2011-04-27 10:05:43 +00:00
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/****************************************************************************
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**
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2015-01-28 08:44:43 +00:00
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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2011-04-27 10:05:43 +00:00
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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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2014-08-21 13:51:22 +00:00
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** $QT_BEGIN_LICENSE:LGPL21$
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2012-09-19 12:28:29 +00:00
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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2015-01-28 08:44:43 +00:00
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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2012-09-19 12:28:29 +00:00
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**
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2011-04-27 10:05:43 +00:00
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** GNU Lesser General Public License Usage
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2012-09-19 12:28:29 +00:00
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** Alternatively, this file may be used under the terms of the GNU Lesser
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2014-08-21 13:51:22 +00:00
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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2011-04-27 10:05:43 +00:00
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**
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2015-01-28 08:44:43 +00:00
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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2011-04-27 10:05:43 +00:00
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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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** $QT_END_LICENSE$
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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());
|
|
|
|
|
|
|
|
m_currentIndex = index;
|
|
|
|
|
|
|
|
if (m_currentIndex != -1) {
|
|
|
|
const Shape ¤t = m_shapeList.at(m_currentIndex);
|
|
|
|
update(current.rect());
|
|
|
|
currentName = current.name();
|
|
|
|
}
|
|
|
|
|
|
|
|
emit currentShapeChanged(currentName);
|
|
|
|
}
|
|
|
|
|
|
|
|
int Document::indexOf(const QString &shapeName) const
|
|
|
|
{
|
|
|
|
for (int i = 0; i < m_shapeList.count(); ++i) {
|
|
|
|
if (m_shapeList.at(i).name() == shapeName)
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
QString Document::uniqueName(const QString &name) const
|
|
|
|
{
|
|
|
|
QString unique;
|
|
|
|
|
|
|
|
for (int i = 0; ; ++i) {
|
|
|
|
unique = name;
|
|
|
|
if (i > 0)
|
|
|
|
unique += QString::number(i);
|
|
|
|
if (indexOf(unique) == -1)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return unique;
|
|
|
|
}
|
|
|
|
|
|
|
|
QString Document::currentShapeName() const
|
|
|
|
{
|
|
|
|
if (m_currentIndex == -1)
|
|
|
|
return QString();
|
|
|
|
return m_shapeList.at(m_currentIndex).name();
|
|
|
|
}
|
|
|
|
|