C++/Qt/QTextFrame — различия между версиями
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Версия 14:21, 25 мая 2010
QTextFrame based calendar
/****************************************************************************
**
** Copyright (C) 2009 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QDate>
#include <QMainWindow>
QT_BEGIN_NAMESPACE
class QTextBrowser;
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void setFontSize(int size);
void setMonth(int month);
void setYear(QDate date);
private:
void insertCalendar();
int fontSize;
QDate selectedDate;
QTextBrowser *editor;
};
#endif
#include <QtGui>
#include "mainwindow.h"
MainWindow::MainWindow()
{
selectedDate = QDate::currentDate();
fontSize = 10;
QWidget *centralWidget = new QWidget;
QLabel *dateLabel = new QLabel(tr("Date:"));
QComboBox *monthCombo = new QComboBox;
for (int month = 1; month <= 12; ++month)
monthCombo->addItem(QDate::longMonthName(month));
QDateTimeEdit *yearEdit = new QDateTimeEdit;
yearEdit->setDisplayFormat("yyyy");
yearEdit->setDateRange(QDate(1753, 1, 1), QDate(8000, 1, 1));
monthCombo->setCurrentIndex(selectedDate.month() - 1);
yearEdit->setDate(selectedDate);
QLabel *fontSizeLabel = new QLabel(tr("Font size:"));
QSpinBox *fontSizeSpinBox = new QSpinBox;
fontSizeSpinBox->setRange(1, 64);
fontSizeSpinBox->setValue(10);
editor = new QTextBrowser;
insertCalendar();
connect(monthCombo, SIGNAL(activated(int)), this, SLOT(setMonth(int)));
connect(yearEdit, SIGNAL(dateChanged(QDate)), this, SLOT(setYear(QDate)));
connect(fontSizeSpinBox, SIGNAL(valueChanged(int)),
this, SLOT(setFontSize(int)));
QHBoxLayout *controlsLayout = new QHBoxLayout;
controlsLayout->addWidget(dateLabel);
controlsLayout->addWidget(monthCombo);
controlsLayout->addWidget(yearEdit);
controlsLayout->addSpacing(24);
controlsLayout->addWidget(fontSizeLabel);
controlsLayout->addWidget(fontSizeSpinBox);
controlsLayout->addStretch(1);
QVBoxLayout *centralLayout = new QVBoxLayout;
centralLayout->addLayout(controlsLayout);
centralLayout->addWidget(editor, 1);
centralWidget->setLayout(centralLayout);
setCentralWidget(centralWidget);
}
void MainWindow::insertCalendar()
{
editor->clear();
QTextCursor cursor = editor->textCursor();
cursor.beginEditBlock();
QDate date(selectedDate.year(), selectedDate.month(), 1);
QTextTableFormat tableFormat;
tableFormat.setAlignment(Qt::AlignHCenter);
tableFormat.setBackground(QColor("#e0e0e0"));
tableFormat.setCellPadding(2);
tableFormat.setCellSpacing(4);
QVector<QTextLength> constraints;
constraints << QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14)
<< QTextLength(QTextLength::PercentageLength, 14);
tableFormat.setColumnWidthConstraints(constraints);
QTextTable *table = cursor.insertTable(1, 7, tableFormat);
QTextFrame *frame = cursor.currentFrame();
QTextFrameFormat frameFormat = frame->frameFormat();
frameFormat.setBorder(1);
frame->setFrameFormat(frameFormat);
QTextCharFormat format = cursor.charFormat();
format.setFontPointSize(fontSize);
QTextCharFormat boldFormat = format;
boldFormat.setFontWeight(QFont::Bold);
QTextCharFormat highlightedFormat = boldFormat;
highlightedFormat.setBackground(Qt::yellow);
for (int weekDay = 1; weekDay <= 7; ++weekDay) {
QTextTableCell cell = table->cellAt(0, weekDay-1);
QTextCursor cellCursor = cell.firstCursorPosition();
cellCursor.insertText(QString("%1").arg(QDate::longDayName(weekDay)),
boldFormat);
}
table->insertRows(table->rows(), 1);
while (date.month() == selectedDate.month()) {
int weekDay = date.dayOfWeek();
QTextTableCell cell = table->cellAt(table->rows()-1, weekDay-1);
QTextCursor cellCursor = cell.firstCursorPosition();
if (date == QDate::currentDate())
cellCursor.insertText(QString("%1").arg(date.day()), highlightedFormat);
else
cellCursor.insertText(QString("%1").arg(date.day()), format);
date = date.addDays(1);
if (weekDay == 7 && date.month() == selectedDate.month())
table->insertRows(table->rows(), 1);
}
cursor.endEditBlock();
setWindowTitle(tr("Calendar for %1 %2"
).arg(QDate::longMonthName(selectedDate.month())
).arg(selectedDate.year()));
}
void MainWindow::setFontSize(int size)
{
fontSize = size;
insertCalendar();
}
void MainWindow::setMonth(int month)
{
selectedDate = QDate(selectedDate.year(), month + 1, selectedDate.day());
insertCalendar();
}
void MainWindow::setYear(QDate date)
{
selectedDate = QDate(date.year(), selectedDate.month(), selectedDate.day());
insertCalendar();
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow window;
window.resize(640, 256);
window.show();
return app.exec();
}
Using QTextFrame
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef XMLWRITER_H
#define XMLWRITER_H
#include <QDomDocument>
class QTextDocument;
class XmlWriter
{
public:
XmlWriter(QTextDocument *document) : textDocument(document) {}
QDomDocument *toXml();
private:
void processBlock(QDomElement &parent, const QTextBlock &block);
void processFrame(QDomElement &parent, QTextFrame *frame);
QDomDocument *document;
QTextDocument *textDocument;
};
#endif
#include <QtGui>
#include "xmlwriter.h"
QDomDocument *XmlWriter::toXml()
{
QDomImplementation implementation;
QDomDocumentType docType = implementation.createDocumentType(
"scribe-document", "scribe", "qt,nokia.com/scribe");
document = new QDomDocument(docType);
// ### This processing instruction is required to ensure that any kind
// of encoding is given when the document is written.
QDomProcessingInstruction process = document->createProcessingInstruction(
"xml", "version=\"1.0\" encoding=\"utf-8\"");
document->appendChild(process);
QDomElement documentElement = document->createElement("document");
document->appendChild(documentElement);
QTextFrame *root = textDocument->rootFrame();
if (root)
processFrame(documentElement, root);
return document;
}
void XmlWriter::processBlock(QDomElement &parent, const QTextBlock &block)
{
QDomElement blockElement = document->createElement("block");
blockElement.setAttribute("position", block.position());
blockElement.setAttribute("length", block.length());
parent.appendChild(blockElement);
QTextBlock::iterator it;
for (it = block.begin(); !(it.atEnd()); ++it) {
QTextFragment fragment = it.fragment();
if (fragment.isValid()) {
QDomElement fragmentElement = document->createElement("fragment");
blockElement.appendChild(fragmentElement);
fragmentElement.setAttribute("length", fragment.length());
QDomText fragmentText = document->createTextNode(fragment.text());
fragmentElement.appendChild(fragmentText);
}
}
}
void XmlWriter::processFrame(QDomElement &parent, QTextFrame *frame)
{
QDomElement frameElement = document->createElement("frame");
frameElement.setAttribute("begin", frame->firstPosition());
frameElement.setAttribute("end", frame->lastPosition());
parent.appendChild(frameElement);
QTextFrame::iterator it;
for (it = frame->begin(); !(it.atEnd()); ++it) {
QTextFrame *childFrame = it.currentFrame();
QTextBlock childBlock = it.currentBlock();
if (childFrame)
processFrame(frameElement, childFrame);
else if (childBlock.isValid())
processBlock(frameElement, childBlock);
}
}
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QTextEdit;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void saveFile();
private:
bool writeXml(const QString &fileName);
QTextEdit *editor;
};
#endif
#include <QtGui>
#include "mainwindow.h"
#include "xmlwriter.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"));
QAction *saveAction = fileMenu->addAction(tr("&Save..."));
saveAction->setShortcut(tr("Ctrl+S"));
QAction *quitAction = fileMenu->addAction(tr("E&xit"));
quitAction->setShortcut(tr("Ctrl+Q"));
menuBar()->addMenu(fileMenu);
editor = new QTextEdit();
QTextCursor cursor(editor->textCursor());
cursor.movePosition(QTextCursor::Start);
QTextFrame *mainFrame = cursor.currentFrame();
QTextCharFormat plainCharFormat;
QTextCharFormat boldCharFormat;
boldCharFormat.setFontWeight(QFont::Bold);
/* main frame
QTextFrame *mainFrame = cursor.currentFrame();
cursor.insertText(...);
*/
cursor.insertText("Text documents are represented by the "
"QTextDocument class, rather than by QString objects. "
"Each QTextDocument object contains information about "
"the document"s internal representation, its structure, "
"and keeps track of modifications to provide undo/redo "
"facilities. This approach allows features such as the "
"layout management to be delegated to specialized "
"classes, but also provides a focus for the framework.",
plainCharFormat);
QTextFrameFormat frameFormat;
frameFormat.setMargin(32);
frameFormat.setPadding(8);
frameFormat.setBorder(4);
cursor.insertFrame(frameFormat);
/* insert frame
cursor.insertFrame(frameFormat);
cursor.insertText(...);
*/
cursor.insertText("Documents are either converted from external sources "
"or created from scratch using Qt. The creation process "
"can done by an editor widget, such as QTextEdit, or by "
"explicit calls to the Scribe API.", boldCharFormat);
cursor = mainFrame->lastCursorPosition();
/* last cursor
cursor = mainFrame->lastCursorPosition();
cursor.insertText(...);
*/
cursor.insertText("There are two complementary ways to visualize the "
"contents of a document: as a linear buffer that is "
"used by editors to modify the contents, and as an "
"object hierarchy containing structural information "
"that is useful to layout engines. In the hierarchical "
"model, the objects generally correspond to visual "
"elements such as frames, tables, and lists. At a lower "
"level, these elements describe properties such as the "
"style of text used and its alignment. The linear "
"representation of the document is used for editing and "
"manipulation of the document"s contents.",
plainCharFormat);
connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
setCentralWidget(editor);
setWindowTitle(tr("Text Document Frames"));
}
void MainWindow::saveFile()
{
QString fileName = QFileDialog::getSaveFileName(this,
tr("Save document as:"), "", tr("XML (*.xml)"));
if (!fileName.isEmpty()) {
if (writeXml(fileName))
setWindowTitle(fileName);
else
QMessageBox::warning(this, tr("Warning"),
tr("Failed to save the document."), QMessageBox::Cancel,
QMessageBox::NoButton);
}
}
bool MainWindow::writeXml(const QString &fileName)
{
XmlWriter documentWriter(editor->document());
QDomDocument *domDocument = documentWriter.toXml();
QFile file(fileName);
if (file.open(QFile::WriteOnly)) {
QTextStream textStream(&file);
textStream.setCodec(QTextCodec::codecForName("UTF-8"));
textStream << domDocument->toString(1).toUtf8();
file.close();
return true;
}
else
return false;
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->resize(480, 480);
window->show();
return app.exec();
}