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CAnimationRect Class

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The latest version of this topic can be found at CAnimationRect Class.

Implements the functionality of a rectangle whose sides can be animated.

Syntax

class CAnimationRect : public CAnimationBaseObject;

Members

Public Constructors

Name Description
CAnimationRect::CAnimationRect Overloaded. Constructs an animation rect object.

Public Methods

Name Description
CAnimationRect::AddTransition Adds transitions for left, top, right and bottom coordinates.
CAnimationRect::GetBottom Provides access to CAnimationVariable representing bottom coordinate.
CAnimationRect::GetDefaultValue Returns the default values for rectangle's bounds.
CAnimationRect::GetLeft Provides access to CAnimationVariable representing left coordinate.
CAnimationRect::GetRight Provides access to CAnimationVariable representing right coordinate.
CAnimationRect::GetTop Provides access to CAnimationVariable representing top coordinate.
CAnimationRect::GetValue Returns current value.
CAnimationRect::SetDefaultValue Sets default value.

Protected Methods

Name Description
CAnimationRect::GetAnimationVariableList Puts the encapsulated animation variables into a list. (Overrides CAnimationBaseObject::GetAnimationVariableList.)

Public Operators

Name Description
CAnimationRect::operator RECT Converts a CAnimationRect to RECT.
CAnimationRect::operator= Assigns rect to CAnimationRect.

Public Data Members

Name Description
CAnimationRect::m_bFixedSize Specifies whether the rectangle has fixed size.

Protected Data Members

Name Description
CAnimationRect::m_bottomValue The encapsulated animation variable that represents Bottom bound of animation rectangle.
CAnimationRect::m_leftValue The encapsulated animation variable that represents Left bound of animation rectangle.
CAnimationRect::m_rightValue The encapsulated animation variable that represents Right bound of animation rectangle.
CAnimationRect::m_szInitial Specifies initial size of animation rectangle.
CAnimationRect::m_topValue The encapsulated animation variable that represents Top bound of animation rectangle.

Remarks

The CAnimationRect class encapsulates four CAnimationVariable objects and can represent in applications a rectangle. To use this class in application, just instantiate an object of this class, add it to animation controller using CAnimationController::AddAnimationObject and call AddTransition for each transition to be applied to left, right top and bottom coordinates.

Inheritance Hierarchy

CObject

CAnimationBaseObject

CAnimationRect

Requirements

Header: afxanimationcontroller.h

CAnimationRect::AddTransition

Adds transitions for left, top, right and bottom coordinates.

void AddTransition(
    CBaseTransition* pLeftTransition,  
    CBaseTransition* pTopTransition,  
    CBaseTransition* pRightTransition,  
    CBaseTransition* pBottomTransition);

Parameters

pLeftTransition
Specifies transition for the left side.

pTopTransition
Specifies transition for the top side.

pRightTransition
Specifies transition for the right side.

pBottomTransition
Specifies transition for the bottom side.

Remarks

Call this function to add the specified transitions to the internal list of transitions to be applied to animation variables for each rectangle sides. When you add transitions, they are not applied immediately and stored in an internal list. Transitions are applied (added to a storyboard for a particular value) when you call CAnimationController::AnimateGroup. If you don't need to apply a transition to one of the rectangle sides, you can pass NULL.

CAnimationRect::CAnimationRect

Constructs a CAnimationRect object.

CAnimationRect();

 
CAnimationRect(
    const CRect& rect,  
    UINT32 nGroupID,  
    UINT32 nObjectID = (UINT32)-1,  
    DWORD dwUserData = 0);

 
CAnimationRect(
    const CPoint& pt,  
    const CSize& sz,  
    UINT32 nGroupID,  
    UINT32 nObjectID = (UINT32)-1,  
    DWORD dwUserData = 0);

 
CAnimationRect(
    int nLeft,  
    int nTop,  
    int nRight,  
    int nBottom,  
    UINT32 nGroupID,  
    UINT32 nObjectID = (UINT32)-1,  
    DWORD dwUserData = 0);

Parameters

rect
Specifies default rectangle.

nGroupID
Specifies Group ID.

nObjectID
Specifies Object ID.

dwUserData
Specifies user-defined data.

pt
Coordinate of top-left corner.

sz
Size of rectangle.

nLeft
Specifies coordinate of left bound.

nTop
Specifies coordinate of top bound.

nRight
Specifies coordinate of right bound.

nBottom
Specifies coordinate of bottom bound.

Remarks

The object is constructed with default values for left, top, right and bottom, Object ID and Group ID, which will be set to 0. They can be changed later at runtime using SetDefaultValue and SetID.

CAnimationRect::GetAnimationVariableList

Puts the encapsulated animation variables into a list.

virtual void GetAnimationVariableList(CList<CAnimationVariable*, CAnimationVariable*>& lst);

Parameters

lst
When the function returns, it contains pointers to four CAnimationVariable objects representing coordinates of rectangle.

CAnimationRect::GetBottom

Provides access to CAnimationVariable representing bottom coordinate.

CAnimationVariable& GetBottom();

Return Value

A reference to encapsulated CAnimationVariable representing bottom coordinate.

Remarks

You can call this method to get direct access to underlying CAnimationVariable representing the bottom coordinate.

CAnimationRect::GetDefaultValue

Returns the default values for rectangle's bounds.

CRect GetDefaultValue();

Return Value

A CRect value containing defaults for left, right, top and bottom.

Remarks

Call this function to retrieve default value, which was previously set by constructor or SetDefaultValue.

CAnimationRect::GetLeft

Provides access to CAnimationVariable representing left coordinate.

CAnimationVariable& GetLeft();

Return Value

A reference to encapsulated CAnimationVariable representing left coordinate.

Remarks

You can call this method to get direct access to underlying CAnimationVariable representing the left coordinate.

CAnimationRect::GetRight

Provides access to CAnimationVariable representing right coordinate.

CAnimationVariable& GetRight();

Return Value

A reference to encapsulated CAnimationVariable representing right coordinate.

Remarks

You can call this method to get direct access to underlying CAnimationVariable representing the right coordinate.

CAnimationRect::GetTop

Provides access to CAnimationVariable representing top coordinate.

CAnimationVariable& GetTop();

Return Value

A reference to encapsulated CAnimationVariable representing top coordinate.

Remarks

You can call this method to get direct access to underlying CAnimationVariable representing the top coordinate.

CAnimationRect::GetValue

Returns current value.

BOOL GetValue(CRect& rect);

Parameters

rect
Output. Contains the current value when this method returns.

Return Value

TRUE, if the current value was successfully retrieved; otherwise FALSE.

Remarks

Call this function to retrieve the current value of animation rectangle. If this method fails or underlying COM objects for left, top, right and bottom have not been initialized, rect contains default value, which was previously set in constructor or by SetDefaultValue.

CAnimationRect::m_bFixedSize

Specifies whether the rectangle has fixed size.

BOOL m_bFixedSize;

Remarks

If this member is true, then the size of rectangle is fixed and right and bottom values are recalculated each time the top-left corner is moved according to the fixed size. Set this value to TRUE to easily move the rectangle around the screen. In this case transitions applied to right and bottom coordinates are ignored. The size is stored internally when you construct the object and/or call SetDefaultValue. By default this member is set to FALSE.

CAnimationRect::m_bottomValue

The encapsulated animation variable that represents Bottom bound of animation rectangle.

CAnimationVariable m_bottomValue;

CAnimationRect::m_leftValue

The encapsulated animation variable that represents Left bound of animation rectangle.

CAnimationVariable m_leftValue;

CAnimationRect::m_rightValue

The encapsulated animation variable that represents Right bound of animation rectangle.

CAnimationVariable m_rightValue;

CAnimationRect::m_szInitial

Specifies initial size of animation rectangle.

CSize m_szInitial;

CAnimationRect::m_topValue

The encapsulated animation variable that represents Top bound of animation rectangle.

CAnimationVariable m_topValue;

CAnimationRect::operator RECT

Converts a CAnimationRect to RECT.

operator RECT();

Return Value

Current value of animation rectangle as RECT.

Remarks

This function internally calls GetValue. If GetValue for some reason fails, the returned RECT will contain default values for all rectangle coordinates.

CAnimationRect::operator=

Assigns rect to CAnimationRect.

void operator=(const RECT& rect);

Parameters

rect
The new value of animation rectangle.

Remarks

It's recommended to do that before animation start, because this operator calls SetDefaultValue, which recreates the underlying COM objects for color components if they have been created. If you subscribed this animation object to events (ValueChanged or IntegerValueChanged), you need to re-enable these events.

CAnimationRect::SetDefaultValue

Sets default value.

void SetDefaultValue(const CRect& rect);

Parameters

rect
Specifies new default values for left, top, right and bottom.

Remarks

Use this function to set a default value to animation object. This methods assigns default values to rectangle's bounds. It also recreates underlying COM objects if they have been created. If you subscribed this animation object to events (ValueChanged or IntegerValueChanged), you need to re-enable these events.

See Also

Classes