下面列出了javax.swing.text.View#getView ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Returns the baseline for single line text components, like
* <code>JTextField</code>.
*/
private static int getSingleLineTextBaseline(JTextComponent textComponent, int h) {
View rootView = textComponent.getUI().getRootView(textComponent);
if (rootView.getViewCount() > 0) {
Insets insets = textComponent.getInsets();
int height = h - insets.top - insets.bottom;
int y = insets.top;
View fieldView = rootView.getView(0);
int vspan = (int) fieldView.getPreferredSpan(View.Y_AXIS);
if (height != vspan) {
int slop = height - vspan;
y += slop / 2;
}
FontMetrics fm = textComponent.getFontMetrics(textComponent.getFont());
y += fm.getAscent();
return y;
}
return -1;
}
static int viewToModel(JTextComponent tc, double x, double y, Position.Bias[] biasReturn) {
int offs = -1;
Document doc = tc.getDocument();
if (doc instanceof AbstractDocument) {
((AbstractDocument)doc).readLock();
}
try {
Rectangle alloc = getVisibleEditorRect(tc);
if (alloc != null) {
View rootView = tc.getUI().getRootView(tc);
View documentView = rootView.getView(0);
if (documentView instanceof EditorView) {
documentView.setSize(alloc.width, alloc.height);
offs = ((EditorView) documentView).viewToModelChecked(x, y, alloc, biasReturn);
} else {
rootView.setSize(alloc.width, alloc.height);
offs = rootView.viewToModel((float) x, (float) y, alloc, biasReturn);
}
}
} finally {
if (doc instanceof AbstractDocument) {
((AbstractDocument)doc).readUnlock();
}
}
return offs;
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void checkChildrenParent(View v) {
int cnt = v.getViewCount();
for (int i = 0; i < cnt; i++) {
View child = v.getView(i);
View childParent = child.getParent();
if (childParent != v) {
throw new IllegalStateException("child=" + child // NOI18N
+ " has parent=" + childParent // NOI18N
+ " instead of " + v // NOI18N
);
}
checkChildrenParent(child);
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
public static DocumentView get(JTextComponent component) {
TextUI textUI = component.getUI();
if (textUI != null) {
View rootView = textUI.getRootView(component);
if (rootView != null && rootView.getViewCount() > 0) {
View view = rootView.getView(0);
if (view instanceof DocumentView) {
return (DocumentView)view;
}
}
}
return null;
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private void test() {
View root = ((View)label.getClientProperty(BasicHTML.propertyKey))
.getView(0);
int n = root.getViewCount();
View v = root.getView(n - 1);
AttributeSet attrs = v.getAttributes();
StyleSheet ss = ((HTMLDocument) v.getDocument()).getStyleSheet();
Font font = ss.getFont(attrs);
System.out.println(font.getSize());
passed = (font.getSize() == 12);
if(!passed) {
throw new RuntimeException("Test failed.");
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
public int getPreviousLineCount0() {
int lineCount = 0;
View parent = this.getParent();
int count = parent.getViewCount();
for (int i = 0; i < count; i++) {
if (parent.getView(i) == this) {
break;
} else {
lineCount += parent.getView(i).getViewCount();
}
}
return lineCount;
}
private static void retrieveGlyphViews(View root) {
for (int i=0; i<= root.getViewCount()-1; i++) {
View view = root.getView(i);
if (view instanceof GlyphView && view.isVisible()) {
if (!glyphViews.contains(view)) {
glyphViews.add((GlyphView)view);
}
} else {
retrieveGlyphViews(view);
}
}
}
private boolean printView(Graphics2D graphics2D, Shape allocation,
View view) {
boolean pageExists = false;
Rectangle clipRectangle = graphics2D.getClipBounds();
Shape childAllocation;
View childView;
if (view.getViewCount() > 0) {
for (int i = 0; i < view.getViewCount(); i++) {
childAllocation = view.getChildAllocation(i, allocation);
if (childAllocation != null) {
childView = view.getView(i);
if (printView(graphics2D, childAllocation, childView)) {
pageExists = true;
}
}
}
}
else {
// I
if (allocation.getBounds().getMaxY() >= clipRectangle.getY()) {
pageExists = true;
// II
if ((allocation.getBounds().getHeight() > clipRectangle.getHeight()) &&
(allocation.intersects(clipRectangle))) {
view.paint(graphics2D, allocation);
}
else {
// III
if (allocation.getBounds().getY() >= clipRectangle.getY()) {
if (allocation.getBounds().getMaxY() <= clipRectangle.getMaxY()) {
view.paint(graphics2D, allocation);
}
else {
// IV
if (allocation.getBounds().getY() < pageEndY) {
pageEndY = allocation.getBounds().getY();
}
}
}
}
}
}
return pageExists;
}
public void actionPerformed(ActionEvent evt, JTextComponent target) {
AbstractDocument adoc = (AbstractDocument)target.getDocument();
// Dump fold hierarchy
FoldHierarchy hierarchy = FoldHierarchy.get(target);
adoc.readLock();
try {
hierarchy.lock();
try {
/*DEBUG*/System.err.println("FOLD HIERARCHY DUMP:\n" + hierarchy); // NOI18N
TokenHierarchy<?> th = TokenHierarchy.get(adoc);
/*DEBUG*/System.err.println("TOKEN HIERARCHY DUMP:\n" + (th != null ? th : "<NULL-TH>")); // NOI18N
} finally {
hierarchy.unlock();
}
} finally {
adoc.readUnlock();
}
View rootView = null;
TextUI textUI = target.getUI();
if (textUI != null) {
rootView = textUI.getRootView(target); // Root view impl in BasicTextUI
if (rootView != null && rootView.getViewCount() == 1) {
rootView = rootView.getView(0); // Get DocumentView
}
}
if (rootView != null) {
String rootViewDump = (rootView instanceof DocumentView)
? ((DocumentView)rootView).toStringDetail()
: rootView.toString();
/*DEBUG*/System.err.println("DOCUMENT VIEW: " + System.identityHashCode(rootView) + // NOI18N
"\n" + rootViewDump); // NOI18N
int caretOffset = target.getCaretPosition();
int caretViewIndex = rootView.getViewIndex(caretOffset, Position.Bias.Forward);
/*DEBUG*/System.err.println("caretOffset=" + caretOffset + ", caretViewIndex=" + caretViewIndex); // NOI18N
if (caretViewIndex >= 0 && caretViewIndex < rootView.getViewCount()) {
View caretView = rootView.getView(caretViewIndex);
/*DEBUG*/System.err.println("caretView: " + caretView); // NOI18N
}
/*DEBUG*/System.err.println(FixLineSyntaxState.lineInfosToString(adoc));
// Check the hierarchy correctness
//org.netbeans.editor.view.spi.ViewUtilities.checkViewHierarchy(rootView);
}
if (adoc instanceof BaseDocument) {
/*DEBUG*/System.err.println("DOCUMENT:\n" + ((BaseDocument)adoc).toStringDetail()); // NOI18N
}
}
private boolean printView(final Graphics2D graphics2D,
final Shape allocation, final View view) {
boolean pageExists = false;
final Rectangle clipRectangle = new Rectangle(0, 0, (int) (pageFormat
.getImageableWidth() / SCALE), (int) clientHeight);
Shape childAllocation;
View childView;
if (view.getViewCount() > 0) {
for (int i = 0; i < view.getViewCount(); i++) {
childAllocation = view.getChildAllocation(i, allocation);
if (childAllocation != null) {
childView = view.getView(i);
if (printView(graphics2D, childAllocation, childView)) {
pageExists = true;
}
}
}
} else {
if (allocation.getBounds().getMaxY() >= clipRectangle.getY()) {
if (allocation.getBounds().getHeight() > clipRectangle
.getHeight()
&& allocation.intersects(clipRectangle)) {
paintView(graphics2D, view, allocation);
pageExists = true;
} else {
if (allocation.getBounds().getY() >= clipRectangle.getY()) {
if (allocation.getBounds().getMaxY() <= clipRectangle
.getMaxY()) {
paintView(graphics2D, view, allocation);
pageExists = true;
} else {
if (allocation.getBounds().getY() < pageEndY) {
pageEndY = allocation.getBounds().getY();
}
}
}
}
}
}
return pageExists;
}