Java JComponent Size getLocalScreenSize(Component invoker)

Description

Gets the screen size.

License

Open Source License

Parameter

Parameter	Description
invoker	the invoker component

Return

the screen size.

Declaration

public static Dimension getLocalScreenSize(Component invoker) 

Method Source Code

//package com.java2s;
import javax.swing.*;
import java.awt.*;

public class Main {
    /**//from w  w  w  .ja  v  a2  s.  c om
     * Gets the screen size. In JDK1.4+, the returned size will exclude task bar area on Windows OS.
     *
     * @param invoker the invoker component
     * @return the screen size.
     */
    public static Dimension getLocalScreenSize(Component invoker) {
        //      ensureScreenBounds();

        // jdk1.4 only
        if (invoker != null && !(invoker instanceof JApplet) && invoker.getGraphicsConfiguration() != null) {
            // to handle multi-display case
            GraphicsConfiguration gc = invoker.getGraphicsConfiguration();
            Rectangle bounds = gc.getBounds();
            Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(gc);
            bounds.width -= insets.left + insets.right;
            bounds.height -= insets.top + insets.bottom;
            return bounds.getSize();
        } else {
            return getScreenSize(invoker);
        }
    }

    /**
     * Gets the screen size. In JDK1.4+, the returned size will exclude task bar area on Windows OS.
     *
     * @param invoker the invoker component
     * @return the screen size.
     */
    public static Dimension getScreenSize(Component invoker) {
        // to handle multi-display case
        Dimension screenSize = getScreenBounds().getSize();

        // jdk1.4 only
        if (invoker != null && !(invoker instanceof JApplet) && invoker.getGraphicsConfiguration() != null) {
            Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(invoker.getGraphicsConfiguration());
            screenSize.width -= insets.left + insets.right;
            screenSize.height -= insets.top + insets.bottom;
        }

        return screenSize;
    }

    /**
     * Gets the screen bounds. In JDK1.4+, the returned bounds will exclude task bar area on Windows OS. If the invoker
     * is null, the whole screen bounds including all display devices will be returned. If the invoker is not null and
     * the useInvokeDevice flag is true, the screen of the display device for the invoker will be returned.
     *
     * @param invoker          the invoker component
     * @param useInvokerDevice the flag to return invoker device or not
     * @return the screen bounds.
     */
    public static Rectangle getScreenBounds(Component invoker, boolean useInvokerDevice) {
        // to handle multi-display case
        Rectangle bounds = (!useInvokerDevice || invoker == null || invoker.getGraphicsConfiguration() == null)
                ? (Rectangle) getScreenBounds().clone()
                : invoker.getGraphicsConfiguration().getBounds();

        // TODO
        // jdk1.4 only
        if (invoker != null && !(invoker instanceof JApplet) && invoker.getGraphicsConfiguration() != null) {
            Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(invoker.getGraphicsConfiguration());
            bounds.x += insets.left;
            bounds.y += insets.top;
            bounds.width -= insets.left + insets.right;
            bounds.height -= insets.top + insets.bottom;
        }

        return bounds;
    }

    /**
     * Gets the screen bounds. In JDK1.4+, the returned bounds will exclude task bar area on Windows OS.
     * <p/>
     * By default, it will not use invoker graphic device automatically.
     *
     * @param invoker the invoker component
     * @return the screen bounds.
     * @see #getScreenBounds(java.awt.Component, boolean)
     */
    public static Rectangle getScreenBounds(Component invoker) {
        return getScreenBounds(invoker, false);
    }

    private static Rectangle getScreenBounds() {
        Rectangle SCREEN_BOUNDS = new Rectangle();
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice[] gs = ge.getScreenDevices();
        for (GraphicsDevice gd : gs) {
            GraphicsConfiguration gc = gd.getDefaultConfiguration();
            SCREEN_BOUNDS = SCREEN_BOUNDS.union(gc.getBounds());
        }
        return SCREEN_BOUNDS;
    }
}

Related

1. fixSize(T comp, int width)
2. forceSize(JComponent component, int width, int height)
3. freezeSize(JComponent c, Dimension s)
4. getCentralLocation(Component sourceComp, Component comp, Dimension size)
5. getComponentOfSameSize(final JComponent c)
6. getMaxSize(JComponent[] components)
7. getOptimalScreenSize(Container container, Dimension currentDim)
8. getPreferredSize(JComponent component, int width)
9. getPreferredSize(String html, boolean width, int prefSize)