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1 #include <math.h> |
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2 |
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3 #include <QPainter> |
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4 #include <QGradient> |
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5 #include <QPaintDevice> |
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6 #include <QTimer> |
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7 |
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8 #include "LED.h" |
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9 |
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10 LED:: |
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11 LED(QWidget* parent) : |
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12 QWidget(parent), |
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13 diameter_(5), |
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14 color_(QColor("red")), |
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15 alignment_(Qt::AlignCenter), |
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16 initialState_(true), |
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17 state_(true), |
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18 flashRate_(200), |
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19 flashing_(false) |
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20 { |
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21 timer_ = new QTimer(this); |
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22 connect(timer_, SIGNAL(timeout()), this, SLOT(toggleState())); |
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23 |
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24 setDiameter(diameter_); |
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25 } |
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26 |
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27 LED:: |
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28 ~LED() |
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29 { |
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30 } |
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31 |
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32 |
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33 double LED:: |
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34 diameter() const |
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35 { |
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36 return diameter_; |
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37 } |
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38 |
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39 void LED:: |
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40 setDiameter(double diameter) |
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41 { |
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42 diameter_ = diameter; |
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43 |
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44 pixX_ = round(double(height())/heightMM()); |
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45 pixY_ = round(double(width())/widthMM()); |
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46 |
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47 diamX_ = diameter_*pixX_; |
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48 diamY_ = diameter_*pixY_; |
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49 |
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50 update(); |
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51 } |
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52 |
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53 |
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54 QColor LED:: |
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55 color() const |
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56 { |
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57 return color_; |
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58 } |
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59 |
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60 void LED:: |
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61 setColor(const QColor& color) |
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62 { |
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63 color_ = color; |
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64 update(); |
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65 } |
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66 |
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67 Qt::Alignment LED:: |
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68 alignment() const |
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69 { |
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70 return alignment_; |
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71 } |
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72 |
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73 void LED:: |
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74 setAlignment(Qt::Alignment alignment) |
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75 { |
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76 alignment_ = alignment; |
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77 |
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78 update(); |
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79 } |
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80 |
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81 void LED:: |
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82 setFlashRate(int rate) |
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83 { |
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84 flashRate_ = rate; |
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85 |
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86 update(); |
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87 } |
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88 |
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89 void LED:: |
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90 setFlashing(bool flashing) |
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91 { |
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92 flashing_ = flashing; |
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93 |
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94 update(); |
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95 } |
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96 |
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97 void LED:: |
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98 startFlashing() |
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99 { |
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100 setFlashing(true); |
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101 } |
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102 |
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103 void LED:: |
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104 stopFlashing() |
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105 { |
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106 setFlashing(false); |
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107 } |
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108 |
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109 |
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110 void LED:: |
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111 setState(bool state) |
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112 { |
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113 state_ = state; |
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114 update(); |
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115 } |
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116 |
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117 void LED:: |
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118 toggleState() |
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119 { |
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120 state_ = !state_; |
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121 update(); |
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122 } |
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123 |
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124 int LED:: |
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125 heightForWidth(int width) const |
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126 { |
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127 return width; |
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128 } |
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129 |
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130 QSize LED:: |
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131 sizeHint() const |
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132 { |
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133 return QSize(diamX_, diamY_); |
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134 } |
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135 |
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136 QSize LED:: |
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137 minimumSizeHint() const |
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138 { |
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139 return QSize(diamX_, diamY_); |
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140 } |
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141 |
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142 void LED:: |
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143 paintEvent(QPaintEvent *event) |
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144 { |
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145 Q_UNUSED(event); |
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146 |
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147 QPainter p(this); |
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148 |
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149 QRect geo = geometry(); |
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150 int width = geo.width(); |
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151 int height = geo.height(); |
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152 |
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153 int x=0, y=0; |
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154 if ( alignment_ & Qt::AlignLeft ) |
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155 x = 0; |
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156 else if ( alignment_ & Qt::AlignRight ) |
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157 x = width-diamX_; |
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158 else if ( alignment_ & Qt::AlignHCenter ) |
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159 x = (width-diamX_)/2; |
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160 else if ( alignment_ & Qt::AlignJustify ) |
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161 x = 0; |
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162 |
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163 if ( alignment_ & Qt::AlignTop ) |
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164 y = 0; |
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165 else if ( alignment_ & Qt::AlignBottom ) |
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166 y = height-diamY_; |
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167 else if ( alignment_ & Qt::AlignVCenter ) |
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168 y = (height-diamY_)/2; |
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169 |
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170 QRadialGradient g(x+diamX_/2, y+diamY_/2, diamX_*0.4, |
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171 diamX_*0.4, diamY_*0.4); |
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172 |
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173 g.setColorAt(0, Qt::white); |
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174 if ( state_ ) |
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175 g.setColorAt(1, color_); |
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176 else |
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177 g.setColorAt(1, Qt::black); |
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178 QBrush brush(g); |
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179 |
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180 p.setPen(color_); |
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181 p.setRenderHint(QPainter::Antialiasing, true); |
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182 p.setBrush(brush); |
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183 p.drawEllipse(x, y, diamX_-1, diamY_-1); |
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184 |
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185 if ( flashRate_ > 0 && flashing_ ) |
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186 timer_->start(flashRate_); |
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187 else |
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188 timer_->stop(); |
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189 } |
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190 |
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191 bool LED:: |
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192 state() const |
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193 { |
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194 return state_; |
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195 } |
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196 |
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197 bool LED:: |
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198 isFlashing() const |
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199 { |
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200 return flashing_; |
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201 } |
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202 |
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203 int LED:: |
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204 flashRate() const |
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205 { |
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206 return flashRate_; |
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207 } |