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[FEATURE] Added font marker symbol layer
git-svn-id: http://svn.osgeo.org/qgis/trunk@12794 c8812cc2-4d05-0410-92ff-de0c093fc19c
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Jan 18, 2010
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/**************************************************************************** | ||
** | ||
** 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. | ||
** $QT_END_LICENSE$ | ||
** | ||
****************************************************************************/ | ||
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#include <QtGui> | ||
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#include "characterwidget.h" | ||
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//! [0] | ||
CharacterWidget::CharacterWidget( QWidget *parent ) | ||
: QWidget( parent ) | ||
{ | ||
squareSize = 24; | ||
columns = 16; | ||
lastKey = -1; | ||
setMouseTracking( true ); | ||
} | ||
//! [0] | ||
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//! [1] | ||
void CharacterWidget::updateFont( const QFont &font ) | ||
{ | ||
displayFont.setFamily( font.family() ); | ||
squareSize = qMax( 24, QFontMetrics( displayFont ).xHeight() * 3 ); | ||
adjustSize(); | ||
update(); | ||
} | ||
//! [1] | ||
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//! [2] | ||
void CharacterWidget::updateSize( double fontSize ) | ||
{ | ||
displayFont.setPointSizeF( fontSize ); | ||
squareSize = qMax( 24, QFontMetrics( displayFont ).xHeight() * 3 ); | ||
adjustSize(); | ||
update(); | ||
} | ||
//! [2] | ||
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void CharacterWidget::updateStyle( const QString &fontStyle ) | ||
{ | ||
QFontDatabase fontDatabase; | ||
const QFont::StyleStrategy oldStrategy = displayFont.styleStrategy(); | ||
displayFont = fontDatabase.font( displayFont.family(), fontStyle, displayFont.pointSize() ); | ||
displayFont.setStyleStrategy( oldStrategy ); | ||
squareSize = qMax( 24, QFontMetrics( displayFont ).xHeight() * 3 ); | ||
adjustSize(); | ||
update(); | ||
} | ||
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void CharacterWidget::updateFontMerging( bool enable ) | ||
{ | ||
if ( enable ) | ||
displayFont.setStyleStrategy( QFont::PreferDefault ); | ||
else | ||
displayFont.setStyleStrategy( QFont::NoFontMerging ); | ||
adjustSize(); | ||
update(); | ||
} | ||
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//! [3] | ||
QSize CharacterWidget::sizeHint() const | ||
{ | ||
return QSize( columns*squareSize, ( 65536 / columns )*squareSize ); | ||
} | ||
//! [3] | ||
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//! [4] | ||
void CharacterWidget::mouseMoveEvent( QMouseEvent *event ) | ||
{ | ||
QPoint widgetPosition = mapFromGlobal( event->globalPos() ); | ||
uint key = ( widgetPosition.y() / squareSize ) * columns + widgetPosition.x() / squareSize; | ||
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QString text = QString::fromLatin1( "<p>Character: <span style=\"font-size: 24pt; font-family: %1\">" ).arg( displayFont.family() ) | ||
+ QChar( key ) | ||
+ QString::fromLatin1( "</span><p>Value: 0x" ) | ||
+ QString::number( key, 16 ); | ||
QToolTip::showText( event->globalPos(), text, this ); | ||
} | ||
//! [4] | ||
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//! [5] | ||
void CharacterWidget::mousePressEvent( QMouseEvent *event ) | ||
{ | ||
if ( event->button() == Qt::LeftButton ) | ||
{ | ||
lastKey = ( event->y() / squareSize ) * columns + event->x() / squareSize; | ||
if ( QChar( lastKey ).category() != QChar::NoCategory ) | ||
emit characterSelected( QChar( lastKey ) ); | ||
update(); | ||
} | ||
else | ||
QWidget::mousePressEvent( event ); | ||
} | ||
//! [5] | ||
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//! [6] | ||
void CharacterWidget::paintEvent( QPaintEvent *event ) | ||
{ | ||
QPainter painter( this ); | ||
painter.fillRect( event->rect(), QBrush( Qt::white ) ); | ||
painter.setFont( displayFont ); | ||
//! [6] | ||
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//! [7] | ||
QRect redrawRect = event->rect(); | ||
int beginRow = redrawRect.top() / squareSize; | ||
int endRow = redrawRect.bottom() / squareSize; | ||
int beginColumn = redrawRect.left() / squareSize; | ||
int endColumn = redrawRect.right() / squareSize; | ||
//! [7] | ||
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//! [8] | ||
painter.setPen( QPen( Qt::gray ) ); | ||
for ( int row = beginRow; row <= endRow; ++row ) | ||
{ | ||
for ( int column = beginColumn; column <= endColumn; ++column ) | ||
{ | ||
painter.drawRect( column*squareSize, row*squareSize, squareSize, squareSize ); | ||
} | ||
//! [8] //! [9] | ||
} | ||
//! [9] | ||
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//! [10] | ||
QFontMetrics fontMetrics( displayFont ); | ||
painter.setPen( QPen( Qt::black ) ); | ||
for ( int row = beginRow; row <= endRow; ++row ) | ||
{ | ||
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for ( int column = beginColumn; column <= endColumn; ++column ) | ||
{ | ||
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int key = row * columns + column; | ||
painter.setClipRect( column*squareSize, row*squareSize, squareSize, squareSize ); | ||
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if ( key == lastKey ) | ||
painter.fillRect( column*squareSize + 1, row*squareSize + 1, squareSize, squareSize, QBrush( Qt::red ) ); | ||
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painter.drawText( column*squareSize + ( squareSize / 2 ) - fontMetrics.width( QChar( key ) ) / 2, | ||
row*squareSize + 4 + fontMetrics.ascent(), | ||
QString( QChar( key ) ) ); | ||
} | ||
} | ||
} | ||
//! [10] |
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