设置某些特定跨度配置时,GridPane 自动调整大小存在问题。
以下配置按我的预期工作:
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderStroke;
import javafx.scene.layout.BorderStrokeStyle;
import javafx.scene.layout.BorderWidths;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class GridPaneWidthIssue extends Application {
public static void main(String... arguments) {
launch(arguments);
}
@Override
public void start(Stage primaryStage) throws Exception {
GridPane gridPane = new GridPane();
BorderStroke borderStroke = new BorderStroke(Color.RED,
BorderStrokeStyle.SOLID, CornerRadii.EMPTY,
BorderWidths.DEFAULT);
Border border = new Border(borderStroke);
gridPane.setBorder(border);
gridPane.setGridLinesVisible(true);
gridPane.setHgap(2);
gridPane.setVgap(2);
gridPane.setPadding(new Insets(10));
Label column0 = new Label("Column 0");
Label column1 = new Label("Column 1");
Label column2 = new Label("Column 2");
Label column01 = new Label("Span column 0 and 1");
Label column012 = new Label("Span column 0, 1 and 2");
gridPane.add(column0, 0, 0);
gridPane.add(column1, 1, 0);
gridPane.add(column2, 2, 0);
gridPane.add(column01, 0, 1, 2, 1);
gridPane.add(column012, 0, 2, 3, 1);
Scene scene = new Scene(gridPane);
primaryStage.setScene(scene);
primaryStage.show();
}
}
我还无法发布图像来证明这一点,但我可以验证以下断言:
**gridpane.width = 列0.宽度 + 列1.宽度 + 列2.宽度
当我删除第 0 行中的标签时,我得到以下代码:
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderStroke;
import javafx.scene.layout.BorderStrokeStyle;
import javafx.scene.layout.BorderWidths;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class GridPaneWidthIssue extends Application {
public static void main(String... arguments) {
launch(arguments);
}
@Override
public void start(Stage primaryStage) throws Exception {
GridPane gridPane = new GridPane();
BorderStroke borderStroke = new BorderStroke(Color.RED,
BorderStrokeStyle.SOLID, CornerRadii.EMPTY,
BorderWidths.DEFAULT);
Border border = new Border(borderStroke);
gridPane.setBorder(border);
gridPane.setGridLinesVisible(true);
gridPane.setHgap(2);
gridPane.setVgap(2);
gridPane.setPadding(new Insets(10));
Label column0 = new Label("Column 0");
Label column1 = new Label("Column 1");
Label column2 = new Label("Column 2");
Label column01 = new Label("Span column 0 and 1");
Label column012 = new Label("Span column 0, 1 and 2");
// gridPane.add(column0, 0, 0);
// gridPane.add(column1, 1, 0);
// gridPane.add(column2, 2, 0);
gridPane.add(column01, 0, 1, 2, 1);
gridPane.add(column012, 0, 2, 3, 1);
Scene scene = new Scene(gridPane);
primaryStage.setScene(scene);
primaryStage.show();
}
}
结果不正确:
gridpane.width >栏0.宽度+栏1.宽度+栏2.宽度
我没有验证,但我猜是:
gridpane.width=column0.width+column1.width+column0.width+column1.width+column2.width
JavaFX 问题还是我误解了 Gridpane 大小调整策略?
情况1:好的
情况 2:KO(GridPane 中的空白区域)
最佳答案
您会看到 GridPane 右侧有多余的空间,因为添加 column012
标签时的 colspan 为 3,添加 column01
时的 colspan 为 2标签(并且您不再有三列,而是只有一列)。请记住,GridPane 是一个表,您需要保持其列平衡并使其跨度在其列/行限制内。在您的情况下,空白区域只是 GridPane 内任何标签无法触及的第三列。
更改此:
gridPane.add(column012, 0, 2, 3, 1);
对此:
gridPane.add(column012, 0, 2, 2, 1);
你会看到
理想情况下,如果您计划只有一列,您应该删除该 colspan 和 rowspan 并保留此内容:
gridPane.add(column01, 0, 1);
gridPane.add(column012, 0, 2);
如果保持列平衡,则 GridPane 的宽度将是可预测的,因为它将计算为:插入 + 间隙 + 每列宽度
您可能还想查看 ColumnConstraints类来根据您的喜好自定义每个列的行为。
希望这有帮助!
关于javafx-8 - JavaFX 8 - GridPane 自动调整大小问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28348688/