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Diffstat (limited to 'intern/ghost/intern/GHOST_Rect.cpp')
| -rw-r--r-- | intern/ghost/intern/GHOST_Rect.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/intern/ghost/intern/GHOST_Rect.cpp b/intern/ghost/intern/GHOST_Rect.cpp new file mode 100644 index 00000000000..cb600815f69 --- /dev/null +++ b/intern/ghost/intern/GHOST_Rect.cpp @@ -0,0 +1,140 @@ +/** + * $Id$ + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** + */ + +#include "GHOST_Rect.h" + + + +void GHOST_Rect::inset(GHOST_TInt32 i) +{ + if (i > 0) { + // Grow the rectangle + m_l -= i; + m_r += i; + m_t -= i; + m_b += i; + } + else if (i < 0) { + // Shrink the rectangle, check for insets larger than half the size + GHOST_TInt32 i2 = i * 2; + if (getWidth() > i2) { + m_l += i; + m_r -= i; + } + else { + m_l = m_l + ((m_r - m_l) / 2); + m_r = m_l; + } + if (getHeight() > i2) { + m_t += i; + m_b -= i; + } + else { + m_t = m_t + ((m_b - m_t) / 2); + m_b = m_t; + } + } +} + + +GHOST_TVisibility GHOST_Rect::getVisibility(GHOST_Rect& r) const +{ + bool lt = isInside(r.m_l, r.m_t); + bool rt = isInside(r.m_r, r.m_t); + bool lb = isInside(r.m_l, r.m_b); + bool rb = isInside(r.m_r, r.m_b); + GHOST_TVisibility v; + if (lt && rt && lb && rb) { + // All points inside, rectangle is inside this + v = GHOST_kFullyVisible; + } + else if (!(lt || rt || lb || rb)) { + // None of the points inside + // Check to see whether the rectangle is larger than this one + if ((r.m_l < m_l) && (r.m_t < m_t) && (r.m_r > m_r) && (r.m_b > m_b)) { + v = GHOST_kPartiallyVisible; + } + else { + v = GHOST_kNotVisible; + } + } + else { + // Some of the points inside, rectangle is partially inside + v = GHOST_kPartiallyVisible; + } + return v; +} + + +void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy) +{ + GHOST_TInt32 offset = cx - (m_l + (m_r - m_l)/2); + m_l += offset; + m_r += offset; + offset = cy - (m_t + (m_b - m_t)/2); + m_t += offset; + m_b += offset; +} + +void GHOST_Rect::setCenter(GHOST_TInt32 cx, GHOST_TInt32 cy, GHOST_TInt32 w, GHOST_TInt32 h) +{ + long w_2, h_2; + + w_2 = w >> 1; + h_2 = h >> 1; + m_l = cx - w_2; + m_t = cy - h_2; + m_r = m_l + w; + m_b = m_t + h; +} + +bool GHOST_Rect::clip(GHOST_Rect& r) const +{ + bool clipped = false; + if (r.m_l < m_l) { + r.m_l = m_l; + clipped = true; + } + if (r.m_t < m_t) { + r.m_t = m_t; + clipped = true; + } + if (r.m_r > m_r) { + r.m_r = m_r; + clipped = true; + } + if (r.m_b > m_b) { + r.m_b = m_b; + clipped = true; + } + return clipped; +} + |