Tizen Native API  6.5
Dali::Toolkit::ImageView Class Reference

ImageView is a class for displaying an image resource. More...

Inheritance diagram for Dali::Toolkit::ImageView:
Dali::Toolkit::Control Dali::CustomActor Dali::Actor Dali::Handle Dali::BaseHandle

Classes

struct  Property
 Enumeration for the instance of properties belonging to the ImageView class. More...

Public Types

enum  PropertyRange
 Enumeration for the start and end property ranges for this control. More...

Public Member Functions

 ImageView ()
 Creates an uninitialized ImageView.
 ~ImageView ()
 Destructor.
 ImageView (const ImageView &imageView)
 Copy constructor.
ImageViewoperator= (const ImageView &imageView)
 Assignment operator.
void SetImage (Image image) DALI_DEPRECATED_API
 Sets this ImageView from an Image instance.
void SetImage (const std::string &url)
 Sets this ImageView from the given URL.
void SetImage (const std::string &url, ImageDimensions size)
 Sets this ImageView from the given URL.
Image GetImage () const DALI_DEPRECATED_API
 Gets the Image instance handle used by the ImageView.

Static Public Member Functions

static ImageView New ()
 Create an initialized ImageView.
static ImageView New (Image image) DALI_DEPRECATED_API
 Creates an initialized ImageView from an Image instance.
static ImageView New (const std::string &url)
 Creates an initialized ImageView from an URL to an image resource.
static ImageView New (const std::string &url, ImageDimensions size)
 Creates an initialized ImageView from a URL to an image resource.
static ImageView DownCast (BaseHandle handle)
 Downcasts a handle to ImageView handle.

Detailed Description

ImageView is a class for displaying an image resource.

An instance of ImageView can be created using a URL or an Image instance.

Some resources can be loaded before the ImageView is staged ( already cached ), in these cases if the connection to ResouceReadySignal is done after the resource is set then signal will be missed.

To protect against this, IsResourceReady() can be checked before connecting to ResourceReadySignal, or the signal connection can be done before setting the resource.

    auto myImageView = ImageView::New( resourceUrl );
    if ( myImageView.IsResourceReady() )
    {
       // do something
    }
    else
    {
      myImageView.ResourceReadySignal.Connect( .... )
    }

OR Connect to signal before setting resource

    auto myImageView = ImageView::New();
    myImageView.ResourceReadySignal.Connect( .... )
    myImageView.SetProperty( ImageView::Property::IMAGE, resourceUrl );
Since:
3.0, DALi version 1.0.0

Member Enumeration Documentation

Enumeration for the start and end property ranges for this control.

Since:
3.0, DALi version 1.0.0
Enumerator:
PROPERTY_START_INDEX 
Since:
3.0, DALi version 1.0.0
PROPERTY_END_INDEX 

Reserve property indices.

Since:
3.0, DALi version 1.0.0
ANIMATABLE_PROPERTY_START_INDEX 
Since:
3.0, DALi version 1.1.18
ANIMATABLE_PROPERTY_END_INDEX 

Reserve animatable property indices,.

Since:
3.0, DALi version 1.1.18

Reimplemented from Dali::Toolkit::Control.


Constructor & Destructor Documentation

Creates an uninitialized ImageView.

Since:
3.0, DALi version 1.0.0

Destructor.

This is non-virtual since derived Handle types must not contain data or virtual methods.

Since:
3.0, DALi version 1.0.0

Copy constructor.

Since:
3.0, DALi version 1.0.0
Parameters:
[in]imageViewImageView to copy. The copied ImageView will point at the same implementation

Member Function Documentation

Downcasts a handle to ImageView handle.

If handle points to a ImageView, the downcast produces valid handle. If not, the returned handle is left uninitialized.

Since:
3.0, DALi version 1.0.0
Parameters:
[in]handleHandle to an object
Returns:
Handle to a ImageView or an uninitialized handle

Reimplemented from Dali::Toolkit::Control.

Gets the Image instance handle used by the ImageView.

Deprecated:
Deprecated since 3.0, DALi version 1.1.4

A valid handle will be returned only if this instance was created with New(Image) or SetImage(Image) was called.

Since:
3.0, DALi version 1.0.0
Returns:
The Image instance currently used by the ImageView

Create an initialized ImageView.

Since:
3.0, DALi version 1.0.0
Returns:
A handle to a newly allocated Dali ImageView
Note:
ImageView will not display anything.

Reimplemented from Dali::Toolkit::Control.

static ImageView Dali::Toolkit::ImageView::New ( Image  image) [static]

Creates an initialized ImageView from an Image instance.

Deprecated:
Deprecated since 3.0, DALi version 1.2.8, use New( const std::string& ) instead.

If the handle is empty, ImageView will not display anything.

Since:
3.0, DALi version 1.0.0
Parameters:
[in]imageThe Image instance to display
Returns:
A handle to a newly allocated ImageView
static ImageView Dali::Toolkit::ImageView::New ( const std::string &  url) [static]

Creates an initialized ImageView from an URL to an image resource.

If the string is empty, ImageView will not display anything.

Since:
3.0, DALi version 1.0.0
Remarks:
http://tizen.org/privilege/internet is needed if url is a http or https address.
http://tizen.org/privilege/mediastorage is needed if url is relevant to media storage.
http://tizen.org/privilege/externalstorage is needed if url is relevant to external storage.
Parameters:
[in]urlThe url of the image resource to display
Returns:
A handle to a newly allocated ImageView
static ImageView Dali::Toolkit::ImageView::New ( const std::string &  url,
ImageDimensions  size 
) [static]

Creates an initialized ImageView from a URL to an image resource.

If the string is empty, ImageView will not display anything.

Since:
3.0, DALi version 1.1.10
Remarks:
http://tizen.org/privilege/internet is needed if url is a http or https address.
http://tizen.org/privilege/mediastorage is needed if url is relevant to media storage.
http://tizen.org/privilege/externalstorage is needed if url is relevant to external storage.
Parameters:
[in]urlThe url of the image resource to display
[in]sizeThe width and height to which to fit the loaded image
Returns:
A handle to a newly allocated ImageView
Note:
A valid size is preferable for efficiency. However, do not set a size that is bigger than the actual image size, as up-scaling is not available. The content of the area not covered by the actual image is undefined and will not be cleared.
ImageView& Dali::Toolkit::ImageView::operator= ( const ImageView imageView)

Assignment operator.

Since:
3.0, DALi version 1.0.0
Parameters:
[in]imageViewThe ImageView to assign from
Returns:
The updated ImageView

Sets this ImageView from an Image instance.

Deprecated:
Deprecated since 3.0, DALi version 1.2.8, use SetImage( const std::string& ) instead.

If the handle is empty, ImageView will display nothing

Since:
3.0, DALi version 1.0.0
Parameters:
[in]imageThe Image instance to display.
void Dali::Toolkit::ImageView::SetImage ( const std::string &  url)

Sets this ImageView from the given URL.

If the URL is empty, ImageView will not display anything.

Since:
3.0, DALi version 1.1.4
Remarks:
http://tizen.org/privilege/internet is needed if url is a http or https address.
http://tizen.org/privilege/mediastorage is needed if url is relevant to media storage.
http://tizen.org/privilege/externalstorage is needed if url is relevant to external storage.
Parameters:
[in]urlThe URL to the image resource to display
void Dali::Toolkit::ImageView::SetImage ( const std::string &  url,
ImageDimensions  size 
)

Sets this ImageView from the given URL.

If the URL is empty, ImageView will not display anything.

Since:
3.0, DALi version 1.1.10
Remarks:
http://tizen.org/privilege/internet is needed if url is a http or https address.
http://tizen.org/privilege/mediastorage is needed if url is relevant to media storage.
http://tizen.org/privilege/externalstorage is needed if url is relevant to external storage.
Parameters:
[in]urlThe URL to the image resource to display
[in]sizeThe width and height to fit the loaded image to