在屏幕上查找复合位置

发布于 2024-07-10 07:16:30 字数 683 浏览 5 评论 0原文

我正在 Java 中为 SWT 和 AWT 实现一个屏幕键盘。一件重要的事情是将键盘移动到可以显示所选文本字段的位置，并且不要位于屏幕键盘后面。

对于 AWT，我可以检测当前所选组件的位置，

Component owner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
if (owner == null) {
    return;
}
Point ownerLocation = owner.getLocationOnScreen();
Dimension ownerSize = owner.getSize();

如何在 SWT 中实现相同的逻辑？我通过向 SWT 事件队列添加焦点侦听器来获取当前选定的小部件。但是当我打电话时，

Point location = new Point(mTextWidget.getLocation().x, mTextWidget.getLocation().y);
Dimension dimension = new Dimension(mTextWidget.getSize().x, mTextWidget.getSize().y);

我将获得相对于父组合的位置。

如何获取特定小部件相对于整个屏幕的位置？

原文

I am implementing a on screen keyboard in Java for SWT and AWT.
One important thing is to move the keyboard to a position where the selected text field can show and is not lying behind the on screen keyboard.

For AWT i can detect the position of the current selected component with

Component owner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
if (owner == null) {
    return;
}
Point ownerLocation = owner.getLocationOnScreen();
Dimension ownerSize = owner.getSize();

How can i implement the same logic in SWT?
I get the current selected widget by adding a focuslistener to the SWT event queue. But when i call

Point location = new Point(mTextWidget.getLocation().x, mTextWidget.getLocation().y);
Dimension dimension = new Dimension(mTextWidget.getSize().x, mTextWidget.getSize().y);

I will get the position relativ to the parent composite.

How can i get the location of a special widget relativ to the complete screen?

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赠意 2024-07-17 07:16:30

我相信方法 Control.toDisplay() 应该能够将您的坐标转换为相对于屏幕的坐标。

此 snippet 可能会说明您所追求的内容：

package org.eclipse.jface.snippets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class Bla {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);

        final Text t = new Text(shell,SWT.BORDER);
        t.setBounds(new Rectangle(10,10,200,30));
        System.err.println(t.toDisplay(1, 1));

        Button b = new Button(shell,SWT.PUSH);
        b.setText("Show size");
        b.setBounds(new Rectangle(220,10,100,20));
        b.addSelectionListener(new SelectionAdapter() {

            public void widgetSelected(SelectionEvent e) {
                System.err.println(t.toDisplay(1, 1)); 
            }

        });

        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }

        display.dispose();
    }
}

I believe the method Control.toDisplay() should be able to translate your coordinates into ones relative to the screen.

This snippet may illustrate what you are after:

package org.eclipse.jface.snippets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class Bla {
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);

        final Text t = new Text(shell,SWT.BORDER);
        t.setBounds(new Rectangle(10,10,200,30));
        System.err.println(t.toDisplay(1, 1));

        Button b = new Button(shell,SWT.PUSH);
        b.setText("Show size");
        b.setBounds(new Rectangle(220,10,100,20));
        b.addSelectionListener(new SelectionAdapter() {

            public void widgetSelected(SelectionEvent e) {
                System.err.println(t.toDisplay(1, 1)); 
            }

        });

        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }

        display.dispose();
    }
}

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