1 #ifndef __DALI_ACTIVE_CONSTRAINT_H__
2 #define __DALI_ACTIVE_CONSTRAINT_H__
5 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 // Licensed under the Flora License, Version 1.0 (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://floralicense.org/license/
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.
21 * @addtogroup CAPI_DALI_ANIMATION_MODULE
26 #include <dali/public-api/animation/active-constraint-declarations.h>
27 #include <dali/public-api/object/any.h>
28 #include <dali/public-api/object/handle.h>
29 #include <dali/public-api/object/property.h>
31 namespace Dali DALI_IMPORT_API
34 namespace Internal DALI_INTERNAL
36 class ActiveConstraintBase;
40 * @brief A constraint which is being applied to an object.
42 class DALI_IMPORT_API ActiveConstraint : public Handle
47 static const Property::Index WEIGHT; ///< Property 0, name "weight", type FLOAT
49 static const float FINAL_WEIGHT; ///< 1.0f means the constraint is fully-applied, unless weight is still being animated
50 static const float DEFAULT_WEIGHT; ///< 1.0f
53 static const char* const SIGNAL_APPLIED; ///< name "applied"
56 * @brief Create an uninitialized Constraint; this can be initialized with Constraint::New().
58 * Calling member functions with an uninitialized Dali::Object is not allowed.
65 virtual ~ActiveConstraint();
68 * @copydoc Dali::BaseHandle::operator=
70 using BaseHandle::operator=;
73 * @brief Retrieve the object which this constraint is targeting.
75 * @return The target object.
77 Handle GetTargetObject();
80 * @brief Retrieve the property which this constraint is targeting.
82 * @return The target property.
84 Property::Index GetTargetProperty();
87 * @brief Set the weight of the constraint; this is a value clamped between 0.
89 * The default is 1.0f.
90 * 0.0f means the constraint has no effect, and 1.0f means the constraint is fully-applied.
91 * @note This is an asynchronous method; the value written may not match a value subsequently read with GetCurrentWeight().
92 * @param [in] weight The weight.
94 void SetWeight( float weight );
97 * @brief Retrieve the current weight of the constraint.
99 * @return The current weight.
101 float GetCurrentWeight() const;
104 * @brief This signal is emitted after the apply-time of the constraint has expired.
106 * @note A non-zero apply-time must have been set using Constraint::SetApplyTime().
107 * @return A signal object to Connect() with.
109 ActiveConstraintSignalV2& AppliedSignal();
111 public: // Not intended for use by Application developers
114 * @brief This constructor is used by Dali New() methods.
116 * @param [in] constraint A pointer to a newly allocated Dali resource
118 explicit DALI_INTERNAL ActiveConstraint( Internal::ActiveConstraintBase* constraint );
126 #endif // __DALI_ACTIVE_CONSTRAINT_H__