在Java中修改Office 2007的缩放栏(修改后的JSLIDER)

我正在尝试模仿(或找到一个以前存在的组件)Word 2007中的缩放滑块:

Two state zoom bar http://i49.tinypic.com/iyk65l.png

这个组件和标准JavaJSLIDER有两个主要区别:

1. 除了100%外,不会捕捉到滴答声,当您滑动条而不是释放鼠标时会捕捉到滴答声。
2. 滑块在整个过程中不是线性的:滑块的左半部分从10%到100%;右侧从100%到500%。

以下是迄今为止我所拥有的: Java clone http://i45.tinypic.com/2i8dms9.png

来源:

    import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 *
 * @author NDUNN
 * @date Nov 25, 2009
 */
public class ZoomBar extends JPanel implements ActionListener, ChangeListener {

    private JLabel zoomAmount;
    private JButton minus;
    private JButton plus;
    private JSlider slider;

    private static final int MIN_ZOOM = 10;
    private static final int MAX_ZOOM = 200;
    private static final int DEFAULT_ZOOM = 100;

    private static final int MAJOR_ZOOM_SPACING = 50;
    private static final int MINOR_ZOOM_SPACING = 10;

    public ZoomBar() {
        super();

        minus = new JButton("-");
        plus = new JButton("+");
        slider = new JSlider(MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM);

        slider.setMinorTickSpacing(MINOR_ZOOM_SPACING);
        slider.setMajorTickSpacing(MAJOR_ZOOM_SPACING);
        slider.setPaintTicks(true);
        slider.setSnapToTicks(true);

        zoomAmount = new JLabel(slider.getValue() + "%");

        add(zoomAmount);
        add(minus);
        add(slider);
        add(plus);

        plus.addActionListener(this);
        minus.addActionListener(this);

        slider.addChangeListener(this);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Zoom bar clone");
        frame.setContentPane(new ZoomBar());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == plus) {
            slider.setValue(slider.getValue() + MINOR_ZOOM_SPACING);
        }
        else if (e.getSource() == minus) {
            slider.setValue(slider.getValue() - MINOR_ZOOM_SPACING);
        }
    }

    public void stateChanged(ChangeEvent e) {
        if (slider.getValueIsAdjusting()) {
            return;
        }
        zoomAmount.setText(slider.getValue() + "%");
    }

}

基本上只是模仿外观,但没有上述两个功能。我什么都没看到 JSlider API 这让我有了这种行为。我必须从头开始才能有这种行为吗?如果是这样的话,这不值得我花时间,但是如果有人知道一个好的方法来达到这种行为,我想在我正在进行的项目中拥有它会很好。

谢谢,

尼克

编辑:

多亏了pspeed提出了将0..50和50..100映射到不同值的想法。这样做的代码如下。

不幸的是,将setvalue更改为snap的想法没有起作用。

public void stateChanged(ChangeEvent e) {
    // While slider is moving, snap it to midpoint
    int value = slider.getValue();
    if (slider.getValueIsAdjusting()) {
        return;
    }

    zoomValue = fromSlider(value);
    zoomLabel.setText(zoomValue + "%");
}

public int fromSlider(int sliderValue) {
    int mappedValue = 0;
    if (sliderValue <= 50) {
        // Map from [0, 50] to [MIN ... DEFAULT]
        mappedValue = (int) map(sliderValue, 0, 50, MIN_ZOOM, DEFAULT_ZOOM);
    }
    else {
        // Convert from  (50, 100] to (DEFAULT ... MAX]
        mappedValue = (int) map(sliderValue, 50, 100, DEFAULT_ZOOM, MAX_ZOOM);
    }
    return mappedValue;
}

public int toSlider(int modelValue) {
    int mappedValue = 0;
    if (modelValue <= DEFAULT_ZOOM) {
        // Map from [MIN_ZOOM, DEFAULT_ZOOM] to [0 ... 50]
        mappedValue = (int) map(modelValue, MIN_ZOOM, DEFAULT_ZOOM, 0, 50);
    }
    else {
        // Convert from  (DEFAULT ... MAX] to (50, 100]
        mappedValue = (int) map(modelValue, DEFAULT_ZOOM, MAX_ZOOM, 50, 100);
    }
    return mappedValue;
}


/**
 * @param value The incoming value to be converted
 * @param low1  Lower bound of the value's current range
 * @param high1 Upper bound of the value's current range
 * @param low2  Lower bound of the value's target range
 * @param high2 Upper bound of the value's target range
 * @return
 */
public static final double map(double value, double low1, double high1, double low2, double high2) {

    double diff = value - low1;
    double proportion = diff / (high1 - low1);

    return lerp(low2, high2, proportion);
}

public static final double lerp(double value1, double value2, double amt) {
    return ((value2 - value1) * amt) + value1;
}

编辑2: 我注意到的另一个不同点是jbutton不允许您多次按住它来启动按钮,而office中的+/-按钮可以。知道怎么模仿这个吗?