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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the Qt Designer of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "grid_p.h" |
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43 |
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44 #include <QtCore/QString> |
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45 #include <QtCore/QVector> |
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46 #include <QtGui/QPainter> |
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47 #include <QtGui/QWidget> |
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48 #include <QtGui/qevent.h> |
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49 |
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50 QT_BEGIN_NAMESPACE |
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51 |
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52 static const bool defaultSnap = true; |
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53 static const bool defaultVisible = true; |
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54 static const int DEFAULT_GRID = 10; |
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55 static const char* KEY_VISIBLE = "gridVisible"; |
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56 static const char* KEY_SNAPX = "gridSnapX"; |
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57 static const char* KEY_SNAPY = "gridSnapY"; |
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58 static const char* KEY_DELTAX = "gridDeltaX"; |
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59 static const char* KEY_DELTAY = "gridDeltaY"; |
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60 |
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61 // Insert a value into the serialization map unless default |
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62 template <class T> |
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63 static inline void valueToVariantMap(T value, T defaultValue, const QString &key, QVariantMap &v, bool forceKey) { |
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64 if (forceKey || value != defaultValue) |
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65 v.insert(key, QVariant(value)); |
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66 } |
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67 |
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68 // Obtain a value form QVariantMap |
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69 template <class T> |
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70 static inline bool valueFromVariantMap(const QVariantMap &v, const QString &key, T &value) { |
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71 const QVariantMap::const_iterator it = v.constFind(key); |
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72 const bool found = it != v.constEnd(); |
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73 if (found) |
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74 value = qVariantValue<T>(it.value()); |
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75 return found; |
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76 } |
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77 |
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78 namespace qdesigner_internal |
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79 { |
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80 |
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81 Grid::Grid() : |
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82 m_visible(defaultVisible), |
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83 m_snapX(defaultSnap), |
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84 m_snapY(defaultSnap), |
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85 m_deltaX(DEFAULT_GRID), |
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86 m_deltaY(DEFAULT_GRID) |
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87 { |
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88 } |
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89 |
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90 bool Grid::fromVariantMap(const QVariantMap& vm) |
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91 { |
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92 *this = Grid(); |
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93 valueFromVariantMap(vm, QLatin1String(KEY_VISIBLE), m_visible); |
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94 valueFromVariantMap(vm, QLatin1String(KEY_SNAPX), m_snapX); |
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95 valueFromVariantMap(vm, QLatin1String(KEY_SNAPY), m_snapY); |
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96 valueFromVariantMap(vm, QLatin1String(KEY_DELTAX), m_deltaX); |
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97 return valueFromVariantMap(vm, QLatin1String(KEY_DELTAY), m_deltaY); |
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98 } |
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99 |
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100 QVariantMap Grid::toVariantMap(bool forceKeys) const |
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101 { |
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102 QVariantMap rc; |
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103 addToVariantMap(rc, forceKeys); |
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104 return rc; |
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105 } |
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106 |
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107 void Grid::addToVariantMap(QVariantMap& vm, bool forceKeys) const |
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108 { |
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109 valueToVariantMap(m_visible, defaultVisible, QLatin1String(KEY_VISIBLE), vm, forceKeys); |
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110 valueToVariantMap(m_snapX, defaultSnap, QLatin1String(KEY_SNAPX), vm, forceKeys); |
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111 valueToVariantMap(m_snapY, defaultSnap, QLatin1String(KEY_SNAPY), vm, forceKeys); |
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112 valueToVariantMap(m_deltaX, DEFAULT_GRID, QLatin1String(KEY_DELTAX), vm, forceKeys); |
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113 valueToVariantMap(m_deltaY, DEFAULT_GRID, QLatin1String(KEY_DELTAY), vm, forceKeys); |
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114 } |
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115 |
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116 void Grid::paint(QWidget *widget, QPaintEvent *e) const |
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117 { |
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118 QPainter p(widget); |
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119 paint(p, widget, e); |
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120 } |
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121 |
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122 void Grid::paint(QPainter &p, const QWidget *widget, QPaintEvent *e) const |
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123 { |
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124 p.setPen(widget->palette().dark().color()); |
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125 |
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126 if (m_visible) { |
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127 const int xstart = (e->rect().x() / m_deltaX) * m_deltaX; |
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128 const int ystart = (e->rect().y() / m_deltaY) * m_deltaY; |
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129 |
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130 const int xend = e->rect().right(); |
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131 const int yend = e->rect().bottom(); |
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132 |
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133 typedef QVector<QPointF> Points; |
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134 static Points points; |
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135 points.clear(); |
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136 |
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137 for (int x = xstart; x <= xend; x += m_deltaX) { |
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138 points.reserve((yend - ystart) / m_deltaY + 1); |
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139 for (int y = ystart; y <= yend; y += m_deltaY) |
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140 points.push_back(QPointF(x, y)); |
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141 p.drawPoints( &(*points.begin()), points.count()); |
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142 points.clear(); |
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143 } |
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144 } |
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145 } |
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146 |
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147 int Grid::snapValue(int value, int grid) const |
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148 { |
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149 const int rest = value % grid; |
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150 const int absRest = (rest < 0) ? -rest : rest; |
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151 int offset = 0; |
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152 if (2 * absRest > grid) |
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153 offset = 1; |
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154 if (rest < 0) |
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155 offset *= -1; |
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156 return (value / grid + offset) * grid; |
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157 } |
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158 |
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159 QPoint Grid::snapPoint(const QPoint &p) const |
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160 { |
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161 const int sx = m_snapX ? snapValue(p.x(), m_deltaX) : p.x(); |
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162 const int sy = m_snapY ? snapValue(p.y(), m_deltaY) : p.y(); |
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163 return QPoint(sx, sy); |
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164 } |
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165 |
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166 int Grid::widgetHandleAdjustX(int x) const |
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167 { |
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168 return m_snapX ? (x / m_deltaX) * m_deltaX + 1 : x; |
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169 } |
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170 |
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171 int Grid::widgetHandleAdjustY(int y) const |
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172 { |
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173 return m_snapY ? (y / m_deltaY) * m_deltaY + 1 : y; |
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174 } |
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175 |
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176 bool Grid::equals(const Grid &rhs) const |
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177 { |
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178 return m_visible == rhs.m_visible && |
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179 m_snapX == rhs.m_snapX && |
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180 m_snapY == rhs.m_snapY && |
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181 m_deltaX == rhs.m_deltaX && |
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182 m_deltaY == rhs.m_deltaY; |
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183 } |
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184 } |
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185 |
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186 QT_END_NAMESPACE |