2 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
4 // Licensed under the Flora License, Version 1.0 (the License);
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
8 // http://floralicense.org/license/
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an AS IS BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
19 #include <dali/public-api/common/constants.h>
20 #include <dali/public-api/math/math-utils.h>
21 #include <dali/public-api/object/property-input.h>
22 #include <dali-toolkit/public-api/controls/scrollable/scroll-view/scroll-view-constraints.h>
32 Vector3 MoveActorConstraint(const Vector3& current,
33 const PropertyInput& scrollPositionProperty)
35 return current + scrollPositionProperty.GetVector3();
38 Vector3 MoveScaledActorConstraint(const Vector3& current,
39 const PropertyInput& scrollPositionProperty,
40 const PropertyInput& scrollScaleProperty)
42 return scrollScaleProperty.GetVector3() * (current + scrollPositionProperty.GetVector3());
45 Vector3 ScaleActorConstraint(const Vector3& current,
46 const PropertyInput& scrollScaleProperty)
48 return current * scrollScaleProperty.GetVector3();
51 Vector3 WrapActorConstraint(const Vector3& current,
52 const PropertyInput& actorScaleProperty,
53 const PropertyInput& actorAnchorPointProperty,
54 const PropertyInput& actorSizeProperty,
55 const PropertyInput& scrollPositionMin,
56 const PropertyInput& scrollPositionMax,
57 const PropertyInput& scrollWrap)
59 Vector3 position = current;
60 bool wrap = scrollWrap.GetBoolean();
64 const Vector3& min = scrollPositionMin.GetVector3();
65 const Vector3& max = scrollPositionMax.GetVector3();
67 const Vector3& anchor = actorAnchorPointProperty.GetVector3();
68 const Vector3 scale = actorScaleProperty.GetVector3();
69 const Vector3 size = actorSizeProperty.GetVector3();
71 if(fabsf(min.x - max.x) > Math::MACHINE_EPSILON_1)
73 // WRAP X (based on the position of the right side)
74 float offsetX = (1.0f - anchor.x) * size.x * scale.x;
75 position.x = WrapInDomain(position.x + offsetX, min.x, max.x) - offsetX;
78 if(fabsf(min.y - max.y) > Math::MACHINE_EPSILON_1)
80 // WRAP Y (based on the position of the bottom side)
81 float offsetY = (1.0f - anchor.y) * size.y * scale.y;
82 position.y = WrapInDomain(position.y + offsetY, min.y, max.y) - offsetY;
89 } // namespace Toolkit