1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_UI_RECT 18 #define ANDROID_UI_RECT 19 20 #include <utils/TypeHelpers.h> 21 #include <ui/Point.h> 22 23 namespace android { 24 25 class Rect 26 { 27 public: 28 int left; 29 int top; 30 int right; 31 int bottom; 32 33 typedef int value_type; 34 35 // we don't provide copy-ctor and operator= on purpose 36 // because we want the compiler generated versions 37 Rect()38 inline Rect() { 39 } Rect(int w,int h)40 inline Rect(int w, int h) 41 : left(0), top(0), right(w), bottom(h) { 42 } Rect(int l,int t,int r,int b)43 inline Rect(int l, int t, int r, int b) 44 : left(l), top(t), right(r), bottom(b) { 45 } Rect(const Point & lt,const Point & rb)46 inline Rect(const Point& lt, const Point& rb) 47 : left(lt.x), top(lt.y), right(rb.x), bottom(rb.y) { 48 } 49 50 void makeInvalid(); 51 clear()52 inline void clear() { 53 left = top = right = bottom = 0; 54 } 55 56 // a valid rectangle has a non negative width and height isValid()57 inline bool isValid() const { 58 return (width()>=0) && (height()>=0); 59 } 60 61 // an empty rect has a zero width or height, or is invalid isEmpty()62 inline bool isEmpty() const { 63 return (width()<=0) || (height()<=0); 64 } 65 set(const Rect & rhs)66 inline void set(const Rect& rhs) { 67 operator = (rhs); 68 } 69 70 // rectangle's width width()71 inline int width() const { 72 return right-left; 73 } 74 75 // rectangle's height height()76 inline int height() const { 77 return bottom-top; 78 } 79 setLeftTop(const Point & lt)80 void setLeftTop(const Point& lt) { 81 left = lt.x; 82 top = lt.y; 83 } 84 setRightBottom(const Point & rb)85 void setRightBottom(const Point& rb) { 86 right = rb.x; 87 bottom = rb.y; 88 } 89 90 // the following 4 functions return the 4 corners of the rect as Point leftTop()91 Point leftTop() const { 92 return Point(left, top); 93 } rightBottom()94 Point rightBottom() const { 95 return Point(right, bottom); 96 } rightTop()97 Point rightTop() const { 98 return Point(right, top); 99 } leftBottom()100 Point leftBottom() const { 101 return Point(left, bottom); 102 } 103 104 // comparisons 105 inline bool operator == (const Rect& rhs) const { 106 return (left == rhs.left) && (top == rhs.top) && 107 (right == rhs.right) && (bottom == rhs.bottom); 108 } 109 110 inline bool operator != (const Rect& rhs) const { 111 return !operator == (rhs); 112 } 113 114 // operator < defines an order which allows to use rectangles in sorted 115 // vectors. 116 bool operator < (const Rect& rhs) const; 117 offsetToOrigin()118 Rect& offsetToOrigin() { 119 right -= left; 120 bottom -= top; 121 left = top = 0; 122 return *this; 123 } offsetTo(const Point & p)124 Rect& offsetTo(const Point& p) { 125 return offsetTo(p.x, p.y); 126 } offsetBy(const Point & dp)127 Rect& offsetBy(const Point& dp) { 128 return offsetBy(dp.x, dp.y); 129 } 130 Rect& operator += (const Point& rhs) { 131 return offsetBy(rhs.x, rhs.y); 132 } 133 Rect& operator -= (const Point& rhs) { 134 return offsetBy(-rhs.x, -rhs.y); 135 } 136 const Rect operator + (const Point& rhs) const; 137 const Rect operator - (const Point& rhs) const; 138 translate(int dx,int dy)139 void translate(int dx, int dy) { // legacy, don't use. 140 offsetBy(dx, dy); 141 } 142 143 Rect& offsetTo(int x, int y); 144 Rect& offsetBy(int x, int y); 145 bool intersect(const Rect& with, Rect* result) const; 146 }; 147 148 ANDROID_BASIC_TYPES_TRAITS(Rect) 149 150 }; // namespace android 151 152 #endif // ANDROID_UI_RECT 153