我正在尝试创建一个在用户单击特定单元格时切换/取消切换的gridpane。例如，当用户单击内容为“*”的单元格时，我希望将该特定单元格的内容更改为空白单元格“”。类似地，如果用户单击内容为空白的单元格“”，我希望将该单元格的内容更改为内容为“*”的单元格。
基本上，我从一个部分输入的网格开始，如下所示：
我的格子最初输入如下，我正在跟踪一个布尔矩阵，它代表矩阵的一个单元格中是否应该有一个“*”。如果格子的单元格[i， j]中有一个“*”，那么矩阵[i，j]的值应该是true，否则应该是false。
boolean matrix[][] = new boolean[StateList.size()+1][RequirementList.size()+1];
for( InstanceArtifact li: ListOfLinks) {
int y=1;
for(InstanceArtifact re: RequirementList) {
int x=1;
for(InstanceArtifact state: StateList) {
if(li.getPropertyValue("linksource").equals(re) && li.getPropertyValue("linktarget").equals(state)) {
link= new Label(" * ");
//tick in cell (1,1)
grid.add(link, y, x);
matrix[x][y]= true;
}
else {
link= new Label(" ");
//tick in cell (1,1)
grid.add(link, y, x);
}
x++;
}
y++;
}
}
}
我想做的是切换/取消切换星星，这是我试图用下面的代码做的，当我们点击一个包含“*”的单元格，意思是矩阵[i][j]=true时，我正在删除网格中相应的标签，并添加一个带有空文本的新标签。我也在相反的情况下做同样的事情，其中标签文本是空白的，我需要用包含星星的标签替换它。
grid.getChildren().forEach(element -> {
element.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
int matrixX= GridPane.getRowIndex(element);
int matrixY= GridPane.getColumnIndex(element);
if(element!=null && matrixX!=0 && matrixY!=0) {
System.out.println("matrixX: "+matrixX+" matrixY: "+matrixY);
System.out.println("matrixY: "+matrixY+" "+ matrix[matrixX][matrixY]);
if(matrix[matrixX][matrixY]==true && matrixX!=0 && matrixY!=0) {
System.out.println("HEY I AM HERE FIRSTTTTTTTTT");
Node newnode= new Label(" ");
GridPane.clearConstraints(element);
// grid.getChildren().remove(element);
grid.add(newnode, matrixY, matrixX);
matrix[matrixX][matrixY]=false;
/*for(int l=0; l<RequirementList.size(); l++) {
for(int p=0; p<StateList.size(); p++) {
System.out.println(l + " "+p +" "+matrix[l][p]);
}
}*/
//grid.add(mynode, matrixY+1, matrixX+1, 1, 1);
}
else if(matrix[matrixX][matrixY]==false && matrixX!=0 && matrixY!=0){
System.out.println("HEY I AM HERE SECONDDDDDDD ");
/* for(int l=0; l<RequirementList.size(); l++) {
for(int p=0; p<StateList.size(); p++) {
System.out.println(l + " "+p +" "+matrix[l][p]);
}
}*/
Node falsenode= new Label(" * ");
GridPane.clearConstraints(element);
// grid.getChildren().remove(element);
grid.add(falsenode, matrixY, matrixX);
matrix[matrixX][matrixY]=true;
}
// System.out.println("Row: " + GridPane.getRowIndex(element));
// System.out.println("Column: " + GridPane.getColumnIndex(element));
}
}
});
});
我的代码没有按预期运行，我希望每当用户单击单元格时单元格被切换/取消切换，代码仅在用户第一次单击给定单元格时执行，如果用户多次单击同一单元格（不止一次），则什么都不会发生。
此外，我尝试删除标签的代码行不起作用：
grid.getChildren().remove(element);
这可以通过切换按钮更好地服务。代码中的注释。
import java.util.ArrayList;
import java.util.List;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
/**
*
* @author Sedrick
*/
public class JavaFXApplication60 extends Application {
@Override
public void start(Stage primaryStage) {
//Start create GUI
Label lblRequirement11 = new Label("Requirement1");
Label lblRequirement12 = new Label("Requirement2");
Label lblRequirement13 = new Label("Requirement3");
GridPane.setConstraints(lblRequirement11, 1, 0);
GridPane.setConstraints(lblRequirement12, 2, 0);
GridPane.setConstraints(lblRequirement13, 3, 0);
Label lblState1 = new Label("State1");
ToggleButton toggleButton11 = new ToggleButton();
toggleButton11.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton12 = new ToggleButton();
toggleButton12.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton13 = new ToggleButton();
toggleButton13.setMaxWidth(Double.MAX_VALUE);
GridPane.setConstraints(lblState1, 0, 1);
GridPane.setConstraints(toggleButton11, 1, 1);
GridPane.setConstraints(toggleButton12, 2, 1);
GridPane.setConstraints(toggleButton13, 3, 1);
Label lblState2 = new Label("State2");
ToggleButton toggleButton21 = new ToggleButton();
toggleButton21.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton22 = new ToggleButton();
toggleButton22.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton23 = new ToggleButton();
toggleButton23.setMaxWidth(Double.MAX_VALUE);
GridPane.setConstraints(lblState2, 0, 2);
GridPane.setConstraints(toggleButton21, 1, 2);
GridPane.setConstraints(toggleButton22, 2, 2);
GridPane.setConstraints(toggleButton23, 3, 2);
Label lblState3 = new Label("State3");
ToggleButton toggleButton31 = new ToggleButton();
toggleButton31.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton32 = new ToggleButton();
toggleButton32.setMaxWidth(Double.MAX_VALUE);
ToggleButton toggleButton33 = new ToggleButton();
toggleButton33.setMaxWidth(Double.MAX_VALUE);
GridPane.setConstraints(lblState3, 0, 3);
GridPane.setConstraints(toggleButton31, 1, 3);
GridPane.setConstraints(toggleButton32, 2, 3);
GridPane.setConstraints(toggleButton33, 3, 3);
GridPane root = new GridPane();
root.setVgap(5);
root.setHgap(5);
root.getChildren().addAll(lblRequirement11, lblRequirement12, lblRequirement13);
root.getChildren().addAll(lblState1, toggleButton11, toggleButton12, toggleButton13);
root.getChildren().addAll(lblState2, toggleButton21, toggleButton22, toggleButton23);
root.getChildren().addAll(lblState3, toggleButton31, toggleButton32, toggleButton33);
//End create GUI
//Start create ToggleButtons' event handlers.
List<ToggleButton> toggleButtonList = new ArrayList();
toggleButtonList.add(toggleButton11);
toggleButtonList.add(toggleButton12);
toggleButtonList.add(toggleButton13);
toggleButtonList.add(toggleButton21);
toggleButtonList.add(toggleButton22);
toggleButtonList.add(toggleButton23);
toggleButtonList.add(toggleButton31);
toggleButtonList.add(toggleButton32);
toggleButtonList.add(toggleButton33);
for(ToggleButton tempToggleButton : toggleButtonList)
{
tempToggleButton.setOnAction(actionEvent -> {
if(tempToggleButton.isSelected())
{
tempToggleButton.setText("*");
}
else
{
tempToggleButton.setText("");
}
});
}
////End create ToggleButtons' event handlers.
Scene scene = new Scene(root, 400, 300);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
