1 #ifndef __DALI_KEY_FRAMES_H__
2 #define __DALI_KEY_FRAMES_H__
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/animation/alpha-functions.h>
23 #include <dali/public-api/object/base-handle.h>
24 #include <dali/public-api/object/property-value.h>
25 #include <dali/public-api/object/property-types.h>
30 namespace Internal DALI_INTERNAL
36 * @brief A set of key frames for a property that can be animated using Dali::Animation::AnimateBetween().
38 * This allows the generation of key frame objects from individual
39 * Property::Values. The type of the key frame is specified by the
40 * type of the first value to be added. Adding key frames with a
41 * different Property::Value type will result in a run time assert.
43 class DALI_IMPORT_API KeyFrames : public BaseHandle
47 * @brief Create an initialized KeyFrame handle.
49 * @return a handle to a newly allocated Dali resource.
51 static KeyFrames New();
54 * @brief Downcast an Object handle to KeyFrames handle.
56 * If handle points to a KeyFrames object the downcast produces
57 * valid handle. If not the returned handle is left uninitialized.
58 * @param[in] handle to An object
59 * @return handle to a KeyFrames object or an uninitialized handle
61 static KeyFrames DownCast( BaseHandle handle );
64 * @brief Create an uninitialized KeyFrame handle.
66 * This can be initialized with KeyFrame::New(). Calling member
67 * functions with an uninitialized Dali::Object is not allowed.
74 * This is non-virtual since derived Handle types must not contain data or virtual methods.
79 * @brief This copy constructor is required for (smart) pointer semantics.
81 * @param [in] handle A reference to the copied handle
83 KeyFrames(const KeyFrames& handle);
86 * @brief This assignment operator is required for (smart) pointer semantics.
88 * @param [in] rhs A reference to the copied handle
89 * @return A reference to this
91 KeyFrames& operator=(const KeyFrames& rhs);
94 * @brief This method is defined to allow assignment of the NULL value,
95 * and will throw an exception if passed any other value.
97 * Assigning to NULL is an alias for Reset().
98 * @param [in] rhs A NULL pointer
99 * @return A reference to this handle
101 KeyFrames& operator=(BaseHandle::NullType* rhs);
104 * @brief Gets the type of the key frame.
106 * If no key frames have been added, this returns Property::NONE.
107 * @return The key frame property type.
109 Property::Type GetType() const;
112 * @brief Add a key frame.
114 * The key frames should be added in time order.
115 * @param[in] progress A value between 0.0 and 1.0.
116 * @param[in] value A value.
118 void Add(float progress, Property::Value value);
121 * @brief Add a key frame.
123 * The key frames should be added in time order.
124 * @param[in] progress A value between 0.0 and 1.0.
125 * @param[in] value A value.
126 * @param[in] alpha The alpha function used to blend to the next keyframe
128 void Add(float progress, Property::Value value, AlphaFunction alpha);
131 public: // Not intended for application developers
133 * @brief This constructor is used by Dali::New() methods.
135 * @param[in] keyFrames A pointer to an internal KeyFrame resource
137 explicit DALI_INTERNAL KeyFrames(Internal::KeyFrames* keyFrames);
142 #endif // __DALI_KEY_FRAMES_H__