法。
核心思想是依靠插入符节点(Path)的边界,而不是做复杂的计算来找到插入符在文本中的位置。
import javafx.application.Application;
import javafx.geometry.Bounds;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.TextArea;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.layout.VBox;
import javafx.scene.shape.Path;
import javafx.stage.Popup;
import javafx.stage.Stage;
public class TextAreaCaretPositionDemo extends Application {
private Bounds caretBoundsInScreen;
private Node caret;
@Override
public void start(Stage stage) throws Exception {
final VBox root = new VBox();
root.setSpacing(10);
root.setPadding(new Insets(10));
final Scene sc = new Scene(root,350,200);
stage.setScene(sc);
stage.setTitle("TextArea Caret Position");
stage.show();
TextArea textArea = new TextArea() {
@Override
protected void layoutChildren() {
super.layoutChildren();
if (caret == null) {
final Region content = (Region) lookup(".content");
// Looking for the caret path node and add a listener to its bounds to keep track of its position in screen.
content.getChildrenUnmodifiable().stream()
.filter(node -> node instanceof Path)
.map(node -> (Path) node)
// Find a more better way to find the caret path node
.filter(path -> path.getStrokeWidth() == 1 && path.fillProperty().isBound() && path.strokeProperty().isBound())
.findFirst().ifPresent(path -> {
path.boundsInLocalProperty().addListener((obs,old,bounds) -> {
if (bounds.getWidth() > 0 && bounds.getHeight() > 0) {
caretBoundsInScreen = path.localToScreen(bounds);
}
});
caret = path;
});
}
}
};
textArea.setWrapText(true);
VBox.setVgrow(textArea,Priority.ALWAYS);
ListView<String> list = new ListView<>();
list.setPrefSize(150,200);
list.getItems().addAll("One","Two","Three");
Popup popup = new Popup();
popup.setAutoHide(true);
popup.getContent().addAll(list);
Button show = new Button("Show ListView");
show.setOnAction(e->{
popup.show(caret,caretBoundsInScreen.getMinX(),caretBoundsInScreen.getMaxY());
});
root.getChildren().addAll(show,textArea);
textArea.setText("Lorem ipsum dolor sit amet,consectetur adipiscing elit,sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");
}
}
,
使用 Sai 的回答,我创建了自己的解决方案!
{ ? : }
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。