| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the Qt Designer of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "grid_p.h" |
| |
| #include <QtCore/QString> |
| #include <QtCore/QVector> |
| #include <QtGui/QPainter> |
| #include <QtGui/QWidget> |
| #include <QtGui/qevent.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| static const bool defaultSnap = true; |
| static const bool defaultVisible = true; |
| static const int DEFAULT_GRID = 10; |
| static const char* KEY_VISIBLE = "gridVisible"; |
| static const char* KEY_SNAPX = "gridSnapX"; |
| static const char* KEY_SNAPY = "gridSnapY"; |
| static const char* KEY_DELTAX = "gridDeltaX"; |
| static const char* KEY_DELTAY = "gridDeltaY"; |
| |
| // Insert a value into the serialization map unless default |
| template <class T> |
| static inline void valueToVariantMap(T value, T defaultValue, const QString &key, QVariantMap &v, bool forceKey) { |
| if (forceKey || value != defaultValue) |
| v.insert(key, QVariant(value)); |
| } |
| |
| // Obtain a value form QVariantMap |
| template <class T> |
| static inline bool valueFromVariantMap(const QVariantMap &v, const QString &key, T &value) { |
| const QVariantMap::const_iterator it = v.constFind(key); |
| const bool found = it != v.constEnd(); |
| if (found) |
| value = qVariantValue<T>(it.value()); |
| return found; |
| } |
| |
| namespace qdesigner_internal |
| { |
| |
| Grid::Grid() : |
| m_visible(defaultVisible), |
| m_snapX(defaultSnap), |
| m_snapY(defaultSnap), |
| m_deltaX(DEFAULT_GRID), |
| m_deltaY(DEFAULT_GRID) |
| { |
| } |
| |
| bool Grid::fromVariantMap(const QVariantMap& vm) |
| { |
| *this = Grid(); |
| valueFromVariantMap(vm, QLatin1String(KEY_VISIBLE), m_visible); |
| valueFromVariantMap(vm, QLatin1String(KEY_SNAPX), m_snapX); |
| valueFromVariantMap(vm, QLatin1String(KEY_SNAPY), m_snapY); |
| valueFromVariantMap(vm, QLatin1String(KEY_DELTAX), m_deltaX); |
| return valueFromVariantMap(vm, QLatin1String(KEY_DELTAY), m_deltaY); |
| } |
| |
| QVariantMap Grid::toVariantMap(bool forceKeys) const |
| { |
| QVariantMap rc; |
| addToVariantMap(rc, forceKeys); |
| return rc; |
| } |
| |
| void Grid::addToVariantMap(QVariantMap& vm, bool forceKeys) const |
| { |
| valueToVariantMap(m_visible, defaultVisible, QLatin1String(KEY_VISIBLE), vm, forceKeys); |
| valueToVariantMap(m_snapX, defaultSnap, QLatin1String(KEY_SNAPX), vm, forceKeys); |
| valueToVariantMap(m_snapY, defaultSnap, QLatin1String(KEY_SNAPY), vm, forceKeys); |
| valueToVariantMap(m_deltaX, DEFAULT_GRID, QLatin1String(KEY_DELTAX), vm, forceKeys); |
| valueToVariantMap(m_deltaY, DEFAULT_GRID, QLatin1String(KEY_DELTAY), vm, forceKeys); |
| } |
| |
| void Grid::paint(QWidget *widget, QPaintEvent *e) const |
| { |
| QPainter p(widget); |
| paint(p, widget, e); |
| } |
| |
| void Grid::paint(QPainter &p, const QWidget *widget, QPaintEvent *e) const |
| { |
| p.setPen(widget->palette().dark().color()); |
| |
| if (m_visible) { |
| const int xstart = (e->rect().x() / m_deltaX) * m_deltaX; |
| const int ystart = (e->rect().y() / m_deltaY) * m_deltaY; |
| |
| const int xend = e->rect().right(); |
| const int yend = e->rect().bottom(); |
| |
| typedef QVector<QPointF> Points; |
| static Points points; |
| points.clear(); |
| |
| for (int x = xstart; x <= xend; x += m_deltaX) { |
| points.reserve((yend - ystart) / m_deltaY + 1); |
| for (int y = ystart; y <= yend; y += m_deltaY) |
| points.push_back(QPointF(x, y)); |
| p.drawPoints( &(*points.begin()), points.count()); |
| points.clear(); |
| } |
| } |
| } |
| |
| int Grid::snapValue(int value, int grid) const |
| { |
| const int rest = value % grid; |
| const int absRest = (rest < 0) ? -rest : rest; |
| int offset = 0; |
| if (2 * absRest > grid) |
| offset = 1; |
| if (rest < 0) |
| offset *= -1; |
| return (value / grid + offset) * grid; |
| } |
| |
| QPoint Grid::snapPoint(const QPoint &p) const |
| { |
| const int sx = m_snapX ? snapValue(p.x(), m_deltaX) : p.x(); |
| const int sy = m_snapY ? snapValue(p.y(), m_deltaY) : p.y(); |
| return QPoint(sx, sy); |
| } |
| |
| int Grid::widgetHandleAdjustX(int x) const |
| { |
| return m_snapX ? (x / m_deltaX) * m_deltaX + 1 : x; |
| } |
| |
| int Grid::widgetHandleAdjustY(int y) const |
| { |
| return m_snapY ? (y / m_deltaY) * m_deltaY + 1 : y; |
| } |
| |
| bool Grid::equals(const Grid &rhs) const |
| { |
| return m_visible == rhs.m_visible && |
| m_snapX == rhs.m_snapX && |
| m_snapY == rhs.m_snapY && |
| m_deltaX == rhs.m_deltaX && |
| m_deltaY == rhs.m_deltaY; |
| } |
| } |
| |
| QT_END_NAMESPACE |