/**
* Overridden to use the editor's background if it's detected that the user isn't using white as
* the editor bg, but the system's tool tip background is yellow-ish.
*
* @return The tool tip.
*/
public JToolTip createToolTip() {
JToolTip tip = super.createToolTip();
Color textAreaBG = textArea.getBackground();
if (textAreaBG != null && !Color.white.equals(textAreaBG)) {
Color bg = TipUtil.getToolTipBackground();
// If current L&F's tool tip color is close enough to "yellow",
// and we're not using the default text background of white, use
// the editor background as the tool tip background.
if (bg.getRed() >= 240 && bg.getGreen() >= 240 && bg.getBlue() >= 200) {
tip.setBackground(textAreaBG);
}
}
return tip;
}
/**
* Tweaks a <code>JEditorPane</code> 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 <code>HTMLDocument</code>.
*
* @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
boolean isNimbus = isNimbusLookAndFeel();
if (isNimbus) {
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);
// Set the foreground color. Important because when rendering HTML,
// default foreground becomes black, which may not match all LAF's
// (e.g. Substance).
Color fg = UIManager.getColor("Label.foreground");
if (fg == null || (isNimbus && isDerivedColor(fg))) {
fg = SystemColor.textText;
}
textArea.setForeground(fg);
// 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();
setFont(doc, font, fg);
// Always add link foreground rule. Unfortunately these CSS rules
// stack each time the LaF is changed (how can we overwrite them
// without clearing out the important "standard" ones?).
Color linkFG = RSyntaxUtilities.getHyperlinkForeground();
doc.getStyleSheet().addRule("a { color: " + getHexString(linkFG) + "; }");
}