这可能是一个重复的问题,但我还没有找到适合我的需求的解决方案。
受 jewelsea 的 ColorChooserSample 的启发,在我实现过程中,我意识到手动大小只能在 Control
上设置,而不能在 Pane
上设置。这些面板应该足够聪明,可以根据其父级自动调整大小。
GridPane 的子元素是否有一种方式可以同时获取垂直和水平空间?类似于 VBox
和 HBox
的组合。我敢打赌解决方案涉及到 AnchorPane
。
请注意,子元素是 面板 而不是 控件。
具有按钮的 SSCCE(复制 - 粘贴 - 运行 - 调整窗口大小)
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
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.Control;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
/**
*
* @author ggrec
*
*/
public class DashboardFXGrid extends Application
{
// ==================== 1. Static Fields ========================
private final static double GOLDEN_RATIO = 1.618;
private final static double MIN_TILE_SIZE = 5;
private final static double MAX_TILE_SIZE = Double.MAX_VALUE;
// ====================== 2. Instance Fields =============================
private DoubleProperty prefTileSize = new SimpleDoubleProperty(MIN_TILE_SIZE);
private double nColumns;
private double nRows;
private GridPane gridPane;
// ==================== 3. Static Methods ====================
public static void main(final String[] args)
{
Application.launch(args);
}
// ==================== 4. Constructors ====================
@Override
public void start(final Stage primaryStage) throws Exception
{
gridPane = new GridPane();
gridPane.setPadding(new Insets(20));
gridPane.setHgap(10);
gridPane.setVgap(10);
nColumns = Math.floor(Math.sqrt(dummyButtons().length) * 2 / GOLDEN_RATIO);
nRows = Math.ceil(dummyButtons().length / nColumns);
createContents();
addResizeListeners();
primaryStage.setScene(new Scene(gridPane));
primaryStage.show();
}
// ==================== 5. Creators ====================
private void createContents()
{
int i = 0;
for (final Button button : dummyButtons())
{
GridPane.setRowIndex(button, i / (int) nColumns);
GridPane.setColumnIndex(button, i % (int) nColumns);
button.setMinSize(MIN_TILE_SIZE, MIN_TILE_SIZE);
button.setMaxSize(MAX_TILE_SIZE, MAX_TILE_SIZE);
gridPane.getChildren().add(button);
i++;
}
}
private void addResizeListeners()
{
gridPane.layoutBoundsProperty().addListener(new ChangeListener<Bounds>() {
@Override public void changed(final ObservableValue<? extends Bounds> observableValue, final Bounds oldBounds, final Bounds newBounds)
{
prefTileSize.set(Math.max(MIN_TILE_SIZE, Math.min(newBounds.getWidth() / nColumns, newBounds.getHeight() / nRows)));
for (final Node child : gridPane.getChildrenUnmodifiable())
{
final Control tile = (Control) child;
tile.setPrefSize(prefTileSize.get(), prefTileSize.get());
}
}
});
}
// ==================== 15. Other ====================
private static final Button[] dummyButtons()
{
final Button[] buttons = new Button[5];
for(int i = 0; i < buttons.length; i++)
{
buttons[i] = new Button(String.valueOf(i));
}
return buttons;
}
}
Button
(Control
)上运行。那么对于Pane
呢?它们没有setMinSize
和setMaxSize
的 API。 - Georgian