org.fife.ui.autocomplete.TipUtil Maven / Gradle / Ivy
/*
* 08/13/2009
*
* TipUtil.java - Utility methods for homemade tool tips.
* Copyright (C) 2009 Robert Futrell
* robert_futrell at users.sourceforge.net
* http://fifesoft.com/rsyntaxtextarea
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.fife.ui.autocomplete;
import java.awt.Color;
import java.awt.Font;
import java.awt.SystemColor;
import javax.swing.BorderFactory;
import javax.swing.JEditorPane;
import javax.swing.UIManager;
import javax.swing.plaf.ColorUIResource;
import javax.swing.text.html.HTMLDocument;
/**
* Static utility methods for homemade tool tips.
*
* This is blatantly ripped off from RSyntaxTextArea's "FocusableTips" class
* of the same name, but isn't re-used to prevent a hard dependency on the
* RSTA library.
*
* @author Robert Futrell
* @version 1.0
*/
class TipUtil {
private TipUtil() {
}
/**
* Returns the default background color to use for tool tip windows.
*
* @return The default background color.
*/
public static Color getToolTipBackground() {
Color c = UIManager.getColor("ToolTip.background");
// Tooltip.background is wrong color on Nimbus (!)
if (c==null || UIManager.getLookAndFeel().getName().equals("Nimbus")) {
c = UIManager.getColor("info"); // Used by Nimbus (and others)
if (c==null) {
c = SystemColor.info; // System default
}
}
// Workaround for a bug (?) with Nimbus - calling JLabel.setBackground()
// with a ColorUIResource does nothing, must be a normal Color
if (c instanceof ColorUIResource) {
c = new Color(c.getRGB());
}
return c;
}
/**
* Tweaks a JEditorPane so it can be used to render the
* content in a focusable pseudo-tool tip. It is assumed that the editor
* pane is using an HTMLDocument.
*
* @param textArea The editor pane to tweak.
*/
public static void tweakTipEditorPane(JEditorPane textArea) {
// Jump through a few hoops to get things looking nice in Nimbus
if (UIManager.getLookAndFeel().getName().equals("Nimbus")) {
Color selBG = textArea.getSelectionColor();
Color selFG = textArea.getSelectedTextColor();
textArea.setUI(new javax.swing.plaf.basic.BasicEditorPaneUI());
textArea.setSelectedTextColor(selFG);
textArea.setSelectionColor(selBG);
}
textArea.setEditable(false); // Required for links to work!
textArea.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
// Make selection visible even though we are not (initially) focusable.
textArea.getCaret().setSelectionVisible(true);
// Make it use the "tool tip" background color.
textArea.setBackground(TipUtil.getToolTipBackground());
// Force JEditorPane to use a certain font even in HTML.
// All standard LookAndFeels, even Nimbus (!), define Label.font.
Font font = UIManager.getFont("Label.font");
if (font == null) { // Try to make a sensible default
font = new Font("SansSerif", Font.PLAIN, 12);
}
HTMLDocument doc = (HTMLDocument) textArea.getDocument();
doc.getStyleSheet().addRule(
"body { font-family: " + font.getFamily() + "; font-size: "
+ font.getSize() + "pt; }");
}
}