Changeset 561 for trunk/src/gui/widgets/qplaintextedit.cpp

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/widgets/qplaintextedit.cpp (modified) (34 diffs)

trunk/src/gui/widgets/qplaintextedit.cpp

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
@@ -21 +22 @@
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain
-** additional rights. These rights are described in the Nokia Qt LGPL
-** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -66 +66 @@
 #include <qtexttable.h>
 #include <qvariant.h>
-
 #include <qinputcontext.h>
 
@@ -72 +71 @@
 
 QT_BEGIN_NAMESPACE
+
+static inline bool shouldEnableInputMethod(QPlainTextEdit *plaintextedit)
+{
+    return !plaintextedit->isReadOnly();
+}
 
 class QPlainTextDocumentLayoutPrivate : public QAbstractTextDocumentLayoutPrivate
@@ -110 +114 @@
     \brief The QPlainTextDocumentLayout class implements a plain text layout for QTextDocument
 
-    \ingroup text
-
+    \ingroup richtext-processing
 
    A QPlainTextDocumentLayout is required for text documents that can
@@ -251 +254 @@
 void QPlainTextDocumentLayout::requestUpdate()
 {
-    emit update(QRectF(0., -4., 1000000000., 1000000000.));
+    emit update(QRectF(0., -document()->documentMargin(), 1000000000., 1000000000.));
 }
 
@@ -346 +349 @@
 
     if (!d->blockUpdate)
-        emit update(); // optimization potential
-
+        emit update(QRectF(0., -doc->documentMargin(), 1000000000., 1000000000.)); // optimization potential
 }
 
@@ -356 +358 @@
     QTextDocument *doc = document();
     qreal margin = doc->documentMargin();
-    QFontMetrics fm(doc->defaultFont());
     qreal blockMaximumWidth = 0;
 
-    int leading = qMax(0, fm.leading());
     qreal height = 0;
     QTextLayout *tl = block.layout();
@@ -371 +371 @@
     }
     tl->beginLayout();
+    qreal availableWidth = d->width;
+    if (availableWidth <= 0) {
+        availableWidth = qreal(INT_MAX); // similar to text edit with pageSize.width == 0
+    }
+    availableWidth -= 2*margin + extraMargin;
     while (1) {
         QTextLine line = tl->createLine();
         if (!line.isValid())
             break;
-        line.setLineWidth(d->width - 2*margin - extraMargin);
-
-        height += leading;
+        line.setLeadingIncluded(true);
+        line.setLineWidth(availableWidth);
         line.setPosition(QPointF(margin, height));
         height += line.height();
@@ -440 +444 @@
 {
     pageUpDownLastCursorYIsValid = false;
-};
+}
 
 void QPlainTextEditPrivate::_q_verticalScrollbarActionTriggered(int action) {
@@ -508 +512 @@
     int currentBlockNumber = topBlock;
     QTextBlock currentBlock = document()->findBlockByNumber(currentBlockNumber);
+    if (!currentBlock.isValid())
+        return -1;
+
     QPlainTextDocumentLayout *documentLayout = qobject_cast<QPlainTextDocumentLayout*>(document()->documentLayout());
     Q_ASSERT(documentLayout);
@@ -556 +563 @@
         return QRectF();
     Q_ASSERT(currentBlock.blockNumber() == currentBlockNumber);
-    QPlainTextDocumentLayout *documentLayout = qobject_cast<QPlainTextDocumentLayout*>(document()->documentLayout());
+    QTextDocument *doc = document();
+    QPlainTextDocumentLayout *documentLayout = qobject_cast<QPlainTextDocumentLayout*>(doc->documentLayout());
     Q_ASSERT(documentLayout);
 
@@ -563 +571 @@
         return QRectF();
     QRectF r = documentLayout->blockBoundingRect(currentBlock);
-    while (currentBlockNumber < blockNumber && offset.y() <= 2* textEdit->viewport()->height()) {
+    int maxVerticalOffset = r.height();
+    while (currentBlockNumber < blockNumber && offset.y() - maxVerticalOffset <= 2* textEdit->viewport()->height()) {
         offset.ry() += r.height();
         currentBlock = currentBlock.next();
         ++currentBlockNumber;
+        if (!currentBlock.isVisible()) {
+            currentBlock = doc->findBlockByLineNumber(currentBlock.firstLineNumber());
+            currentBlockNumber = currentBlock.blockNumber();
+        }
         r = documentLayout->blockBoundingRect(currentBlock);
     }
-    while (currentBlockNumber > blockNumber && offset.y() >= -textEdit->viewport()->height()) {
+    while (currentBlockNumber > blockNumber && offset.y() + maxVerticalOffset >= -textEdit->viewport()->height()) {
         currentBlock = currentBlock.previous();
+        --currentBlockNumber;
+        while (!currentBlock.isVisible()) {
+            currentBlock = currentBlock.previous();
+            --currentBlockNumber;
+        }
         if (!currentBlock.isValid())
             break;
-        --currentBlockNumber;
+
         r = documentLayout->blockBoundingRect(currentBlock);
         offset.ry() -= r.height();
@@ -625 +643 @@
     if (viewport->updatesEnabled() && viewport->isVisible()) {
         int dy = 0;
-        if (doc->findBlockByLineNumber(control->topBlock).isValid()) {
+        if (doc->findBlockByNumber(control->topBlock).isValid()) {
             dy = (int)(-q->blockBoundingGeometry(block).y())
                  + verticalOffset() - verticalOffset(blockNumber, lineNumber);
@@ -667 +685 @@
         qreal h = center ? line.naturalTextRect().center().y() : line.naturalTextRect().bottom();
 
+        QTextBlock previousVisibleBlock = block;
         while (h < height && block.previous().isValid()) {
-            block = block.previous();
+            previousVisibleBlock = block;
+            do {
+                block = block.previous();
+            } while (!block.isVisible() && block.previous().isValid());
             h += q->blockBoundingRect(block).height();
         }
@@ -682 +704 @@
         }
 
-        if (block.next().isValid() && l >= lineCount) {
-            block = block.next();
+        if (l >= lineCount) {
+            block = previousVisibleBlock;
             l = 0;
         }
@@ -706 +728 @@
       lineWrap(QPlainTextEdit::WidgetWidth),
       wordWrap(QTextOption::WrapAtWordBoundaryOrAnywhere),
-      topLine(0), pageUpDownLastCursorYIsValid(false)
+      clickCausedFocus(0),topLine(0), 
+      pageUpDownLastCursorYIsValid(false)
 {
     showCursorOnInitialShow = true;
@@ -743 +766 @@
     QObject::connect(control, SIGNAL(cursorPositionChanged()), q, SIGNAL(cursorPositionChanged()));
 
+    QObject::connect(control, SIGNAL(textChanged()), q, SLOT(updateMicroFocus()));
 
     // set a null page size initially to avoid any relayouting until the textedit
     // is shown. relayoutDocument() will take care of setting the page size to the
     // viewport dimensions later.
-    doc->setTextWidth(0);
+    doc->setTextWidth(-1);
     doc->documentLayout()->setPaintDevice(viewport);
     doc->setDefaultFont(q->font());
@@ -766 +790 @@
 #ifndef QT_NO_CURSOR
     viewport->setCursor(Qt::IBeamCursor);
+#endif
+    originalOffsetY = 0;
+#ifdef Q_WS_WIN
+    setSingleFingerPanEnabled(true);
 #endif
 }
@@ -986 +1014 @@
     plain text.
 
-    \ingroup text
-    \mainclass
+    \ingroup richtext-processing
+
 
     \tableofcontents
@@ -1000 +1028 @@
     QTextEdit, but is optimized for plain text handling.
 
-    QPlainTextEdit works on paragraphs and characters. A paragraph is a
-    formatted string which is word-wrapped to fit into the width of
+    QPlainTextEdit works on paragraphs and characters. A paragraph is
+    a formatted string which is word-wrapped to fit into the width of
     the widget. By default when reading plain text, one newline
     signifies a paragraph. A document consists of zero or more
-    paragraphs. The words in the paragraph are aligned in accordance
-    with the paragraph's alignment. Paragraphs are separated by hard
-    line breaks. Each character within a paragraph has its own
-    attributes, for example, font and color.
+    paragraphs. Paragraphs are separated by hard line breaks. Each
+    character within a paragraph has its own attributes, for example,
+    font and color.
 
     The shape of the mouse cursor on a QPlainTextEdit is
@@ -1015 +1042 @@
     \section1 Using QPlainTextEdit as a Display Widget
 
-    The text is set or replaced using setPlainText() which deletes any
-    existing text and replaces it with the text passed in the
-    setPlainText() call.
-
-    Text itself can be inserted using the QTextCursor class or using
-    the convenience functins insertPlainText(), appendPlainText() or
+    The text is set or replaced using setPlainText() which deletes the
+    existing text and replaces it with the text passed to setPlainText().
+
+    Text can be inserted using the QTextCursor class or using the
+    convenience functions insertPlainText(), appendPlainText() or
     paste().
 
-    By default the text edit wraps words at whitespace to fit within
+    By default, the text edit wraps words at whitespace to fit within
     the text edit widget. The setLineWrapMode() function is used to
     specify the kind of line wrap you want, \l WidgetWidth or \l
@@ -1149 +1175 @@
 
     \sa QTextDocument, QTextCursor, {Application Example},
-        {Syntax Highlighter Example}, {Rich Text Processing}
+        {Code Editor Example}, {Syntax Highlighter Example},
+        {Rich Text Processing}
 
 */
@@ -1429 +1456 @@
     }
 #endif
+    else if (e->type() == QEvent::Gesture) {
+        QGestureEvent *ge = static_cast<QGestureEvent *>(e);
+        QPanGesture *g = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture));
+        if (g) {
+            QScrollBar *hBar = horizontalScrollBar();
+            QScrollBar *vBar = verticalScrollBar();
+            if (g->state() == Qt::GestureStarted)
+                d->originalOffsetY = vBar->value();
+            QPointF offset = g->offset();
+            if (!offset.isNull()) {
+                if (QApplication::isRightToLeft())
+                    offset.rx() *= -1;
+                // QPlainTextEdit scrolls by lines only in vertical direction
+                QFontMetrics fm(document()->defaultFont());
+                int lineHeight = fm.height();
+                int newX = hBar->value() - g->delta().x();
+                int newY = d->originalOffsetY - offset.y()/lineHeight;
+                hBar->setValue(newX);
+                vBar->setValue(newY);
+            }
+        }
+        return true;
+    }
     return QAbstractScrollArea::event(e);
 }
@@ -1552 +1602 @@
 #endif
 
-    if (!(d->control->textInteractionFlags() & Qt::TextEditable)) {
+#ifndef QT_NO_SHORTCUT
+
+    Qt::TextInteractionFlags tif = d->control->textInteractionFlags();
+
+    if (tif & Qt::TextSelectableByKeyboard){
+        if (e == QKeySequence::SelectPreviousPage) {
+            e->accept();
+            d->pageUpDown(QTextCursor::Up, QTextCursor::KeepAnchor);
+            return;
+        } else if (e ==QKeySequence::SelectNextPage) {
+            e->accept();
+            d->pageUpDown(QTextCursor::Down, QTextCursor::KeepAnchor);
+            return;
+        }
+    }
+    if (tif & (Qt::TextSelectableByKeyboard | Qt::TextEditable)) {
+        if (e == QKeySequence::MoveToPreviousPage) {
+            e->accept();
+            d->pageUpDown(QTextCursor::Up, QTextCursor::MoveAnchor);
+            return;
+        } else if (e == QKeySequence::MoveToNextPage) {
+            e->accept();
+            d->pageUpDown(QTextCursor::Down, QTextCursor::MoveAnchor);
+            return;
+        }
+    }
+
+    if (!(tif & Qt::TextEditable)) {
         switch (e->key()) {
             case Qt::Key_Space:
@@ -1578 +1655 @@
         return;
     }
-
-#ifndef QT_NO_SHORTCUT
-    if (e == QKeySequence::MoveToPreviousPage) {
-            e->accept();
-            d->pageUpDown(QTextCursor::Up, QTextCursor::MoveAnchor);
-            return;
-    } else if (e == QKeySequence::MoveToNextPage) {
-            e->accept();
-            d->pageUpDown(QTextCursor::Down, QTextCursor::MoveAnchor);
-            return;
-    } else if (e == QKeySequence::SelectPreviousPage) {
-            e->accept();
-            d->pageUpDown(QTextCursor::Up, QTextCursor::KeepAnchor);
-            return;
-    } else if (e ==QKeySequence::SelectNextPage) {
-            e->accept();
-            d->pageUpDown(QTextCursor::Down, QTextCursor::KeepAnchor);
-            return;
-    }
 #endif // QT_NO_SHORTCUT
-
 
     d->sendControlEvent(e);
@@ -1609 +1666 @@
                     // Cursor position didn't change, so we want to leave
                     // these keys to change focus.
+                    e->ignore();
+                    return;
+                }
+                break;
+            case Qt::Key_Left:
+            case Qt::Key_Right:
+                if (QApplication::keypadNavigationEnabled()
+                        && QApplication::navigationMode() == Qt::NavigationModeKeypadDirectional) {
+                    // Same as for Key_Up and Key_Down.
                     e->ignore();
                     return;
@@ -1711 +1777 @@
     if (brush.style() >= Qt::LinearGradientPattern && brush.style() <= Qt::ConicalGradientPattern) {
         if (!gradientRect.isNull()) {
-            QTransform m;
-            m.translate(gradientRect.left(), gradientRect.top());
+            QTransform m = QTransform::fromTranslate(gradientRect.left(), gradientRect.top());
             m.scale(gradientRect.width(), gradientRect.height());
             brush.setTransform(m);
@@ -1742 +1807 @@
     QTextBlock block = firstVisibleBlock();
     qreal maximumWidth = document()->documentLayout()->documentSize().width();
-    
+
+    // Set a brush origin so that the WaveUnderline knows where the wave started
+    painter.setBrushOrigin(offset);
+
     // keep right margin clean from full-width selection
     int maxX = offset.x() + qMax((qreal)viewportRect.width(), maximumWidth)
@@ -1906 +1974 @@
         d->ensureCursorVisible();
     }
+
+    if (!isReadOnly() && rect().contains(e->pos()))
+        d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
+    d->clickCausedFocus = 0;
 }
 
@@ -2006 +2078 @@
 #endif
     d->sendControlEvent(e);
+    ensureCursorVisible();
 }
 
@@ -2039 +2112 @@
 {
     Q_D(QPlainTextEdit);
+    if (e->reason() == Qt::MouseFocusReason) {
+        d->clickCausedFocus = 1;
+    }
     QAbstractScrollArea::focusInEvent(e);
     d->sendControlEvent(e);
@@ -2305 +2381 @@
         flags = Qt::TextEditorInteraction;
     }
-    setAttribute(Qt::WA_InputMethodEnabled, !ro);
+    setAttribute(Qt::WA_InputMethodEnabled, shouldEnableInputMethod(this));
     d->control->setTextInteractionFlags(flags);
 }