2 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (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://www.apache.org/licenses/LICENSE-2.0
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-toolkit/public-api/controls/scrollable/item-view/item-layout.h>
22 #include <dali/public-api/animation/animation.h>
23 #include <dali/public-api/animation/constraint.h>
24 #include <dali/public-api/animation/time-period.h>
27 #include <dali-toolkit/public-api/controls/scrollable/item-view/item-view.h>
35 struct ItemLayout::Impl
37 Vector3 mItemSize; ///< The size of an item in the layout
38 ControlOrientation::Type mOrientation; ///< the orientation of the layout.
41 ItemLayout::ItemLayout()
44 mImpl->mOrientation = ControlOrientation::Up;
47 ItemLayout::~ItemLayout()
52 void ItemLayout::SetOrientation(ControlOrientation::Type orientation)
54 mImpl->mOrientation = orientation;
57 ControlOrientation::Type ItemLayout::GetOrientation() const
59 return mImpl->mOrientation;
62 void ItemLayout::GetItemSize( unsigned int itemId, const Vector3& layoutSize, Vector3& itemSize ) const
64 // If item-size has not been set then get the default size
65 if ( mImpl->mItemSize == Vector3::ZERO )
67 GetDefaultItemSize( itemId, layoutSize, itemSize );
71 itemSize = mImpl->mItemSize;
75 void ItemLayout::SetItemSize( const Vector3& itemSize )
77 mImpl->mItemSize = itemSize;
80 float ItemLayout::GetClosestOnScreenLayoutPosition(int itemID, float currentLayoutPosition, const Vector3& layoutSize)
82 Vector3 itemPosition = GetItemPosition( itemID, currentLayoutPosition, layoutSize );
84 GetItemSize(itemID, layoutSize, itemSize);
85 Vector3 onScreenArea = (layoutSize - itemSize) * 0.5f;
86 if (itemPosition.x < -onScreenArea.x
87 || itemPosition.x > onScreenArea.x
88 || itemPosition.y < -onScreenArea.y
89 || itemPosition.y > onScreenArea.y)
91 // item not within viewable area
92 // safest thing to do here since we have no idea how the implementation will work is to return the scroll to position
93 return GetItemScrollToPosition(itemID);
95 return currentLayoutPosition;
98 int ItemLayout::GetNextFocusItemID(int itemID, int maxItems, Dali::Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled)
102 case Control::KeyboardFocus::LEFT:
103 case Control::KeyboardFocus::UP:
108 itemID = loopEnabled ? maxItems - 1 : 0;
112 case Control::KeyboardFocus::RIGHT:
113 case Control::KeyboardFocus::DOWN:
116 if( itemID >= maxItems )
118 itemID = loopEnabled ? 0 : maxItems - 1;
126 float ItemLayout::GetFlickSpeedFactor() const
128 // By default, the speed factor while dragging and swiping is the same.
129 return GetScrollSpeedFactor();
132 } // namespace Toolkit