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1 /* |
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2 * Copyright (C) 2006 The Android Open Source Project |
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3 * |
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4 * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 * you may not use this file except in compliance with the License. |
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6 * You may obtain a copy of the License at |
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7 * |
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8 * http://www.apache.org/licenses/LICENSE-2.0 |
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9 * |
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10 * Unless required by applicable law or agreed to in writing, software |
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11 * distributed under the License is distributed on an "AS IS" BASIS, |
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 * See the License for the specific language governing permissions and |
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14 * limitations under the License. |
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15 */ |
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16 |
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17 #ifndef ANDROID_UI_RECT |
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18 #define ANDROID_UI_RECT |
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19 |
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20 #include <utils/TypeHelpers.h> |
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21 #include <ui/Point.h> |
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22 |
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23 #include <android/rect.h> |
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24 |
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25 namespace android { |
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26 |
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27 class Rect : public ARect |
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28 { |
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29 public: |
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30 typedef ARect::value_type value_type; |
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31 |
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32 // we don't provide copy-ctor and operator= on purpose |
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33 // because we want the compiler generated versions |
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34 |
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35 inline Rect() { |
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36 } |
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37 inline Rect(int32_t w, int32_t h) { |
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38 left = top = 0; right = w; bottom = h; |
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39 } |
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40 inline Rect(int32_t l, int32_t t, int32_t r, int32_t b) { |
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41 left = l; top = t; right = r; bottom = b; |
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42 } |
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43 inline Rect(const Point& lt, const Point& rb) { |
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44 left = lt.x; top = lt.y; right = rb.x; bottom = rb.y; |
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45 } |
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46 |
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47 void makeInvalid(); |
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48 |
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49 inline void clear() { |
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50 left = top = right = bottom = 0; |
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51 } |
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52 |
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53 // a valid rectangle has a non negative width and height |
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54 inline bool isValid() const { |
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55 return (width()>=0) && (height()>=0); |
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56 } |
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57 |
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58 // an empty rect has a zero width or height, or is invalid |
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59 inline bool isEmpty() const { |
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60 return (width()<=0) || (height()<=0); |
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61 } |
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62 |
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63 inline void set(const Rect& rhs) { |
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64 operator = (rhs); |
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65 } |
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66 |
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67 // rectangle's width |
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68 inline int32_t width() const { |
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69 return right-left; |
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70 } |
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71 |
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72 // rectangle's height |
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73 inline int32_t height() const { |
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74 return bottom-top; |
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75 } |
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76 |
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77 void setLeftTop(const Point& lt) { |
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78 left = lt.x; |
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79 top = lt.y; |
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80 } |
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81 |
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82 void setRightBottom(const Point& rb) { |
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83 right = rb.x; |
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84 bottom = rb.y; |
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85 } |
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86 |
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87 // the following 4 functions return the 4 corners of the rect as Point |
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88 Point leftTop() const { |
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89 return Point(left, top); |
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90 } |
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91 Point rightBottom() const { |
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92 return Point(right, bottom); |
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93 } |
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94 Point rightTop() const { |
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95 return Point(right, top); |
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96 } |
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97 Point leftBottom() const { |
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98 return Point(left, bottom); |
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99 } |
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100 |
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101 // comparisons |
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102 inline bool operator == (const Rect& rhs) const { |
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103 return (left == rhs.left) && (top == rhs.top) && |
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104 (right == rhs.right) && (bottom == rhs.bottom); |
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105 } |
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106 |
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107 inline bool operator != (const Rect& rhs) const { |
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108 return !operator == (rhs); |
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109 } |
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110 |
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111 // operator < defines an order which allows to use rectangles in sorted |
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112 // vectors. |
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113 bool operator < (const Rect& rhs) const; |
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114 |
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115 Rect& offsetToOrigin() { |
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116 right -= left; |
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117 bottom -= top; |
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118 left = top = 0; |
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119 return *this; |
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120 } |
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121 Rect& offsetTo(const Point& p) { |
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122 return offsetTo(p.x, p.y); |
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123 } |
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124 Rect& offsetBy(const Point& dp) { |
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125 return offsetBy(dp.x, dp.y); |
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126 } |
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127 Rect& operator += (const Point& rhs) { |
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128 return offsetBy(rhs.x, rhs.y); |
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129 } |
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130 Rect& operator -= (const Point& rhs) { |
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131 return offsetBy(-rhs.x, -rhs.y); |
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132 } |
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133 const Rect operator + (const Point& rhs) const; |
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134 const Rect operator - (const Point& rhs) const; |
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135 |
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136 void translate(int32_t dx, int32_t dy) { // legacy, don't use. |
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137 offsetBy(dx, dy); |
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138 } |
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139 |
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140 Rect& offsetTo(int32_t x, int32_t y); |
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141 Rect& offsetBy(int32_t x, int32_t y); |
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142 bool intersect(const Rect& with, Rect* result) const; |
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143 }; |
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144 |
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145 ANDROID_BASIC_TYPES_TRAITS(Rect) |
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146 |
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147 }; // namespace android |
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148 |
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149 #endif // ANDROID_UI_RECT |