|
sl@0
|
1 |
// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
sl@0
|
2 |
// All rights reserved.
|
|
sl@0
|
3 |
// This component and the accompanying materials are made available
|
|
sl@0
|
4 |
// under the terms of "Eclipse Public License v1.0"
|
|
sl@0
|
5 |
// which accompanies this distribution, and is available
|
|
sl@0
|
6 |
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
sl@0
|
7 |
//
|
|
sl@0
|
8 |
// Initial Contributors:
|
|
sl@0
|
9 |
// Nokia Corporation - initial contribution.
|
|
sl@0
|
10 |
//
|
|
sl@0
|
11 |
// Contributors:
|
|
sl@0
|
12 |
//
|
|
sl@0
|
13 |
// Description:
|
|
sl@0
|
14 |
//
|
|
sl@0
|
15 |
|
|
sl@0
|
16 |
#ifndef TREGIONEXTEND_H_
|
|
sl@0
|
17 |
#define TREGIONEXTEND_H_
|
|
sl@0
|
18 |
|
|
sl@0
|
19 |
#include <e32std.h>
|
|
sl@0
|
20 |
|
|
sl@0
|
21 |
class TRegionExtend : public TRegion
|
|
sl@0
|
22 |
{
|
|
sl@0
|
23 |
//Note that this class is generally only good for regions with dimensions less than 45000x45000
|
|
sl@0
|
24 |
//as integers are used to hold the final total area, and would overflow.
|
|
sl@0
|
25 |
//In debug build, panic TRegionExtend x003 is raised, where x indicates a code-point
|
|
sl@0
|
26 |
// when any rectangle in the region exceeds 32k
|
|
sl@0
|
27 |
|
|
sl@0
|
28 |
private:
|
|
sl@0
|
29 |
//Do not construct instances of this class, use the Cast() methods to convert existing region instances
|
|
sl@0
|
30 |
TRegionExtend();
|
|
sl@0
|
31 |
TRegionExtend(const TRegionExtend&);
|
|
sl@0
|
32 |
public:
|
|
sl@0
|
33 |
//Please use TRegionExtend::Cast() calls to extend existing TRegion objects
|
|
sl@0
|
34 |
static TRegionExtend& Cast(TRegion& aSrc) { return (TRegionExtend&) aSrc; }
|
|
sl@0
|
35 |
static TRegionExtend* Cast(TRegion* aSrc) { return (TRegionExtend*) aSrc; }
|
|
sl@0
|
36 |
static const TRegionExtend& Cast(const TRegion& aSrc) { return (const TRegionExtend&) aSrc; }
|
|
sl@0
|
37 |
static const TRegionExtend* Cast(const TRegion* aSrc) { return (const TRegionExtend*) aSrc; }
|
|
sl@0
|
38 |
|
|
sl@0
|
39 |
public:
|
|
sl@0
|
40 |
using TRegion::RectangleListW;
|
|
sl@0
|
41 |
enum TOverlapFlags
|
|
sl@0
|
42 |
{
|
|
sl@0
|
43 |
EExact= 0x0000,
|
|
sl@0
|
44 |
ESub= 0x0001,
|
|
sl@0
|
45 |
EAdd= 0x0002,
|
|
sl@0
|
46 |
EDiffers= 0x0003, //Added and/or subtracted
|
|
sl@0
|
47 |
ENoIntersect= 0x0004,
|
|
sl@0
|
48 |
EErrorRegion= 0x0008 //This code is returned if one of the input regions is flagged as invalid
|
|
sl@0
|
49 |
};
|
|
sl@0
|
50 |
|
|
sl@0
|
51 |
/** Avoids the use of a temp region by performing area calc on the fly.
|
|
sl@0
|
52 |
* If both regions are empty then EOverlapNoIntersect only is returned.
|
|
sl@0
|
53 |
* Limitation: this method is only good for regions with less than 2 billion units of area!
|
|
sl@0
|
54 |
* @param aTarget target region for difference
|
|
sl@0
|
55 |
**/
|
|
sl@0
|
56 |
TOverlapFlags TestDifference(const TRegion& aTarget)const;
|
|
sl@0
|
57 |
|
|
sl@0
|
58 |
/** Further avoids the use of a temp region by performing area calc on the fly.
|
|
sl@0
|
59 |
* If both regions are empty then EOverlapNoIntersect only is returned.
|
|
sl@0
|
60 |
* Limitation: this method is only good for regions with less than 2 billion units of area!
|
|
sl@0
|
61 |
* @param aTarget target region for difference
|
|
sl@0
|
62 |
* @param aOffset origin offset transformation from this to target region
|
|
sl@0
|
63 |
**/
|
|
sl@0
|
64 |
TOverlapFlags TestDifference(const TRegion& aTarget,TPoint aOffset )const;
|
|
sl@0
|
65 |
|
|
sl@0
|
66 |
/** Avoids the use of a temp region by performing area calc on the fly.
|
|
sl@0
|
67 |
* If region and rect both empty then EOverlapNoIntersect only is returned.
|
|
sl@0
|
68 |
* Limitation: this method is only good for regions and rects with less than 2 billion units of area!
|
|
sl@0
|
69 |
**/
|
|
sl@0
|
70 |
TOverlapFlags TestDifference(const TRect&)const;
|
|
sl@0
|
71 |
|
|
sl@0
|
72 |
/** Intended as an internal method to test for the overlap of two rectangles.
|
|
sl@0
|
73 |
*
|
|
sl@0
|
74 |
**/
|
|
sl@0
|
75 |
static TOverlapFlags TestDifference(const TRect&,const TRect&);
|
|
sl@0
|
76 |
|
|
sl@0
|
77 |
/** Returns total area of the region
|
|
sl@0
|
78 |
* Limitation: this method is only good for regions with less than 2 billion units of area!
|
|
sl@0
|
79 |
**/
|
|
sl@0
|
80 |
TUint Area()const;
|
|
sl@0
|
81 |
|
|
sl@0
|
82 |
|
|
sl@0
|
83 |
protected:
|
|
sl@0
|
84 |
};
|
|
sl@0
|
85 |
|
|
sl@0
|
86 |
#endif /*TREGIONEXTEND_H_*/
|