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42 #include <QtGui/qplaintextedit.h>
43 #include <QtGui/qtextedit.h>
44 #include <QtGui/qscroller.h>
45 #include <QtGui/qscrollarea.h>
48 #ifndef TEXTEDITAUTORESIZER_H
49 #define TEXTEDITAUTORESIZER_H
51 class TextEditAutoResizer : public QObject
55 TextEditAutoResizer(QWidget *parent)
56 : QObject(parent), plainTextEdit(qobject_cast<QPlainTextEdit *>(parent)),
57 textEdit(qobject_cast<QTextEdit *>(parent)), edit(qobject_cast<QFrame *>(parent))
59 // parent must either inherit QPlainTextEdit or QTextEdit!
60 Q_ASSERT(plainTextEdit || textEdit);
62 connect(parent, SIGNAL(textChanged()), this, SLOT(textEditChanged()));
63 connect(parent, SIGNAL(cursorPositionChanged()), this, SLOT(textEditChanged()));
69 inline void textEditChanged();
72 QPlainTextEdit *plainTextEdit;
77 void TextEditAutoResizer::textEditChanged()
79 QTextDocument *doc = textEdit ? textEdit->document() : plainTextEdit->document();
80 QRect cursor = textEdit ? textEdit->cursorRect() : plainTextEdit->cursorRect();
82 QSize s = doc->size().toSize();
84 s.setHeight((s.height() + 2) * edit->fontMetrics().lineSpacing());
86 const QRect fr = edit->frameRect();
87 const QRect cr = edit->contentsRect();
89 edit->setMinimumHeight(qMax(70, s.height() + (fr.height() - cr.height() - 1)));
91 // make sure the cursor is visible in case we have a QAbstractScrollArea parent
92 QPoint pos = edit->pos();
93 QWidget *pw = edit->parentWidget();
95 if (qobject_cast<QScrollArea *>(pw))
97 pw = pw->parentWidget();
101 QScrollArea *area = static_cast<QScrollArea *>(pw);
102 QPoint scrollto = area->widget()->mapFrom(edit, cursor.center());
103 QPoint margin(10 + cursor.width(), 2 * cursor.height());
106 QScroller::scroller(area)->ensureVisible(scrollto, margin.x(), margin.y());
108 area->ensureVisible(scrollto.x(), scrollto.y(), margin.x(), margin.y());