JScrollPane getX() 返回错误值？

发布于 2024-12-06 01:20:54 字数 306 浏览 0 评论 0原文

我希望在按钮上方放置一个小 Jframe，在 ActionPerformed 上

我直接尝试获取添加按钮的 JScrollPane 的 X (getX()) 和 Y(getY()) 坐标，但它似乎总是错误坐标

返回jScrollPane1.getLocation() 返回的

java.awt.Point[x=10,y=170]

值上述值与我将 JScrollPane 放置在屏幕上的位置无关。

如果我删除 JScrollPane 并直接尝试获取 Jpanels 坐标，这将有效！

原文

I wish to place a small Jframe right above the Button, on ActionPerformed

I directly tried to get the X (getX()) and Y(getY()) co-ordinates of the JScrollPane in which the button is added, but it always seems to return wrong co-coordinates

values returned by jScrollPane1.getLocation()

java.awt.Point[x=10,y=170]

The above values are same independent on where I place the JScrollPane on the screen.

This works if I remove the JScrollPane and directly try to get the Jpanels co-ordinates!!

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雅心素梦 2024-12-13 01:20:54

例如

private void showDialog() {
    if (canShow) {
        location = myButton.getLocationOnScreen();
        int x = location.x;
        int y = location.y;
        dialog.setLocation(x - 466, y - 514);
        if (!(dialog.isVisible())) {
            Runnable doRun = new Runnable() {

                @Override
                public void run() {
                    dialog.setVisible(true);
                    //setFocusButton();
                    //another method that moving Focus to the desired JComponent
                }
            };
            SwingUtilities.invokeLater(doRun);
        }
    }
}

for example

private void showDialog() {
    if (canShow) {
        location = myButton.getLocationOnScreen();
        int x = location.x;
        int y = location.y;
        dialog.setLocation(x - 466, y - 514);
        if (!(dialog.isVisible())) {
            Runnable doRun = new Runnable() {

                @Override
                public void run() {
                    dialog.setVisible(true);
                    //setFocusButton();
                    //another method that moving Focus to the desired JComponent
                }
            };
            SwingUtilities.invokeLater(doRun);
        }
    }
}

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陌伤浅笑 2024-12-13 01:20:54

这个很好的方法会帮助你：

// Convert a coordinate relative to a component's bounds to screen coordinates
Point pt = new Point(component.getLocation());
SwingUtilities.convertPointToScreen(pt, component);
// pt is now the absolute screen coordinate of the component

添加：我没有意识到，但就像mKorbel写的那样，你可以简单地调用

Point pt = component.getLocationOnScreen();

This nice method will help you:

// Convert a coordinate relative to a component's bounds to screen coordinates
Point pt = new Point(component.getLocation());
SwingUtilities.convertPointToScreen(pt, component);
// pt is now the absolute screen coordinate of the component

Add: I didn't realise, but like mKorbel wrote, you can simply call

Point pt = component.getLocationOnScreen();

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椒妓 2024-12-13 01:20:54

由于您想要在给定组件的正上方生成一个新框架，因此您需要获取组件的屏幕坐标。

为此，您需要使用组件的 getLocationOnScreen() 方法。

这是一个有用的代码片段：

public void showFrameAboveCmp(Frame frame, Component cmp) {
    Dimension size = cmp.getSize();
    Point loc = cmp.getLocationOnScreen();
    Dimension frameSize = frame.getSize();
    loc.x += (size.width  - frameSize.width)/2;
    loc.y += (size.height - frameSize.height)/2;
    frame.setBounds(loc.x, loc.y, frameSize.width, frameSize.height);
    frame.setVisible(true);
}

Since you want to spawn a new frame right above a given component, you want to get the screen coordinates of your component.

For this, you need to use the getLocationOnScreen() method of your component.

Here is a useful code snippet :

public void showFrameAboveCmp(Frame frame, Component cmp) {
    Dimension size = cmp.getSize();
    Point loc = cmp.getLocationOnScreen();
    Dimension frameSize = frame.getSize();
    loc.x += (size.width  - frameSize.width)/2;
    loc.y += (size.height - frameSize.height)/2;
    frame.setBounds(loc.x, loc.y, frameSize.width, frameSize.height);
    frame.setVisible(true);
}

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