custom-layout-impl.h
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#ifndef DEMO_INTERNAL_CUSTOM_LAYOUT_H
#define DEMO_INTERNAL_CUSTOM_LAYOUT_H
/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// EXTERNAL INCLUDES
#include <dali/public-api/common/intrusive-ptr.h>
#include <dali-toolkit/devel-api/layouting/layout-group-impl.h>
// INTERNAL INCLUDES
#include "custom-layout.h"
namespace Demo
{
namespace Internal
{
using Dali::Toolkit::MeasureSpec;
using Dali::Toolkit::LayoutLength;
class CustomLayout;
using CustomLayoutPtr = Dali::IntrusivePtr< CustomLayout >;
/**
* @brief The implementation of our custom layout.
*
* Here we will override the methods that we require to mimic a very simple horizontal layout.
*/
class CustomLayout final : public Dali::Toolkit::Internal::LayoutGroup
{
public:
/**
* @brief Create a new CustomLayout object.
* @return An intrusive pointer to the created CustomLayout object
*/
static CustomLayoutPtr New();
// Movable but not copyable
CustomLayout( const CustomLayout& other ) = delete;
CustomLayout& operator=( const CustomLayout& ) = delete;
CustomLayout( CustomLayout&& other ) = default;
CustomLayout& operator=( CustomLayout&& other ) = default;
private:
/**
* @brief Default Constructor
*/
CustomLayout() = default;
/**
* Virtual Destructor
*/
virtual ~CustomLayout() = default;
/**
* @copydoc LayoutItem::OnMeasure
*
* Overriding this method so that we can calculate the size we require using our children's sizes
*/
virtual void OnMeasure( MeasureSpec widthMeasureSpec, Dali::Toolkit::MeasureSpec heightMeasureSpec ) override;
/**
* @copydoc LayoutItem::OnLayout
*
* Overriding this method so that we can layout our children as required.
*/
virtual void OnLayout( bool changed, LayoutLength left, LayoutLength top, LayoutLength right, LayoutLength bottom ) override;
};
} // namespace Internal
inline Internal::CustomLayout& GetImplementation( Demo::CustomLayout& handle )
{
DALI_ASSERT_ALWAYS( handle && "CustomLayout handle is empty" );
Dali::BaseObject& object = handle.GetBaseObject();
return static_cast<Internal::CustomLayout&>( object );
}
inline const Internal::CustomLayout& GetImplementation( const Demo::CustomLayout& handle )
{
DALI_ASSERT_ALWAYS( handle && "CustomLayout handle is empty" );
const Dali::BaseObject& object = handle.GetBaseObject();
return static_cast<const Internal::CustomLayout&>( object );
}
} // namespace Demo
#endif // DEMO_INTERNAL_CUSTOM_LAYOUT_H