我试图用Javafx制作屏幕键盘进行布局。我使用Scene Builder制作FXML文件。
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<?import javafx.scene.text.*?>
<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="186.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2">
<children>
<VBox layoutX="0.0" layoutY="0.0" prefHeight="186.0" prefWidth="600.0" rotate="0.0" spacing="2.0">
<children>
<HBox minHeight="33.0" prefHeight="33.0" prefWidth="600.0" spacing="2.0">
<children>
<Label maxWidth="-Infinity" prefHeight="33.0" prefWidth="35.0" text="Milk" textAlignment="CENTER" />
<Label maxWidth="-Infinity" prefHeight="33.0" text="Mister" />
<Label maxWidth="-Infinity" prefHeight="35.0" text="Minimum" />
</children>
<padding>
<Insets left="5.0" />
</padding>
</HBox>
<HBox prefHeight="29.0" prefWidth="600.0">
<children>
<Button minWidth="29.0" mnemonicParsing="false" prefHeight="27.0" prefWidth="29.0" text="Esc" textAlignment="CENTER" underline="false">
<font>
<Font size="9.0" />
</font>
</Button>
<Button mnemonicParsing="false" text="`" textAlignment="CENTER" />
<Button mnemonicParsing="false" text="1" />
<Button mnemonicParsing="false" text="2" />
<Button mnemonicParsing="false" text="3" />
<Button mnemonicParsing="false" text="4" />
<Button mnemonicParsing="false" text="5" />
<Button mnemonicParsing="false" text="6" />
<Button mnemonicParsing="false" text="7" />
<Button mnemonicParsing="false" text="9" />
<Button mnemonicParsing="false" text="0" />
<Button mnemonicParsing="false" text="-" />
<Button mnemonicParsing="false" text="=" />
<Button mnemonicParsing="false" text="Backspace" />
</children>
</HBox>
<HBox prefHeight="57.0" prefWidth="600.0">
<children>
<VBox minHeight="50.0" prefHeight="78.0" prefWidth="505.0" HBox.hgrow="ALWAYS">
<children>
<HBox prefHeight="29.0" prefWidth="-1.0">
<children>
<Button mnemonicParsing="false" prefHeight="27.0" text="Tab" />
<Button mnemonicParsing="false" text="q" />
<Button mnemonicParsing="false" text="w" />
<Button mnemonicParsing="false" text="e" />
<Button mnemonicParsing="false" text="r" />
<Button mnemonicParsing="false" text="t" />
<Button mnemonicParsing="false" text="y" />
<Button mnemonicParsing="false" text="u" />
<Button mnemonicParsing="false" text="i" />
<Button mnemonicParsing="false" text="o" />
<Button mnemonicParsing="false" text="p" />
<Button mnemonicParsing="false" text="[" />
<Button mnemonicParsing="false" text="]" />
</children>
</HBox>
<HBox minHeight="-1.0" prefHeight="28.0" prefWidth="-1.0">
<children>
<Button mnemonicParsing="false" prefWidth="71.0" text="Caps" />
<Button mnemonicParsing="false" text="a" />
<Button mnemonicParsing="false" text="s" />
<Button mnemonicParsing="false" text="d" />
<Button mnemonicParsing="false" text="f" />
<Button mnemonicParsing="false" text="g" />
<Button mnemonicParsing="false" text="h" />
<Button mnemonicParsing="false" text="j" />
<Button mnemonicParsing="false" text="k" />
<Button mnemonicParsing="false" text="l" />
<Button mnemonicParsing="false" text=";" />
<Button mnemonicParsing="false" text="'" />
<Button mnemonicParsing="false" text="\\" />
</children>
</HBox>
</children>
</VBox>
<Button mnemonicParsing="false" prefHeight="57.0" prefWidth="132.0" text="Enter" />
</children>
</HBox>
<HBox prefHeight="27.000099999997474" prefWidth="600.0">
<children>
<Button mnemonicParsing="false" prefWidth="85.0" text="Shift" />
<Button mnemonicParsing="false" text="z" />
<Button mnemonicParsing="false" text="x" />
<Button mnemonicParsing="false" text="c" />
<Button mnemonicParsing="false" text="v" />
<Button mnemonicParsing="false" text="b" />
<Button mnemonicParsing="false" text="n" />
<Button mnemonicParsing="false" text="m" />
<Button mnemonicParsing="false" text="," />
<Button mnemonicParsing="false" text="." />
<Button mnemonicParsing="false" text="/" />
<Button mnemonicParsing="false" text="^" />
<Button mnemonicParsing="false" prefWidth="56.0" text="Shift" />
<Button mnemonicParsing="false" text="Del" />
</children>
</HBox>
<HBox prefHeight="29.0" prefWidth="600.0" VBox.vgrow="ALWAYS">
<children>
<Button mnemonicParsing="false" text="Fn" />
<Button mnemonicParsing="false" text="Ctrl">
<HBox.margin>
<Insets />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" text="Win" />
<Button mnemonicParsing="false" text="Alt" />
<Button mnemonicParsing="false" prefWidth="105.0" text="Space" HBox.hgrow="ALWAYS" />
<Button mnemonicParsing="false" text="Alt" />
<Button mnemonicParsing="false" prefWidth="-1.0" text="Ctrl" textAlignment="LEFT" />
<Button mnemonicParsing="false" text="<" />
<Button mnemonicParsing="false" text="v" />
<Button mnemonicParsing="false" text=">" />
<Button mnemonicParsing="false" text="Menu" />
</children>
</HBox>
</children>
</VBox>
</children>
</AnchorPane>
看起来像这样:
但是当调整窗口大小时,内容不会被删除。我希望按钮增大/减小尺寸,直到它适合窗口。打开Hgrow和Vgrow没有用。
我无法找到如何在按钮上设置填充。我想在不丢失文本的情况下制作像Ctrl这样的按钮。
答案 0 :(得分:22)
根据字体大小调整大小
对于您的特定情况,请尝试调整用于虚拟键盘的父布局容器的字体大小(-fx-font-size
),而不是尝试使用填充或其他布局约束来调整按钮大小。如果您将字体大小设置得更大,按钮将自动更改其首选大小以匹配此较大的大小,并且所有文本将自动呈现并适合首选大小,并显示在该字体大小的建议填充布局中(这可能是你想要的。)
按钮调整规则
基本上可以调整按钮大小的规则是:
button.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE)
中删除maxSize约束。这是必需的,因为按钮的默认约束是其最大大小是其首选大小,因此它不会自动增长以填充可用空间。-fx-padding
或在代码中使用button.setPadding(new Insets(...))
。为了更好地理解JavaFX中的布局管理,我建议您查看过去的JavaOne Interface Layout with JavaFX 2.0 presentation。
可调整大小的按钮网格示例
如果您希望继续尝试创建自己的实现,sample color chooser可能会有所帮助。颜色选择实现基于可调整大小的可调整按钮网格,因此当您更改可用于颜色选择器网格的区域时,网格和网格中的按钮都会展开或收缩。颜色选择器的代码不是基于FXML的,也不是直接实现你想要的键盘,但它确实展示了你在问题中询问的按钮的自动调整大小。
考虑使用JavaFX虚拟键盘
JavaFX已经有built-in virtual keyboard。 内置键盘没有官方支持和记录的公共API,并且不保证在Java版本之间维护。但是,使用内置虚拟键盘可能仍然会更好方法而不是试图创建自己的方法。创建高质量的通用虚拟键盘是一项非常艰巨的任务(IMO)。
Oracle JavaFX forums上就此主题进行了一些讨论。
JavaFX是开源的,因此即使您不直接使用内置虚拟键盘,也可以查看JavaFX source以了解如何实施。
示例虚拟键盘代码
示例代码演示在桌面上使用内置JavaFX虚拟键盘&#34;环境。
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class EmbeddedSample extends Application {
@Override public void start(Stage stage) {
stage.setScene(new Scene(new StackPane(new TextField("xyzzy")), 200, 100));
stage.getScene().setOnMouseClicked(e -> stage.hide());
stage.show();
}
public static void main(String[] args) { launch(args); }
}
运行如下示例代码:
java -Dcom.sun.javafx.virtualKeyboard=javafx -Dcom.sun.javafx.touch=true EmbeddedSample
基于字体大小调整大小的虚拟键盘示例代码
keyboard.css
.key {
-fx-base: antiquewhite;
}
.key-row {
-fx-spacing: 0.333333em;
}
.keyboard {
-fx-spacing: 0.333333em;
-fx-padding: 0.333333em;
-fx-font-family: monospace;
}
ResizableKeyboardSample.java
import javafx.application.Application;
import javafx.beans.property.*;
import javafx.geometry.*;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.scene.text.Font;
import javafx.stage.Stage;
public class ResizableKeyboardSample extends Application {
public static void main(String[] args) throws Exception {
launch(args);
}
String[] chars = {
"qwertyuiop",
"asdfghjkl",
"zxcvbnm"
};
public void start(final Stage stage) throws Exception {
Keyboard keyboard = new Keyboard();
VBox layout = new VBox(20);
layout.setPadding(new Insets(10));
layout.getChildren().setAll(
createControls(keyboard),
keyboard
);
Scene scene = new Scene(layout, 1000, 400);
scene.getStylesheets().add(
getClass().getResource(
"keyboard.css"
).toExternalForm()
);
stage.setScene(scene);
stage.show();
}
private Node createControls(Keyboard keyboard) {
Slider fontSize = new Slider(8, 40, Font.getDefault().getSize());
keyboard.fontSizeProperty().bind(fontSize.valueProperty());
fontSize.setShowTickLabels(true);
fontSize.setShowTickMarks(true);
fontSize.setMajorTickUnit(2);
fontSize.setMinorTickCount(0);
Label typedData = new Label();
keyboard.lastKeyTextProperty().addListener((observable, oldText, newText) ->
typedData.setText(typedData.getText() + newText)
);
VBox layout = new VBox(10);
layout.getChildren().setAll(
new Label("Keyboard Size"),
fontSize,
typedData
);
layout.setMinSize(VBox.USE_PREF_SIZE, VBox.USE_PREF_SIZE);
return layout;
}
class Keyboard extends VBox {
private DoubleProperty fontSize = new SimpleDoubleProperty(Font.getDefault().getSize());
public double getFontSize() {
return fontSize.get();
}
public DoubleProperty fontSizeProperty() {
return fontSize;
}
public void setFontSize(double fontSize) {
this.fontSize.set(fontSize);
}
private ReadOnlyStringWrapper lastKeyText = new ReadOnlyStringWrapper();
public String getLastKeyText() {
return lastKeyText.get();
}
public ReadOnlyStringProperty lastKeyTextProperty() {
return lastKeyText.getReadOnlyProperty();
}
public Keyboard() {
setAlignment(Pos.BOTTOM_CENTER);
setMinSize(VBox.USE_PREF_SIZE, VBox.USE_PREF_SIZE);
getStyleClass().add("keyboard");
onFontSizeChange(fontSize.getValue());
fontSize.addListener((observable, oldValue, newValue) ->
onFontSizeChange(newValue)
);
for (String row: chars) {
HBox keyRow = new HBox();
keyRow.getStyleClass().add("key-row");
keyRow.setAlignment(Pos.CENTER);
for (char c: row.toCharArray()) {
KeyButton key = new KeyButton(Character.toString(c));
keyRow.getChildren().add(key);
}
getChildren().add(keyRow);
}
}
private void onFontSizeChange(Number newValue) {
setStyle("-fx-font-size: " + newValue + "px;");
}
class KeyButton extends Button {
public KeyButton(String text) {
super(text);
getStyleClass().add("key");
setMinSize(Button.USE_PREF_SIZE, Button.USE_PREF_SIZE);
setMaxSize(Button.USE_PREF_SIZE, Button.USE_PREF_SIZE);
setOnAction(event -> lastKeyText.set(text));
}
}
}
}