JavaFX |带示例的光标类
原文:https://www . geesforgeks . org/JavaFX-cursor-class-with-examples/
游标类是 JavaFX 的一部分。Cursor 类用于封装鼠标光标的位图表示。游标类有几个预定义的游标，可以根据程序员的需要使用。
常用方法:
| 方法 | 说明 |
|---|---|
| 光标(字符串) | 返回指定字符串的光标对象 |
| toString() | 返回光标的字符串表示形式。 |
下面的程序将说明游标类的使用:
-
Java program to set some predefined cursor to the by passing string identifier as arguments: This program creates a Cursor named cursor_. The cursor will be set to the scene using the function setCursor().we will create a label. The label will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a tile pane is created, on which addChildren() method is called to attach the label inside the scene. Finally, the show() method is called to display the final results.
```java // Java program to set some predefined cursor // to the by passing string identifier as arguments import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.*; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.control.Label; import javafx.stage.Stage; import javafx.scene.Cursor;
public class cursor_0 extends Application {
// launch the application public void start(Stage stage) {
// set title for the stage stage.setTitle("Creating Cursor");
// create a stack pane TilePane tilepane = new TilePane();
// create a label Label label = new Label("Cursor Example");
// add button tilepane.getChildren().add(label);
// create a scene Scene scene = new Scene(tilepane, 200, 200);
// create a cursor Cursor cursor_ = Cursor.cursor("WAIT");
// set cursor for the scene scene.setCursor(cursor_);
// set the scene stage.setScene(scene);
stage.show(); }
// Main Method public static void main(String args[]) {
// launch the application launch(args); } } ```
输出:
https://media.geeksforgeeks.org/wp-content/uploads/Cursor_1.mp4 2. Java program to set some predefined cursor to the scene: This program creates a Button indicated by the name button respectively. We will create an array of predefined cursors named cursor_. The cursor will be set to the scene using the function setCursor() from the list of predefined cursor cursor_. The button will be created inside a scene, which in turn will be hosted inside a stage. We would create a label. The function setTitle() is used to provide title to the stage. Then a tile pane is created, on which addChildren() method is called to attach the button and label inside the scene. Finally, the show() method is called to display the final results.we would create an event handler to handle the button events. The event handler would be added to the button using setOnAction() function. When the button will be pressed the cursor of the scene will be changed by using the function setCursor().
```java // Java program to set some predefined // cursor to the scene import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.*; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.control.Label; import javafx.stage.Stage; import javafx.scene.Cursor;
public class cursor_1 extends Application {
// counter of cursor int i = 0;
// launch the application public void start(Stage stage) { // set title for the stage stage.setTitle("Creating Cursor");
// create a button Button button = new Button("cursor");
// create a stack pane TilePane tilepane = new TilePane();
// create a label Label label = new Label("Cursor Example");
// create a cursor with predefined cursor Cursor cursor_[] = {Cursor.CLOSED_HAND, Cursor.CROSSHAIR, Cursor.DEFAULT, Cursor.DISAPPEAR, Cursor.E_RESIZE, Cursor.H_RESIZE, Cursor.HAND, Cursor.MOVE, Cursor.N_RESIZE, Cursor.NE_RESIZE, Cursor.NONE, Cursor.NW_RESIZE, Cursor.OPEN_HAND, Cursor.SE_RESIZE, Cursor.SW_RESIZE, Cursor.TEXT, Cursor.V_RESIZE, Cursor.W_RESIZE, Cursor.WAIT};
// add button tilepane.getChildren().add(button); tilepane.getChildren().add(label);
// create a scene Scene scene = new Scene(tilepane, 200, 200);
// set cursor for the scene scene.setCursor(cursor_[0]);
// action event EventHandler event = new EventHandler() { public void handle(ActionEvent e) { if (i == cursor_.length - 1) i = -1;
// change the cursor scene.setCursor(cursor_[++i]); } };
// when button is pressed button.setOnAction(event);
// set the scene stage.setScene(scene);
stage.show(); }
// Main Method public static void main(String args[]) {
// launch the application launch(args); } } ```
输出:
https://media.geeksforgeeks.org/wp-content/uploads/Cursor_1.mp4
注意:上述程序可能无法在在线 IDE 中运行。请使用离线编译器。
参考:
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