下面列出了java.awt.font.TextHitInfo#getInsertionIndex ( ) 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。
@Override
public int viewToModel(float x, float y, Shape a, Bias[] biasReturn)
{
Rectangle alloc = toRect(a);
// Move the y co-ord of the hit onto the baseline. This is because
// TextLayout supports
// italic carets and we do not.
TextLayout layout = getTextLayout();
TextHitInfo hit = layout.hitTestChar(x - (float) alloc.getX(), 0f);
// TextHitInfo hit = layout.hitTestChar(x - box.getAbsoluteContentX(),
// 0f);
int pos = hit.getInsertionIndex();
biasReturn[0] = hit.isLeadingEdge() ? Position.Bias.Forward
: Position.Bias.Backward;
return pos + getStartOffset();
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
static int viewToIndex(TextLayout textLayout, double x, Shape alloc, Position.Bias[] biasReturn) {
Rectangle2D bounds = ViewUtils.shapeAsRect(alloc);
TextHitInfo hitInfo = x2Index(textLayout, (float)(x - bounds.getX()));
if (biasReturn != null) {
biasReturn[0] = hitInfo.isLeadingEdge() ? Position.Bias.Forward : Position.Bias.Backward;
}
return hitInfo.getInsertionIndex();
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(@Nonnull InputMethodEvent e) {
if (composedText != null) {
int dot = composedTextRange.getStartOffset();
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
dot += caretPos.getInsertionIndex();
}
getCaretModel().moveToOffset(dot);
getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}
private int calcCaretPosition(final int hitLine, final double x, final double y) {
final ZyLineContent content = m_content.getLineContent(hitLine);
final TextLayout textlayout = m_content.getLineContent(hitLine).getTextLayout();
final TextHitInfo hitInfo = textlayout.hitTestChar((float) x, (float) y, content.getBounds());
return hitInfo.getInsertionIndex();
}
private int calcHitPosition(final int caretPosition, final double x, final double y,
final double zoomFactor) {
boolean switched = false;
int lp = m_mouse_pressed_y;
int lr = m_mouse_released_y;
if (lp > lr) {
lp = m_mouse_released_y;
lr = m_mouse_pressed_y;
switched = true;
}
final int linecount = m_content.getLineCount();
final double height = (float) m_content.getLineHeight();
int maxIndex = caretPosition;
for (int line = lp; line <= lr; line++) {
double deltaY = 0;
if (switched) {
deltaY = height * zoomFactor * line;
} else {
deltaY = -(height * zoomFactor * (linecount - line));
}
final TextLayout textLayout = m_content.getLineContent(line).getTextLayout();
final TextHitInfo hitInfo =
textLayout.hitTestChar((float) x, (float) (y + deltaY), textLayout.getBounds());
final int insertionIndex = hitInfo.getInsertionIndex();
if ((caretPosition < insertionIndex) && (insertionIndex > maxIndex)) {
maxIndex = insertionIndex;
}
}
return maxIndex;
}
private void setInputMethodCaretPosition(InputMethodEvent e) {
int dot;
if (composedTextExists()) {
dot = composedTextStart.getOffset();
if (!(caret instanceof ComposedTextCaret)) {
if (composedTextCaret == null) {
composedTextCaret = new ComposedTextCaret();
}
originalCaret = caret;
// Sets composed text caret
exchangeCaret(originalCaret, composedTextCaret);
}
TextHitInfo caretPos = e.getCaret();
if (caretPos != null) {
int index = caretPos.getInsertionIndex();
dot += index;
if (index == 0) {
// Scroll the component if needed so that the composed text
// becomes visible.
try {
Rectangle d = modelToView(dot);
Rectangle end = modelToView(composedTextEnd.getOffset());
Rectangle b = getBounds();
d.x += Math.min(end.x - d.x, b.width);
scrollRectToVisible(d);
} catch (BadLocationException ble) {}
}
}
caret.setDot(dot);
} else if (caret instanceof ComposedTextCaret) {
dot = caret.getDot();
// Restores original caret
exchangeCaret(caret, originalCaret);
caret.setDot(dot);
}
}