forked from bartvdbraak/blender
142 lines
3.0 KiB
C++
142 lines
3.0 KiB
C++
/**
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* $Id$
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "GHOST_Rect.h"
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void GHOST_Rect::inset(GHOST_TInt32 i)
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{
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if (i > 0) {
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// Grow the rectangle
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m_l -= i;
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m_r += i;
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m_t -= i;
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m_b += i;
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}
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else if (i < 0) {
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// Shrink the rectangle, check for insets larger than half the size
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GHOST_TInt32 i2 = i * 2;
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if (getWidth() > i2) {
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m_l += i;
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m_r -= i;
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}
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else {
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m_l = m_l + ((m_r - m_l) / 2);
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m_r = m_l;
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}
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if (getHeight() > i2) {
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m_t += i;
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m_b -= i;
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}
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else {
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m_t = m_t + ((m_b - m_t) / 2);
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m_b = m_t;
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}
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}
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}
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GHOST_TVisibility GHOST_Rect::getVisibility(GHOST_Rect& r) const
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{
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bool lt = isInside(r.m_l, r.m_t);
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bool rt = isInside(r.m_r, r.m_t);
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bool lb = isInside(r.m_l, r.m_b);
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bool rb = isInside(r.m_r, r.m_b);
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GHOST_TVisibility v;
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if (lt && rt && lb && rb) {
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// All points inside, rectangle is inside this
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v = GHOST_kFullyVisible;
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}
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else if (!(lt || rt || lb || rb)) {
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// None of the points inside
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// Check to see whether the rectangle is larger than this one
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if ((r.m_l < m_l) && (r.m_t < m_t) && (r.m_r > m_r) && (r.m_b > m_b)) {
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v = GHOST_kPartiallyVisible;
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}
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else {
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v = GHOST_kNotVisible;
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}
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}
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else {
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// Some of the points inside, rectangle is partially inside
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v = GHOST_kPartiallyVisible;
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}
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return v;
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}
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void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy)
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{
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GHOST_TInt32 offset = cx - (m_l + (m_r - m_l)/2);
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m_l += offset;
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m_r += offset;
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offset = cy - (m_t + (m_b - m_t)/2);
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m_t += offset;
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m_b += offset;
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}
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void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy, GHOST_TInt32 w, GHOST_TInt32 h)
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{
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long w_2, h_2;
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w_2 = w >> 1;
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h_2 = h >> 1;
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m_l = cx - w_2;
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m_t = cy - h_2;
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m_r = m_l + w;
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m_b = m_t + h;
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}
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bool GHOST_Rect::clip(GHOST_Rect& r) const
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{
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bool clipped = false;
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if (r.m_l < m_l) {
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r.m_l = m_l;
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clipped = true;
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}
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if (r.m_t < m_t) {
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r.m_t = m_t;
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clipped = true;
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}
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if (r.m_r > m_r) {
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r.m_r = m_r;
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clipped = true;
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}
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if (r.m_b > m_b) {
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r.m_b = m_b;
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clipped = true;
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}
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return clipped;
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}
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