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Moved createImageCursor() into SwingUtil.

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@1132 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
mdb
2003-05-15 22:02:11 +00:00
parent b728c6f5df
commit 9e01d5b9fc
2 changed files with 63 additions and 61 deletions
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projects/samskivert/src/java/com/samskivert/swing/dnd/DnDManager.java
+1 -60
View File
@@ -1,5 +1,5 @@
//
// $Id: DnDManager.java,v 1.17 2003/05/09 21:32:11 ray Exp $
// $Id: DnDManager.java,v 1.18 2003/05/15 22:02:11 mdb Exp $
package com.samskivert.swing.dnd;
@@ -8,13 +8,11 @@ import java.awt.Container;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.IllegalComponentStateException;
import java.awt.Image;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Transparency;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
@@ -99,63 +97,6 @@ public class DnDManager
singleton.removeTarget(comp);
}
/**
* Create a custom cursor out of the specified image, putting the hotspot
* in the exact center of the created cursor.
*/
public static Cursor createImageCursor (Image img)
{
return createImageCursor(img, null);
}
/**
* Create a custom cursor out of the specified image, with the specified
* hotspot.
*/
public static Cursor createImageCursor (Image img, Point hotspot)
{
Toolkit tk = Toolkit.getDefaultToolkit();
// for now, just report the cursor restrictions, then blindly create
int w = img.getWidth(null);
int h = img.getHeight(null);
Dimension d = tk.getBestCursorSize(w, h);
int colors = tk.getMaximumCursorColors();
Log.debug("Creating custom cursor [desiredSize=" + w + "x" + h +
", bestSize=" + d.width + "x" + d.height +
", maxcolors=" + colors + "].");
// if the passed-in image is smaller, pad it with transparent pixels
// and use it anyway.
if (((w < d.width) && (h <= d.height)) ||
((w <= d.width) && (h < d.height))) {
Image padder = GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration().
createCompatibleImage(d.width, d.height, Transparency.BITMASK);
Graphics g = padder.getGraphics();
g.drawImage(img, 0, 0, null);
g.dispose();
// and reassign the image to the padded image
img = padder;
// and adjust the 'best' to cheat the hotspot checking code
d.width = w;
d.height = h;
}
// make sure the hotspot is valid
if (hotspot == null) {
hotspot = new Point(d.width / 2, d.height / 2);
} else {
hotspot.x = Math.min(d.width - 1, Math.max(0, hotspot.x));
hotspot.y = Math.min(d.height - 1, Math.max(0, hotspot.y));
}
// and create the cursor
return tk.createCustomCursor(img, hotspot, "samskivertDnDCursor");
}
/**
* Restrict construction.
*/
projects/samskivert/src/java/com/samskivert/swing/util/SwingUtil.java
+62 -1
View File
@@ -1,5 +1,5 @@
//
// $Id: SwingUtil.java,v 1.22 2003/04/04 18:55:24 mdb Exp $
// $Id: SwingUtil.java,v 1.23 2003/05/15 22:02:11 mdb Exp $
//
// samskivert library - useful routines for java programs
// Copyright (C) 2001 Michael Bayne
@@ -22,16 +22,20 @@ package com.samskivert.swing.util;
import java.awt.Component;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Point;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Toolkit;
import java.awt.Transparency;
import java.awt.Window;
import java.awt.geom.Area;
@@ -532,4 +536,61 @@ public class SwingUtil
c.revalidate();
c.repaint();
}
/**
* Create a custom cursor out of the specified image, putting the hotspot
* in the exact center of the created cursor.
*/
public static Cursor createImageCursor (Image img)
{
return createImageCursor(img, null);
}
/**
* Create a custom cursor out of the specified image, with the specified
* hotspot.
*/
public static Cursor createImageCursor (Image img, Point hotspot)
{
Toolkit tk = Toolkit.getDefaultToolkit();
// for now, just report the cursor restrictions, then blindly create
int w = img.getWidth(null);
int h = img.getHeight(null);
Dimension d = tk.getBestCursorSize(w, h);
int colors = tk.getMaximumCursorColors();
// Log.debug("Creating custom cursor [desiredSize=" + w + "x" + h +
// ", bestSize=" + d.width + "x" + d.height +
// ", maxcolors=" + colors + "].");
// if the passed-in image is smaller, pad it with transparent pixels
// and use it anyway.
if (((w < d.width) && (h <= d.height)) ||
((w <= d.width) && (h < d.height))) {
Image padder = GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration().
createCompatibleImage(d.width, d.height, Transparency.BITMASK);
Graphics g = padder.getGraphics();
g.drawImage(img, 0, 0, null);
g.dispose();
// and reassign the image to the padded image
img = padder;
// and adjust the 'best' to cheat the hotspot checking code
d.width = w;
d.height = h;
}
// make sure the hotspot is valid
if (hotspot == null) {
hotspot = new Point(d.width / 2, d.height / 2);
} else {
hotspot.x = Math.min(d.width - 1, Math.max(0, hotspot.x));
hotspot.y = Math.min(d.height - 1, Math.max(0, hotspot.y));
}
// and create the cursor
return tk.createCustomCursor(img, hotspot, "samskivertDnDCursor");
}
}