1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 = qvariant_cast<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)
{
Grid grid;
bool anyData = valueFromVariantMap(vm, QLatin1String(KEY_VISIBLE), grid.m_visible);
anyData |= valueFromVariantMap(vm, QLatin1String(KEY_SNAPX), grid.m_snapX);
anyData |= valueFromVariantMap(vm, QLatin1String(KEY_SNAPY), grid.m_snapY);
anyData |= valueFromVariantMap(vm, QLatin1String(KEY_DELTAX), grid.m_deltaX);
anyData |= valueFromVariantMap(vm, QLatin1String(KEY_DELTAY), grid.m_deltaY);
if (!anyData)
return false;
if (grid.m_deltaX == 0 || grid.m_deltaY == 0) {
qWarning("Attempt to set invalid grid with a spacing of 0.");
return false;
}
*this = grid;
return true;
}
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
|
