5635823e17
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I311e001373776812699d6efc045b5f742890c689 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
446 lines
11 KiB
C++
446 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <qevent.h>
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#include <QPainter>
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#include <QTextStream>
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#include <QUndoStack>
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#include "document.h"
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#include "commands.h"
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static const int resizeHandleWidth = 6;
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/******************************************************************************
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** Shape
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*/
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const QSize Shape::minSize(80, 50);
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Shape::Shape(Type type, const QColor &color, const QRect &rect)
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: m_type(type), m_rect(rect), m_color(color)
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{
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}
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Shape::Type Shape::type() const
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{
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return m_type;
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}
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QRect Shape::rect() const
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{
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return m_rect;
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}
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QColor Shape::color() const
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{
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return m_color;
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}
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QString Shape::name() const
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{
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return m_name;
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}
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QRect Shape::resizeHandle() const
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{
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QPoint br = m_rect.bottomRight();
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return QRect(br - QPoint(resizeHandleWidth, resizeHandleWidth), br);
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}
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QString Shape::typeToString(Type type)
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{
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QString result;
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switch (type) {
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case Rectangle:
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result = QLatin1String("Rectangle");
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break;
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case Circle:
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result = QLatin1String("Circle");
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break;
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case Triangle:
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result = QLatin1String("Triangle");
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break;
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}
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return result;
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}
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Shape::Type Shape::stringToType(const QString &s, bool *ok)
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{
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if (ok != 0)
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*ok = true;
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if (s == QLatin1String("Rectangle"))
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return Rectangle;
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if (s == QLatin1String("Circle"))
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return Circle;
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if (s == QLatin1String("Triangle"))
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return Triangle;
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if (ok != 0)
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*ok = false;
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return Rectangle;
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}
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/******************************************************************************
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** Document
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*/
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Document::Document(QWidget *parent)
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: QWidget(parent), m_currentIndex(-1), m_mousePressIndex(-1), m_resizeHandlePressed(false)
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{
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m_undoStack = new QUndoStack(this);
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setAutoFillBackground(true);
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setBackgroundRole(QPalette::Base);
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QPalette pal = palette();
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pal.setBrush(QPalette::Base, QPixmap(":/icons/background.png"));
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pal.setColor(QPalette::HighlightedText, Qt::red);
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setPalette(pal);
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}
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QString Document::addShape(const Shape &shape)
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{
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QString name = Shape::typeToString(shape.type());
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name = uniqueName(name);
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m_shapeList.append(shape);
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m_shapeList[m_shapeList.count() - 1].m_name = name;
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setCurrentShape(m_shapeList.count() - 1);
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return name;
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}
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void Document::deleteShape(const QString &shapeName)
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{
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int index = indexOf(shapeName);
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if (index == -1)
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return;
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update(m_shapeList.at(index).rect());
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m_shapeList.removeAt(index);
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if (index <= m_currentIndex) {
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m_currentIndex = -1;
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if (index == m_shapeList.count())
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--index;
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setCurrentShape(index);
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}
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}
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Shape Document::shape(const QString &shapeName) const
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{
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int index = indexOf(shapeName);
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if (index == -1)
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return Shape();
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return m_shapeList.at(index);
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}
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void Document::setShapeRect(const QString &shapeName, const QRect &rect)
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{
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int index = indexOf(shapeName);
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if (index == -1)
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return;
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Shape &shape = m_shapeList[index];
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update(shape.rect());
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update(rect);
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shape.m_rect = rect;
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}
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void Document::setShapeColor(const QString &shapeName, const QColor &color)
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{
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int index = indexOf(shapeName);
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if (index == -1)
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return;
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Shape &shape = m_shapeList[index];
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shape.m_color = color;
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update(shape.rect());
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}
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QUndoStack *Document::undoStack() const
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{
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return m_undoStack;
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}
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bool Document::load(QTextStream &stream)
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{
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m_shapeList.clear();
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while (!stream.atEnd()) {
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QString shapeType, shapeName, colorName;
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int left, top, width, height;
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stream >> shapeType >> shapeName >> colorName >> left >> top >> width >> height;
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if (stream.status() != QTextStream::Ok)
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return false;
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bool ok;
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Shape::Type type = Shape::stringToType(shapeType, &ok);
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if (!ok)
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return false;
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QColor color(colorName);
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if (!color.isValid())
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return false;
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Shape shape(type);
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shape.m_name = shapeName;
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shape.m_color = color;
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shape.m_rect = QRect(left, top, width, height);
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m_shapeList.append(shape);
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}
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m_currentIndex = m_shapeList.isEmpty() ? -1 : 0;
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return true;
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}
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void Document::save(QTextStream &stream)
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{
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for (int i = 0; i < m_shapeList.count(); ++i) {
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const Shape &shape = m_shapeList.at(i);
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QRect r = shape.rect();
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stream << Shape::typeToString(shape.type()) << QLatin1Char(' ')
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<< shape.name() << QLatin1Char(' ')
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<< shape.color().name() << QLatin1Char(' ')
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<< r.left() << QLatin1Char(' ')
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<< r.top() << QLatin1Char(' ')
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<< r.width() << QLatin1Char(' ')
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<< r.height();
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if (i != m_shapeList.count() - 1)
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stream << QLatin1Char('\n');
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}
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m_undoStack->setClean();
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}
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QString Document::fileName() const
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{
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return m_fileName;
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}
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void Document::setFileName(const QString &fileName)
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{
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m_fileName = fileName;
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}
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int Document::indexAt(const QPoint &pos) const
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{
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for (int i = m_shapeList.count() - 1; i >= 0; --i) {
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if (m_shapeList.at(i).rect().contains(pos))
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return i;
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}
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return -1;
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}
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void Document::mousePressEvent(QMouseEvent *event)
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{
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event->accept();
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int index = indexAt(event->pos());;
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if (index != -1) {
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setCurrentShape(index);
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const Shape &shape = m_shapeList.at(index);
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m_resizeHandlePressed = shape.resizeHandle().contains(event->pos());
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if (m_resizeHandlePressed)
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m_mousePressOffset = shape.rect().bottomRight() - event->pos();
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else
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m_mousePressOffset = event->pos() - shape.rect().topLeft();
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}
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m_mousePressIndex = index;
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}
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void Document::mouseReleaseEvent(QMouseEvent *event)
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{
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event->accept();
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m_mousePressIndex = -1;
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}
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void Document::mouseMoveEvent(QMouseEvent *event)
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{
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event->accept();
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if (m_mousePressIndex == -1)
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return;
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const Shape &shape = m_shapeList.at(m_mousePressIndex);
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QRect rect;
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if (m_resizeHandlePressed) {
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rect = QRect(shape.rect().topLeft(), event->pos() + m_mousePressOffset);
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} else {
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rect = shape.rect();
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rect.moveTopLeft(event->pos() - m_mousePressOffset);
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}
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QSize size = rect.size().expandedTo(Shape::minSize);
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rect.setSize(size);
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m_undoStack->push(new SetShapeRectCommand(this, shape.name(), rect));
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}
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static QGradient gradient(const QColor &color, const QRect &rect)
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{
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QColor c = color;
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c.setAlpha(160);
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QLinearGradient result(rect.topLeft(), rect.bottomRight());
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result.setColorAt(0, c.dark(150));
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result.setColorAt(0.5, c.light(200));
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result.setColorAt(1, c.dark(150));
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return result;
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}
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static QPolygon triangle(const QRect &rect)
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{
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QPolygon result(3);
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result.setPoint(0, rect.center().x(), rect.top());
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result.setPoint(1, rect.right(), rect.bottom());
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result.setPoint(2, rect.left(), rect.bottom());
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return result;
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}
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void Document::paintEvent(QPaintEvent *event)
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{
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QRegion paintRegion = event->region();
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QPainter painter(this);
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QPalette pal = palette();
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for (int i = 0; i < m_shapeList.count(); ++i) {
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const Shape &shape = m_shapeList.at(i);
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if (!paintRegion.contains(shape.rect()))
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continue;
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QPen pen = pal.text().color();
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pen.setWidth(i == m_currentIndex ? 2 : 1);
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painter.setPen(pen);
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painter.setBrush(gradient(shape.color(), shape.rect()));
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QRect rect = shape.rect();
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rect.adjust(1, 1, -resizeHandleWidth/2, -resizeHandleWidth/2);
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// paint the shape
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switch (shape.type()) {
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case Shape::Rectangle:
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painter.drawRect(rect);
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break;
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case Shape::Circle:
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painter.setRenderHint(QPainter::Antialiasing);
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painter.drawEllipse(rect);
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painter.setRenderHint(QPainter::Antialiasing, false);
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break;
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case Shape::Triangle:
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painter.setRenderHint(QPainter::Antialiasing);
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painter.drawPolygon(triangle(rect));
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painter.setRenderHint(QPainter::Antialiasing, false);
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break;
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}
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// paint the resize handle
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painter.setPen(pal.text().color());
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painter.setBrush(Qt::white);
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painter.drawRect(shape.resizeHandle().adjusted(0, 0, -1, -1));
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// paint the shape name
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painter.setBrush(pal.text());
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if (shape.type() == Shape::Triangle)
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rect.adjust(0, rect.height()/2, 0, 0);
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painter.drawText(rect, Qt::AlignCenter, shape.name());
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}
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}
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void Document::setCurrentShape(int index)
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{
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QString currentName;
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if (m_currentIndex != -1)
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update(m_shapeList.at(m_currentIndex).rect());
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m_currentIndex = index;
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if (m_currentIndex != -1) {
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const Shape ¤t = m_shapeList.at(m_currentIndex);
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update(current.rect());
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currentName = current.name();
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}
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emit currentShapeChanged(currentName);
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}
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int Document::indexOf(const QString &shapeName) const
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{
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for (int i = 0; i < m_shapeList.count(); ++i) {
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if (m_shapeList.at(i).name() == shapeName)
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return i;
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}
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return -1;
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}
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QString Document::uniqueName(const QString &name) const
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{
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QString unique;
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for (int i = 0; ; ++i) {
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unique = name;
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if (i > 0)
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unique += QString::number(i);
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if (indexOf(unique) == -1)
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break;
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}
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return unique;
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}
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QString Document::currentShapeName() const
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{
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if (m_currentIndex == -1)
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return QString();
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return m_shapeList.at(m_currentIndex).name();
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}
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