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Diffstat (limited to 'fltk/fltk/Rectangle.h')
| -rw-r--r-- | fltk/fltk/Rectangle.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/fltk/fltk/Rectangle.h b/fltk/fltk/Rectangle.h new file mode 100644 index 0000000..22637a5 --- /dev/null +++ b/fltk/fltk/Rectangle.h @@ -0,0 +1,122 @@ +// "$Id: Rectangle.h 5454 2006-09-19 02:38:02Z spitzak $" +// +// Copyright 1998-2006 by Bill Spitzak and others. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Library General Public License for more details. +// +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 +// USA. +// +// Please report all bugs and problems to "fltk-bugs@fltk.org". + +#ifndef fltk_Rectangle_h +#define fltk_Rectangle_h + +#include "FL_API.h" + +// rectangle macros that help keeping rectangle predicates as strict as possible +// even when not using rectangles in some situations (as when only using w h scalars) +// so that there is only one strict defintion for common predicates, +// if one change the following, it will be repercuted in all the core lib +#define FLTK_RECT_EMPTY(w,h) (w <= 0 || h <= 0) +// we should always use the same evaluation for center_x, center_y in all corelib code: +//#define FLTK_CENTER_X(coord, length) (coord + (length>>1)) +//#define FLTK_CENTER_Y(coord, length) (coord + (length>>1)) + +namespace fltk { + +class FL_API Rectangle { + int x_, y_, w_, h_; + + public: + + /*! Left edge */ + int x() const {return x_;} + /*! Top edge */ + int y() const {return y_;} + /*! Distance between left and right edges */ + int w() const {return w_;} + /*! Distance between top and bottom edges */ + int h() const {return h_;} + /*! Return x()+w(), the right edge of the rectangle. */ + int r() const {return x_+w_;} + /*! Return y()+h(), the bottom edge of the rectangle. */ + int b() const {return y_+h_;} + /*! Move the rectangle so the left edge is at \a v. */ + void x(int v) {x_ = v;} + /*! Move the rectangle so the top edge is at \a v. */ + void y(int v) {y_ = v;} + /*! Change w() by moving the right edge. x() does not change. */ + void w(int v) {w_ = v;} + /*! Change h() by moving the bottom edge. y() does not change. */ + void h(int v) {h_ = v;} + /*! Change x() without changing r(), by changing the width. */ + void set_x(int v) {w_ -= v-x_; x_ = v;} + /*! Change y() without changing b(), by changing the height. */ + void set_y(int v) {h_ -= v-y_; y_ = v;} + /*! Change r() without changing x(), by changine the width. */ + void set_r(int v) {w_ = v-x_;} + /*! Change b() without changing y(), by changine the height. */ + void set_b(int v) {h_ = v-y_;} + /*! Set x(), y(), w(), and h() all at once. */ + void set(int x, int y, int w, int h) {x_=x; y_=y; w_=w; h_=h;} + /*! Sets x, y, w, h so that's it's centered or aligned (if flags!=0) inside the source r */ + void set (const Rectangle& r, int w, int h, int flags = 0); + /*! Add \a d to x() without changing r() (it reduces w() by \a d). */ + void move_x(int d) {x_ += d; w_ -= d;} + /*! Add \a d to y() without changing b() (it reduces h() by \a d). */ + void move_y(int d) {y_ += d; h_ -= d;} + /*! Add \a d to r() and w(). */ + void move_r(int d) {w_ += d;} + /*! Add \a d to b() and h(). */ + void move_b(int d) {h_ += d;} + /*! Move all edges in by \a d. See also Symbol::inset() */ + void inset(int d) {x_ += d; y_ += d; w_ -= 2*d; h_ -= 2*d;} + /*! Move entire rectangle by given distance in x and y. */ + void move(int dx, int dy) {x_ += dx; y_ += dy;} + /*! True if w() or h() are less or equal to zero. */ + bool empty() const {return FLTK_RECT_EMPTY(w_, h_);} + /*! Same as !empty(), true if w() and h() are both greater than zero. */ + bool not_empty() const {return !FLTK_RECT_EMPTY(w_, h_);} + /*! Integer center position. Rounded to the left if w() is odd. */ + int center_x() const {return x_+(w_>>1);} + /*! Integer center position. Rounded to lower y if h() is odd. */ + int center_y() const {return y_+(h_>>1);} + /*! Where to put baseline to center current font nicely */ + int baseline_y() const; + + Rectangle() {} + + /*! Constructor that sets x(), y(), w(), and h(). */ + Rectangle(int x, int y, int w, int h) : x_(x), y_(y), w_(w), h_(h) {} + + /*! Constructor that sets x() and y() to zero, and sets w() and h(). */ + Rectangle(int w, int h) : x_(0), y_(0), w_(w), h_(h) {} + + /*! Copy constructor. */ + Rectangle(const Rectangle& r) : x_(r.x_),y_(r.y_),w_(r.w_),h_(r.h_) {} + + /*! Constructor that calls set(). */ + Rectangle(const Rectangle& r, int w, int h, int flags = 0) {set(r,w,h,flags);} + + /*! True if rectangle contains the pixel who's upper-left corner is at x,y */ + bool contains(int x, int y) const {return x>=x_ && y>=y_ && x<x_+w_ && y<y_+h_;} + + void merge(const Rectangle& r); + void intersect(const Rectangle& r); + +}; + +} + +#endif |