Long live Qt 4.5!

1 files changed, 186 insertions, 0 deletions

diff --git a/tools/designer/src/lib/shared/grid.cpp b/tools/designer/src/lib/shared/grid.cpp
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+++ b/tools/designer/src/lib/shared/grid.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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