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Diffstat (limited to 'tools/qml/texteditautoresizer_maemo5.h')
-rw-r--r-- | tools/qml/texteditautoresizer_maemo5.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/tools/qml/texteditautoresizer_maemo5.h b/tools/qml/texteditautoresizer_maemo5.h new file mode 100644 index 0000000..bb5567a --- /dev/null +++ b/tools/qml/texteditautoresizer_maemo5.h @@ -0,0 +1,113 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui/qplaintextedit.h> +#include <QtGui/qtextedit.h> +#include <QtGui/qabstractkineticscroller.h> +#include <QtGui/qscrollarea.h> +#include <QtDebug> + +#ifndef TEXTEDITAUTORESIZER_H +#define TEXTEDITAUTORESIZER_H + +class TextEditAutoResizer : public QObject +{ + Q_OBJECT +public: + TextEditAutoResizer(QWidget *parent) + : QObject(parent), plainTextEdit(qobject_cast<QPlainTextEdit *>(parent)), + textEdit(qobject_cast<QTextEdit *>(parent)), edit(qobject_cast<QFrame *>(parent)) + { + // parent must either inherit QPlainTextEdit or QTextEdit! + Q_ASSERT(plainTextEdit || textEdit); + + connect(parent, SIGNAL(textChanged()), this, SLOT(textEditChanged())); + connect(parent, SIGNAL(cursorPositionChanged()), this, SLOT(textEditChanged())); + + textEditChanged(); + } + +private Q_SLOTS: + inline void textEditChanged(); + +private: + QPlainTextEdit *plainTextEdit; + QTextEdit *textEdit; + QFrame *edit; +}; + +void TextEditAutoResizer::textEditChanged() +{ + QTextDocument *doc = textEdit ? textEdit->document() : plainTextEdit->document(); + QRect cursor = textEdit ? textEdit->cursorRect() : plainTextEdit->cursorRect(); + + QSize s = doc->size().toSize(); + if (plainTextEdit) + s.setHeight((s.height() + 2) * edit->fontMetrics().lineSpacing()); + + const QRect fr = edit->frameRect(); + const QRect cr = edit->contentsRect(); + + edit->setMinimumHeight(qMax(70, s.height() + (fr.height() - cr.height() - 1))); + + // make sure the cursor is visible in case we have a QAbstractScrollArea parent + QPoint pos = edit->pos(); + QWidget *pw = edit->parentWidget(); + while (pw) { + if (qobject_cast<QScrollArea *>(pw)) + break; + pw = pw->parentWidget(); + } + + if (pw) { + QScrollArea *area = static_cast<QScrollArea *>(pw); + QPoint scrollto = area->widget()->mapFrom(edit, cursor.center()); + QPoint margin(10 + cursor.width(), 2 * cursor.height()); + + if (QAbstractKineticScroller *scroller = area->property("kineticScroller").value<QAbstractKineticScroller *>()) { + scroller->ensureVisible(scrollto, margin.x(), margin.y()); + } else { + area->ensureVisible(scrollto.x(), scrollto.y(), margin.x(), margin.y()); + } + } +} + +#endif |