/* * Copyright (C) 2006 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef ANDROID_UI_RECT #define ANDROID_UI_RECT #include <utils/TypeHelpers.h> #include <ui/Point.h> namespace android { class Rect { public: int left; int top; int right; int bottom; // we don't provide copy-ctor and operator= on purpose // because we want the compiler generated versions inline Rect() { } inline Rect(int w, int h) : left(0), top(0), right(w), bottom(h) { } inline Rect(int l, int t, int r, int b) : left(l), top(t), right(r), bottom(b) { } inline Rect(const Point& lt, const Point& rb) : left(lt.x), top(lt.y), right(rb.x), bottom(rb.y) { } void makeInvalid(); // a valid rectangle has a non negative width and height inline bool isValid() const { return (width()>=0) && (height()>=0); } // an empty rect has a zero width or height, or is invalid inline bool isEmpty() const { return (width()<=0) || (height()<=0); } inline void set(const Rect& rhs) { operator = (rhs); } // rectangle's width inline int width() const { return right-left; } // rectangle's height inline int height() const { return bottom-top; } void setLeftTop(const Point& lt) { left = lt.x; top = lt.y; } void setRightBottom(const Point& rb) { right = rb.x; bottom = rb.y; } // the following 4 functions return the 4 corners of the rect as Point Point leftTop() const { return Point(left, top); } Point rightBottom() const { return Point(right, bottom); } Point rightTop() const { return Point(right, top); } Point leftBottom() const { return Point(left, bottom); } // comparisons inline bool operator == (const Rect& rhs) const { return (left == rhs.left) && (top == rhs.top) && (right == rhs.right) && (bottom == rhs.bottom); } inline bool operator != (const Rect& rhs) const { return !operator == (rhs); } // operator < defines an order which allows to use rectangles in sorted // vectors. bool operator < (const Rect& rhs) const; Rect& offsetToOrigin() { right -= left; bottom -= top; left = top = 0; return *this; } Rect& offsetTo(const Point& p) { return offsetTo(p.x, p.y); } Rect& offsetBy(const Point& dp) { return offsetBy(dp.x, dp.y); } Rect& operator += (const Point& rhs) { return offsetBy(rhs.x, rhs.y); } Rect& operator -= (const Point& rhs) { return offsetBy(-rhs.x, -rhs.y); } const Rect operator + (const Point& rhs) const; const Rect operator - (const Point& rhs) const; void translate(int dx, int dy) { // legacy, don't use. offsetBy(dx, dy); } Rect& offsetTo(int x, int y); Rect& offsetBy(int x, int y); bool intersect(const Rect& with, Rect* result) const; }; ANDROID_BASIC_TYPES_TRAITS(Rect) }; // namespace android #endif // ANDROID_UI_RECT